Sanyo KS1872 Technical Service Manual

refrigerant R410A. Pay special attention when servicing the unit. TECHNICAL & SERVICE MANUAL KS1872 + C1872 + CL1872 KS2472 + C2472 + CL2472 DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Unit FILE NO. Destination: North America Outdoor Model No. C1872 C2472 CL1872 CL2472 Product Code No. 1 852 330 36 1 852 330 37 1 852 330 40 1 852 330 41 Outdoor Unit KS1872 KS2472 C1872 CL1872 C2472 CL2472 REFERENCE NO. SM700663 Indoor Model No. KS1872 KS2472 Product Code No. 1 852 099 83 1 852 099 84 AIR CONDITIONER

SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM. SPECIAL PRECAUTIONS This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death. This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage. CAUTION CAUTION WARNING WARNING Important! Please Read Before Starting This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently. For safe installation and trouble-free operation, you must: Carefully read this instruction booklet before beginning. Follow each installation or repair step exactly as shown. Observe all local, state, and national electrical codes. Pay close attention to all warning and caution notices given in this manual. If Necessary, Get Help These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions. In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document. Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked. Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. Ground the unit following local electrical codes. Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard. When Transporting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers. When Installing In a Ceiling or Wall Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support. In a Room Properly insulate any tubing run inside a room to prevent "sweating" that can cause dripping and water damage to walls and floors. In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration. In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle. In a Snowy Area (for Heat Pump-type Systems) Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents. When Connecting Refrigerant Tubing Use the flare method for connecting tubing. Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection. Check carefully for leaks before starting the test run. When Servicing Turn the power off at the main power box (mains) before opening the unit to check or repair electrical parts and wiring. Keep your fingers and clothing away from any moving parts. Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced. Others Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas. Confirm upon completing installation that no refrigerant gas is leaking. If escaped gas comes in contact with a stove, gas water heater, electric room heater or other heat source, it can produce dangerously toxic gas. • • • • • • • • • • • • 2

1. OPERATING RANGE 2. SPECIFICATIONS 2-1. Unit Specifications 2-2. Major Component Specifications 2-3. Other Component Specifications 3. DIMENSIONAL DATA 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram 5. PERFORMANCE DATA 5-1. Temperature Charts 5-2. Air Throw Distance Charts 6. ELECTRICAL DATA 6-1. Electrical Characteristics 6-2. Electric Wiring Diagrams 7. INSTALLATION INSTRUCTIONS 7-1. Installation Site Selection 7-2. Recommended Wire Length and Diameter 7-3. Remote Control Unit Installation Position 7-4. How to Test Run the Air Conditioner 7-5. Remove the Grille to Install the Indoor Unit 8. MAINTENANCE 8-1. Address Setting of the Remote Control Unit 8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit 9. FUNCTIONS 9-1. Operation Functions 9-2. Protective Functions 5 6 14 20 21 24 25 29 31 33 37 39 40 41 42 43 44 45 47 ................................................................................................................... ............................................................................................................. ....................................................................................... ....................................................................................... ..................................................................................................................... ................................................................................................... ............................................................................................................ ................................................................................................. .................................................................................................... .................................................................................................... ................................................................................................... ........................................................................ ........................................................................... ................................................................................... ........................................................................ ....................................................................... .................................. ........................................................................................................... ........................................................................................................... Page 3

10-2. Method of Self-Diagnostics 10-3. Checking the Indoor and Outdoor Units 10-4. Trouble Diagnosis of Fan Motor 10-5. Noise Malfunction and Electromagnetic Interference 11. CHECKING ELECTRICAL COMPONENTS 11-1. Measurement of Insulation Resistance 11-2. Checking Continuity of Fuse on PCB Ass'y 12. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT 12-1. Characteristics of New Refrigerant R410A 12-2. Checklist before Servicing 12-3. Tools Specifically for R410A 12-4. Tubing Installation Procedures 12-5. In Case of Compressor Malfunction 12-6. In Case Refrigerant is Leaking 12-7. Charging Additional Refrigerant 12-8. Retro-Fitting Existing Systems APPENDIX INSTRUCTION MANUAL 48 48 51 52 54 55 56 57 58 59 59 60 62 63 63 64 ........................................................... ................................................................................................. .............................................................................. .......................................................................................... .......................................................... ............................................................................... ......................................................................... ......................................................................... ................................................................................................... ................................................................................................ ............................................................................................ .................................................................................... ............................................................................................ .......................................................................................... ............................................................................................ ............................................................................................ Page 4

67 °F D.B. / 57 °F W.B. 1. OPERATING RANGE Maximum Minimum 115 °F D.B. 67 °F D.B. Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Cooling 95 °F D.B. / 71 °F W.B. 67 °F D.B. / 57 °F W.B. Maximum Minimum 115 °F D.B. 0 °F D.B. Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Cooling Models : KS1872 + C1872 KS2472 + C2472 Models : KS1872 + CL1872 KS2472 + CL2472 5

Indoor Unit KS1872 Outdoor Unit C1872 DATA SUBJECT TO CHANGE WITHOUT NOTICE. Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 17,700 ) Air Circulation (High) Shipping Volume 20 Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance % Power Factor Electrical Rating Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity A Controls / Temperature Control Control Unit Microprocessor / I.C. Thermister Wireless Remote Control Unit Manual Auto Timer Indoor / Outdoor Fan Speeds 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi,Me,Lo) Airflow Direction (Indoor) Horizontal R410A / 2.87 (1.3) Electric Expansion Valve Washable, Anti-Mold DC Twin Rotary (Inverter) Flare Type 25 (7.5) 42 / 38 / 30 / 28 51 1/4 (6.35) 1/2 (12.7) Optional / Air Clean Filter 11-23/32 (298) 26-3/8 (670) Moisture Removal (High) W Power Input V A Available Voltage Range Running Amperes 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) Vertical dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Depth Net Narrow tube Wide tube cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height 16 Cooling kW BTU/h 230V Single-Phase 60Hz 524 (890) 4.89 Cooling 187 to 253 ( 1.2 to 5.2 ) 17,600 5.15 93 ( 1.2 to 7.0 ) ( 250 to 1,500 ) 7.0 1,500 34-21/32 (880) 8-19/32 (218) 11-7/32 (285) 41-15/16 (1,065) 11-3/8 (289) 29-1/8 (740) 44-7/8 (1,140) 39-27/32 (1,012) 14-31/32 (380) 26.5 (12.0) 90.4 (41.0) 14-29/32 (379) 33.1 (15.0) 99.2 (45.0) 4.24 (0.12) 9.89 (0.28) < 230V >

Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 17,700 ) Air Circulation (High) Shipping Volume 4.24 (0.12) 9.89 (0.28) 33.1 (15.0) 99.2 (45.0) 14-31/32 (380) 26.5 (12.0) 90.4 (41.0) 14-29/32 (379) 44-7/8 (1,140) 39-27/32 (1,012) (285) 11-3/8 (289) 29-1/8 (740) 8-19/32 (218) 11-7/32 20 11-23/32 (298) 26-3/8 (670) 42 / 38 / 30 / 28 51 Manual Auto Electric Expansion Valve Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance % Power Factor Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity A Controls / Temperature Control Control Unit Microprocessor / I.C. Thermister Wireless Remote Control Unit Timer Indoor / Outdoor Fan Speeds 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi,Me,Lo) Airflow Direction (Indoor) Horizontal R410A / 2.87 (1.3) Washable, Anti-Mold DC Rotary (Inverter) Vertical Flare Type 25 (7.5) 1/4 (6.35) 1/2 (12.7) Optional / Air Clean Filter 41-15/16 (1,065) 34-21/32 (880) Electrical Rating Moisture Removal (High) W Power Input V A Available Voltage Range Running Amperes 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Depth Net Narrow tube Wide tube cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height 16 Cooling kW BTU/h 208V Single-Phase 60Hz 524 (890) 4.89 Cooling 187 to 253 ( 1.2 to 5.2 ) 17,600 5.15 94 ( 1.2 to 7.7 ) ( 250 to 1,500 ) 7.7 1,500 < 208V >

Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 24,200 ) Air Circulation (High) Shipping Volume 4.24 (0.12) 12.71 (0.36) 33.1 (15.0) 127.9 (58.0) 16-1/4 (413) 26.5 (12.0) 119.0 (54.0) 44-7/8 (1,140) 40-5/8 (1,032) (320) 11-3/8 (289) 33-27/32 (860) 20 11-23/32 (298) 29-1/8 (740) 47 / 44 / 41 / 30 55 Manual Auto Electric Expansion Valve Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance % Power Factor Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity A Controls / Temperature Control Control Unit Microprocessor / I.C. Thermister Wireless Remote Control Unit Timer Indoor / Outdoor Fan Speeds 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi,Me,Lo) Airflow Direction (Indoor) Horizontal R410A / 4.30 (1.95) Washable, Anti-Mold DC Twin Rotary (Inverter) Vertical Flare Type 33 (10) 1/4 (6.35) 5/8 (15.88) Optional / Air Clean Filter 41-15/16 (1,065) 14-29/32 (379) 35-7/16 (900) 8-19/32 (218) 12-19/32 Electrical Rating Moisture Removal (High) W Power Input V A Available Voltage Range Running Amperes 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Depth Net Narrow tube Wide tube cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height 16 Cooling kW BTU/h 230V Single-Phase 60Hz 600 (1,020) 4.89 Cooling 187 to 253 ( 1.2 to 7.1 ) 24,200 7.1 95 ( 1.3 to 10.8 ) ( 280 to 2,355 ) 10.8 2,355 < 230V >

Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 24,200 ) Air Circulation (High) Shipping Volume A Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance Electrical Rating Moisture Removal (High) W Microprocessor / I.C. Thermister Wireless Remote Control Unit % Power Factor Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity Airflow Direction (Indoor) Horizontal Controls / Temperature Control Control Unit Timer Indoor / Outdoor Fan Speeds 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi,Me,Lo) Washable, Anti-Mold DC Twin Rotary (Inverter) Manual Auto Flare Type 33 (10) R410A / 4.30 (1.95) Electric Expansion Valve Power Input V A Available Voltage Range Running Amperes 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) Vertical dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Depth Net Narrow tube Wide tube cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height 16 Cooling kW BTU/h 208V Single-Phase 60Hz 600 (1,020) 4.89 Cooling 187 to 253 ( 1.2 to 7.1 ) 24,200 7.1 94 ( 1.3 to 12.1 ) ( 280 to 2,350 ) 12.1 2,355 20 11-23/32 (298) 29-1/8 (740) 47 / 44 / 41 / 30 55 1/4 (6.35) 5/8 (15.88) Optional / Air Clean Filter 35-7/16 (900) 8-19/32 (218) 12-19/32 (320) 41-15/16 (1,065) 11-3/8 (289) 33-27/32 (860) 44-7/8 (1,140) 40-5/8 (1,032) 16-1/4 (413) 26.5 (12.0) 119.0 (54.0) 14-29/32 (379) 33.1 (15.0) 127.9 (58.0) 4.24 (0.12) 12.71 (0.36) < 208V >

Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 17,700 ) Air Circulation (High) Shipping Volume A Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance Electrical Rating Moisture Removal (High) W Microprocessor / I.C. Thermister Wireless Remote Control Unit % Power Factor Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity Airflow Direction (Indoor) Horizontal Controls / Temperature Control Control Unit Timer Indoor / Outdoor Fan Speeds 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi and multi steps) Washable, Anti-Mold DC Twin Rotary (Inverter) Manual Auto Flare Type 33 (10) R410A / 2.87 (1.3) Electric Expansion Valve 1/4 (6.35) 1/2 (12.7) Optional / Air Clean Filter 11-23/32 (298) 26-3/8 (670) Power Input V A Available Voltage Range Running Amperes 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) Vertical dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Depth Net Narrow tube Wide tube cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height 16 Cooling kW BTU/h 230V Single-Phase 60Hz 524 (890) 4.89 Cooling 187 to 253 ( 1.2 to 5.2 ) 17,600 5.15 93 ( 1.2 to 7.0 ) ( 250 to 1,500 ) 7.0 1,500 34-21/32 (880) 8-19/32 (218) 11-7/32 (285) 41-15/16 (1,065) (1,012) 11-3/8 (289) 29-1/8 (740) 33.1 44-7/8 (1,140) 39-27/32 14-31/32 (380) 26.5 (12.0) 90.4 (41.0) 14-29/32 (379) 20 42 / 38 / 30 / 28 51 4.24 (0.12) 9.89 (0.28) (15.0) 99.2 (45.0) < 230V >

Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 17,700 ) Air Circulation (High) Shipping Volume 20 42 / 38 / 30 / 28 51 4.24 (0.12) 9.89 (0.28) (15.0) 99.2 (45.0) (380) 26.5 (12.0) 90.4 (41.0) 14-29/32 (379) 33.1 44-7/8 (1,140) 39-27/32 14-31/32 (1,012) 11-3/8 (289) 29-1/8 (740) 34-21/32 (880) 8-19/32 (218) 11-7/32 (285) 41-15/16 (1,065) ( 1.2 to 5.2 ) 17,600 5.15 94 ( 1.2 to 7.7 ) ( 250 to 1,500 ) 7.7 1,500 16 Cooling kW BTU/h 208V Single-Phase 60Hz 524 (890) 4.89 Cooling 187 to 253 cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height Depth Net Narrow tube Wide tube Vertical dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) Power Input V A Available Voltage Range Running Amperes 1/4 (6.35) 1/2 (12.7) Optional / Air Clean Filter 11-23/32 (298) 26-3/8 (670) Flare Type 33 (10) R410A / 2.87 (1.3) Electric Expansion Valve 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi and multi steps) Washable, Anti-Mold DC Twin Rotary (Inverter) Manual Auto Airflow Direction (Indoor) Horizontal Controls / Temperature Control Control Unit Timer Indoor / Outdoor Fan Speeds Microprocessor / I.C. Thermister Wireless Remote Control Unit % Power Factor Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity A Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance Electrical Rating Moisture Removal (High) W < 208V >

Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 24,200 ) Air Circulation (High) Shipping Volume 20 47 / 44 / 41 / 30 55 4.24 (0.12) 12.71 (0.36) 33.1 (15.0) 127.9 (58.0) 16-1/4 (413) 26.5 (12.0) 119.0 (54.0) 14-29/32 (379) 44-7/8 (1,140) 40-5/8 (1,032) 11-3/8 (289) 33-27/32 (860) 35-7/16 (900) 8-19/32 (218) 12-19/32 (320) 41-15/16 (1,065) ( 1.2 to 7.1 ) 24,200 7.1 95 ( 1.3 to 10.8 ) ( 280 to 2,355 ) 10.8 2,355 16 Cooling kW BTU/h 230V Single-Phase 60Hz 600 (1,020) 4.89 Cooling 187 to 253 cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height Depth Net Narrow tube Wide tube Vertical dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) Power Input V A Available Voltage Range Running Amperes 1/4 (6.35) 5/8 (15.88) Optional / Air Clean Filter 11-23/32 (298) 29-1/8 (740) Flare Type 33 (10) R410A / 4.30 (1.95) Electric Expansion Valve 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi and multi steps) Washable, Anti-Mold DC Twin Rotary (Inverter) Manual Auto Airflow Direction (Indoor) Horizontal Controls / Temperature Control Control Unit Timer Indoor / Outdoor Fan Speeds Microprocessor / I.C. Thermister Wireless Remote Control Unit % Power Factor Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity A Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance Electrical Rating Moisture Removal (High) W < 230V >

Remarks: Rating conditions are: Cooling: Indoor air temperature 80°F D.B. / 67°F W.B. Outdoor air temperature 95°F D.B. / 75°F W.B. ( 4,100 to 24,200 ) Air Circulation (High) Shipping Volume 20 47 / 44 / 41 / 30 55 4.24 (0.12) 12.71 (0.36) 33.1 (15.0) 127.9 (58.0) 16-1/4 (413) 26.5 (12.0) 119.0 (54.0) 14-29/32 (379) 44-7/8 (1,140) 40-5/8 (1,032) 11-3/8 (289) 33-27/32 (860) 35-7/16 (900) 8-19/32 (218) 12-19/32 (320) 41-15/16 (1,065) ( 1.2 to 7.1 ) 24,200 7.1 94 ( 1.3 to 12.1 ) ( 280 to 2,355 ) 12.1 2,355 16 Cooling kW BTU/h 208V Single-Phase 60Hz 600 (1,020) 4.89 Cooling 187 to 253 cu.ft (m 3) Indoor : Hi/Me/Lo/Qt* Shipping inch (mm) inch (mm) inch (mm) inch (mm) inch (mm) Height Depth Net Narrow tube Wide tube Vertical dB-A dB-A Air Filter Operation Sound Compressor Refrigerant / Amount charged at shipment lb. (kg) Refrigerant Control Max. allowable tubing length at shipment Outdoor : Hi inch (mm) inch (mm) lb. (kg) lb. (kg) Unit Dimensions Package Dimensions Weight inch (mm) Depth Height Width Width 17.5 Dimensions & Weight (*Qt = Quiet mode) Refrigerant Tubing Connections Refrigerant Tube Kit / Accessories Refrigerant Tube Diameter Outdoor Unit Indoor Unit ft. (m) Power Input V A Available Voltage Range Running Amperes 1/4 (6.35) 5/8 (15.88) Optional / Air Clean Filter 11-23/32 (298) 29-1/8 (740) Flare Type 33 (10) R410A / 4.30 (1.95) Electric Expansion Valve 24-Hour ON or OFF Timer, 1-Hour OFF Timer Auto and 3 steps / Auto (Hi and multi steps) Washable, Anti-Mold DC Twin Rotary (Inverter) Manual Auto Airflow Direction (Indoor) Horizontal Controls / Temperature Control Control Unit Timer Indoor / Outdoor Fan Speeds Microprocessor / I.C. Thermister Wireless Remote Control Unit % Power Factor Features SEER Compressor Locked Rotor Amperes BTU/W A Fuse or Circuit Breaker Capacity A Voltage Rating Pints/h Capacity ft 3/min (m 3/h) Performance Electrical Rating Moisture Removal (High) W < 208V >

2-2-1. Indoor Unit Indoor Unit KS1872 DATA SUBJECT TO CHANGE WITHOUT NOTICE. Micro F VAC - Over-Heat Protection (Ambient Temp. 68 oF (20 oC)) Coil Resistance Ohm Coil Resistance Ohm Safety Device Flap Motor Type Stepping Motor Rough Measure RPM (Cool) Run Capacitor Type DC Motor Q'ty ... Dia. and Length Type 30 1,250 Model ... Q'ty No. of Poles SIC-39CVL-D847-2-A ... 1 8 Nominal Output W Model Over-Current Protection inch (mm) (Ambient Temp. 77 oF (25 oC )) Each Pair of Terminal : 400 +/- 7% Control PCB CB-KS1872 Part No. Fan Motor MP24Z3 DC 12V Rating Type Heat Exchanger Coil Microprocessor 250V 3A Control Circuit Fuse Controls 1 ... D3-11/16 / L33-9/32 (D94/L845) RCS-4VPIS4U Fan Cross-Flow Remote Control Unit Face Area ft 2 (m 2) 3.07 (0.285) Coil Rows Fins per inch - Yes Yes - Internal Controller Aluminum Plate Fin / Copper Tube 2 19.5

Micro F VAC - Yes Yes - Internal Controller Aluminum Plate Fin / Copper Tube 2 Heat Exchanger Coil Face Area ft 2 (m 2) 3.07 (0.285) Coil Rows Fins per inch 19.5 Microprocessor 250V 3A Control Circuit Fuse Controls 1 ... D3-11/16 / L33-9/32 (D94/L845) RCS-4VPIS4U Fan Cross-Flow Remote Control Unit inch (mm) Type Q'ty ... Dia. and Length (Ambient Temp. 77 oF (25 oC )) Each Pair of Terminal : 400 +/- 7% Control PCB CB-KS2472 Part No. Fan Motor - MP24Z3 DC 12V Coil Resistance Ohm Safety Device Rating Type Model Over-Current Protection Over-Heat Protection (Ambient Temp. 68 oF (20 oC)) Nominal Output W Coil Resistance Ohm 30 1,500 Model ... Q'ty No. of Poles SIC-39CVL-D847-2-A ... 1 8 Type Flap Motor Type Stepping Motor Rough Measure RPM (Cool) Run Capacitor DC Motor

Outdoor Unit C1872 DATA SUBJECT TO CHANGE WITHOUT NOTICE. Pints (cc) Ohm R - S : 0.482 S - T : 0.482 T - R : 0.482 CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp. Model Operation Temp. Micro F VAC RED - WHT : 77.5 WHT - BLU : 77.5 BLU - RED : 77.5 Type Over- Current Protection Micro F VAC Compressor inch (mm) Type Crankcase Heater - Yes Safety Device Rough Measure RPM (Cool) Run Capacitor Type Model ... Q'ty No. of Poles W Ohm Nominal Output 50 Control PCB CB-C1872 Part No. Fan Motor Type Compressor Model / Nominal Output Compressor Oil ... Amount - 1 ... D16 -17/32 (D420) Fan Propeller (Ambient Temp. 68 oF (20 oC)) DAJ12-55J71A-CU ... 1 8 820 DC Motor Q'ty ... Dia. Coil Resistance Microprocessor 250V 25A Control Circuit Fuse Controls Face Area ft 2 (m 2) 5.49 (0.510) Coil Rows Fins per inch 21.2 - Yes - Internal Controller Aluminum Plate Fin / Copper Tube 2 Heat Exchanger Coil Run Capacitor CS-7L115 Open : 239 oF(115 oC), Close : 203 oF(95 oC) Overload Relay Coil Resistance (Ambient Temp. 68 oF (20 oC)) External Finish Acrylic baked-on enamel finish DC Twin Rotary (Hermetic) C-6RVN93H0M / 1,050W FV50S ... 0.74 (350) Yes Safety Device Yes -

Pints (cc) Ohm U - V : 0.36 V - W : 0.36 W - U : 0.36 CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp. Model Operation Temp. Micro F VAC Type Over- Current Protection Over- Heat Protection Micro F VAC DC Motor Q'ty ... Dia. Compressor inch (mm) Type Crankcase Heater Safety Device Rough Measure RPM (Cool) Run Capacitor Type Model ... Q'ty No. of Poles W Ohm 8 Nominal Output Coil Resistance 90 850 - Control PCB CB-C2472 Part No. Fan Motor Type Compressor Model / Nominal Output Compressor Oil ... Amount - - Yes Heat Exchanger Coil Microprocessor 250V 25A Control Circuit Fuse Controls 1 ... D18-1/8 (D460) Fan Propeller (Ambient Temp. 68 oF (20 oC)) SIC-71FW-D490-1 ... 1 Coil Rows Fins per inch 18.1 Face Area ft 2 (m 2) 6.40 (0.595) Overload Relay - Yes - Internal Controller Aluminum Plate Fin / Copper Tube 2 DC Twin Rotary (Hermetic) G8T265FU1JW / 2,410W FV50S ... 1.49 (700) Yes Yes Coil Resistance (Ambient Temp. 77 oF (25 oC)) External Finish Acrylic baked-on enamel finish Safety Device Yes - Run Capacitor CS-7L115 Open : 239 oF(115 oC), Close : 203 oF(95 oC)

Pints (cc) Ohm R - S : 0.482 S - T : 0.482 T - R : 0.482 CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp. Model Operation Temp. Micro F VAC RED - WHT : 77.5 WHT - BLU : 77.5 BLU - RED : 77.5 Type Over- Current Protection Micro F VAC DC Motor Q'ty ... Dia. Compressor inch (mm) Type Crankcase Heater Safety Device Rough Measure RPM (Cool) Run Capacitor Type Model ... Q'ty No. of Poles W Ohm Nominal Output Coil Resistance 8 50 820 (Ambient Temp. 68 oF (20 oC)) Control PCB CB-CL1842 Part No. Fan Motor Type Compressor Model / Nominal Output Compressor Oil ... Amount - - Yes Heat Exchanger Coil Microprocessor 250V 25A Control Circuit Fuse Controls 1 ... D16 -17/32 (D420) Fan Propeller DAJ12-55J71A-CU ... 1 Run Capacitor Face Area ft 2 (m 2) 5.49 (0.510) Coil Rows Fins per inch Aluminum Plate Fin / Copper Tube 2 21.2 Open : 239 oF(115 oC), Close : 203 oF(95 oC) Overload Relay - - Yes - Internal Controller Coil Resistance (Ambient Temp. 68 oF (20 oC)) External Finish Acrylic baked-on enamel finish DC Twin Rotary (Hermetic) C-6RVN93H0M / 1,050W FV50S ... 0.74 (350) Yes Safety Device Yes CS-7L115

Pints (cc) Ohm U - V : 0.36 V - W : 0.36 W - U : 0.36 CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp. Model Operation Temp. Micro F VAC Type Over- Current Protection Over- Heat Protection Micro F VAC SIC-71FW-D490-1 ... 1 Rows Fins per inch 2 18.1 Internal Controller 8 1 ... D18-1/8 (D460) Fan Propeller Run Capacitor Q'ty ... Dia. - Control Circuit Fuse Controls Coil Resistance (Ambient Temp. 77 oF (25 oC)) DC Twin Rotary (Hermetic) G8T265FU1JW / 2,410W FV50S ... 1.49 (700) Part No. Fan Motor Type Compressor Model / Nominal Output Compressor Oil ... Amount - 230V 30W Yes Microprocessor 250V 25A Coil Resistance 90 850 (Ambient Temp. 68 oF (20 oC)) - Compressor inch (mm) Type Crankcase Heater Control PCB CB-CL2472 Yes - Heat Exchanger Coil Aluminum Plate Fin / Copper Tube Coil Acrylic baked-on enamel finish External Finish Face Area ft 2 (m 2) 6.40 (0.595) DC Motor Safety Device Rough Measure RPM (Cool) Type Model ... Q'ty No. of Poles W Run Capacitor - Yes Safety Device Yes Yes Overload Relay Open : 239 oF(115 oC), Close : 203 oF(95 oC) CS-7L115 Ohm Nominal Output

Indoor Unit KS1872 KS2472 Outdoor Unit C1872 C2472 CL1872 CL2472 0 32 50 68 86 104 122 140 158 176 194 (0) (10) (20) (30) (40) (50) (60) (70) (80) (90) 40 60 80 100 120 140 160 180 200 20 50 1 0 2 3 4 5 6 7 8 9 10 59 68 77 86 95 104 (10) (15) (20) (25) (30) (35) (40) Indoor air temp sensor (Model:PTM-D51H-S3 TH2) Indoor heat exchanger sensor (Model:PTM-D51H-S3 TH1) Compressor temp sensor (Model:TKS 293B) Resistance (k ohm) Resistance (k ohm) Temperature °F (°C) Outdoor air temp sensor (Model:TKS295B) Outdoor heat exchanger sensor (Model:TKS292B) 40 35 30 25 20 15 10 5 0 -4 5 14 23 32 41 50 59 68 (-20)(-15)(-10) (-5) (0) (5) (10) (15) (20) Resistance (k ohm) Temperature °F (°C) Temperature °F (°C) 20

dia.1/4" (6.35) Wide tube service valve dia.1/2" (12.70) 4-3/8 2-5/32 6-17/32 5-23/32 3/32 26-3/8 (670) 23/32 1-13/16 34-21/32 (880) 23-15/16 5-11/32 15/32 11-7/32 (285) 12-7/32 13-5/32 11-17/32 ID:23/32 2-ID:15/16 1-3/8 2-17/32 2-13/32 Outdoor Unit C1872 CL1872 22

dia.5/8" (15.88) Narrow tube service valve dia.1/4" (6.35) 4-7/16 5-29/32 2-1/32 4-1/2 29-1/8 (740) 23/32 1-21/32 35-7/16(900) 23-15/16 5-11/32 15/32 12-19/32(320) 13-19/32 14-17/32 11-17/32 ID:23/32 2-ID:15/16 1-3/8 2-15/16 2-7/8 Unit: inch(mm) Outdoor Unit C2472 CL2472 23

O.D.5/8"(15.88mm) ... 2472 class O.D. 1/4" (6.35 mm) H.P. High pressure switch 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit KS1872 KS2472 Outdoor Unit C1872 C2472 CL1872 CL2472 Insulation of Refrigerant Tubing Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min. 5/16"(8 mm). After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack. Wide tube Thickness: Min. 5/16"(8 mm) Insulation Narrow tube Thickness: Min. 5/16"(8 mm) IMPORTANT CAUTION 24

5-1. Temperature Charts Indoor Unit KS1872 Outdoor Unit C1872 Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "9-2. Overload prevention during heating.") :Points of rating condition Black dots in above charts indicate the following rating conditions. NOTE Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B. Outdoor air temperature 95 °F D.B. Operating current (A) Indoor discharge air temperature °F(°C) 77 (25) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Outdoor inlet air D.B. temp. °F(°C) 77 (25) 9 8 7 6 86 (30) 95 (35) 104 (40) 77 (25) 50.0(10) 60.8(16) 53.6(12) 57.2(14) 64.4(18) 68.0(20) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Outdoor fan speed High Low Outdoor fan speed High Low Outdoor fan speed High Low 75°F (24°C) Indoor air temp.86°F (30°C) 80°F (27°C) 80°F (27°C) Indoor air temp.86°F (30°C) 75°F (24°C) 80°F (27°C) 75°F (24°C) Indoor air temp.86°F (30°C) Low pressure at wide tube service valve psig (MPaG) 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) Cooling Characteristics (230V) 25

Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "9-2. Overload prevention during heating.") :Points of rating condition Black dots in above charts indicate the following rating conditions. Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B. Outdoor air temperature 95 °F D.B. Operating current (A) Indoor discharge air temperature °F(°C) 77 (25) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Outdoor inlet air D.B. temp. °F(°C) 77 (25) 9 8 7 6 86 (30) 95 (35) 104 (40) 77 (25) 50.0(10) 60.8(16) 53.6(12) 57.2(14) 64.4(18) 68.0(20) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Outdoor fan speed High Low Outdoor fan speed High Low Outdoor fan speed High Low 75°F (24°C) Indoor air temp.86°F (30°C) 80°F (27°C) 80°F (27°C) Indoor air temp.86°F (30°C) 75°F (24°C) 80°F (27°C) 75°F (24°C) Indoor air temp.86°F (30°C) Low pressure at wide tube service valve psig (MPaG) 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) Cooling Characteristics (230V) 26

Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "9-2. Overload prevention during heating.") :Points of rating condition Black dots in above charts indicate the following rating conditions. Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B. Outdoor air temperature 95 °F D.B. Cooling Characteristics (230V) Outdoor fan speed High Low Outdoor fan speed High Low Outdoor fan speed High Low 75°F (24°C) Indoor air temp.86°F (30°C) 80°F (27°C) Indoor air temp.86°F (30°C) 75°F (24°C) 80°F (27°C) 75°F (24°C) Indoor air temp.86°F (30°C) Operating current (A) Indoor discharge air temperature °F(°C) 77 (25) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Outdoor inlet air D.B. temp. °F(°C) 77 (25) 15 14 13 12 11 10 9 86 (30) 95 (35) 104 (40) 77 (25) 50.0(10) 60.8(16) 53.6(12) 57.2(14) 64.4(18) 68.0(20) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Low pressure at wide tube service valve psig (MPaG) 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) 80°F (27°C) 27

Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "9-2. Overload prevention during heating.") :Points of rating condition Black dots in above charts indicate the following rating conditions. Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B. Outdoor air temperature 95 °F D.B. Cooling Characteristics (230V) Outdoor fan speed High Low Outdoor fan speed High Low Outdoor fan speed High Low 75°F (24°C) Indoor air temp.86°F (30°C) 80°F (27°C) Indoor air temp.86°F (30°C) 75°F (24°C) 80°F (27°C) 75°F (24°C) Indoor air temp.86°F (30°C) Operating current (A) Indoor discharge air temperature °F(°C) 77 (25) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Outdoor inlet air D.B. temp. °F(°C) 77 (25) 15 14 13 12 11 10 9 86 (30) 95 (35) 104 (40) 77 (25) 50.0(10) 60.8(16) 53.6(12) 57.2(14) 64.4(18) 68.0(20) 86 (30) 95 (35) 104 (40) Outdoor inlet air D.B. temp. °F(°C) Low pressure at wide tube service valve psig (MPaG) 159 (1.1) 145 (1.0) 131 (0.9) 117 (0.8) 80°F (27°C) 28

Axis air velocity (ft./sec.) Vertical distance (ft.) Room air temp. : 80°F (26.7°C) Fan speed : High Cooling : Flap angle 0 , : Axis air velocity 0 : Flap angle 30 , : Axis air velocity 30 5-2. Air Throw Distance Charts Indoor Unit KS1872 29 0 5 10 15 0 5 10 15 20 25 30

Axis air velocity (ft./sec.) Vertical distance (ft.) Room air temp. : 80°F (26.7°C) Fan speed : High Cooling : Flap angle 0 , : Axis air velocity 0 : Flap angle 30 , : Axis air velocity 30 Indoor Unit KS2472 30 0 5 10 15 0 5 10 15 20 25 30

6-1. Electrical Characteristics Indoor Unit KS1872 Outdoor Unit C1872 Indoor Unit Outdoor Unit Fan Motor Fan Motor + Compressor Performance at 230V Single-phase 60Hz Rating conditions Running amp. A 0.3 Power input W A W A W A W 32 6.7 1,468 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Cooling 7.0 1,500 Indoor Unit Outdoor Unit Fan Motor Fan Motor + Compressor Performance at 208V Single-phase 60Hz Rating conditions Running amp. 0.3 Power input 32 7.4 1,468 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Cooling 7.7 1,500 Indoor Unit KS1872 Outdoor Unit CL1872 Indoor Unit Outdoor Unit Fan Motor Fan Motor + Compressor Performance at 230V Single-phase 60Hz Rating conditions Running amp. 0.3 Power input 32 6.7 1,468 Cooling 7.0 1,500 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Indoor Unit Outdoor Unit Fan Motor Fan Motor + Compressor Performance at 208V Single-phase 60Hz Rating conditions Running amp. 0.3 Power input 32 7.4 1,468 Cooling 7.7 1,500 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Complete Unit < 230V > < 208V > < 230V > < 208V > Complete Unit Complete Unit Complete Unit 31

Performance at 230V Single-phase 60Hz Rating conditions Running amp. A 0.5 Power input W A W A W A W 55 10.3 2,300 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Cooling 10.8 2,355 Indoor Unit Outdoor Unit Fan Motor Fan Motor + Compressor Performance at 208V Single-phase 60Hz Rating conditions Running amp. 0.5 Power input 55 11.6 2,300 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Cooling 12.1 2,355 Indoor Unit KS2472 Outdoor Unit CL2472 Indoor Unit Outdoor Unit Fan Motor Fan Motor + Compressor Performance at 230V Single-phase 60Hz Rating conditions Running amp. 0.5 Power input 55 10.3 2,300 Cooling 10.8 2,355 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Indoor Unit Outdoor Unit Fan Motor Fan Motor + Compressor Performance at 208V Single-phase 60Hz Rating conditions Running amp. 0.5 Power input 55 11.6 2,300 Cooling 12.1 2,355 Rating conditions: Indoor air temperature: 80°F (26.7°C) D.B. / 67°F (19.4°C) W.B. Outdoor air temperature: 95°F (35°C) D.B. Complete Unit < 230V > < 208V > < 230V > < 208V > Complete Unit Complete Unit Complete Unit 32

GRN/YEL LAMP 10P(WHT) FLAP 5P (WHT) FLAP CONNECTOR FLAP MOTOR RED PNK BLU BRN YEL 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 AC1 AC2 SI WHT RED WHT WHT WHT WHT WHT WHT WHT WHT 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 IND LAMP ASSY ROOM/COIL 4P(WHT) DCM 6P(BLU) CONTROLLER FM FAN MOTOR 1 2 3 4 5 6 1 2 3 4 5 6 ROOM THERMISTOR BLK BLK BLK BLK 1 2 3 4 1 2 3 4 COIL THERMISTOR ION 3P (WHT) HA JEM-A 1 2 3 1 2 3 4P (WHT) 1 2 4 BLK 3 BLK BLK RED WHT 1 2 3 4 1 2 3 4 ION ASSY ION TERMINAL 1 2 3 WHT BLK RED RED BLK YEL WHT BLU 8FA2-5257-70500-0 6-2. Electric Wiring Diagrams Indoor Unit KS1872 KS2472 WARNING To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts. 33

CM COMPRESSOR MOTOR RED (PNK) WHT BLU RED (PNK) WHT BLU FERRITE CORE 3P-CONNECTOR (WHT) R S T W W W W W CONTROLLER 1 2 3 4 1 2 3 4 5 5 1 2 3 4 1 2 3 4 5 5 1 2 3 4 1 2 3 4 1 2 1 2 L1 W L2 W HIC+ W HIC+ E1 25A MV0 DCFM COMP A-TH U W V 2P-CONNECTOR (WHT) WHT WHT WHT WHT GRN/YEL 1 1 2 2 W E GRN/YEL TERMINAL PLATE FERRITE CORE GND TO INDOOR UNIT POWER RELAY 6 1 4 5 BLK BLK WHT 1 2 3 4 5 6 7 FM GRN/YEL FAN MOTOR 1 2 3 4 5 6 7 1 2 3 4 5 6 7 BLK BLK YEL BLK BLK BLU RED BLK BLK BLK WHT YEL BLU RED BLK YEL WHT GRY RED ORG WHT COMPRESSOR THERMISTOR OVERLOAD RELAY (OLR) OUT DOOR THERMISTOR 1 2 3 4 1 2 3 4 COIL/OUTDOOR YEL YEL COIL THERMISTOR 7P-CONNECTOR (WHT) MV MAGNETIC COIL 2P-CONNECTOR (RED) 2P-CONNECTOR (BLK) HIGH PRESSURE SWITCH 1 1 2 2 WHT WHT WHT WHT 1 1 2 2 WHT BRN W BD- W BD- WHT W HIC- W HIC- BLK W AC2 W AC2 BLU W A1 W A2 RED W ACIN1 W ACIN2 W SI-A BLK WHT RED BLK Outdoor Unit C1872 CL1872 WARNING To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts. 34

POWER RELAY 6 1 4 5 BLK BLK WHT BLK BLK 2P-CONNECTOR (BLK) HIGH PRESSURE SWITCH 1 1 2 2 WHT W ACIN1 W ACIN2 W SI-A BLK WHT RED BLK 8FA2-5257-68700-3 REACTANCE 3 2 1 1 2 3 CM COMPRESSOR MOTOR RED (PNK) WHT BLU RED (PNK) WHT BLU FERRITE CORE 3P-CONNECTOR (WHT) U V W W W W W CONTROLLER 1 2 3 4 1 2 3 4 5 5 1 2 3 4 1 2 3 4 5 5 1 2 3 4 1 2 3 4 1 2 1 2 L1 W L2 W HIC+ W HIC+ 25A MV0 DCFM COMP A-TH U W V 2P-CONNECTOR (WHT) WHT WHT WHT WHT 1 1 2 2 1 2 3 4 5 6 7 FM FAN MOTOR 1 2 3 4 5 6 7 1 2 3 4 5 6 7 ORG BLK BLK WHT BRN BLU BLK BLK RED ORG WHT BRN BLU YEL WHT GRY RED ORG RED COMPRESSOR THERMISTOR OVERLOAD RELAY (OLR) OUT DOOR THERMISTOR 1 2 3 4 1 2 3 4 COIL/OUTDOOR YEL YEL COIL THERMISTOR 7P-CONNECTOR (WHT) MV MAGNETIC COIL 2P-CONNECTOR (RED) WHT WHT WHT WHT 1 1 2 2 BRN W BD- W BD- WHT W HIC- W HIC- BLK W AC2 W AC2 BLU W E1 GRN/YEL W E GRN/YEL W A1 W A2 RED Outdoor Unit C2472 WARNING To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts. 35

POWER RELAY 6 1 4 5 BLK BLK WHT BLK BLK 2P-CONNECTOR (BLK) HIGH PRESSURE SWITCH 1 1 2 2 WHT W ACIN1 W ACIN2 W SI-A BLK WHT RED BLK 8FA2-5257-68400-3 REACTANCE 3 2 1 1 2 3 CM COMPRESSOR MOTOR RED (PNK) WHT BLU RED (PNK) WHT BLU FERRITE CORE 3P-CONNECTOR (WHT) U V W W W W W CONTROLLER 1 2 3 4 1 2 3 4 5 5 1 2 3 4 1 2 3 4 5 5 1 2 3 4 1 2 3 4 1 2 1 2 L1 W L2 W HIC+ W HIC+ 25A MV0 DCFM COMP A-TH U W V 2P-CONNECTOR (WHT) WHT WHT WHT WHT 1 1 2 2 1 2 3 4 5 6 7 FM FAN MOTOR 1 2 3 4 5 6 7 1 2 3 4 5 6 7 ORG BLK BLK WHT BRN BLU BLK BLK RED ORG WHT BRN BLU YEL WHT GRY RED ORG RED COMPRESSOR THERMISTOR OVERLOAD RELAY (OLR) OUT DOOR THERMISTOR 1 2 3 4 1 2 3 4 COIL/OUTDOOR YEL YEL COIL THERMISTOR 7P-CONNECTOR (WHT) MV MAGNETIC COIL 2P-CONNECTOR (RED) WHT WHT WHT WHT 1 1 2 2 BRN W BD- W BD- WHT W HIC- W HIC- BLK W AC2 W AC2 BLU W E1 GRN/YEL W E GRN/YEL W A1 W A2 RED W W HEATER0 HEATER1 1P-CONNECTOR (WHT) 1P-CONNECTOR (WHT) WHT WHT WHT WHT 1 1 1 1 CRANKCASE HEATER Outdoor Unit CL2472 WARNING To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts. 36

7-1. Installation Site Selection 7-1-1. Indoor Unit To prevent abnormal heat generation and the possibility of fire, do not place obstacles, enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow. For stable operation of the air conditioner, do not install wall-mounted type indoor units less than 5' (1.5 m) from floor level. AVOID: direct sunlight. nearby heat sources that may affect performance of the unit. areas where leakage of flammable gas may be expected. places where large amounts of oil mist exist. DO: select an appropriate position from which every corner of the room can be uniformly cooled. (High on a wall is best.) select a location that will hold the weight of the unit. select a location where tubing and drain hose have the shortest run to the outside. allow room for operation and maintenance as well as unrestricted air flow around the unit. (Fig. 1) install the unit within the maximum elevation difference (H) above or below the outdoor unit and within a total tubing length (L) from the outdoor unit as detailed in Table 1 and Fig. 2. Install the indoor unit more than 3.3' (1 m) away from any antenna or power lines or connecting wires used for television, radio, telephone, security system, or intercom. Electrical noise from any of these sources may affect operation. Table 1 Model KS1872 * If total tubing length becomes 25 to 98 ft. (Max.) or 33 to 131 ft. (Max.), charge additional refrigerant (R410A) by 0.27 oz. /ft. No additional charge of compressor oil is necessary. Max. Allowable Tubing Length at Shipment (ft.) 25 Limit of Tubing Length (L) (ft.) 98 Limit of Elevation Difference (H) (ft.) 49 Required Amount of Additional Refrigerant (oz. / ft.)* 0.27 KS2472 33 131 49 0.27 2" (5 cm) min. 2" (5 cm) min. 6" (15 cm) min. Front View INDOOR UNIT Tubing length (L) OUTDOOR UNIT Elevation difference (H) CAUTION Indoor unit Floor level Wall Minimum height from floor level 5' (1.5 m) Fig. 1 Fig. 2 Fig. 3 37

Air discharge Min. 2" (5 cm) Min. 1'4" (40 cm) Valve side Min. 10" (25 cm) Min. 7' (2 m) Min. 7' (2 m) Ground b O s elc a t Obstacle above id ri A s r a h c ge Min. 4" (10 cm) Air intake Air intake Concrete or equal ) m c 0 1 ( " 4 t u o b A Min. 4" (10 cm) Anchor bolts (4 pcs.) ) m c 0 4 ( " 4'1 t u o b A Fig. 5e Cushion rubber Fig. 5a (C1872, CL1872) Air inta ke Min. 8" (20 cm) Air discharge Min. 4" (10 cm) Min. 1'8" (50 cm) Valve side Min. 10" (25 cm) Min. 7' (2 m) Min. 7' (2 m) Ground b O s elc a t Obstacle above id ri A s r a h c ge Min. 8" (20 cm) Air intake Fig. 5b (C2472, CL2472) (C1872, CL1872) Fig. 5d Air inta ke Concrete or equal o b A u ) m c 5 1 ( " 6 t Min. 6" (15 cm) Anchor bolts (4 pcs.) o b A u ) m c 0 4 ( " 4'1 t (C2472, CL2472) Outdoor unit Hot air Heat source Exhaust fan NO 7-1-2. Outdoor Unit Fig. 4 AVOID: heat sources, exhaust fans, etc. (Fig. 4) damp, humid or uneven locations. DO: choose a place as cool as possible. choose a place that is well ventilated. allow enough room around the unit for air intake/ exhaust and possible maintenance. (Fig. 5a or 5b) provide a solid base (level concrete pad, concrete block, 4" × 1' 4" (10 × 40 cm) or 6" × 1'4" (15 × 40 cm) beams or equal), a minimum of 4" (10 cm) or 6" (15 cm) above ground level to reduce humidity and protect the unit against possible water damage and decreased service life. (Fig. 5c or 5d) Install cushion rubber under unit's feet to reduce vibration and noise. (Fig. 5e) use lug bolts or equal to bolt down unit, reducing vibration and noise. Install in a location where no antenna of a television or radio exists within 10' (3 m). 38

230 / 208V 230 / 208V INDOOR UNIT OUTDOOR UNIT Grounding line L1 L2 Power supply Single phase 230 / 208V 60HZ Terminal Terminal (A) (B) (C) (B) (A) Power Supply Wiring Length (ft.) (B) Power Line Length (ft.) (C) Control Line Length (ft.) (A)+(B) WARNING 7-2. Recommended Wire Length and Diameter Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation. Table 2 lists recommended wire lengths and diameters for power supply systems. Refer to the wiring system diagram (Fig. 6) for the meaning of (A), (B) and (C) in Table 2. Refer to your local codes or in the absence of local codes see the National Electric Code: ANSI/NFPA70. Be sure to comply with local codes on running the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.). Each wire must be firmly connected. No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part. Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram. The indoor unit draws its power from the outdoor unit. Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone, security system, or intercom any closer than 3' 4" (1 m) from the power cable and wires between the indoor and outdoor units. Electrical noise may affect the operation. To avoid the risk of electrical shock, each air conditioner unit must be grounded. For the installation of a grounding device, please observe local electrical codes. Grounding is necessary, especially for units using inverter circuits, in order to release charged electricity and electrical noise caused by high tension. Otherwise, electrical shock may occur. Place a dedicated ground more than 7' (2 m) away from other grounds and do not have it shared with other electric appliances. Table 2 AWG Fuse or Circuit Breaker Capacity 20A (#14) 131 (Max.) (#12) 230 (Max.) (#14) 65 (Max.) #...AWG (American Wire Gauge) C1872, C2472, CL1872, CL2472 Model Fig. 6 CAUTION WARNING NOTE WIRING SYSTEM DIAGRAM 39

The remote control unit can be operated from either a non-fixed position or a wall-mounted position. To ensure that the air conditioner operates correctly, do not install the remote control unit in the following places: In direct sunlight Behind a curtain or other place where it is covered More than 26' (8 m) away from the air conditioner In the path of the air conditioner’s airstream Where it may become extremely hot or cold Where it may be subject to electrical or magnetic interference Where there is an obstacle between the remote control unit and the air conditioner (since a check signal is sent from the remote control unit every 5 minutes) 7-3-1. Mounting on a Wall Before mounting the remote control unit, press the ON/OFF operation button at the mounting location to make sure that the air conditioner operates from that location. The indoor unit should make a beeping sound to indicate that it has received the signal. Fig. 7 To take out the remote control unit, pull it forward. Hole Remote control unit mount Rear side Press Set in place To prevent loss of the remote control unit, you can connect the remote control unit to the mount by passing a string through the remote control unit and attachment hole. Mounting screws 5/32 × 5/8"(4 × 16mm) (included) 40

controller and follow the steps below to conduct the test run. (1) Set the remote controller in Test Run mode. (Fig. 8a) a) b) c) Press and hold the ION button. Then press and hold the 1HR TIMER button. At the same time, press the ACL (reset) button once. Use a pointed object such as the tip of a pen to press the ACL button. After a few seconds, " " appears and "oP-1" blinks in the remote controller display area. (Fig. 8b) d) e) Release the 1HR TIMER button. Release the ION button. (2) Start Cooling mode test run by pressing the ON/OFF operation button of the remote controller. (Fig. 8a) This starts the fan producing uncooled forced air with the 4 indicator lamps (OPERATION lamp, TIMER lamp, QUIET lamp, and ION lamp) on the main unit blinking. (Fig. 8c) After 3 minutes, the system shifts into cooling operation, and cool air will start to be felt. Cool mode test run is unaffected by the room temperature. (3) Press the ON/OFF operation button of the remote controller again to stop the test run. (Fig. 8a) (4) Finally press the ACL (reset) button of the remote controller to release it from Test Run mode to return to normal mode. (Fig. 8a) " " and "oP-1" will disappear from the remote controller display area. After the test run is completed, be sure to press the ACL (reset) button to return to normal mode. The air conditioner will not operate correctly if this is not done. 7-4. How to Test Run the Air Conditioner IMPORTANT 41

Grille Fig. 9a Fig. 9b Cover Thermistor Fig. 10a Thermistor Fig. 10b Fig. 11a Tab Tab Fig. 11b Fig. 12b Pin Groove Fig. 12a 7-5. Remove the Grille to Install the Indoor Unit Basically, these models can be installed and wired without removing the grille. If access to any internal part is needed, follow the steps as given below. How to remove the grille (1) (2) (3) (4) (5) (6) Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you. (Fig. 9a) Remove the 3 screws. (Fig. 9b) Remove the screw on the right side cover plate and open the cover. (Fig. 10a) Take out the thermistor from the grille. (Fig. 10b) Press the 3 tabs at the top of the grille and the 3 tabs on the front face to separate the grille from the frame. (Fig. 11a) Pull the grill toward you to remove it. How to replace the grille (1) (2) (3) (4) (5) (6) (a) (b) When installing the grille, place the bottom of the grille into the frame first. (Fig. 11b) Then insert the tabs on the top of the grille and on the front face into the frame. Make sure that the grille and frame are firmly fitted together by engaging the tabs. Attach the thermistor on the grille. (Fig. 10a) Close the cover and replace the screw. (Fig. 10a) Affix the grille with the 3 previously removed screws. (Fig. 9b) Install the air intake grille. Allow the edge of the air intake grille to slide into the top of the indoor unit, and then insert it all the way inside. (Fig. 12a) Press the bottom right and left corners and center of the air intake grille to attach it to the indoor unit. (Fig. 12b) Attach so that the round pins at the top right and left cor- ners of the air intake grille are inserted into the grooves at the top right and left of the indoor unit. NOTE 42

Control Unit The address can be set in order to prevent interference between remote controllers when two Sanyo indoor units are installed near each other. The address is normally set to "A." To set a different address, it is necessary to change the address on the second remote controller. Once changed, you cannot restore the original address setting of the air conditioner. (1) Switch on the power source. (2) Break the address-setting tab marked "A" on the second remote controller to change the address (Fig. 13). When the tab is removed, the address is automatically set to B (Fig. 14). (3) Press and hold the remote controller ION button and 1 HR TIMER button. At the same time, press the ACL(reset) button. Use a thin object such as the tip of a pen to press the ACL button. When this has been done, "oP-1" (test run) appears, blinking, in the remote controller clock display area. (4) Each time the 1 HR TIMER button is pressed, the display changes as shown below. Press this button 2 times to change the display to "oP-7" (address setting). (Fig. 15) (5) "oP-7" has now been selected for address setting. (6) Press the ON/OFF operation button on the remote controller. (Fig. 15) Check that the "beep"signal- received sound is heard from the second indoor unit (approximately 5 times). The sound you hear is the signal that the remote controller address has been changed. (7) Finally press the remote controller ACL (reset) button to cancel the blinking "oP-7" display. (Fig. 15) Changing of the second remote controller address is now completed. NOTE Fig. 13 Fig. 14 Fig. 15 Tab ACL button Test run mode Self-diagnostic mode Address setting mode 43

basic structure is the same for each. How to Disconnect Hold the resin connector cover, and pull the connector off. You cannot disconnect the connector by pulling the wire since it is locked inside. Always hold the cover to disconnect. (See illustration at left.) For the connector without the resin cover, push the lock in the direction of "2" while pulling it off. How to Connect In order to connect, hold the resin cover of the connector and push it in. Confirm the click sound for the inside lock. Pull the cover upward When the cover is pulled upward, the lock is released with the sequence of 1 and 2. 8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit 44

temperature and fan speed according to the conditions in the room, in order to maintain a comfortable room environment. SENSOR DRY operation DRY operation is as shown in the figure below. PAM- control In order to further improve inverter performance, control is switched between PWM control at low operation speeds, and PAM control at high operation speeds, making the most effective use of power. The compressor operation frequency varies. The indoor fan operates with 1/f fluctuation. The compressor operates at a low operating frequency. The indoor fan operates with 1/f fluctuation. Monitoring operation takes place when the room temperature is below 59°F(15°C), or more than 5°F(3°C) below the set temperature. When the monitoring range is entered, the compressor stops, and the indoor fan operates with 1/f fluctuation. DRY A DRY B Monitor Conditions are monitored at all times when the room temperature is below 59°F(15°C). Load COOL zone A zone B zone Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used. The set temperature is 4°F(2°C) below the detected room temperature in the case of cooling operation. (GREEN) (Lamp Off) COOL STOP To operate the system, press the OPERATION button, which is also used as the receiver, below the unit display. Each time this button is pressed, the OPERATION lamp changes color to indicate the type of operation. Select the desired type of operation. The Sensor Dry operation during the Low Ambient Cooling Mode (outside air temperature:59°F(15°C) or lower) is as follows. The compressor operates a cycle of 3 minutes ON and 6 minutes OFF repeatedly. NOTE DRY A DRY B and 9. FUNCTIONS 9-1. Operation Functions (CLxx models only) 45

the same operating mode. This function is set with the HIGH POWER button on the remote controller. (It can be set regardless of the temperature and fan speed settings.) HIGH POWER operation from remote controller The unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is 1 step above "High." OPERATION lamp When HIGH POWER operation ends, the unit operates at low Hz for 5 minutes, regardless of the thermostat OFF conditions. When in DRY mode, operation is in the cooling zone. Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation. Frequency MAX 0 Start End Time 30 min. 5 min. Setting temperature Press the NIGHT SETBACK button When NIGHT SETBACK operation is set, the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep. When NIGHT SETBACK operation is set, " mark" appears on the remote controller. The main unit display lamp also becomes dimmer. COOL and DRY modes When the night setback mode is selected, the air conditioner automatically raises the temperature setting 2°F(1°C) when 30 minutes have passed after the selection was made, and then another 2°F(1°C) after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected. This enables you to save energy without sacrificing comfort. This function is convenient when gentle cooling is needed. TIMER lamp Green QUIET lamp Green ION lamp Green DRY operation Orange COOL operation Green FAN operation Green NOTE 30 min. 30 min. Time 2°F(1°C) 2°F(1°C) 46

Freeze prevention During COOL or DRY operation, freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below. 1. Freeze-prevention operation is engaged when the temperature of the indoor heat exchanger is below 43°F(6°C). 2. Restart after freeze-prevention operation occurs when the temperature of the indoor heat exchanger reaches 46°F(8°C) or above. a. Area: Automatic capacity control b. When the temperature drops below Point A, the operation frequency is reduced by a certain proportion. c. Area: Frequency increase is prohibited. d. When the temperature reaches Point C or above, freezing prevention is ended and control is the same as in the a area. * When the temperature drops to below 4°F(2°C) (continuously for 2 minutes or longer), the compressor stops. Once the freeze condition is detected, the air conditioner will work less than the maximum frequency until it is turned off. The Freeze Prevention Control during the Low Ambient Cooling Mode (outside air temperature:59°F(15°C) or lower) is as follows. The compressor stops when the temperature of indoor heat exchanger becomes less than 36°F(2°C). The compressor restarts when the temperature of indoor heat exchanger becomes 46°F(8°C) or higher. A * B C a b c d Indoor heat exchanger temperature (°F) 2 6 8 This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature. a. Area: Automatic capacity control. b. When the temperature rises above Point A, the operation frequency is reduced at a specified rate. c. Area: Further frequency increase is prohibited. d. When the temperature falls below Point B, prevention of a rise in frequency is released and the air conditioner operates as in a area. * The compressor will stop if the temperature of the compressor discharge exceeds 248°F(120°C) due to shortage of gas or other reason. Approx. 214 (101) A B a b c d Compressor discharge temperature °F(°C) Approx. 201 (94) NOTE 9-2. Protective Functions This function prevents the circuit breaker or fuse from operating to open the circuit. This function works when electrical current has increased due to an increase in the cooling load, or to a decrease in the power supply voltage. In these cases, operation frequency is reduced or operation is interrupted auto- matically to control the electrical current for operation. When the cause of the increase in electrical current is rectified, the system will resume operation in the original mode. Cooling Dry Peak current cut-off trips 22.5 Hz down 14.0 (A) CT (Peak current cut-off control) (CLxx models only) 47

Test run mode Self-diagnostics mode 10. TROUBLESHOOTING 10-1. Precautions before Performing Inspection or Repair NOTE PROCEDURE After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair. High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge (charging voltage DC 310V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be careful not to touch any electrified parts before the controller LED (red) turns OFF. If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller. 1: If the operation lamp blinks every 0.5 seconds immediately when the power is turned ON, there is an external ROM (OTP data) failure on the indoor circuit board, or a ROM socket insertion problem, or the ROM has not been installed. 2: The failure mode is stored in memory even when the power is not ON. Follow the procedure below to perform diagnostics. 10-2. Method of Self-Diagnostics Follow the procedure below to perform detailed trouble diagnostics. Step 1: Press and hold the remote controller ION button and 1 HR TIMER button. At the same time, press the ACL (reset) button. Use a pointed object such as the tip of a pen to press the ACL button. When this has been done, "oP-1" (test run) appears, blinking, in the remote controller clock display area. Step 2: Next, press the 1 HR TIMER button once to change the display from "oP-1" to "oP-3" (self-diagnostics). (The display continues to blink.) Step 3: Finally press the ON/OFF button to engage self-diagnostics mode. • The self-diagnostics function utilizes the 3 indicator lamps on the main unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to report the existence of sensor trouble or a protective operation. (The lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.) Self-diagnostics is completed when the buzzer sounds 3 short beeps. • A maximum of 3 self-diagnostics reports are displayed, for 5 seconds each, beginning with the most recent report. Following this display the lamps turn OFF. In order to view the self-diagnostics results again, press the ON/OFF button again. • The 3 lamps remain OFF if no trouble has occurred. After self-diagnostics is completed, be sure to press the ACL (reset) button to return to normal mode. The air conditioner will not operate if this is not done. After turning on power to the air conditioner, use the remote controller and follow the steps below to execute self-diagnostics. 48

.... OFF Timer Operation Code Diagnostics item Diagnostics contents Since the indications cover various units, the corresponding parts listed below may not be present in some models. S01 Room temperature sensor failure Indoor heat exchanger sensor failure Humidity sensor failure Compressor temperature sensor failure Outdoor heat exchanger sensor failure Outdoor air temperature sensor failure Indoor/outdoor communications failure (serial communications) Outdoor unit external ROM (OTP data) failure Peak current cut-off • HIC circuit failure • Power Tr (transistor) circuit failure PAM circuit failure Active circuit failure Outdoor system communications failure Outdoor high-pressure SW OLR operation Outdoor power supply open phase Outdoor coil freezing Compressor discharge overheat prevention activated. Indoor fan operating failure No-refrigerant protection DC compressor drive circuit failure Outdoor fan operating failure Freeze-prevention operation activated. 4-way valve switching failure Indoor zero-cross failure Outdoor electrical current detection failure S02 S03 S04 S05 S06 S07 E01 E02 E03 E04 E05 E06 E07 E08 E09 E10 E11 E12 E13 .... Blinking .... ON (Illuminated) Quiet (3) (2) (1) (1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location (short-circuit detection only for the humidity sensor) (3) Indoor/outdoor circuit board failure (1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location (3) Outdoor circuit board failure Outdoor circuit board failure (1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power relay failure (5) Indoor or outdoor circuit board failure (1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage (4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation (7) Compressor failure (8) Outdoor circuit board failure (1) External ROM data failure (2) Outdoor circuit board failure (1) Instantaneous power outage (2) HIC or power transistor failure (3) Outdoor circuit board failure (1) Outdoor circuit board failure (2) Outdoor power supply voltage failure (1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant (4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor circuit board failure (1) Fan motor failure (2) Contact failure at connector (3) Indoor circuit board failure (1) 4-way valve failure (heat pump model only) (2) Outdoor circuit board failure (1) Service valve not opened. (2) Shortage of refrigerant (1) Open phase (2) Outdoor circuit board failure (1) Fan motor failure (2) Contact failure at connector (3) Outdoor circuit board failure (1) Mis-wiring (2) Blown fuse (3) Power relay failure (4) Open phase (5) Outdoor circuit board failure (6) Compressor failure (1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation REMOTE CONTROL receiver (1) OPERATION lamp (2) TIMER lamp (3) QUIET lamp ION lamp OPERATION button INDOOR UNIT (1) Self-diagnostics Lamps 49

Check the indoor unit. Is the fuse blown? Replace the controller. Replace the circuit board or the fuse. No indicators illuminate and the indoor fan does not rotate. Check the power voltage. Normal Blown 50

(1) Checking the indoor unit (2) Checking the outdoor unit (3) Checking the serial communications Using the TEST/T-RUN terminals Control No. Check items (unit operation) T-RUN : Test run (compressor and fan motor turn ON). TEST/MV : Compresses time to 1/60th (accelerates operation by 60 times faster than normal). Use the remote controller to operate the unit in "TEST run" mode. To determine whether the mode is currently in "TEST run" mode, check the 3 indicator lamps on the unit. If all 3 are blinking, the current mode is "TEST run." If there are no problems with the above, then check the outdoor unit. 1 The rated voltage must be present between inter-unit wirings 1 and 2. Connect a 5 k ohm resistor between inter-unit wirings 2 and 3. When the voltage at both ends is measured, approximately 12 to 15V DC must be output and the multimeter pointer must bounce once every 8 seconds. Or instead of measuring the voltage, you can insert an LED jig and check that the LED flickers once every 8 seconds. • • Control No. Check items (unit operation) Apply the rated voltage between outdoor unit terminals 1 and 2. If there are no problems with the above, then check the indoor unit. Turn the power OFF before performing short circuiting procedures. Refer to the previous pages when performing system self-diagnostics. So that the check can be made quickly, indicators blink at first communication after power ON. Before performing the above checks, perform “TEST run” operation, and check that the rated voltage is output to terminals 1 and 2 on the outdoor unit. If it is not output, there is a failure related to the indoor unit power. 1 The control panel LED (red) must illuminate. Short-circuit the outdoor unit COM terminal to the T-RUN terminal. 2 The compressor, fan motor, and 4-way valve must all turn on. • • TEST/T-RUN terminals (TEST)/MV T-RUN COM For the "Test run" procedure, refer to 7.4" How to Test Run the Air Conditioner". Probable location of malfunction Indoor unit circuit board failure Outdoor unit circuit board failure Failure (open circuit, contact failure, etc.) in the inter-unit wirings Outdoor unit circuit board failure Short-circuit terminals 2 and 3 on the outdoor unit terminal plate. Short-circuit terminals 2 and 3 on the indoor unit terminal plate. Initial self-diagnostics Control 1 Control 2 .... OFF .... Blinking .... Illuminated Quiet ( 3 ) Timer ( 2 ) Operation ( 1 ) Quiet ( 3 ) Timer ( 2 ) Operation ( 1 ) Quiet ( 3 ) Timer ( 2 ) Operation ( 1 ) 51

Motor rotates for some time (several seconds), but then quickly stops, when the indoor unit operates. (There is trouble in the system that provides feedback of motor rotation speed from the motor to the indoor unit controller.) [Trouble symptom 4] Fan motor rotation speed does not change during indoor unit operation. [Trouble symptom 5] Fan motor rotation speed varies excessively during indoor unit operation. (Remedy for symptom 3 to 5) It is not possible to identify whether the trouble is indoor unit controller trouble or motor trouble. Therefore, first replace the indoor unit controller, then (if necessary) replace the DC motor. 10-4. Trouble Diagnosis of Fan Motor 10-4-1. Indoor Fan Motor This indoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. To perform diagnosis, operate the unit in cooling mode with indoor fan speed "High". Next, make sure that the indoor unit receive the signals from the remote controller when the ON/OFF operation button is pressed. [Trouble symptom 1] The fan does not stop when the unit stops. Indoor unit controller trouble. [Trouble symptom 2] The fan motor does not rotate when the unit is operating. (Diagnostic procedure) * Disconnect the motor connectors and measure the voltage at the DC motor connectors on the indoor unit controller (3 locations). (Diagnostic results) All of the above measured values are normal. Fan motor trouble (Replace the motor.) Any one of the above measured values is not normal. Indoor unit controller trouble (Replace the controller .) (Reference) DC motor connector pin arrangement Pin 1: Vm (red) Pin 2: Not used Pin 3: Gnd (black) Pin 4: Vcc (white) Pin 5: Vs (yellow) Pin 6: PG (blue) Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors. (B) When performing voltage measurement at the indoor controller connector for (3) in the table below, the DC motor will trip and voltage output will stop approximately 1 minute after operation is started. For this reason, to measure the voltage again, turn OFF the unit once using the remote controller, and then start the air conditioner again. (1) Vm-Gnd: Between pin 1 and pin 3 (2) Vcc-Gnd: Between pin 4 and pin 3 (3) Vs-Gnd: Between pin 5 and pin 3 Measurement location DC 230 V or more DC 14 V or more Fluctuation between DC 1.0 to 4.3 V Normal value 52

This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. To perform diagnosis, follow the instructions in "(2) Checking the Outdoor Unit" on the previous page and set the outdoor unit to Test Run mode (compressor ON, outdoor fan motor ON). [Trouble symptom 1] The fan does not stop when the outdoor unit stops. Outdoor unit controller trouble [Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating. (Diagnostic procedure) * Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor unit controller (3 locations). (Diagnostic results) All of the above measured values are normal. Fan motor trouble (Replace the motor.) Any one of the above measured values is not normal. Outdoor unit controller trouble (Replace the controller .) (Reference) DC motor connector pin arrangement Pin 1: Vs (white) Pin 2: Not used Pin 3: Not used Pin 4: Gnd (black) Pin 5: Vcc (red) Pin 6: FG (blue) Pin 7: Vsp (yellow) [Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoor unit operates. (There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller.) [Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation. [Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation. (Remedy for symptom 3 to 5) It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble. Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor. Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors. (B) When performing voltage measurement at the outdoor controller connector for (3) in the table below, the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started. For this reason, to measure the voltage again, first turn OFF the outdoor unit power, then follow the instructions in "Checking the Outdoor Unit" and again set the unit to Test Run mode. (1) Vs-Gnd: Between pin 1 and pin 4 (2) Vcc-Gnd: Between pin 5 and pin 4 (3) Vsp-Gnd: Between pin 7 and pin 4 Measurement location DC 230V or more DC 14V or more After fluctuating 4 times between DC 1.0 to 4.3V (1 sec. ON) and DC 0 V (1 sec. OFF), the DC motor trips. Normal value 53

An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices. A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these effects may still occur. Please pay attention to the points listed below. (1) Noise malfunction This refers to the application of high-frequency noise to the signal wires, resulting in abnormal signal pulses and malfunction. Locations most susceptible to noise 1. Locations near broadcast stations where there are strong electromagnetic waves 2. Locations near amateur radio (short wave) stations 3. Locations near electronic sewing machines and arc-welding machines Correction (The fundamental concept is to make the system less susceptible to noise.) - Insulate for noise or distance from the noise source. - 1. Use shielded wires. 2. Move unit away from the noise source. Trouble Either of the following trouble may occur. 1. The unit may stop suddenly during operation. 2. Indicator lamps may flicker. (2) Electromagnetic interference This refers to noise generated by high-speed switching of the microcomputer and compressor. This noise radiates through space and returns to the electric wiring, affecting any wireless devices (televisions, radios, etc.) located nearby. Locations most susceptible to noise 1. A television or radio is located near the A/C and A/C wiring. 2. The antenna cable for a television or radio is located close to the A/C and A/C wiring. 3. Locations where television and radio signals are weak. Correction 1. Select a separate power source. 2. Keep the A/C and A/C wiring at least 1 meter away from wireless devices and antenna cables. 3. Change the wireless device’s antenna to a high- sensitivity antenna. 4. Change the antenna cable to a BS coaxial cable. 5. Use a noise filter (for the wireless device). 6. Use a signal booster. Trouble 1. Noise appears in the television picture, or the picture is distorted. 2. Static occurs in the radio sound. 54

compressor and other parts 11. CHECKING ELECTRICAL COMPONENTS 11-1. Measurement of Insulation Resistance The insulation is in good condition if the resistance exceeds 1M ohm. 11-1-1. Power Supply Cord Clamp the grounding wire of power cord with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power wires. (Fig. 1) Then also measure the resistance between the grounding and other power terminals. (Fig. 1) 11-1-2. Indoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate. (Fig. 2) Note that the ground line terminal should be skipped for the check. 11-1-3. Outdoor Unit Clamp a metallic part of the unit with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate. (Fig. 2) 11-1-4. Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the desired electric part from terminal plate, capacitor, etc. Similarly disconnect the connector. Then measure the insulation resistance. (Figs. 3 and 4) Refer to Electric Wiring Diagram. If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin. NOTE 55

on PCB Ass'y Remove the PCB Ass'y from the electrical component box. Then pull out the fuse from the PCB Ass'y. (Fig. 5) Check for continuity using a multimeter as shown in Fig. 6. 56

SPECIAL PRECAUTIONS WHEN SERVICING UNIT 12-1. Characteristics of New Refrigerant R410A 12-1-1. What is New Refrigerant R410A? R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22. 12-1-2. Components (mixing proportions) HFC32 (50%) / HFC125 (50%) 12-1-3. Characteristics Less toxic, more chemically stable refrigerant The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover the remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase). When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state. Thus, always charge the refrigerant while it is in liquid phase. Ether-type oil is used for compressor oil for R410A-type units, which is different from the mineral oil used for R22. Thus more attention to moisture prevention and faster replacement work compared with conventional models are required. CAUTION 57

cover the ends of the tubing with caps or tape prior to installation. Never use 0.0276" (0.7 mm)-thick copper tubing or tubing which is less than 0.0315" (0.8 mm) in thickness, since air conditioners with R410A are subject to higher pressure than those using R22 and R407C. No addition of compressor oil for R410A No additional charge of compressor oil is permitted. No use of refrigerant other than R410A Never use a refrigerant other than R410A. If refrigerant R410A is exposed to fire Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be sure to provide ample ventilation during installation work. Caution in case of R410A leak Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room, immediately provide thorough ventilation. A D Flare tool for R410A A D Conventional flare tool (R22) Spacer 12-2. Checklist before Servicing Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of extrusion) by using the flare spacer. Size of flare Specification A Diameter of tube D Dia.1/4" (6.35 mm) Dia.3/8" (9.52 mm) Dia.1/2" (12.7 mm) Dia.5/8" (15.2 mm) Flare tool for R410A Conventional flare tool (for R22) 0 to 0.0196" (0 to 0.5 mm) 0.0472" (1.2 mm) 58

For servicing, use the following tools for R410A Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Refrigerant recovery unit Vacuum pump with anti-reverse flow (*1) (Solenoid valve-installed type, which prevents oil from flowing back into the unit when the power is off, is recommended.) Vacuum pump (*2)...can be used if the following adapter is attached. Vacuum pump adapter (reverse-flow prevention adapter) (*3). (Solenoid valve-installed adapter attached to a conventional vacuum pump.) Electronic scale for charging refrigerant Flare tool Bender Torque wrench Cutter, reamer Welding tool, nitrogen gas cylinder Tools specifically for R410A Tool Distinction Tool Name Tools which can be com- monly used for R22, R407C, and R410A CAUTION The above tools specifically for R410A must not be used for R22 and R407C. Doing so will cause malfunction of the unit. For the above vacuum pump (*1, *2) and vacuum pump adapter (*3), those for R22-type units can be used for R410A-type. However, they must be used exclusively for R410A and never alternately with R22 and R407C. For details on tubing installation procedures, refer to the installation manuals attached to the indoor unit and outdoor unit. To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, shape and external diameter of the service port screw has been altered. R410A : 5/16" R22, R407C : 1/4" 12-4. Tubing Installation Procedures When the tubes are connected, always apply HAB oil on the flare portions to improve the sealing of tubing. The following is the HAB oil generally used: Esso: ZERICE S32 NOTE 59

CAUTION Should the compressor malfunction, be sure to make the switch to a replacement compressor as quickly as possible. Use only the tools indicated exclusively for R410A. See "12-3. Tools Specifically for R410A." 12-5-1. Procedure for Replacing Compressor (1) Recovering refrigerant Any remaining refrigerant inside the unit should not be released to the atmosphere, but recovered using the refrigerant recovery unit for R410A. Do not reuse the recovered refrigerant, since it will contain impurities. (2) Replacing Compressor Soon after removing seals of both discharge and suction tubes of the new compressor, replace it quickly. (3) Checking for sealing Use nitrogen gas for the pressurized gas, and never use a refrigerant other than R410A. Also do not use oxygen or any flammable gas. (4) Evacuation Use a solenoid valve-installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption, the valve will prevent the pump oil from flowing back. The equipment may be damaged if moisture remains in the tubing, thus carry out the evacuation thoroughly. When using a vacuum pump with exhaust air volume more than 0.883 cu.ft./min. and ultimate vacuum pressure rate of 50 micron Hg. Standard time for evacuation (1) Recover refrigerant OK (2) Replace compressor OK (3) Check for sealing OK (4) Evacuation OK (5) Recharge Length of tubing Evacuation time Less than 33 ft. (10 m) More than 10 minutes More than 33 ft. (10 m) More than 15 minutes 60

cylinder in up-side-down position. Single valve (with siphon tube) Charge with cylinder in normal position. Liquid Valve Liquid Charging cylinder Open Refrigerant cylinder Liquid NO! CAUTION Never charge a large amount of liquid refrigerant at once to the unit. This may cause damage to the compressor. CAUTION To prevent the composition of R410A from changing, never bleed the refrigerant gas into the atmosphere while transferring the refrigerant. (Fig. 3) (5) Recharging Be sure to charge the specified amount of refrigerant in liquid state using the service port of the wide tube service valve. The proper amount is listed on the unit's nameplate. When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation. When charging with a refrigerant cylinder, use an electronic scale for charging refrigerant. In this case, if the volume of refrigerant in the cylinder becomes less than 20% of the fully-charged amount, the composition of the refrigerant starts to change. Thus, do not use the refrigerant if the amount in the charging cylinder is less than 20%. Also, charge the minimum necessary amount to the charging cylinder before using it to charge the air conditioning unit. Example: In case of charging refrigerant to a unit requiring 1.68 lb. (0.76 Kg) using a capacity of a 22 lb. (10 Kg) cylinder, the minimum necessary amount for the cylinder is: 1.68 + 22 0.20 = 6.08 lb. (0.76 + 10 0.20 = 2.76 Kg) For the remaining refrigerant, refer to the instructions of the refrigerant manufacturer. If using a charging cylinder, transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder. Prepare an evacuated charging cylinder beforehand. Do not use the refrigerant if the amount in the charging cylinder is less than 20%. Configuration and characteristics of cylinders Fig. 1 Fig. 2 Fig. 3 61

Evacuation time Less than 33 ft. (10 m) More than 10 minutes More than 33 ft. (10 m) More than 15 minutes 12-6. In Case Refrigerant is Leaking CAUTION Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant. (1) Detecting Leaks Use the detector for R410A to locate refrigerant leak points. (2) Recovering refrigerant Never release the gas to the atmosphere; recover residual refrigerant using the refrigerant recovery unit for R410A, instead. Do not reuse the recovered refrigerant because its composition will have been altered. (3) Welding leaking points Confirm again that no residual refrigerant exists in the unit before starting welding. Weld securely using flux and wax for R410A. Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen (N2) in the refrigerant circuit of the unit. Leave ends of tubes open during welding. (4) Checking for sealing Use nitrogen gas for the pressurized gas, and never use a refrigerant other than R410A. Also do not use oxygen or any flammable gas. (5) Evacuation Use a solenoid valve-installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption, the valve will prevent the pump oil from flowing back. The equipment may be damaged if moisture remains in the tubing, thus carry out the evacuation thoroughly. When using a vacuum pump with exhaust air volume more than 0.883 cu.ft./min. and ultimate vacuum pressure rate of 50 micron Hg. Standard time for evacuation (6) Recharging Recharge unit in the same manner explained on the previous page "(5) Recharging." (2) Recover refrigerant OK (3) Weld leaking points OK (4) Check for sealing OK (5) Evacuation OK (6) Recharge (1) Detect leaks OK 62

12-7-1. When Tubes are Extended Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit. Charge additional refrigerant in liquid state only. 12-8. Retro-Fitting Existing Systems 12-8-1. Use of Existing Units Never use new refrigerant R410A for existing units which use R22. This will cause the air conditioner to operate improperly and may result in a hazardous condition. 12-8-2. Use of Existing Tubing If replacing an older unit that used refrigerant R22 with a R410A unit, do not use its existing tubing. Instead, completely new tubing must be used. CAUTION Never charge additional refrigerant if refrigerant is leaking from the unit. Follow instructions given in "12-6. In Case Refrigerant is Leaking" and completely carry out repairs. Only then should you recharge the refrigerant. 63

+ CL1872 KS2472 + C2472 + CL2472 (OI-852-6-4180-800-00-0) APPENDIX 64

are provided below; refer to these descriptions when using the air conditioner. • Microprocessor Controlled Operation The interior compartment of the remote control unit contains several features to facilitate automatic operation, easy logically displayed for easy use. • Simple One-touch Wireless Remote Control The remote control unit has several features to facilitate automatic operation. • 24-Hour ON or OFF Timer This timer can be set to automatically turn the unit on or off at any time within a 24 hour period. • 1-Hour OFF Timer This timer can be set to automatically turn off the unit at any time after one hour. • Night Setback Pressing this button changes the setting of the room temperature thermostat, allowing you to set the temperature at whatever level that you find comfortable. • Automatic and 3-step Fan Speed Auto/High/Medium/Low • Air Sweep Control This function moves a flap up and down in the air outlet, directing air in a sweeping motion around the room and providing comfort in every corner. • Auto. Flap Control This automatically sets the flap to the optimum position during cooling and drying operation. • Automatic Restart Function for Power Failure Even when power failure occurs, preset programmed operation can be reactivated once power resumes. • High Power Operation The unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is 1 step above “High”. • Quiet Operation The fan rotates slower than the fan speed setting to provide a quieter operating sound. • ION Operation While it is operating, the unit generates negative ions that freshen up the air in the room. • Anti-Mold Filter This unit is equipped with an anti-mold filter that inhibits the growth of mold and bacteria. • Air Clean Filter An air filter that eliminates unpleasant odors and cleans the air is available. Purchase a replacement filter at your local dealer. (model STK-FDXB) OI-800-2-EG

Alert Symbols.................................................................................................... 3 Installation Location .......................................................................................... 4 Electrical Requirements.................................................................................... 4 Safety Instructions............................................................................................. 4 Names of Parts ................................................................................................. 5 Using the Remote Control Unit ....................................................................... 10 Operation with the Remote Control Unit ........................................................ 12 1. Operation ............................................................................................... 12 2. Adjusting the Fan Speed........................................................................ 13 3. Fan Only................................................................................................. 13 4. Night Setback Mode............................................................................... 14 5. QUIET Mode.......................................................................................... 15 6. HIGH POWER Mode ............................................................................. 15 7. ION Mode............................................................................................... 15 Special Remarks............................................................................................. 16 Setting the Timer............................................................................................. 17 Using the 1-Hour OFF Timer .......................................................................... 19 Tips for Energy Saving.................................................................................... 19 Adjusting the Airflow Direction ........................................................................ 20 Operation without the Remote Control Unit .................................................... 21 Care and Cleaning.......................................................................................... 21 Troubleshooting............................................................................................... 24 Operating Range............................................................................................. 24 Product Information If you have problems or questions concerning your Air Conditioner, you will need the following information. Model and serial numbers are on the nameplate on the bottom of the cabinet. Model No. ______________________ Serial No. ____________________ Date of purchase ________________________________________________ Dealer’s address ________________________________________________ Phone number ________________ Alert Symbols The following symbols used in this manual, alert you to potentially dangerous conditions to users, service personnel or the appliance: This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death. This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage. CAUTION OI-800-3-EG

installation technicians in accordance with the Installation Instructions provided with the unit. • Before installation, check that the voltage of the electric supply in your home or office is the same as the voltage shown on the nameplate. Electrical Requirements 1. All wiring must conform to the local electrical codes. Consult your dealer or a qualified electrician for details. 2. Each unit must be properly grounded with a ground (or earth) wire or through the supply wiring. 3. Wiring must be done by a qualified electrician. Safety Instructions • Read this Instruction Manual carefully before using this air conditioner. If you still have any difficulties or problems, consult your dealer for help. • This air conditioner is designed to give you comfortable room conditions. Use this only for its intended purpose as described in this Instruction Manual. • Do not install this air conditioner where there are fumes or flammable gases, or in an extremely humid space such as a greenhouse. • Do not install the air conditioner where excessively high heat-generating objects are placed. Avoid: To protect the air conditioner from heavy corrosion, avoid installing the outdoor unit where salty sea water can splash directly onto it or in sulphurous air near a spa. • Never use or store gasoline or other flammable vapor or liquid near the air conditioner — it is very dangerous. • This air conditioner has no ventilator for intaking fresh air from outdoors. You must open doors or windows frequently when you use gas or oil heating appliances in the same room, which consume a lot of oxygen from the air. Otherwise there is a risk of suffocation in an extreme case. • Do not turn the air conditioner on and off from the power mains switch. Use the ON/OFF operation button. • Do not stick anything into the air outlet of the outdoor unit. This is dangerous because the fan is rotating at high speed. • Do not let children play with the air conditioner. • Do not cool the room too much if babies or invalids are present. CAUTION OI-800-4-EG

This illustration is based on the external view of a standard model. Consequently, the shape may differ from that of the air conditioner which you have selected. This air conditioner consists of an indoor unit and an outdoor unit. You can control the air conditioner with the remote control unit. Air Intake Air from the room is drawn into this section and passes through air filters which remove dust. Air Outlet Conditioned air is blown out of the air conditioner through the air outlet. Remote Control Unit The wireless remote control unit controls power ON/OFF, operation mode selection, temperature, fan speed, timer setting, and air sweeping. Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which refrigerant gas flows. Drain Hose Moisture in the room condenses and drains off through this hose. Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat exchanger coil, and other electrical components. INDOOR UNIT Air intakes Remote control unit Air outlet Refrigerant tubes Drain hose OUTDOOR UNIT Air outlet NOTE OI-800-5-EG

REMOTE CONTROL receiver This section picks up infrared signals from the remote control unit (transmitter). OPERATION button When the remote control cannot be used, pressing this button enables cooling operation. Each time this button is pressed, the operation mode changes cyclically. OPERATION lamp This lamp lights when the system is in the continuous DRY (orange), COOL (green) and FAN (green) mode. TIMER lamp This lamp lights when the system is being controlled by the timer. QUIET lamp This lamp lights during operation in the QUIET mode. ION lamp This lamp lights during operation in the ION mode while the indoor unit is operating. The unit’s display lamps are dimmed during operation in the NIGHT SETBACK mode. QUIET REMOTE CONTROL receiver Avoid using radio equipment such as mobile phone near (within 4 ft.) the remote control receiver. Some radio equipment may cause malfunction of the unit. If the trouble happens, disconnect power and restart the air conditioner after a few minutes. IMPORTANT OPERATION lamp TIMER lamp QUIET lamp OPERATION button INDOOR UNIT ION lamp Cooling operation Stop NOTE OI-800-6-EG

(1) Operation mode MILD DRY .............................. COOL..................................... FAN ........................................ (2) Fan speed Automatic operation ............... HIGH ..................................... MEDIUM................................. LOW....................................... (3) Temperature setting 60 – 86 °F When set to 80 °F temperature indication............ (4) Timer 24-hour clock with ON/OFF program Timer........................ ON Timer................................ OFF Timer.............................. 1-hour OFF Timer................... (5) NIGHT SETBACK .................. (6) Confirmation of transmission........................... (7) Auto. fla.dication..................... Flap angle indication .............. Sweep indication.................... (8) High power operation ............. (9) Quiet operation....................... (10) ION operation....................... Displayed when setting timer Displayed when transmitting data Displayed when indoor unit sensor is in use Displayed when setting temperature Displayed when temperature is shown Displayed when the time display is set to 12-hour time. Symbols OI-800-7-EG

The illustration above pictures the remote control unit after the cover has been opened. Transmitter When you press the buttons on the remote control unit, the mark appears in the display to transmit the setting changes to the receiver in the air conditioner. Sensor A temperature sensor inside the remote control unit senses the room temperature. Display Information on the operating conditions is displayed while the remote control unit is switched on. If the unit is turned off, FLAP setting and FAN SPEED setting are not displayed. ION button : This button is for turning the negative ions generated during operation on and off. ON/OFF operation button This button is for turning the air conditioner on and off. 1 HR. TIMER button (1-HOUR OFF TIMER) : When you press this button, regardless of whether the unit is operating or stopping, the unit operates for one hour and then shuts down. Transmitter Sensor (Cover closed) Display FAN SPEED selector button FLAP button ON TIME setting buttons Return button Advance button CANCEL button SENSOR button CLOCK button ACL button ON/OFF operation button 1 HR. TIMER button Temperature setting buttons (TEMP.) MODE selector button Advance button NIGHT SETBACK button HIGH POWER button OFF TIME setting buttons Return button ION button ADDRESS switch Temperature display selector button Time display selector button QUIET button NOTE OI-800-8-EG

Temperature setting buttons (TEMP.) Press the button to increase the set temperature. Press the button to reduce the set temperature. The temperature setting changes by 1 °C or 2 °F each time one of the TEMP. buttons is pressed. QUIET button : When you press this button, the fan rotates slower than the fan speed setting to provide a quieter operating sound. MODE selector button Use this button to select DRY, COOL or FAN mode. (DRY) : The air conditioner reduces the humidity in the room. (COOL) : The air conditioner makes the room cooler. (FAN) : The air conditioner works only as a circulation fan. FAN SPEED selector button : The air conditioner automatically decides the fan speeds. : High fan speed : Medium fan speed : Low fan speed NIGHT SETBACK button For details, see “4. Night Setback Mode”. When you press this button in the DRY or COOL mode, the mark appears in the display, and the remote control unit will automatically adjust the set temperature to save energy. FLAP button Press this button either to select the setting of the airflow direction to the auto. flap in each mode or one of the six possible positions manually or to select the sweep function which moves the flap up and down automatically. : Auto flap setting: If selected in a cooling or dry operation, the flap is set at position (7) in the following chart. : The airflow direction can be set manually. (six positions) : The flap moves up and down automatically. When you press the FLAP button, the air flow direction will be changed one by one as follows. HIGH POWER button : If this button is pressed during DRY, COOL or FAN operation, the unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is 1 step above “High”. ON TIME/OFF TIME setting buttons No display: The timer does not operate. : The air conditioner starts at the set time. : The air conditioner stops at the set time. : The air conditioner stops and starts, or starts and stops, at the set times every day. For details, see “Setting the Timer”. NOTE SWEEP OI-800-9-EG

Using the Remote Control Unit SENSOR button When you press this button (use a small-tipped object such as a ballpoint pen), the mark will appear at the display. And the room temperature is detected by the sensor which is built into the indoor unit and the air conditioner is controlled accordingly. If the remote control is located near a heat source, such as a space heater or in direct sunlight, press the SENSOR button to switch to the sensor on the indoor unit. Temperature Display Selector button This switches the temperature display between °C and °F. Time Display Selector button This switches the time display between 24-hour time and 12-hour time. ACL button (ALL CLEAR) Puts the remote control unit into pre-operation status. Always press this button after replacing the batteries. ADDRESS switch • The address switch changes to prevent mixing of signals from remote control units when two air conditioners are installed next to each other. Normally, the address switch is set to A. For more information, please contact the dealer where you made the purchase. • Normally, the tabs on the remote control unit should not be bent. The remote control unit sends the temperature signal to the air conditioner regularly at five minute intervals. If the signal from the remote control unit stops for more than 15 minutes due to the loss of the remote control unit or other trouble, the air conditioner will switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the temperature around the remote control unit may differ from the temperature detected at the air conditioner’s position. How to Install Batteries • The batteries last about six months, depending on how much you use the remote control unit. Replace the batteries when the remote control unit’s display fails to light, or when the remote control cannot be used to change the air conditioner’s settings. • Use two fresh leak-proof type-AAA alkaline batteries. • In replacing batteries, follow the instructions as mentioned in the sub- section “How to Install Batteries”. • If you do not use the remote control unit more than 1 month, take out the batteries. NOTE NOTE 1. Slide the cover in the direction indicated by the arrow and remove it. 2. Install two AAA alkaline batteries. Make sure the batteries point in the direction marked in the battery compartment. 3. Use a thin object such as the tip of a pen to press the ACL button. ACL button NOTE OI-800-10-EG

How to Use the Remote Control Unit When using the remote control unit, always point the unit’s transmitter head directly at the air conditioner’s receiver. Remote Control Unit Installation Position The remote control unit may be operated either from a non-fixed position or from a wall-mounted position. To ensure that the air conditioner operates correctly, DO NOT install the remote control unit in the following places: DO NOT • In direct sunlight • Behind a curtain or other places where it is covered • More than 26 feet (8 m) away from the air conditioner • In the path of the air conditioner’s airstream • Where it may become extremely hot or cold • Where it may be subject to electrical or magnetic noise • Where there is an obstacle between the remote control unit and air conditioner (since a check signal is sent from the remote control unit every 5 minutes) Mounting the Remote Control Unit Before mounting the remote control unit, press the ON/OFF operation button at the mounting location to make sure that the air conditioner operates from that location. The indoor unit should make a beeping sound to indicate that it has received the signal. To take out the remote control unit, pull it forward. When Holding the Remote Control Unit • When using the remote control unit and during air conditioner operation, the transmitter on the remote control unit should be pointed toward the receiver on the indoor unit. • Make sure that there are no objects between the remote control unit and receiver which could block the signal. Air conditioner (Indoor unit) Receiver Remote control unit (Transmitter head) Remote control unit mount Mounting screws 5/32 x 5/8" (4 x 16 mm) (included) Rear side Hole • To prevent loss of the remote control unit, you can connect the remote control unit to the mount by passing a string through the remote control unit and attachment hole. Press Set in place OI-800-11-EG

Unit 1. Operation Check that the circuit breaker on the power panel is turned on. Press the setting buttons as described below and change the settings as desired. STEP 1 Press the MODE selector button and select the desired mode. For dehumidifying operation → For cooling operation → For fan only operation → STEP 2 To start the air conditioner, press the ON/OFF operation button. STEP 3 Press the TEMP. setting buttons to change the temperature setting to the desired temperature. Adjustable temperature range: STEP 4 Set the FAN SPEED selector button to the setting you want. STEP 5 Press the FLAP button and set the airflow direction as desired. (Refer to “Adjusting the Airflow Direction” on page 20.) To stop the air conditioner, press the ON/OFF operation button again. STEP 2 STEP 1 STEP 3 STEP 4 STEP 5 NOTE 30 °C max. 16 °C min. or 86 °F max. 60 °F min. OI-800-12-EG

• Choose the best position in the room for the remote control unit, which also acts as the sensor for room comfort and transmits the operating instructions. Once you’ve found this best position, always keep the remote control unit there. • This appliance has a built-in 5-minute time delay circuit to ensure reliable operation. When the operation button is pressed, the compressor will start running within three minutes. In the event of power failure, the unit will stop. 2. Adjusting the Fan Speed A. Automatic fan speed Simply set the FAN SPEED selector button to the position. This automatically sets the best fan speed for the room temperature. B. Manual fan speed If you want to adjust fan speed manually during operation, just set the FAN SPEED selector button as desired. [ , , or ] 3. Fan Only If you want to circulate air without any temperature control, follow these steps: STEP 1 Press the MODE selector button to switch to the fan mode . STEP 2 Press the ON/OFF operation button. STEP 3 Press the FAN SPEED selector button to select the fan speed of your choice ( , or ). NOTE STEP 2 STEP 1 STEP 3 OI-800-13-EG

4. Night Setback Mode Night Setback Mode is used for saving energy. Press the NIGHT SETBACK button while operation. The mark appears in the display. To release the night setback function, press the NIGHT SETBACK button again. In Cooling and DRY Mode: ( and ) When the night setback mode is selected, the air conditioner automatically raises the temperature setting 2 °F when 30 minutes have passed after the selection was made, and then another 2 °F after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected. This enables you to save energy without sacrificing comfort. This function is convenient when gentle cooling is needed. Setting temperature Press the NIGHT SETBACK button 30 min. 30 min. Time 2 °F 2 °F OI-800-14-EG

5. QUIET Mode QUIET Mode is used to reduce the fan sound of the indoor unit. Press the QUIET button. The mark appears in the display. To cancel, press QUIET button again. • In QUIET Mode, the fan rotates at a slower speed than the fan speed setting. • If the unit is already operating with a very low airflow, the fan sound may not change even if the QUIET button is pressed. 6. HIGH POWER Mode HIGH POWER mode can be used to increase the output of the indoor unit for all operation modes. Press the HIGH POWER button. The mark appears in the display. To cancel, press HIGH POWER button again. • When the HIGH POWER button is pressed, the unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is 1 step above “High”. • QUIET Mode and HIGH POWER Mode cannot be used at the same time. 7. ION Mode The ION mode is used during operation to generate negative ions that freshen up the air in the room. Press the ION button. The mark appears in the display. To cancel, press ION button again. • The indoor unit’s ION lamp lights up while negative ions are being generated. • ION “on” is the remote control unit’s initial setting. • The negative ions are generated from the negative ion generator. • Depending on the operating conditions, the fan speed may be increased by a small amount only. NOTE OI-800-15-EG

• Once the room temperature reaches the level that was set, the unit’s operation frequency is changed automatically. • During DRY operation, the fan speed automatically runs at lower speed for providing a comfortable breeze. • ‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F or less. • Sometimes the indoor unit may not get to the set fan speed such as LOW and QUIET under cool operation at very low outdoor temperatures due to the indoor unit being protected from ice or frost when combined with the outdoor unit for Low Ambient Cooling models. • In the event of power failure, the unit will stop. When the power is resumed, the unit will restart automatically within five minutes by the remote control unit. Clicking sound is heard from the air conditioner • In cooling operation, any plastic parts may shrink due to a sudden temperature change. In this event, a clicking sound may occur. This is normal, and the sound will soon disappear. • The remote control unit sends the setting condition to the air conditioner regularly at five minute intervals. ‘‘DRY’’ ( ) Operation Cooling ( ) Operation Power failure during operation Clicking Sound Remote Control Unit OI-800-16-EG

In the descriptions below, the following settings are used for the temperature and time indicator selector button on the bottom front section of the remote control. • Temperature: °F • Time: AM, PM 1. How to set the present time (Example) To set to 10:30 pm. 2. How to set the OFF time (Example) To stop the air conditioner at 11:00 am. NOTE Operation Indication 1. Press the CLOCK button once if the time indicator is not flashing. The time indication alone flashes. 2. Press the Advance, Return ( , ) button until PM 10:30 is displayed. The time can be set in 1-minute increments. Holding down the button advances the time rapidly in 10-minute increments. 3. Press the CLOCK button again. This completes the setting of the current time. 1. Press the OFF TIME setting button once. The timer indication is displayed, and the present OFF time is shown. 2. Press the Advance, Return ( , ) button until AM 11:00 is displayed. The timer indication blinks. The time can be set in 10-minute increments. Holding down the button advances the time rapidly in 10-minute increments. 3. Wait a few seconds, and then the setting is complete. The timer indication stops blinking and the present time is displayed. OI-800-17-EG

3. How to set the ON time (Example) To start operation at 7:10 am. 4. How to set DAILY ON/OFF REPEAT timer (Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am. To cancel a timer program • Press the CANCEL button. • When either an ON or OFF timer is to be canceled, press the button corresponding to the timer whose program is to be canceled, and then press the CANCEL button. • The airflow direction, fan speed and temperature setting can be changed after a timer program has been set even when the unit is stopped. Even when operation is stopped during an ON timer program, the unit will start operating when the set time is reached provided that the program is not canceled. • When the ON timer and OFF timer are set to the same time, the timer operates as if it is turned off. Operation Indication 1. Press the ON TIME setting button once. The timer indication is displayed, and the present ON time is shown. 2. Press the Advance, Return ( , ) button until AM 7:10 is displayed. The timer indication blinks. The time can be set in 10-minute increments. Holding down the button advances the time rapidly in 10-minute increments. 3. Wait a few seconds, and then the setting is complete. The timer indication stops blinking and the present time is displayed. 7:10 am. ON 11:00 am. OFF 10:30 pm. Present time 1. Set the timer ON/OFF times as shown in 2-1, 2, 3 and 3-1, 2, 3. The present time 10:30 pm. and are displayed. • The ON/OFF combination timer uses the current time as the reference, and it is activated starting from whichever set time comes first. • With the ON/OFF combination timer, the settings are repeated every day. • You can check the timer ON/OFF times after you have set them by pressing the ON TIME and OFF TIME setting buttons. NOTE NOTE OI-800-18-EG

Tips for Energy Saving 1. 1-Hour OFF Timer This function causes the unit to operate for one hour and then stop, regardless of whether the unit is on or off when this button is pressed. The indicator in the display indicates that this function is operating. Setting procedure: Regardless of whether the unit is operating or stopped, press the 1 HR. TIMER button. appears in the display. Cancellation procedure: Press the ON/OFF operation button to turn the unit off, wait for the unit to stop operating, and then press the ON/OFF operation button again. The 1-Hour Timer function is now cancelled and the unit operates normally. • If, while the 1-Hour Timer function is operating, the 1HR. TIMER button is pressed once to cancel the function and then again, the unit continues to operate for one hour from that point in time and then stops. • It is not possible to use the OFF Timer and 1-Hour OFF Timer together. Whichever function is set last takes precedence. If the 1 HR. TIMER button is pressed while the TIMER OFF function operates, the OFF Timer is cancelled and the unit will stop operating one hour later. 2. Operation together with the DAILY ON/OFF REPEAT Timer The 1-Hour OFF Timer setting is given priority over the DAILY ON/OFF REPEAT setting. Do not • Block the air intake and outlet of the unit. If they are obstructed, the unit will not work well, and may be damaged. • Let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls and ceiling of the room are warmed by the sun, it will take longer to cool the room. Do • Always try to keep the air filter clean. (Refer to “Care and Cleaning”.) A clogged filter will impair the performance of the unit. • To prevent conditioned air from escaping, keep windows, doors and any other openings closed. NOTE OI-800-19-EG

1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with your hands to the left or right. When the humidity is high, the vertical vanes should be in the front position during the cooling or dehumidifying operation. If the vertical vanes are positioned all of the way to the right or left, condensation may begin to form around the air vent and drip down. 2. Vertical The vertical airflow can be adjusted by moving the flap with the remote control unit. Do not move the flap with your hands. Confirm that the remote control unit has been turned on. Use the FLAP button to set either the sweep function or one of the six airflow direction settings. • The flap automatically closes when the unit is off. • Use the FLAP button on the remote control to adjust the position of the flap. If you move the flap by hand, the flap position according to the remote control and the actual flap position may no longer match. If this should happen, shut off the unit, wait for the flap to close, and then turn on the unit again; the flap position will now be normal again. • Do not have the flap pointed down during cooling operation. Condensation may begin to form around the air vent and drip down. CAUTION A. Sweep function The flap starts moving up and down to deliver air over the sweep range. C. Auto flap function The flap is set to the recommended position. B. Setting the airflow manually Referring to the above illustration, use the FLAP button to set the airflow direction within the range used during the cooling or dehumidifying operation. COOL DRY FAN SWEEP NOTE CAUTION OI-800-20-EG

Control Unit Care and Cleaning INDOOR UNIT If you have lost the remote control unit or it has trouble, follow the steps below. When the air conditioner is not running Each time the OPERATION button is pressed, the operation mode changes cyclically. The temperature is set to the room temperature minus 4 °F during the cooling operation, and the fan speed and flap are set to Auto. 1. For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning. 2. Do not pour water on the indoor unit to clean it. This will damage the internal components and cause an electric shock hazard. Casing and Grille (Indoor Unit) Clean the casing and grille of the indoor unit with a vacuum cleaner brush, or wipe them with a clean, soft cloth. If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When cleaning the grille, be careful not to force the vanes out of place. 1. Never use solvents, or harsh chemicals when cleaning the indoor unit. Do not wipe the plastic casing using very hot water. 2. Some metal edges and the fins are sharp and may cause injury if handled improperly; be especially careful when you clean these parts. 3. The internal coil and other components of the outdoor unit must be cleaned every year. Consult your dealer or service center. OPERATION button Cooling operation Stop NOTE CAUTION OI-800-21-EG

Anti-Mold Filter The anti-mold filter behind the air intake grille should be checked and cleaned at least once every two weeks. How to remove the anti-mold filter 1. Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you. 2. Remove the anti-mold filter attached to the rear of the air intake grille. Cleaning Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter, wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it. How to replace the anti-mold filter 1. With the FRONT mark of the anti-mold filter at the front, align the two indentions near the mark with the hooks at the rear of the air intake grille, and then mount the anti-mold filter. 2. Allow the edge of the air intake grille to slide into the top of the indoor unit, and then insert it all the way inside. 3. To attach the air intake grille to the indoor unit, press its bottom right and left corners as well as its bottom center into place. Attach so that the round pins at the top right and left corners of the air intake grille are inserted into the grooves at the top right and left of the indoor unit. Air intake grille Anti-mold filter Anti-mold filter FRONT mark Hook Air intake grille Groove Pin Air intake grille NOTE OI-800-22-EG

Air Clean Filter The air clean filter removes dust and dirt from the air, and reduces odors and smoke from tobacco. This air clean filter cannot remove harmful gases or vapors nor ventilate air in the room. You must open doors or windows frequently when you use gas or oil heating appliances. Otherwise there is a risk of suffocation in extreme cases. How to install the air clean filter The air clean filter needs to be installed behind the air intake grille. 1. Remove the air intake grille. 2. Install the air clean filter in the position shown in the figure. 3. Remount the air intake grille. How to clean the air clean filter • In general, the filter should be sucked to remove dust in low fan speed of a vacuum cleaner once every three months. • If there is heavily grime on the filter, soak the filter in lukewarm water with neutral detergent diluted 1:500 for 1 to 2 minutes then wash it. • Rinse the filter in clean water, then let it dry on the towel in room temperature. • Do not bend nor give excessive force onto the air clean filter. • If the filter surface is heavily blocked with dirt or damaged, replace it with new one. Purchase a replacement filter at your local dealer. (model STK-FDXB) Cleaning the main unit and remote control unit • Wipe clean using a soft, dry cloth. • To remove stubborn dirt, moisten a cloth in warm water no hotter than 104 °F, wring thoroughly, and then wipe. • The air intake grille can be removed in order to wash it with water. Removing and remounting the air intake grille Refer to “How to remove the anti-mold filter” and “How to replace the anti-mold filter” on page 22. When using a footstool or the like, be careful not to let it tip over. Washing the grille with water • Clean the grille gently using a soft sponge, or the like. Then wipe away any remaining moisture. • Neutral detergent may be used to remove stubborn dirt. Then rinse thoroughly with water and wipe away any remaining moisture. Cleaning the negative ion generator Follow the steps below when the generator has become dirty. For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning. Remove the dust on the negative ion generator. • Use a toothbrush, etc. to dust off the end. • Use a cotton swab, etc., to clean around the generator inside the plastic case, taking care not to touch the electrodes. • During use, the negative ion generator and other metal parts may become discolored: this is normal and not indicative of malfunctioning. • If the dirt on and around the negative ion generator is left to build up, a puffing or sputtering sound will eventually be heard. In this case, clean the generator immediately. • Do not apply excessive force while performing maintenance. Air clean filter NOTE CAUTION Negative ion generator (metal electrodes inside plastic case) NOTE OI-800-23-EG

work properly, contact your dealer or service center. Operating Range The air conditioner is operable within the temperature ranges as listed below: For Cooling Only Models : C1872, C2472 For Low Ambient Cooling Models : CL1872, CL2472 Trouble Possible Cause Remedy Air conditioner does not run at all. 1. Power failure. 1. Restore power. 2. Leakage circuit breaker tripped. 2. Contact service center. 3. Line voltage is too low. 3. Consult your electrician or dealer. 4. Batteries in remote control unit have run down. 4. Replace batteries. OPERATION lamp blinks and air conditioner does not operate. Trouble in system. Contact service center. Compressor runs but soon stops. Obstruction in front of condenser coil. Remove obstruction. Poor cooling performance. 1. Dirty or clogged air filter. 1. Clean air filter to improve airflow. 2. Heat source or many people in room. 2. Eliminate heat source if possible. 3. Doors and/or windows are open. 3. Shut them to keep the heat out. 4. Obstacle near air intake or air discharge port. 4. Remove it to ensure good airflow. 5. Thermostat is set too high for cooling. 5. Set the temperature lower. Clicking sound is heard from the air conditioner. In cooling operation, any plastic parts may shrink due to a sudden temperature change. In this event, a clicking sound may occur. This is normal, and the sound will soon disappear. OPERATION lamp lights but outdoor unit will not run. 1. The use of cellular phones near the air conditioner may cause disturbance to its normal operation. 1. Turn off the power then restart the air conditioner after a while. 2. Consult your dealer. Temperature Indoor air temperature Outdoor air temperature COOLING Max. 95 °F DB / 71 °F WB 115 °F DB Min. 67 °F DB / 57 °F WB 67 °F DB Temperature Indoor air temperature Outdoor air temperature COOLING Max. 95 °F DB / 71 °F WB 115 °F DB Min. 67 °F DB / 57 °F WB 0 °F DB OI-800-24-EG

SANYO Fisher Service Company A Division of SANYO North America Corporation 1165 Allgood Road, Suite 22, Marietta, GA 30062 U.S.A. Sanyo Canada Inc. 1-300 Applewood Crescent, Concord, Ontario L4K 5C7, CANADA Jan./2006 (T)