Hitachi RAS-18FH6 Service Manual

ROOM AIR CONDITIONER INDOOR UNIT + OUTDOOR UNIT FEBRUARY 2008 Hitachi Household Appliances(Wuhu) Co.,Ltd. SERVICE MANUAL AW REFER TO THE FOUNDATION MANUAL TECHNICAL INFORMATION FOR SERVICE PERSONNEL ONLY (W) (A) (kW) (B.T.U./h) (W) (A) (kW) (B.T.U./h) W H D (kg) RAS-18FH6 RAC-18YH6 DC INVERTER (WALL TYPE) TYPE MODEL POWER SOURCE TOTAL INPUT TOTAL AMPERES CAPACITY TOTAL INPUT TOTAL AMP ...

First, I must disconnect the power cord plug from the power outlet. 1. In order to disassemble and repair the unit in question, be sure to disconnect the power cord plug from the power outlet before starting the work. 2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and the replacement must be effected in correct manner according to the instructions in the Service Manu ...

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned). 2. Object parts (1) Micro computer (2) Integrated circuits (IC) (3) Field-effect transistors (FET) (4) P.C. boards or the like ...

(6)Use a three wire type soldering iron including a grounding wire. Use a high insulation mode (100V, 10M or higher) when ordinary iron is to be used. (7) In checking circuits for maintenance, inspection or some others, be careful not to have the test probes of the measuring instrument shortcircuit a load circuit or the like. Bare copper wire (for body earth) Working table Resistor of 1 M (1/2W) Earth wire Fig. 3 Grounding of the working table M ...

1. In quiet operation or stopping the running, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation. 2. When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety. 3. The room air conditioner does not start automatically after recovery of the electric power failure for prevent- ing fuse blow ...

SPECIFICATIONS MODEL FAN MOTOR FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR NOISE SUPPRESSOR THERMOSTAT REMOTE CONTROL SWITCH (LIQUID CRYSTAL) 40 W NO NO NO ASC092CD YES YES 3.0A G4A NO NO YES NO 450NR YES YES(IC) NO WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE. UNIT P ...

RAS_AW_001-014en 10/25/06, 10:15 AM 5 – 2 – SAFETY PRECAUTION • Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. • Pay special attention to signs of “ Warning” and “ Caution”. The “Warning” section contains matters which, if not observed strictly, may cause death or serious injury. The “Caution” section contains matters which may result in serious consequenc ...

RAS_AW_001-014en 2008.1.29, 9:39 6 – 4 – NAMES AND FUNCTIONS OF EACH PART INDOOR UNIT Air filter To prevent dust from coming into the indoor unit. (Refer page 16) Front panel Indoor unit indicators Light indicator showing the operating condition. (Refer page 5) Horizontal deflector Vertical deflector (Air Outlet) (Refer page 15) Remote controller Send out operation signal to the indoor unit. So as to operate the whole unit. (Refer page 6) MOD ...

RAS_AW_001-014en 2008.1.29, 9:39 7 – 6 – G Signal emitting window/transmission sign Point this window toward the indoor unit when controlling it. The transmission sign blinks when a signal is sent. G Display This indicates the room temperature selected, current time, timer status, function and intensity of circulation selected. G START/STOP button Press this button to start operation. Press it again to stop operation. G AUTO SWING button Cont ...

RAS_AW_001-014en 2008.1.29, 9:39 8 – 8 – Press the (START/STOP) button. Heating operation starts with a beep. Press the button again to stop operation. START STOP HEATING OPERATION • Use the device for heating when the outdoor temperature is under 21°C. When it is too warm (over 21°C), the heating function may not work in order to protect the device. • In order to keep reliability of the device, please use this device above -15°C of t ...

RAS_AW_001-014en 2008.1.29, 9:39 9 – 10 – Press the (START/STOP) button. Cooling operation starts with a beep. Press the button again to stop operation. The cooling function does not start if the temperature setting is higher than the current room temperature (even though the (OPERATION) lamp lights). The cooling function will start as soon as you set the temperature below the current room temperature. START STOP COOLING OPERATION Use the d ...

RAS_AW_001-014en 2008.1.29, 9:39 10 – 12 – HOW TO SET THE TIMER Time TIME (current time) OFF TIMER ON TIMER RESERVE CANCEL OFF-Timer ON-Timer ON/OFF-Timer After you change the batteries; Start Stop You can set the device to turn off at the present time. 1 Press the (OFF-TIMER) button. The (OFF) mark blinks on the display. The device will turn on at the designated times. 1 Press the (ON-TIMER) button. The (ON) mark blinks on the display. ...

RAS_AW_001-014en 2008.1.29, 9:39 11 – 14 – HOW TO SET THE SLEEP TIMER Set the current time at first if it is not set before (see the pages for setting the current time). Press the (SLEEP) button and the display changes as shown below. GSLEEP Mode Indication Sleep Timer 1 hour 2 hours 3 hours 7 hours Sleep timer off Sleep Timer: The device will continue working for the desired number of hours and then turn off. Point the signal window of the ...

RAS_AW_001-014en 2008.1.29, 9:39 12 – 16 – MAINTENANCE Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply. CAUTION 1. AIR FILTER When the filter indicator lamp comes on, be sure to clean the filter. By doing so, the power rates are saved. In case the air filter is full of dust, the air flow will decrease and the cooling capacity will be reduced. ...

RAS_AW_001-014en 2008.1.29, 9:39 13 – 18 – INFORMATION CAPABILITIES Heating Capability • This room air conditioner utilizes a heat pump system that absorbs exterior heat and brings it into a room to be heated. As the ambient temperature gets lower, heating capability will also lower. In such a situation, the inverter work to increase compressor rpm to keep the unit’s heating capability from decreasing. If the unit’s heating perfor- man ...

RAS_AW_001-014en 10/25/06, 10:15 AM 14 – 20 – • If the unit still fails to operate normally after performing the above inspections, turn the circuit breaker off, or pull the power plug out, and contact your sales agent immediately. Contact your sales agent immediately if the following phenomena should occur: • The circuit breaker switches off or the fuse blows frequently. • The switch operation is not stable. • Foreign matter or wate ...

CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS-18FH6, RAS-25FH6 INDOOR UNIT RAS_AW_015-018e 2008.1.28, 16:03 15 ...

CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-18YH6, RAC-25YH6 OUTDOOR UNIT RAS_AW_015-018e 11/17/06, 11:18 AM 16 ...

MAIN PARTS COMPONENT THERMOSTAT Thermostat Specifications FAN MOTOR MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT Fan Motor Specifications CONNECTION TEMPERATURE °C (°F) INDICATION 16 INDICATION 24 INDICATION 32 MODEL RAS-18FH6, RAS-25FH6 THERMOSTAT MODEL IC OPERATION MODE COOL HEAT ON 16.7 (62.1) 18.7 (65.7) OFF 16.0 (60.8) 19.3 (66.7) ON 24.7 (76.5) 26.7 (80.1) OFF 24.0 (75.2) 27.3 (81.1) ON 32.7 (90.9) 34.7 (94.5) OFF 32.0 (89.6) 35.3 (95.5) M ...

WHITE COMPRESSOR YELLOW RED FRONT SIDE OF OUTDOOR UNIT MODEL ITEM COMPRESSOR TYPE POWER SOURCE OUTPUT COMPRESSOR MOTOR Compressor Motor Specifications WINDING 20°C 75°C RESISTANCE (Ω) ! CAUTION When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant, check the color of the refrigerating machine oil inside the compressor. If the color has been changed conspicuou ...