Daikin R32 Split Series Installer's Reference Manual

R32 split series RXF50B2V1B RXF60B2V1B RXF71A2V1B ARXF50A2V1B ARXF60A2V1B ARXF71A2V1B RXP50M2V1B RXP60M2V1B RXP71M2V1B ARXM50R2V1B ARXM60R2V1B ARXM71R2V1B RXM42R2V1B RXM50R2V1B RXM60R2V1B RXM71R2V1B RXJ50N2V1B RXA42B2V1B RXA50B2V1B

Installer reference guide 2 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 Table of contents 1 About the documentation 4 1.1 About this document ...................................................................................................................................................... 4 2 General safety precautions 5 2.1 About the documentation .............................................................................................................................................. 5 2.1.1 Meaning of warnings and symbols ................................................................................................................ 5 2.2 For the installer............................................................................................................................................................... 6 2.2.1 General ........................................................................................................................................................... 6 2.2.2 Installation site ............................................................................................................................................... 7 2.2.3 Refrigerant — in case of R410A or R32.......................................................................................................... 11 2.2.4 Brine................................................................................................................................................................ 12 2.2.5 Water.............................................................................................................................................................. 13 2.2.6 Electrical ......................................................................................................................................................... 13 3 Specific installer safety instructions 16 4 About the box 22 4.1 Overview: About the box................................................................................................................................................ 22 4.2 Outdoor unit ................................................................................................................................................................... 22 4.2.1 To unpack the outdoor unit ........................................................................................................................... 22 4.2.2 To remove the accessories from the outdoor unit........................................................................................ 23 5 About the unit 25 5.1 Overview: About the unit ............................................................................................................................................... 25 5.2 Identification................................................................................................................................................................... 25 5.2.1 Identification label: Outdoor unit .................................................................................................................. 25 6 Unit installation 26 6.1 Preparing the installation site......................................................................................................................................... 26 6.1.1 Installation site requirements of the outdoor unit........................................................................................ 27 6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 29 6.2 Opening and closing the unit.......................................................................................................................................... 30 6.2.1 About opening the units................................................................................................................................. 30 6.2.2 To open the outdoor unit............................................................................................................................... 30 6.2.3 To close the outdoor unit............................................................................................................................... 30 6.3 Mounting the outdoor unit............................................................................................................................................. 31 6.3.1 About mounting the outdoor unit ................................................................................................................. 31 6.3.2 Precautions when mounting the outdoor unit.............................................................................................. 31 6.3.3 To provide the installation structure ............................................................................................................. 31 6.3.4 To install the outdoor unit ............................................................................................................................. 32 6.3.5 To provide drainage........................................................................................................................................ 32 6.3.6 To prevent the outdoor unit from falling over .............................................................................................. 33 7 Piping installation 35 7.1 Preparing refrigerant piping ........................................................................................................................................... 35 7.1.1 Refrigerant piping requirements.................................................................................................................... 35 7.1.2 Refrigerant piping insulation.......................................................................................................................... 36 7.1.3 Refrigerant piping length and height difference ........................................................................................... 36 7.2 Connecting the refrigerant piping.................................................................................................................................. 36 7.2.1 About connecting the refrigerant piping ....................................................................................................... 37 7.2.2 Precautions when connecting the refrigerant piping.................................................................................... 37 7.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 38 7.2.4 Pipe bending guidelines ................................................................................................................................. 39 7.2.5 To flare the pipe end ...................................................................................................................................... 39 7.2.6 Using the stop valve and service port............................................................................................................ 40 7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 41 7.3 Checking the refrigerant piping...................................................................................................................................... 42 7.3.1 About checking the refrigerant piping........................................................................................................... 42 7.3.2 Precautions when checking the refrigerant piping........................................................................................ 42 7.3.3 To check for leaks........................................................................................................................................... 43 7.3.4 To perform vacuum drying............................................................................................................................. 43 8 Charging refrigerant 45 8.1 About charging refrigerant ............................................................................................................................................. 45 8.2 About the refrigerant...................................................................................................................................................... 46 8.3 Precautions when charging refrigerant.......................................................................................................................... 47 8.4 To determine the additional refrigerant amount .......................................................................................................... 47

Installer reference guide 3 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 8.5 To determine the complete recharge amount .............................................................................................................. 47 8.6 To charge additional refrigerant..................................................................................................................................... 47 8.7 To fix the fluorinated greenhouse gases label ............................................................................................................... 48 9 Electrical installation 49 9.1 About connecting the electrical wiring .......................................................................................................................... 49 9.1.1 Precautions when connecting the electrical wiring....................................................................................... 49 9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 51 9.1.3 Specifications of standard wiring components.............................................................................................. 52 9.2 To connect the electrical wiring to the outdoor unit..................................................................................................... 53 10 Finishing the outdoor unit installation 55 10.1 To finish the outdoor unit installation............................................................................................................................ 55 10.2 To close the outdoor unit ............................................................................................................................................... 55 11 Configuration 56 11.1 Facility setting ................................................................................................................................................................. 56 11.1.1 To set the facility mode.................................................................................................................................. 56 11.2 Standby electricity saving function................................................................................................................................. 56 11.2.1 About the standby electricity saving function............................................................................................... 56 11.2.2 To turn on standby electricity saving function .............................................................................................. 57 12 Commissioning 58 12.1 Precautions when commissioning.................................................................................................................................. 58 12.2 Checklist before commissioning..................................................................................................................................... 58 12.3 Checklist during commissioning ..................................................................................................................................... 59 12.4 To perform a test run...................................................................................................................................................... 59 12.5 Starting up the outdoor unit........................................................................................................................................... 60 13 Hand-over to the user 61 14 Maintenance and service 62 14.1 Overview: Maintenance and service.............................................................................................................................. 62 14.2 Maintenance safety precautions.................................................................................................................................... 62 14.3 Checklist for yearly maintenance of the outdoor unit................................................................................................... 62 14.4 About the compressor.................................................................................................................................................... 63 15 Troubleshooting 64 15.1 Overview: Troubleshooting ............................................................................................................................................ 64 15.2 Precautions when troubleshooting ................................................................................................................................ 64 15.3 Solving problems based on symptoms........................................................................................................................... 64 15.3.1 Symptom: Indoor units fall, vibrate or make noise ....................................................................................... 64 15.3.2 Symptom: The unit is NOT heating or cooling as expected........................................................................... 65 15.3.3 Symptom: Water leakage............................................................................................................................... 65 15.3.4 Symptom: Electrical leakage .......................................................................................................................... 65 15.3.5 Symptom: Unit does NOT function or burn damage..................................................................................... 65 15.4 Fault diagnosis using LED on outdoor unit PCB.............................................................................................................. 65 16 Disposal 66 16.1 Overview: Disposal.......................................................................................................................................................... 66 16.2 To pump down................................................................................................................................................................ 66 16.3 To start and stop forced cooling..................................................................................................................................... 67 16.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch ....................................................... 67 16.3.2 To start and stop forced cooling using the indoor unit user interface ......................................................... 67 17 Technical data 68 17.1 Wiring diagram................................................................................................................................................................ 68 17.1.1 Unified wiring diagram legend....................................................................................................................... 68 17.2 Piping diagram ................................................................................................................................................................ 71 17.2.1 Piping diagram: Outdoor unit......................................................................................................................... 71 18 Glossary 75

Installer reference guide 4 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 1 About the documentation 1.1 About this document INFORMATION Make sure that the user has the printed documentation and ask him/her to keep it for future reference. Target audience Authorised installers WARNING Make sure installation, servicing, maintenance, repair and applied materials follow the instructions from Daikin and, in addition, comply with applicable legislation and are performed by qualified persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is the applicable standard. INFORMATION This document only describes installation instructions specific to the outdoor unit. For installation of the indoor unit (mounting the indoor unit, connecting the refrigerant piping to the indoor unit, connecting the electrical wiring to the indoor unit …), see the installation manual of the indoor unit. Documentation set This document is part of a documentation set. The complete set consists of: ▪ General safety precautions: - Safety instructions that you MUST read before installing - Format: Paper (in the box of the outdoor unit) ▪ Outdoor unit installation manual: - Installation instructions - Format: Paper (in the box of the outdoor unit) ▪ Installer reference guide: - Preparation of the installation, reference data,… - Format: Digital files on http://www.daikineurope.com/support-and-manuals/ product-information/ Latest revisions of the supplied documentation may be available on the regional Daikin website or via your dealer. The original documentation is written in English. All other languages are translations. Technical engineering data ▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of latest technical data is available on the Daikin Business Portal (authentication required).

Installer reference guide 5 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 2 General safety precautions 2.1 About the documentation ▪ The original documentation is written in English. All other languages are translations. ▪ The precautions described in this document cover very important topics, follow them carefully. ▪ The installation of the system, and all activities described in the installation manual and in the installer reference guide MUST be performed by an authorised installer. 2.1.1 Meaning of warnings and symbols DANGER Indicates a situation that results in death or serious injury. DANGER: RISK OF ELECTROCUTION Indicates a situation that could result in electrocution. DANGER: RISK OF BURNING/SCALDING Indicates a situation that could result in burning/scalding because of extreme hot or cold temperatures. DANGER: RISK OF EXPLOSION Indicates a situation that could result in explosion. WARNING Indicates a situation that could result in death or serious injury. WARNING: FLAMMABLE MATERIAL CAUTION Indicates a situation that could result in minor or moderate injury. NOTICE Indicates a situation that could result in equipment or property damage. INFORMATION Indicates useful tips or additional information. Symbols used on the unit:

Installer reference guide 6 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 Symbol Explanation Before installation, read the installation and operation manual, and the wiring instruction sheet. Before performing maintenance and service tasks, read the service manual. For more information, see the installer and user reference guide. The unit contains rotating parts. Be careful when servicing or inspecting the unit. Symbols used in the documentation: Symbol Explanation Indicates a figure title or a reference to it. Example: " 1–3 Figure title" means "Figure 3 in chapter 1". Indicates a table title or a reference to it. Example: " 1–3 Table title" means "Table 3 in chapter 1". 2.2 For the installer 2.2.1 General If you are NOT sure how to install or operate the unit, contact your dealer. DANGER: RISK OF BURNING/SCALDING ▪ Do NOT touch the refrigerant piping, water piping or internal parts during and immediately after operation. It could be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves. ▪ Do NOT touch any accidental leaking refrigerant. WARNING Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by Daikin. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system. WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation.

Installer reference guide 7 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire. CAUTION Do NOT touch the air inlet or aluminium fins of the unit. CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. NOTICE Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress. In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods,… Also, at least, following information MUST be provided at an accessible place at the product: ▪ Instructions for shutting down the system in case of an emergency ▪ Name and address of fire department, police and hospital ▪ Name, address and day and night telephone numbers for obtaining service In Europe, EN378 provides the necessary guidance for this logbook. 2.2.2 Installation site ▪ Provide sufficient space around the unit for servicing and air circulation. ▪ Make sure the installation site withstands the weight and vibration of the unit. ▪ Make sure the area is well ventilated. Do NOT block any ventilation openings. ▪ Make sure the unit is level. Do NOT install the unit in the following places: ▪ In potentially explosive atmospheres. ▪ In places where there is machinery that emits electromagnetic waves. Electromagnetic waves may disturb the control system, and cause malfunction of the equipment. ▪ In places where there is a risk of fire due to the leakage of flammable gases (example: thinner or gasoline), carbon fibre, ignitable dust. ▪ In places where corrosive gas (example: sulphurous acid gas) is produced. Corrosion of copper pipes or soldered parts may cause the refrigerant to leak. Instructions for equipment using R32 refrigerant WARNING: MILDLY FLAMMABLE MATERIAL The refrigerant inside this unit is mildly flammable.

Installer reference guide 8 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING ▪ Do NOT pierce or burn. ▪ Do NOT use means to accelerate the defrosting process or to clean the equipment, other than those recommended by the manufacturer. ▪ Be aware that R32 refrigerant does NOT contain an odour. WARNING The appliance shall be stored so as to prevent mechanical damage and in a well- ventilated room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater) and have a room size as specified below. WARNING Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation (for example national gas regulation) and are executed only by authorised persons. WARNING If one or more rooms are connected to the unit using a duct system, make sure: ▪ there are no operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater) in case the floor area is less than the minimum floor area A (m²). ▪ no auxiliary devices, which may be a potential ignition source, are installed in the duct work (example: hot surfaces with a temperature exceeding 700°C and electric switching device); ▪ only auxiliary devices approved by the manufacturer are used in the duct work; ▪ air inlet AND outlet are connected directly to the same room by ducting. Do NOT use spaces such as a false ceiling as a duct for the air inlet or outlet. NOTICE ▪ Precautions shall be taken to avoid excessive vibration or pulsation to refrigeration piping. ▪ Protection devices, piping and fittings shall be protected as far as possible against adverse environmental effects. ▪ Provision shall be made for expansion and contraction of long runs of piping. ▪ Piping in refrigerating systems shall be designed and installed such as to minimise the likelihood of hydraulic shock damaging the system. ▪ The indoor equipment and pipes shall be securely mounted and guarded such that accidental rupture of equipment or pipes cannot occur from events such as moving furniture or reconstruction activities. CAUTION Do NOT use potential sources of ignition in searching for or detection of refrigerant leaks.

Installer reference guide 9 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 NOTICE ▪ Do NOT re-use joints which have been used already. ▪ Joints made in installation between parts of refrigerant system shall be accessible for maintenance purposes. Installation space requirements WARNING If appliances contain R32 refrigerant, the floor area of the room in which the appliances are installed, operated and stored MUST be larger than the minimum floor area defined in table below A (m2). This applies to: ▪ Indoor units without a refrigerant leakage sensor; in case of indoor units with refrigerant leakage sensor, consult the installation manual ▪ Outdoor units installed or stored indoors (e.g. winter garden, garage, machinery room) ▪ Pipework in unventilated spaces NOTICE ▪ Pipework shall be protected from physical damage. ▪ Installation of pipework shall be kept to a minimum. To determine the minimum floor area 1 Determine the total refrigerant charge in the system (=  factory refrigerant charge + additional refrigerant amount charged). Contains fluorinated greenhouse gases 2 1 1 1 2 2 kg tCO2eq 1000 GWP × kg = = + kg = kg = GWP: xxx R32 2 Determine which graph or table to use. ▪ For indoor units: Is the unit ceiling-mounted, wall-mounted or floor- standing? ▪ For outdoor units installed or stored indoors, and field piping in unventilated spaces, this depends on the installation height: If the installation height is… Then use the graph or table for… <1.8 m Floor-standing units 1.8≤x<2.2 m Wall-mounted units ≥2.2 m Ceiling-mounted units 3 Use the graph or table to determine the minimum floor area.

Installer reference guide 10 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 5.6 5.8 6 6.2 6.4 6.6 6.8 7 7.2 7.4 7.6 7.8 1.843 7.956 8.0 Amin (m2) Floor-standing unit (c) Wall-mounted unit (b) Ceiling-mounted unit (a) m (kg) Ceiling-mounted unit(a) 4.6 13.4 4.6 180 4.8 14.6 4.8 196 5.0 15.8 5.0 213 ≤1.842 — 5.2 17.1 ≤1.842 — 5.2 230 1.843 3.64 5.4 18.5 1.843 28.9 5.4 248 2.0 3.95 5.6 19.9 2.0 34.0 5.6 267 2.2 4.34 5.8 21.3 2.2 41.2 5.8 286 2.4 4.74 6.0 22.8 2.4 49.0 6.0 306 2.6 5.13 6.2 24.3 2.6 57.5 6.2 327 2.8 5.53 6.4 25.9 2.8 66.7 6.4 349 3.0 5.92 6.6 27.6 3.0 76.6 6.6 371 3.2 6.48 6.8 29.3 3.2 87.2 6.8 394 3.4 7.32 7.0 31.0 3.4 98.4 7.0 417 3.6 8.20 7.2 32.8 3.6 110 7.2 441 3.8 9.14 7.4 34.7 3.8 123 7.4 466 4.0 10.1 7.6 36.6 4.0 136 7.6 492 4.2 11.2 7.8 38.5 4.2 150 7.8 518 4.4 12.3 7.956 40.1 4.4 165 7.956 539 m (kg) Amin (m2) 4.6 20.0 4.8 21.8 5.0 23.6 ≤1.842 — 5.2 25.6 1.843 4.45 5.4 27.6 2.0 4.83 5.6 29.7 2.2 5.31 5.8 31.8 2.4 5.79 6.0 34.0 2.6 6.39 6.2 36.4 2.8 7.41 6.4 38.7 3.0 8.51 6.6 41.2 3.2 9.68 6.8 43.7 3.4 10.9 7.0 46.3 3.6 12.3 7.2 49.0 3.8 13.7 7.4 51.8 4.0 15.1 7.6 54.6 4.2 16.7 7.8 57.5 4.4 18.3 7.956 59.9 Wall-mounted unit(b) m (kg) Amin (m2) Floor-standing unit(c) m (kg) Amin (m2) m Total refrigerant charge in the system Amin Minimum floor area (a) Ceiling-mounted unit (= Ceiling-mounted unit)

Installer reference guide 11 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 (b) Wall-mounted unit (= Wall-mounted unit) (c) Floor-standing unit (= Floor-standing unit) 2.2.3 Refrigerant — in case of R410A or R32 If applicable. See the installation manual or installer reference guide of your application for more information. NOTICE Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard. NOTICE Make sure the field piping and connections are NOT subjected to stress. WARNING During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit). WARNING Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately. Possible risks: ▪ Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency. ▪ Toxic gas might be produced if refrigerant gas comes into contact with fire. DANGER: RISK OF EXPLOSION Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leak in the refrigerant circuit: ▪ Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit. Possible consequence: Self- combustion and explosion of the compressor because of air going into the operating compressor. ▪ Use a separate recovery system so that the unit's compressor does NOT have to operate. WARNING ALWAYS recover the refrigerant. Do NOT release them directly into the environment. Use a vacuum pump to evacuate the installation. NOTICE After all the piping has been connected, make sure there is no gas leak. Use nitrogen to perform a gas leak detection. NOTICE ▪ To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant. ▪ When the refrigerant system is to be opened, refrigerant MUST be treated according to the applicable legislation.

Installer reference guide 12 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING Make sure there is no oxygen in the system. Refrigerant may only be charged after performing the leak test and the vacuum drying. Possible consequence: Self-combustion and explosion of the compressor because of oxygen going into the operating compressor. ▪ In case recharge is required, see the nameplate of the unit. It states the type of refrigerant and necessary amount. ▪ The unit is factory charged with refrigerant and depending on pipe sizes and pipe lengths some systems require additional charging of refrigerant. ▪ Only use tools exclusively for the refrigerant type used in the system, this to ensure pressure resistance and prevent foreign materials from entering into the system. ▪ Charge the liquid refrigerant as follows: If Then A siphon tube is present (i.e., the cylinder is marked with "Liquid filling siphon attached") Charge with the cylinder upright. A siphon tube is NOT present Charge with the cylinder upside down. ▪ Open refrigerant cylinders slowly. ▪ Charge the refrigerant in liquid form. Adding it in gas form may prevent normal operation. CAUTION When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the valve is NOT closed immediately, remaining pressure might charge additional refrigerant. Possible consequence: Incorrect refrigerant amount. 2.2.4 Brine If applicable. See the installation manual or installer reference guide of your application for more information. WARNING The selection of the brine MUST be in accordance with the applicable legislation. WARNING Take sufficient precautions in case of brine leakage. If brine leaks, ventilate the area immediately and contact your local dealer.

Installer reference guide 13 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING The ambient temperature inside the unit can get much higher than that of the room, e.g. 70°C. In case of a brine leak, hot parts inside the unit can create a hazardous situation. WARNING The use and installation of the application MUST comply with the safety and environmental precautions specified in the applicable legislation. 2.2.5 Water If applicable. See the installation manual or installer reference guide of your application for more information. NOTICE Make sure water quality complies with EU directive 98/83 EC. 2.2.6 Electrical DANGER: RISK OF ELECTROCUTION ▪ Turn OFF all power supply before removing the switch box cover, connecting electrical wiring or touching electrical parts. ▪ Disconnect the power supply for more than 10 minutes, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components. For the location of the terminals, see the wiring diagram. ▪ Do NOT touch electrical components with wet hands. ▪ Do NOT leave the unit unattended when the service cover is removed. WARNING If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring.

Installer reference guide 14 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING ▪ ONLY use copper wires. ▪ Make sure the field wiring complies with the applicable legislation. ▪ All field wiring MUST be performed in accordance with the wiring diagram supplied with the product. ▪ NEVER squeeze bundled cables and make sure they do NOT come in contact with the piping and sharp edges. Make sure no external pressure is applied to the terminal connections. ▪ Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earth may cause electrical shock. ▪ Make sure to use a dedicated power circuit. NEVER use a power supply shared by another appliance. ▪ Make sure to install the required fuses or circuit breakers. ▪ Make sure to install an earth leakage protector. Failure to do so may cause electrical shock or fire. ▪ When installing the earth leakage protector, make sure it is compatible with the inverter (resistant to high frequency electric noise) to avoid unnecessary opening of the earth leakage protector. CAUTION ▪ When connecting the power supply: connect the earth cable first, before making the current-carrying connections. ▪ When disconnecting the power supply: disconnect the current-carrying cables first, before separating the earth connection. ▪ The length of the conductors between the power supply stress relief and the terminal block itself must be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief. NOTICE Precautions when laying power wiring: ▪ Do NOT connect wiring of different thicknesses to the power terminal block (slack in the power wiring may cause abnormal heat). ▪ When connecting wiring which is the same thickness, do as shown in the figure above. ▪ For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure being exerted on the terminal board. ▪ Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will damage the head and make proper tightening impossible. ▪ Over-tightening the terminal screws may break them. WARNING ▪ After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely. ▪ Make sure all covers are closed before starting up the unit.

Installer reference guide 15 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 NOTICE Only applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method. If there exists the possibility of reversed phase after a momentary black out and the power goes on and off while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts.

Installer reference guide 16 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 3 Specific installer safety instructions Always observe the following safety instructions and regulations. Unit installation (see "6 Unit installation" [4 26]) WARNING Installation shall be done by an installer, the choice of materials and installation shall comply with the applicable legislation. In Europe, EN378 is the applicable standard. Installation site (see "6.1 Preparing the installation site" [4 26]) CAUTION ▪ Check if the installation location can support the unit's weight. Poor installation is hazardous. It can also cause vibrations or unusual operating noise. ▪ Provide sufficient service space. ▪ Do NOT install the unit so that it is in contact with a ceiling or a wall, as this may cause vibrations. WARNING The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater). Opening and closing the unit (see "6.2 Opening and closing the unit" [4 30]) DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. DANGER: RISK OF BURNING/SCALDING DANGER: RISK OF ELECTROCUTION Connecting the refrigerant piping (see "7.2 Connecting the refrigerant piping" [4 36]) CAUTION ▪ No brazing or welding on site for units with R32 refrigerant charge during shipment. ▪ During installation of the refrigeration system, joining of parts with at least one part charged shall be performed taking into account the following requirements: ð inside occupied spaces non permanent joints are not allowed for R32 refrigerant except for site made joints directly connecting the indoor unit to piping. Site made joints directly connecting piping to indoor units shall be of non permanent type.

Installer reference guide 17 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 CAUTION ▪ Use the flare nut fixed to the unit. ▪ To prevent gas leakage, apply refrigeration oil only to the inside of the flare. Use refrigeration oil for R32. ▪ Do NOT reuse joints. CAUTION ▪ Do NOT use mineral oil on flared part. ▪ Do NOT reuse piping from previous installations. ▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material may dissolve and damage the system. WARNING Connect the refrigerant piping securely before running the compressor. If the refrigerant piping is NOT connected and the stop valve is open when the compressor is run, air will be sucked in. This will cause abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury. CAUTION ▪ Incomplete flaring may cause refrigerant gas leakage. ▪ Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage. ▪ Use flare nuts that are included with the unit. Using different flare nuts may cause refrigerant gas leakage. CAUTION Do NOT open the valves before flaring is complete. This would cause refrigerant gas leakage. DANGER: RISK OF EXPLOSION Do NOT start the unit if it is vacuumed. Charging refrigerant (see "8 Charging refrigerant" [4 45]) WARNING The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas. Turn off any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit. Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired. WARNING ▪ Only use R32 as refrigerant. Other substances may cause explosions and accidents. ▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere. ▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.

Installer reference guide 18 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 CAUTION To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant. WARNING NEVER directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite. Electrical installation (see "9 Electrical installation" [4 49]) WARNING Appliance shall be installed in accordance with national wiring regulations. WARNING ▪ All wiring MUST be performed by an authorised electrician and MUST comply with the applicable legislation. ▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock. ▪ Install the required fuses or circuit breakers. ▪ Secure the electrical wiring with cable ties so that the cables do NOT come in contact with sharp edges or piping, particularly on the high-pressure side. ▪ Do NOT use taped wires, stranded conductor wires, extension cords, or connections from a star system. They can cause overheating, electrical shock or fire. ▪ Do NOT install a phase advancing capacitor, because this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents. WARNING ALWAYS use multicore cable for power supply cables. WARNING Use an all-pole disconnection type breaker with at least 3 mm between the contact point gaps that provide full disconnection under overvoltage category III. WARNING If the supply cord is damaged, it MUST be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. WARNING Do NOT connect the power supply to the indoor unit. This could result in electrical shock or fire.

Installer reference guide 19 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING ▪ Do NOT use locally purchased electrical parts inside the product. ▪ Do NOT branch the power supply for the drain pump, etc. from the terminal block. This could result in electrical shock or fire. WARNING Keep the interconnection wiring away from copper pipes without thermal insulation as such pipes will be very hot. DANGER: RISK OF ELECTROCUTION All electrical parts (including thermistors) are powered by the power supply. Do not touch them with bare hands. DANGER: RISK OF ELECTROCUTION Disconnect the power supply for more than 10 minutes, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components. For the location of the terminals, see the wiring diagram. Finishing indoor unit installation (see "10 Finishing the outdoor unit installation" [4 55]) DANGER: RISK OF ELECTROCUTION ▪ Make sure that the system is earthed properly. ▪ Turn off the power supply before servicing. ▪ Install the switch box cover before turning on the power supply. Configuration (see "11 Configuration" [4 56]) WARNING Before connecting or disconnecting the connector, make sure the power supply is turned off. Commissioning (see "12 Commissioning" [4 58]) DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING CAUTION Do NOT perform the test operation while working on the indoor units. When performing the test operation, NOT only the outdoor unit, but the connected indoor unit will operate as well. Working on an indoor unit while performing a test operation is dangerous.

Installer reference guide 20 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 CAUTION Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT remove the fan guard. When the fan is rotating at high speed, it will cause injury. Maintenance and service (see "14 Maintenance and service" [4 62]) DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING WARNING ▪ Before carrying out any maintenance or repair activity, ALWAYS switch off the circuit breaker on the supply panel, remove the fuses or open the protection devices of the unit. ▪ Do NOT touch live parts for 10 minutes after the power supply is turned off because of high voltage risk. ▪ Please note that some sections of the electric component box are hot. ▪ Make sure you do NOT touch a conductive section. ▪ Do NOT rinse the unit. This may cause electric shocks or fire. DANGER: RISK OF ELECTROCUTION ▪ Use this compressor on a grounded system only. ▪ Turn the power off before servicing the compressor. ▪ Reattach the switch box cover and service lid after servicing. CAUTION Always wear safety goggles and protective gloves. DANGER: RISK OF EXPLOSION ▪ Use a pipe cutter to remove the compressor. ▪ Do NOT use the brazing torch. ▪ Use approved refrigerants and lubricants only. DANGER: RISK OF BURNING/SCALDING Do NOT touch the compressor with bare hands. Troubleshooting (see "15 Troubleshooting" [4 64]) DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING

Installer reference guide 21 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING ▪ When carrying out an inspection on the switch box of the unit, ALWAYS make sure that the unit is disconnected from the mains. Turn off the respective circuit breaker. ▪ When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. NEVER shunt safety devices or change their values to a value other than the factory default setting. If you are unable to find the cause of the problem, call your dealer. WARNING Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this appliance MUST NOT be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly turned ON and OFF by the utility. DANGER: RISK OF ELECTROCUTION ▪ When the unit is not operating, the LEDs on the PCB are turned off in order to save power. ▪ Even when the LEDs are off, the terminal block and the PCB may be powered.

Installer reference guide 22 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 4 About the box 4.1 Overview: About the box This chapter describes what you have to do after the box with the outdoor unit is delivered on-site. Keep the following in mind: ▪ At delivery, the unit MUST be checked for damage. Any damage MUST be reported immediately to the claims agent of the carrier. ▪ Bring the packed unit as close as possible to its final installation position to prevent damage during transport. ▪ Prepare the path along which you want to bring the unit inside in advance. ▪ When handling the unit, take into account the following: Fragile, handle the unit with care. Keep the unit upright in order to avoid damage. Keep the unit away from rain or damp conditions. At least 2 persons MUST handle the box with the unit. 4.2 Outdoor unit 4.2.1 To unpack the outdoor unit

Installer reference guide 23 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 1 2 4.2.2 To remove the accessories from the outdoor unit 1 Lift the outdoor unit. CAUTION Only handle the outdoor unit as follows: 2 Remove the accessories at the bottom of the package. 1× 1× 1× 1× 1× 6× 3× 1× b e c d a f g h a General safety precautions b Outdoor unit installation manual

Installer reference guide 24 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 c Fluorinated greenhouse gases label d Multilingual fluorinated greenhouse gases label e Drain plug (located on the bottom of the packing case) f Drain cap (1) g Drain cap (2) h Energy label

Installer reference guide 25 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 5 About the unit WARNING: MILDLY FLAMMABLE MATERIAL The refrigerant inside this unit is mildly flammable. 5.1 Overview: About the unit This chapter contains information about: ▪ Identification of the outdoor unit 5.2 Identification NOTICE When installing or servicing several units at the same time, make sure NOT to switch the service panels between different models. 5.2.1 Identification label: Outdoor unit Location

Installer reference guide 26 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 6 Unit installation WARNING Installation shall be done by an installer, the choice of materials and installation shall comply with the applicable legislation. In Europe, EN378 is the applicable standard. In this chapter 6.1 Preparing the installation site ................................................................................................................................................ 26 6.1.1 Installation site requirements of the outdoor unit ............................................................................................... 27 6.1.2 Additional installation site requirements of the outdoor unit in cold climates ................................................... 29 6.2 Opening and closing the unit ................................................................................................................................................. 30 6.2.1 About opening the units ........................................................................................................................................ 30 6.2.2 To open the outdoor unit ...................................................................................................................................... 30 6.2.3 To close the outdoor unit....................................................................................................................................... 30 6.3 Mounting the outdoor unit .................................................................................................................................................... 31 6.3.1 About mounting the outdoor unit......................................................................................................................... 31 6.3.2 Precautions when mounting the outdoor unit...................................................................................................... 31 6.3.3 To provide the installation structure..................................................................................................................... 31 6.3.4 To install the outdoor unit ..................................................................................................................................... 32 6.3.5 To provide drainage ............................................................................................................................................... 32 6.3.6 To prevent the outdoor unit from falling over...................................................................................................... 33 6.1 Preparing the installation site Do NOT install the unit in places often used as work place. In case of construction works (e.g. grinding works) where a lot of dust is created, the unit MUST be covered. Choose an installation location with sufficient space for carrying the unit in and out of the site. CAUTION ▪ Check if the installation location can support the unit's weight. Poor installation is hazardous. It can also cause vibrations or unusual operating noise. ▪ Provide sufficient service space. ▪ Do NOT install the unit so that it is in contact with a ceiling or a wall, as this may cause vibrations. ▪ Choose a location where the operation noise or the hot/cold air discharged from the unit will not disturb anyone. ▪ Provide sufficient space around the unit for servicing and air circulation. ▪ Avoid areas where flammable gas or product might leak. ▪ Install units, power cables and communication wiring at least 3  m away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 3 m may not be sufficient. NOTICE Do NOT place objects below the indoor and/or outdoor unit that may get wet. Otherwise condensation on the unit or refrigerant pipes, air filter dirt or drain blockage may cause dripping, and objects under the unit may get dirty or damaged.

Installer reference guide 27 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater). 6.1.1 Installation site requirements of the outdoor unit INFORMATION Also read the following requirements: ▪ "2 General safety precautions" [4 5]. ▪ "7.1.3 Refrigerant piping length and height difference" [4 36]. Mind the following spacing guidelines: >100 >50 >350 (mm) b a >100 >50 b a >100 b a b a >350 >350 >50 b a a Air outlet b Air inlet NOTICE The height of the wall on the outlet side of the outdoor unit MUST be ≤1200 mm. NOTICE ▪ Do NOT stack the units on each other. ▪ Do NOT hang the unit on a ceiling. Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet causes short circuit (suction of discharge air). This may result in: ▪ deterioration of the operational capacity; ▪ frequent frost acceleration in heating operation; ▪ disruption of operation due to decrease of low pressure or increase of high pressure; ▪ a broken fan (if a strong wind blows continuously on the fan, it may start rotating very fast, until it breaks). It is recommended to install a baffle plate when the air outlet is exposed to wind. It is recommended to install the outdoor unit with the air inlet facing the wall and NOT directly exposed to the wind.

Installer reference guide 28 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 b a b c a Baffle plate b Prevailing wind direction c Air outlet Do NOT install the unit in the following places: ▪ Sound sensitive areas (e.g. near a bedroom), so that the operation noise will cause no trouble. Note: If the sound is measured under actual installation conditions, the measured value might be higher than the sound pressure level mentioned in Sound spectrum in the data book due to environmental noise and sound reflections. INFORMATION The sound pressure level is less than 70 dBA. ▪ In places where a mineral oil mist, spray or vapour may be present in the atmosphere. Plastic parts may deteriorate and fall off or cause water leakage. It is NOT recommended to install the unit in the following places because it may shorten the life of the unit: ▪ Where the voltage fluctuates a lot ▪ In vehicles or vessels ▪ Where acidic or alkaline vapour is present Seaside installation. Make sure the outdoor unit is NOT directly exposed to sea winds. This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit. Install the outdoor unit away from direct sea winds. Example: Behind the building. b c a If the outdoor unit is exposed to direct sea winds, install a windbreaker. ▪ Height of windbreaker≥1.5×height of outdoor unit ▪ Mind the service space requirements when installing the windbreaker.

Installer reference guide 29 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 a b c d c d a Sea wind b Building c Outdoor unit d Windbreaker The outdoor unit is designed for outdoor installation only, and for ambient temperatures ranging from –10 to 46°C in cooling mode and from –15 to 24°C in heating mode. Unless otherwise specified in the operation manual of the connected indoor unit. 6.1.2 Additional installation site requirements of the outdoor unit in cold climates Protect the outdoor unit against direct snowfall and take care that the outdoor unit is NEVER snowed up. a b c c d a Snow cover or shed b Pedestal c Prevailing wind direction d Air outlet It is recommended to provide at least 150  mm of free space below the unit (300 mm for heavy snowfall areas). Additionally, make sure the unit is positioned at least 100 mm above the maximum expected level of snow. If necessary, construct a pedestal. See "6.3 Mounting the outdoor unit" [4 31] for more details. In heavy snowfall areas it is very important to select an installation site where the snow will NOT affect the unit. If lateral snowfall is possible, make sure that the heat exchanger coil is NOT affected by the snow. If necessary, install a snow cover or shed and a pedestal.

Installer reference guide 30 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 6.2 Opening and closing the unit 6.2.1 About opening the units At certain times, you have to open the unit. Example: ▪ When connecting the refrigerant piping ▪ When connecting the electrical wiring ▪ When maintaining or servicing the unit DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. 6.2.2 To open the outdoor unit DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING 3× 2 2 1 1 1 6.2.3 To close the outdoor unit NOTICE When closing the outdoor unit cover, make sure that the tightening torque does NOT exceed 1.3 N•m. 3× 1 1 2 2 2

Installer reference guide 31 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 6.3 Mounting the outdoor unit 6.3.1 About mounting the outdoor unit When The outdoor and indoor unit must be mounted before the refrigerant piping can be connected. Typical workflow Mounting the outdoor unit typically consists of the following stages: 1 Providing the installation structure. 2 Installing the outdoor unit. 3 Providing drainage. 4 Preventing the unit from falling over. 6.3.2 Precautions when mounting the outdoor unit INFORMATION Also read the precautions and requirements in the following chapters: ▪ "2 General safety precautions" [4 5] ▪ "6.1 Preparing the installation site" [4 26] 6.3.3 To provide the installation structure Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise. Use a vibration-proof rubber (field supply) in cases where vibrations may be transmitted to the building. Fix the unit securely by means of foundation bolts in accordance with the foundation drawing. Prepare 4 sets of M8 or M10 anchor bolts, nuts and washers (field supply). 20 mm

Installer reference guide 32 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 353 600 240 (mm) 240 a a 100 mm above expected level of snow 6.3.4 To install the outdoor unit 4× M8/M10 6.3.5 To provide drainage ▪ Make sure that condensation water can be evacuated properly. ▪ Install the unit on a base to make sure that there is proper drainage in order to avoid ice accumulation. ▪ Prepare a water drainage channel around the foundation to drain waste water away from the unit. ▪ Avoid drain water flowing over the footpath, so that it does NOT become slippery in case of ambient freezing temperatures. ▪ If you install the unit on a frame, install a waterproof plate within 150 mm of the bottom side of the unit in order to prevent water from getting into the unit and to avoid drain water dripping (see the following figure).

Installer reference guide 33 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 NOTICE If the unit is installed in a cold climate, take adequate measures so that the evacuated condensate CANNOT freeze. NOTICE If the drain holes of the outdoor unit are blocked up by a mounting base or floor surface, place additional foot bases ≤30 mm under the outdoor unit's feet. INFORMATION For information on the available options, contact your dealer. 1 Use a drain plug for drainage. 2 Use a Ø16 mm hose (field supply). b c d a a Drain port b Bottom frame c Drain plug d Hose (field supply) To close the drain holes and attach the drain socket NOTICE In cold areas, do NOT use a drain socket, hose and caps (1, 2) with the outdoor unit. Take adequate measures so that the evacuated condensate CANNOT freeze. 1 Install drain caps 1 and 2 (accessory). Make sure the edges of the drain caps close off the holes completely. a b a Bottom frame b Drain cap 2 Install the drain socket. a c b b b a a a Drain hole. Install a drain cap (2). b Drain hole. Install a drain cap (1). c Drain hole for drain socket 6.3.6 To prevent the outdoor unit from falling over In case the unit is installed in places where strong wind can tilt the unit, take following measure: 1 Prepare 2 cables as indicated in the following illustration (field supply). 2 Place the 2 cables over the outdoor unit.

Installer reference guide 34 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 3 Insert a rubber sheet between the cables and the outdoor unit to prevent the cables from scratching the paint (field supply). 4 Attach the ends of the cables. 5 Tighten the cables.

Installer reference guide 35 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 7 Piping installation In this chapter 7.1 Preparing refrigerant piping................................................................................................................................................... 35 7.1.1 Refrigerant piping requirements ........................................................................................................................... 35 7.1.2 Refrigerant piping insulation.................................................................................................................................. 36 7.1.3 Refrigerant piping length and height difference................................................................................................... 36 7.2 Connecting the refrigerant piping.......................................................................................................................................... 36 7.2.1 About connecting the refrigerant piping............................................................................................................... 37 7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 37 7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 38 7.2.4 Pipe bending guidelines ......................................................................................................................................... 39 7.2.5 To flare the pipe end.............................................................................................................................................. 39 7.2.6 Using the stop valve and service port.................................................................................................................... 40 7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 41 7.3 Checking the refrigerant piping.............................................................................................................................................. 42 7.3.1 About checking the refrigerant piping................................................................................................................... 42 7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 42 7.3.3 To check for leaks................................................................................................................................................... 43 7.3.4 To perform vacuum drying .................................................................................................................................... 43 7.1 Preparing refrigerant piping 7.1.1 Refrigerant piping requirements INFORMATION Also read the precautions and requirements in the "2  General safety precautions" [4 5]. NOTICE The piping and other pressure-containing parts shall be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant. ▪ Piping material: Phosphoric acid deoxidised seamless copper. ▪ Flare connections: Only use annealed material. ▪ Piping diameter: Models Liquid piping Gas piping RXM71R Ø6.4 mm (1/4") Ø15.9 mm (5/8") ARXM71R Ø9.5 mm (3/8") Ø15.9 mm (5/8") RXM42R Ø6.4 mm (1/4") Ø9.5 mm (3/8") Other Ø6.4 mm (1/4") Ø12.7 mm (1/2") ▪ Piping temper grade and thickness: Outer diameter (Ø) Temper grade Thickness (t)(a) 6.4 mm (1/4") 9.5 mm (3/8") 12.7 mm (1/2") Annealed (O) ≥0.8 mm t Ø 15.9 mm (5/8") ≥1 mm (a) Depending on the applicable legislation and the maximum working pressure of the unit (see "PS High" on the unit name plate), larger piping thickness might be required.

Installer reference guide 36 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 7.1.2 Refrigerant piping insulation ▪ Use polyethylene foam as insulation material: - with a heat transfer rate between 0.041 and 0.052  W/mK (0.035 and 0.045 kcal/mh°C) - with a heat resistance of at least 120°C ▪ Insulation thickness Pipe outer diameter (Øp) Insulation inner diameter (Øi) Insulation thickness (t) 6.4 mm (1/4") 8~10 mm ≥10 mm 9.5 mm (3/8") 10~14 mm ≥13 mm 12.7 mm (1/2") 14~16 mm ≥10 mm 15.9 mm (5/8") 16~20 mm ≥13 mm Øi Øi t Øp Øp If the temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the insulation materials should be at least 20  mm to prevent condensation on the surface of the insulation. 7.1.3 Refrigerant piping length and height difference What? Distance Maximum allowable pipe length 30 m Minimum allowable pipe length 3 m Maximum allowable height distance 20 m 7.2 Connecting the refrigerant piping CAUTION ▪ No brazing or welding on site for units with R32 refrigerant charge during shipment. ▪ During installation of the refrigeration system, joining of parts with at least one part charged shall be performed taking into account the following requirements: ð inside occupied spaces non permanent joints are not allowed for R32 refrigerant except for site made joints directly connecting the indoor unit to piping. Site made joints directly connecting piping to indoor units shall be of non permanent type. WARNING ▪ Only use R32 as refrigerant. Other substances may cause explosions and accidents. ▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere. ▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.

Installer reference guide 37 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 7.2.1 About connecting the refrigerant piping Before connecting the refrigerant piping Make sure the outdoor and indoor unit are mounted. Typical workflow Connecting the refrigerant piping involves: ▪ Connecting the refrigerant piping to the indoor unit ▪ Connecting the refrigerant piping to the outdoor unit ▪ Insulating the refrigerant piping ▪ Keeping in mind the guidelines for: - Pipe bending - Flaring pipe ends - Using the stop valves 7.2.2 Precautions when connecting the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ "2 General safety precautions" [4 5] ▪ "7.1 Preparing refrigerant piping" [4 35] DANGER: RISK OF BURNING/SCALDING CAUTION ▪ Use the flare nut fixed to the unit. ▪ To prevent gas leakage, apply refrigeration oil only to the inside of the flare. Use refrigeration oil for R32. ▪ Do NOT reuse joints. CAUTION ▪ Do NOT use mineral oil on flared part. ▪ Do NOT reuse piping from previous installations. ▪ NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material may dissolve and damage the system.

Installer reference guide 38 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 NOTICE Take the following precautions on refrigerant piping into account: ▪ Avoid anything but the designated refrigerant to get mixed into the refrigerant cycle (e.g. air). ▪ Only use R32 when adding refrigerant. ▪ Only use installation tools (e.g. manifold gauge set) that are exclusively used for R32 installations to withstand the pressure and to prevent foreign materials (e.g. mineral oils and moisture) from mixing into the system. ▪ Install the piping so that the flare is NOT subjected to mechanical stress. ▪ Protect the piping as described in the following table to prevent dirt, liquid or dust from entering the piping. ▪ Use caution when passing copper tubes through walls (see figure below). Unit Installation period Protection method Outdoor unit >1 month Pinch the pipe <1 month Pinch or tape the pipe Indoor unit Regardless of the period INFORMATION Do NOT open the refrigerant stop valve before checking the refrigerant piping. When you need to charge additional refrigerant it is recommended to open the refrigerant stop valve after charging. WARNING Connect the refrigerant piping securely before running the compressor. If the refrigerant piping is NOT connected and the stop valve is open when the compressor is run, air will be sucked in. This will cause abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury. 7.2.3 Guidelines when connecting the refrigerant piping Take the following guidelines into account when connecting pipes: ▪ Coat the flare inner surface with ether oil or ester oil when connecting a flare nut. Tighten 3 or 4 turns by hand, before tightening firmly. ▪ ALWAYS use 2 wrenches together when loosening a flare nut. ▪ ALWAYS use a spanner and torque wrench together to tighten the flare nut when connecting the piping. This to prevent nut cracking and leaks.

Installer reference guide 39 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 a b c d a Torque wrench b Spanner c Piping union d Flare nut Piping size (mm) Tightening torque (N•m) Flare dimensions (A) (mm) Flare shape (mm) Ø6.4 15~17 8.7~9.1 R= 0.4~0.8 ±2 45° 90°±2 ØA Ø9.5 33~39 12.8~13.2 Ø12.7 50~60 16.2~16.6 Ø15.9 62~75 19.3~19.7 7.2.4 Pipe bending guidelines Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30~40 mm or larger). 7.2.5 To flare the pipe end CAUTION ▪ Incomplete flaring may cause refrigerant gas leakage. ▪ Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage. ▪ Use flare nuts that are included with the unit. Using different flare nuts may cause refrigerant gas leakage. 1 Cut the pipe end with a pipe cutter. 2 Remove burrs with the cut surface facing down so that the chips do NOT enter the pipe. a b a Cut exactly at right angles. b Remove burrs. 3 Remove the flare nut from the stop valve and put the flare nut on the pipe. 4 Flare the pipe. Set exactly at the position as shown in the following figure. A Flare tool for R32 (clutch type) Conventional flare tool Clutch type (Ridgid-type) Wing nut type (Imperial-type) A 0~0.5 mm 1.0~1.5 mm 1.5~2.0 mm 5 Check that the flaring is properly made.

Installer reference guide 40 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 a b c a Flare’s inner surface MUST be flawless. b The pipe end MUST be evenly flared in a perfect circle. c Make sure the flare nut is fitted. 7.2.6 Using the stop valve and service port CAUTION Do NOT open the valves before flaring is complete. This would cause refrigerant gas leakage. To handle the stop valve Take the following guidelines into account: ▪ The stop valves are factory closed. ▪ The following figure shows the stop valve parts required when handling the valve. c d a b a Service port and service port cap b Valve stem c Field piping connection d Stem cap ▪ Keep both stop valves open during operation. ▪ Do NOT apply excessive force to the valve stem. Doing so may break the valve body. ▪ ALWAYS make sure to secure the stop valve with a spanner, then loosen or tighten the flare nut with a torque wrench. Do NOT place the spanner on the stem cap, as this could cause a refrigerant leak. a b a Spanner b Torque wrench ▪ When it is expected that the operating pressure will be low (e.g. when cooling will be performed while the outside air temperature is low), sufficiently seal the flare nut in the stop valve on the gas line with silicon sealant to prevent freezing. Silicon sealant, make sure there is no gap.

Installer reference guide 41 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 To open/close the stop valve 1 Remove the stop valve cover. 2 Insert a hexagon wrench (liquid side: 4 mm, gas side: 4 mm) into the valve stem and turn the valve stem: Counterclockwise to open Clockwise to close 3 When the stop valve CANNOT be turned any further, stop turning. 4 Install the stop valve cover. Result: The valve is now open/closed. To handle the stem cap ▪ The stem cap is sealed where indicated with the arrow. Do NOT damage it. ▪ After handling the stop valve, tighten the stem cap, and check for refrigerant leaks. Piping Ø (mm) Tightening torque (N∙m) 6.4 22~28 9.5 33~39 12.7 49~59 15.9 61~74 To handle the service cap ▪ ALWAYS use a charge hose equipped with a valve depressor pin, since the service port is a Schrader type valve. ▪ After handling the service port, tighten the service port cap, and check for refrigerant leaks. Item Tightening torque (N∙m) Service port cap 11~14 7.2.7 To connect the refrigerant piping to the outdoor unit ▪ Piping length. Keep field piping as short as possible. ▪ Piping protection. Protect the field piping against physical damage. 1 Connect the liquid refrigerant connection from the indoor unit to the liquid stop valve of the outdoor unit. a b c a Liquid stop valve

Installer reference guide 42 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 b Gas stop valve c Service port 2 Connect the gas refrigerant connection from the indoor unit to the gas stop valve of the outdoor unit. NOTICE It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape. 7.3 Checking the refrigerant piping 7.3.1 About checking the refrigerant piping The outdoor unit's internal refrigerant piping has been factory tested for leaks. You only have to check the outdoor unit's external refrigerant piping. Before checking the refrigerant piping Make sure the refrigerant piping is connected between the outdoor unit and the indoor unit. Typical workflow Checking the refrigerant piping typically consists of the following stages: 1 Checking for leaks in the refrigerant piping. 2 Performing vacuum drying to remove all moisture, air or nitrogen from the refrigerant piping. If there is a possibility of moisture being present in the refrigerant piping (for example, water may have entered the piping), first carry out the vacuum drying procedure below until all moisture has been removed. 7.3.2 Precautions when checking the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ "2 General safety precautions" [4 5] ▪ "7.1 Preparing refrigerant piping" [4 35] NOTICE Use a 2-stage vacuum pump with a non-return valve that can evacuate to a gauge pressure of −⁠100.7 kPa (−⁠1.007 bar)(5 Torr absolute). Make sure the pump oil does not flow oppositely into the system while the pump is not working. NOTICE Use this vacuum pump for R32 exclusively. Using the same pump for other refrigerants may damage the pump and the unit. NOTICE ▪ Connect the vacuum pump to the service port of the gas stop valve. ▪ Make sure that the gas stop valve and liquid stop valve are firmly closed before performing the leak test or vacuum drying.

Installer reference guide 43 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 7.3.3 To check for leaks NOTICE Do NOT exceed the unit's maximum working pressure (see "PS High" on the unit name plate). NOTICE Make sure to use a recommended bubble test solution from your wholesaler. Do not use soap water, which may cause cracking of flare nuts (soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold), and/or lead to corrosion of flared joints (soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare). 1 Charge the system with nitrogen gas up to a gauge pressure of at least 200 kPa (2 bar). It is recommended to pressurize to 3000 kPa (30 bar) in order to detect small leaks. 2 Check for leaks by applying the bubble test solution to all connections. 3 Discharge all nitrogen gas. 7.3.4 To perform vacuum drying DANGER: RISK OF EXPLOSION Do NOT start the unit if it is vacuumed. Connect the vacuum pump and manifold as follows: i h j a b c h k d f f e g a Low pressure gauge b Gauge manifold c High pressure gauge d Low-pressure valve (Lo) e High-pressure valve (Hi) f Charging hoses g Vacuum pump h Valve caps i Service port j Gas stop valve k Liquid stop valve 1 Vacuum the system until the pressure on the manifold indicates −0.1  MPa (−1 bar). 2 Leave as is for 4-5 minutes and check the pressure: If the pressure… Then… Does not change There is no moisture in the system. This procedure is finished.

Installer reference guide 44 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 If the pressure… Then… Increases There is moisture in the system. Go to the next step. 3 Vacuum the system for at least 2 hours to a manifold pressure of −0.1 MPa (−1 bar). 4 After turning the pump OFF, check the pressure for at least 1 hour. 5 If you do NOT reach the target vacuum or CANNOT maintain the vacuum for 1 hour, do the following: ▪ Check for leaks again. ▪ Perform vacuum drying again. NOTICE Make sure to open the stop valves after installing the refrigerant piping and performing vacuum drying. Running the system with the stop valves closed may break the compressor. INFORMATION After opening the stop valve, it is possible that the pressure in the refrigerant piping does NOT increase. This might be caused by e.g. the closed state of the expansion valve in the outdoor unit circuit, but does NOT present any problem for correct operation of the unit.

Installer reference guide 45 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 8 Charging refrigerant In this chapter 8.1 About charging refrigerant..................................................................................................................................................... 45 8.2 About the refrigerant ............................................................................................................................................................. 46 8.3 Precautions when charging refrigerant ................................................................................................................................. 47 8.4 To determine the additional refrigerant amount.................................................................................................................. 47 8.5 To determine the complete recharge amount ...................................................................................................................... 47 8.6 To charge additional refrigerant ............................................................................................................................................ 47 8.7 To fix the fluorinated greenhouse gases label....................................................................................................................... 48 8.1 About charging refrigerant The outdoor unit is factory charged with refrigerant, but in some cases the following might be necessary: What When Charging additional refrigerant When the total liquid piping length is more than specified (see later). Completely recharging refrigerant Example: ▪ When relocating the system. ▪ After a leak. Charging additional refrigerant Before charging additional refrigerant, make sure the outdoor unit's external refrigerant piping is checked (leak test, vacuum drying). INFORMATION Depending on the units and/or the installation conditions, it might be necessary to connect electrical wiring before you can charge refrigerant. Typical workflow – Charging additional refrigerant typically consists of the following stages: 1 Determining if and how much you have to charge additionally. 2 If necessary, charging additional refrigerant. 3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of the outdoor unit. Completely recharging refrigerant Before completely recharging refrigerant, make sure the following is done: 1 All refrigerant is recovered from the system. 2 The outdoor unit's external refrigerant piping is checked (leak test, vacuum drying). 3 Vacuum drying on the outdoor unit's internal refrigerant piping is performed. NOTICE Before completely recharging, perform vacuum drying on the outdoor unit's internal refrigerant piping as well.

Installer reference guide 46 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 Typical workflow – Completely recharging refrigerant typically consists of the following stages: 1 Determining how much refrigerant to charge. 2 Charging refrigerant. 3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of the outdoor unit. 8.2 About the refrigerant This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere. Refrigerant type: R32 Global warming potential (GWP) value: 675 WARNING: MILDLY FLAMMABLE MATERIAL The refrigerant inside this unit is mildly flammable. WARNING The appliance shall be stored in a room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater). WARNING ▪ Do NOT pierce or burn refrigerant cycle parts. ▪ Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer. ▪ Be aware that the refrigerant inside the system is odourless. WARNING The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas. Turn off any combustible heating devices, ventilate the room, and contact the dealer where you purchased the unit. Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired. WARNING NEVER directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite.

Installer reference guide 47 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 8.3 Precautions when charging refrigerant INFORMATION Also read the precautions and requirements in the following chapters: ▪ "2 General safety precautions" [4 5] ▪ "7.1 Preparing refrigerant piping" [4 35] 8.4 To determine the additional refrigerant amount For ARXM71R If the total liquid piping length is… Then… ≤10 m Do NOT add additional refrigerant. >10 m R=(total length (m) of liquid piping⁠–⁠10 m)×0.035 R=Additional charge (kg) (rounded in units of 0.01 kg) For other outdoor units If the total liquid piping length is… Then… ≤10 m Do NOT add additional refrigerant. >10 m R=(total length (m) of liquid piping⁠–⁠10 m)×0.020 R=Additional charge (kg) (rounded in units of 0.01 kg) INFORMATION Piping length is the one-way length of liquid piping. 8.5 To determine the complete recharge amount INFORMATION If a complete recharge is necessary, the total refrigerant charge is: the factory refrigerant charge (see unit name plate) + the determined additional amount. 8.6 To charge additional refrigerant WARNING ▪ Only use R32 as refrigerant. Other substances may cause explosions and accidents. ▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere. ▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.

Installer reference guide 48 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 CAUTION To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant. Prerequisite: Before charging refrigerant, make sure the refrigerant piping is connected and checked (leak test and vacuum drying). 1 Connect the refrigerant cylinder to the service port. 2 Charge the additional refrigerant amount. 3 Open the gas stop valve. If pump down is needed in case of dismantling or relocating the system, see "16.2 To pump down" [4 66] for more details. 8.7 To fix the fluorinated greenhouse gases label 1 Fill in the label as follows: b Contains fluorinated greenhouse gases 2 1 1 1 2 2 kg tCO2eq GWP × kg 1000 = = + kg = kg = GWP: XXX RXXX a f c d e a If a multilingual fluorinated greenhouse gases label is delivered with the unit (see accessories), peel off the applicable language and stick it on top of a. b Factory refrigerant charge: see unit name plate c Additional refrigerant amount charged d Total refrigerant charge e Quantity of fluorinated greenhouse gases of the total refrigerant charge expressed as tonnes CO2 equivalent. f GWP = Global warming potential NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO2 equivalent. Formula to calculate the quantity in CO2 equivalent tonnes: GWP value of the refrigerant × total refrigerant charge [in kg] / 1000 Use the GWP value mentioned on the refrigerant charge label. 2 Fix the label on the inside of the outdoor unit near the gas and liquid stop valves.

Installer reference guide 49 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 9 Electrical installation In this chapter 9.1 About connecting the electrical wiring.................................................................................................................................. 49 9.1.1 Precautions when connecting the electrical wiring .............................................................................................. 49 9.1.2 Guidelines when connecting the electrical wiring ................................................................................................ 51 9.1.3 Specifications of standard wiring components ..................................................................................................... 52 9.2 To connect the electrical wiring to the outdoor unit ............................................................................................................ 53 9.1 About connecting the electrical wiring Before connecting the electrical wiring Make sure: ▪ The refrigerant piping is connected and checked ▪ The water piping is connected Typical workflow Connecting the electrical wiring typically consists of the following stages: 1 Making sure the power supply system complies with the electrical specifications of the units. 2 Connecting the electrical wiring to the outdoor unit. 3 Connecting the electrical wiring to the indoor unit. 4 Connecting the main power supply. 9.1.1 Precautions when connecting the electrical wiring DANGER: RISK OF ELECTROCUTION WARNING Appliance shall be installed in accordance with national wiring regulations. WARNING ALWAYS use multicore cable for power supply cables. INFORMATION Also read the precautions and requirements in the "2  General safety precautions" [4 5]. INFORMATION Also read "9.1.3 Specifications of standard wiring components" [4 52].

Installer reference guide 50 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 WARNING ▪ All wiring MUST be performed by an authorised electrician and MUST comply with the applicable legislation. ▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock. ▪ Install the required fuses or circuit breakers. ▪ Secure the electrical wiring with cable ties so that the cables do NOT come in contact with sharp edges or piping, particularly on the high-pressure side. ▪ Do NOT use taped wires, stranded conductor wires, extension cords, or connections from a star system. They can cause overheating, electrical shock or fire. ▪ Do NOT install a phase advancing capacitor, because this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents. WARNING Use an all-pole disconnection type breaker with at least 3 mm between the contact point gaps that provide full disconnection under overvoltage category III. WARNING If the supply cord is damaged, it MUST be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. WARNING Do NOT connect the power supply to the indoor unit. This could result in electrical shock or fire. WARNING ▪ Do NOT use locally purchased electrical parts inside the product. ▪ Do NOT branch the power supply for the drain pump, etc. from the terminal block. This could result in electrical shock or fire. WARNING Keep the interconnection wiring away from copper pipes without thermal insulation as such pipes will be very hot. DANGER: RISK OF ELECTROCUTION All electrical parts (including thermistors) are powered by the power supply. Do not touch them with bare hands.

Installer reference guide 51 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 DANGER: RISK OF ELECTROCUTION Disconnect the power supply for more than 10 minutes, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components. For the location of the terminals, see the wiring diagram. b c DC P1+ DC N1- a d e g f a Multimeter (DC voltage range) b S80 – reversing solenoid valve lead wire c S20 – electronic expansion valve lead wire d S40 – thermal overload relay lead wire e S90 – thermistor lead wire f LED g S70 – fan motor lead wire 9.1.2 Guidelines when connecting the electrical wiring Keep the following in mind: ▪ If stranded conductor wires are used, install a round crimp-style terminal on the end of the wire. Place the round crimp-style terminal on the wire up to the covered part and fasten the terminal with the appropriate tool. b a a Stranded conductor wire b Round crimp-style terminal ▪ Use the following methods for installing wires: Wire type Installation method Single-core wire c b c a a A AA´ A´ a Curled single-core wire b Screw c Flat washer

Installer reference guide 52 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 Wire type Installation method Stranded conductor wire with round crimp-style terminal c b b a c a B B a Terminal b Screw c Flat washer Allowed NOT allowed Tightening torques Item Tightening torque (N•m) M4 (X1M) 1.2~1.3 M4 (earth) ▪ The earth wire between the wire retainer and the terminal must be longer than the other wires. 1-3 9.1.3 Specifications of standard wiring components Component Power supply cable Voltage 220~240 V Phase 1~ Frequency 50 Hz Wire sizes 3-core cable 2.5 mm2~4.0 mm2 H05RN-F (60245 IEC 57) Interconnection cable (indoor↔outdoor) 4-core cable 1.5 mm2~2.5 mm2 and applicable for 220~240 V H05RN-F (60245 IEC 57)

Installer reference guide 53 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 Component Recommended circuit breaker RXM71R RXP50~71M RXF50+60B RXF71A ARXF50~71A 20 A(a) ARXM50~71R RXM50+60R 16 A RXM42R RXA42+50R RXJ50N 13 A Earth leakage circuit breaker MUST comply with applicable legislation (a) Electrical equipment complying with EN/IEC 61000-3-12 (European/International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤75 A per phase). 9.2 To connect the electrical wiring to the outdoor unit 1 Remove the switch box cover. 2× 2 1 1 2 Strip insulation (20 mm) from the wires. a b a Strip wire end to this point b An excessive strip length may cause electrical shock or leakage 3 Open the wire clamp. 4 Connect the interconnection cable and power supply as follows: 50 Hz 220-240 V c d f a b e a Interconnection cable b Power supply cable c Circuit breaker d Residual current device e Power supply

Installer reference guide 54 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 f Earth 1 2 3 3× 5 Tighten the terminal screws securely. We recommend using a Phillips screwdriver. 6 Install the switch box cover.

Installer reference guide 55 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 10 Finishing the outdoor unit installation 10.1 To finish the outdoor unit installation DANGER: RISK OF ELECTROCUTION ▪ Make sure that the system is earthed properly. ▪ Turn off the power supply before servicing. ▪ Install the switch box cover before turning on the power supply. NOTICE It is recommended that the refrigerant piping between indoor and outdoor unit is installed in a ducting or the refrigerant piping is wrapped with finishing tape. 1 Insulate and fix the refrigerant piping and cables as follows: g b a f e c d a Gas pipe b Gas pipe insulation c Interconnection cable d Field wiring (if applicable) e Liquid pipe f Liquid pipe insulation g Finishing tape 2 Install the service cover. 10.2 To close the outdoor unit NOTICE When closing the outdoor unit cover, make sure that the tightening torque does NOT exceed 1.3 N•m. 3× 1 1 2 2 2

Installer reference guide 56 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 11 Configuration 11.1 Facility setting Use this function for cooling at low outdoor temperature. This function is designed for facilities such as equipment of computer rooms. NEVER use in a residence or office where people occupy the space. Applicable for: RXM-R, ARXM-R, RXJ-N, RXA-B 11.1.1 To set the facility mode When cutting jumper J6 on the PCB, the operation range will expand to –15°C. The facility mode will stop if the outdoor temperature drops below –20°C and resume when the temperature rises again. To cut jumper J6 1 Remove the top plate of the outdoor unit. 2 Remove the front plate. 3 Remove the drip proof cover. 4 Cut jumper J6 on the outdoor unit PCB. J8 J7J5J9 J4J6 J12 b c d a a Front plate b Top plate c Drip proof cover d Jumpers INFORMATION ▪ The indoor unit may produce Intermittent noise due to the outdoor unit fan turning ON and/or OFF. ▪ Do NOT place humidifiers or other items which might raise humidity in rooms when you use the facility mode. ▪ Cutting jumper J6 sets the indoor unit fan to the highest speed. ▪ Do NOT use this setting in residences or offices with people. 11.2 Standby electricity saving function 11.2.1 About the standby electricity saving function This mode turns OFF the power supply of the outdoor unit and sets the indoor unit into the standby saving mode to reduce the power consumption of the unit. This mode is only applicable for outdoor units: RXM50+60R, ARXM50R and indoor units: FTXM, ATXM.

Installer reference guide 57 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 INFORMATION The standby electricity saving can ONLY be used for the units described above. WARNING Before connecting or disconnecting the connector, make sure the power supply is turned off. INFORMATION Selective connector for standby electricity saving is required if other than applicable indoor unit is connected. 11.2.2 To turn on standby electricity saving function Prerequisite: The main power supply MUST be turned off. 1 Remove the service cover. 2 Disconnect the selective standby electricity saving connector. 3 Turn on the main power supply.

Installer reference guide 58 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 12 Commissioning In this chapter 12.1 Precautions when commissioning.......................................................................................................................................... 58 12.2 Checklist before commissioning............................................................................................................................................. 58 12.3 Checklist during commissioning............................................................................................................................................. 59 12.4 To perform a test run ............................................................................................................................................................. 59 12.5 Starting up the outdoor unit .................................................................................................................................................. 60 12.1 Precautions when commissioning DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING CAUTION Do NOT perform the test operation while working on the indoor units. When performing the test operation, NOT only the outdoor unit, but the connected indoor unit will operate as well. Working on an indoor unit while performing a test operation is dangerous. CAUTION Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT remove the fan guard. When the fan is rotating at high speed, it will cause injury. NOTICE Be sure to turn on the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor. During test operation, the outdoor unit and the indoor units will start up. Make sure that the preparations of all indoor units are finished (field piping, electrical wiring, air purge, ...). See installation manual of the indoor units for details. 12.2 Checklist before commissioning After the installation of the unit, first check the items listed below. Once all checks are fulfilled, the unit must be closed. Power-up the unit after it is closed. The indoor unit is properly mounted. The outdoor unit is properly mounted. The system is properly earthed and the earth terminals are tightened. The power supply voltage matches the voltage on the identification label of the unit. There are NO loose connections or damaged electrical components in the switch box.

Installer reference guide 59 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 There are NO damaged components or squeezed pipes on the inside of the indoor and outdoor units. There are NO refrigerant leaks. The refrigerant pipes (gas and liquid) are thermally insulated. The correct pipe size is installed and the pipes are properly insulated. The stop valves (gas and liquid) on the outdoor unit are fully open. The following field wiring has been carried out according to this document and the applicable legislation between the outdoor unit and the indoor unit. Drainage Make sure drainage flows smoothly. Possible consequence: Condensate water might drip. The indoor unit receives the signals of the user interface. The specified wires are used for the interconnection cable. The fuses, circuit breakers, or locally installed protection devices are installed according to this document, and have NOT been bypassed. 12.3 Checklist during commissioning To perform an air purge. To perform a test run. 12.4 To perform a test run Prerequisite: Power supply MUST be in the specified range. Prerequisite: Test run may be performed in cooling or heating mode. Prerequisite: Test run should be performed in accordance with the operation manual of the indoor unit to make sure that all functions and parts are working properly. 1 In cooling mode, select the lowest programmable temperature. In heating mode, select the highest programmable temperature. Test run can be disabled if necessary. 2 When the test run is finished, set the temperature to a normal level. In cooling mode: 26~28°C, in heating mode: 20~24°C. 3 The system stops operating 3 minutes after the unit is turned OFF. INFORMATION ▪ Even if the unit is turned OFF, it consumes electricity. ▪ When the power turns back on after a power break, the previously selected mode will be resumed.

Installer reference guide 60 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 12.5 Starting up the outdoor unit See the indoor unit installation manual for configuration and commissioning of the system.

Installer reference guide 61 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 13 Hand-over to the user Once the test run is finished and the unit operates properly, please make sure the following is clear for the user: ▪ Make sure that the user has the printed documentation and ask him/her to keep it for future reference. Inform the user that he can find the complete documentation at the URL mentioned earlier in this manual. ▪ Explain the user how to properly operate the system and what to do in case of problems. ▪ Show the user what to do for the maintenance of the unit. ▪ Explain the user about energy saving tips as described in the operation manual.

Installer reference guide 62 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 14 Maintenance and service NOTICE Maintenance MUST be done by an authorized installer or service agent. We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals. NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO2 equivalent. Formula to calculate the quantity in CO2 equivalent tonnes: GWP value of the refrigerant × total refrigerant charge [in kg] / 1000 14.1 Overview: Maintenance and service This chapter contains information about: ▪ Maintenance safety precautions ▪ The yearly maintenance of the outdoor unit 14.2 Maintenance safety precautions DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING NOTICE: Risk of electrostatic discharge Before performing any maintenance or service work, touch a metal part of the unit in order to eliminate static electricity and to protect the PCB. WARNING ▪ Before carrying out any maintenance or repair activity, ALWAYS switch off the circuit breaker on the supply panel, remove the fuses or open the protection devices of the unit. ▪ Do NOT touch live parts for 10 minutes after the power supply is turned off because of high voltage risk. ▪ Please note that some sections of the electric component box are hot. ▪ Make sure you do NOT touch a conductive section. ▪ Do NOT rinse the unit. This may cause electric shocks or fire. 14.3 Checklist for yearly maintenance of the outdoor unit Check the following at least once a year:

Installer reference guide 63 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 ▪ Heat exchanger The heat exchanger of the outdoor unit can get blocked up due to dust, dirt, leaves, etc. It is recommended to clean the heat exchanger yearly. A blocked heat exchanger can lead to too low pressure or too high pressure leading to worse performance. 14.4 About the compressor When servicing the compressor keep in mind following precautions: DANGER: RISK OF ELECTROCUTION ▪ Use this compressor on a grounded system only. ▪ Turn the power off before servicing the compressor. ▪ Reattach the switch box cover and service lid after servicing. CAUTION Always wear safety goggles and protective gloves. DANGER: RISK OF EXPLOSION ▪ Use a pipe cutter to remove the compressor. ▪ Do NOT use the brazing torch. ▪ Use approved refrigerants and lubricants only. DANGER: RISK OF BURNING/SCALDING Do NOT touch the compressor with bare hands.

Installer reference guide 64 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 15 Troubleshooting 15.1 Overview: Troubleshooting This chapter describes what you have to do in case of problems. It contains information about solving problems based on symptoms. Before troubleshooting Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring. 15.2 Precautions when troubleshooting WARNING ▪ When carrying out an inspection on the switch box of the unit, ALWAYS make sure that the unit is disconnected from the mains. Turn off the respective circuit breaker. ▪ When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. NEVER shunt safety devices or change their values to a value other than the factory default setting. If you are unable to find the cause of the problem, call your dealer. DANGER: RISK OF ELECTROCUTION WARNING Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this appliance MUST NOT be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly turned ON and OFF by the utility. DANGER: RISK OF BURNING/SCALDING 15.3 Solving problems based on symptoms 15.3.1 Symptom: Indoor units fall, vibrate or make noise Possible causes Corrective action The indoor units are not installed securely Install the indoor units securely.

Installer reference guide 65 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 15.3.2 Symptom: The unit is NOT heating or cooling as expected Possible causes Corrective action Wrong connection of the electrical wires Connect the electrical wires correctly. Gas leakage Check for gas leakage. 15.3.3 Symptom: Water leakage Possible causes Corrective action Incomplete thermal insulation (gas and liquid piping, indoor portions of the drain hose extension) Make sure the thermal insulation of the piping and the drain hose is complete. Improperly connected drainage Secure the drainage. 15.3.4 Symptom: Electrical leakage Possible causes Corrective action The unit is NOT earthed correctly Check and correct the connection of the earth wiring. 15.3.5 Symptom: Unit does NOT function or burn damage Possible causes Corrective action The wiring was NOT performed in accordance with the specifications Correct the wiring. 15.4 Fault diagnosis using LED on outdoor unit PCB LED is… Diagnosis flashing Normal. ▪ Check the indoor unit. ON ▪ Turn the power OFF and back ON, and check the LED within approximately 3 minutes. If the LED is ON again, the outdoor unit PCB is faulty. OFF 1 Supply voltage (for power saving). 2 Power supply fault. 3 Turn the power OFF and back ON, and check the LED within approximately 3 minutes. If the LED is OFF again, the outdoor unit PCB is faulty. DANGER: RISK OF ELECTROCUTION ▪ When the unit is not operating, the LEDs on the PCB are turned off in order to save power. ▪ Even when the LEDs are off, the terminal block and the PCB may be powered.

Installer reference guide 66 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 16 Disposal NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. 16.1 Overview: Disposal Typical workflow Disposing of the system typically consists of the following stages: 1 Pumping down the system. 2 Bringing the system to a specialized treatment facility. INFORMATION For more details, see the service manual. 16.2 To pump down Example: To protect the environment, pump down when relocating the unit or when disposing of the unit. DANGER: RISK OF EXPLOSION Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leak in the refrigerant circuit: ▪ Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit. Possible consequence: Self- combustion and explosion of the compressor because of air going into the operating compressor. ▪ Use a separate recovery system so that the unit's compressor does NOT have to operate. NOTICE During pump down operation, stop the compressor before removing the refrigerant piping. If the compressor is still running and the stop valve is open during pump down, air will be sucked into the system. Compressor breakdown or damage to the system can result due to abnormal pressure in the refrigerant cycle. Pump down operation will extract all refrigerant from the system into the outdoor unit. 1 Remove the valve cap from the liquid stop valve and the gas stop valve. 2 Carry out forced cooling. See "16.3 To start and stop forced cooling" [4 67]. 3 After 5 to 10 minutes (after only 1 or 2 minutes in case of very low ambient temperatures (<−10°C)), close the liquid stop valve with a hexagonal wrench. 4 Check on the manifold if the vacuum is reached. 5 After 2-3 minutes, close the gas stop valve and stop forced cooling.

Installer reference guide 67 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 c b e d d a a Gas stop valve b Closing direction c Hexagonal wrench d Valve cap e Liquid stop valve 16.3 To start and stop forced cooling There are 2 methods to perform forced cooling. ▪ Method 1. Using the indoor unit ON/OFF switch (if present on the indoor unit). ▪ Method 2. Using the indoor unit user interface. 16.3.1 To start and stop forced cooling using the indoor unit ON/OFF switch 1 Press the ON/OFF switch for at least 5 seconds. Result: Operation will start. INFORMATION Forced cooling stops automatically after 15 minutes. 2 To stop operation sooner, press the ON/OFF switch. 16.3.2 To start and stop forced cooling using the indoor unit user interface 1 Set the operation mode to cooling. Refer to "To perform a test run" in the installation manual of the indoor unit. Note: Forced cooling will stop automatically after around 30 minutes. 2 To stop operation sooner, press the ON/OFF switch. INFORMATION If forced cooling is used and the outside temperature is <−10°C, the safety device may prevent operation. Warm the outside temperature thermistor on the outdoor unit to ≥−10°C. Result: Operation will start.

Installer reference guide 68 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 17 Technical data ▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of latest technical data is available on the Daikin Business Portal (authentication required). 17.1 Wiring diagram The wiring diagram is delivered with the unit, located inside of the outdoor unit (bottom side of the top plate). 17.1.1 Unified wiring diagram legend For applied parts and numbering, refer to the wiring diagram on the unit. Part numbering is by Arabic numbers in ascending order for each part and is represented in the overview below by "*" in the part code. Symbol Meaning Symbol Meaning Circuit breaker Protective earth Connection Protective earth (screw) , Connector A Rectifier Earth Relay connector Field wiring Short-circuit connector Fuse Terminal INDOOR Indoor unit Terminal strip OUTDOOR Outdoor unit Wire clamp Residual current device Symbol Colour Symbol Colour BLK Black ORG Orange BLU Blue PNK Pink BRN Brown PRP, PPL Purple GRN Green RED Red GRY Grey WHT White YLW Yellow Symbol Meaning A*P Printed circuit board BS* Pushbutton ON/OFF, operation switch

Installer reference guide 69 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 Symbol Meaning BZ, H*O Buzzer C* Capacitor AC*, CN*, E*, HA*, HE*, HL*, HN*, HR*, MR*_A, MR*_B, S*, U, V, W, X*A, K*R_*, NE Connection, connector D*, V*D Diode DB* Diode bridge DS* DIP switch E*H Heater FU*, F*U, (for characteristics, refer to PCB inside your unit) Fuse FG* Connector (frame ground) H* Harness H*P, LED*, V*L Pilot lamp, light emitting diode HAP Light emitting diode (service monitor green) HIGH VOLTAGE High voltage IES Intelligent eye sensor IPM* Intelligent power module K*R, KCR, KFR, KHuR, K*M Magnetic relay L Live L* Coil L*R Reactor M* Stepper motor M*C Compressor motor M*F Fan motor M*P Drain pump motor M*S Swing motor MR*, MRCW*, MRM*, MRN* Magnetic relay N Neutral n=*, N=* Number of passes through ferrite core PAM Pulse-amplitude modulation PCB* Printed circuit board PM* Power module PS Switching power supply PTC* PTC thermistor Q* Insulated gate bipolar transistor (IGBT ) Q*C Circuit breaker

Installer reference guide 70 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 Symbol Meaning Q*DI, KLM Earth leak circuit breaker Q*L Overload protector Q*M Thermo switch Q*R Residual current device R* Resistor R*T Thermistor RC Receiver S*C Limit switch S*L Float switch S*NG Refrigerant leak detector S*NPH Pressure sensor (high) S*NPL Pressure sensor (low) S*PH, HPS* Pressure switch (high) S*PL Pressure switch (low) S*T Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S Surge arrester SR*, WLU Signal receiver SS* Selector switch SHEET METAL Terminal strip fixed plate T*R Transformer TC, TRC Transmitter V*, R*V Varistor V*R Diode bridge, Insulated-gate bipolar transistor (IGBT) power module WRC Wireless remote controller X* Terminal X*M Terminal strip (block) Y*E Electronic expansion valve coil Y*R, Y*S Reversing solenoid valve coil Z*C Ferrite core ZF, Z*F Noise filter

Installer reference guide 71 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 17.2 Piping diagram 17.2.1 Piping diagram: Outdoor unit PED categories of equipment: ▪ High pressure switch: category IV, ▪ Compressor: category II; ▪ Other equipment: art. 4§3. HPS 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 9.5 CuT 6.4 CuT 9.5 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 4.0 CuT 4.0 CuT 9.5 CuT 12.7 CuT 12.7 CuT RXP50M, RXF50B, ARXF50A b a c d f h g j1 j3 j2 k m m m m m n o e l i i M a Liquid field piping j3 Discharge pipe thermistor b Gas field piping k Heat exchanger c Liquid stop valve l 4-way valve (ON: heating) d Gas stop valve m Muffler e Liquid receiver n Compressor f Filter o Accumulator g Electronic expansion valve HPS High pressure switch (automatic reset) h Muffler with filter M Propeller fan i Capillary tube Refrigerant flow: cooling j1 Outdoor temperature thermistor Refrigerant flow: heating j2 Heat exchanger thermistor

Installer reference guide 72 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 12.7 CuT 12.7 CuT 9.5 CuT 9.5 CuT 12.7 CuT 12.7 CuT 15.9 CuT 15.9 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 4.0 CuT 4.0 CuT 4.0 CuT 12.7 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT b a c d m m l n M o o f h i k i i g j1 j2 j3 RXM71R HPS 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 9.5 CuT 6.4 CuT 9.5 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 4.0 CuT 4.0 CuT 4.0 CuT 9.5 CuT 12.7 CuT 12.7 CuT 6.4 CuT RXP60M, RXP71M, RXF60B, RXF71A, ARXF60A, ARXF71A b a c d f h g j1 j3 j2 k m m m m m n M o e l i i i a Liquid field piping j3 Discharge pipe thermistor b Gas field piping k Heat exchanger c Liquid stop valve l 4-way valve (ON: heating) d Gas stop valve m Muffler e Liquid receiver n Compressor f Filter o Accumulator g Electronic expansion valve HPS High pressure switch (automatic reset) h Muffler with filter M Propeller fan i Capillary tube Refrigerant flow: cooling j1 Outdoor temperature thermistor Refrigerant flow: heating j2 Heat exchanger thermistor

Installer reference guide 73 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 12.7 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 15.9 CuT 9.5 CuT 9.5 CuT 9.5 CuT 9.5 CuT 6.4 CuT 6.4 CuT 6.4 CuT 4.0 CuT 4.0 CuT 4.0 CuT 6.4 CuT 6.4 CuT 6.4 CuT l m j3 M n o e m m d c b a f h g j1 i i i j2 k ARXM71R M HPS 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 6.4 CuT 9.5 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 4.0 CuT 4.0 CuT 4.0 CuT 9.5 CuT 9.5 CuT 6.4 CuT 12.7 CuT b a c d m m m j3 n o l e j1 i i i j2 k f h g RXJ50N, RXA42B, RXA50B a Liquid field piping j3 Discharge pipe thermistor b Gas field piping k Heat exchanger c Liquid stop valve l 4-way valve (ON: heating) d Gas stop valve m Muffler e Liquid receiver n Compressor f Filter o Accumulator g Electronic expansion valve HPS High pressure switch (automatic reset) h Muffler with filter M Propeller fan i Capillary tube Refrigerant flow: cooling j1 Outdoor temperature thermistor Refrigerant flow: heating j2 Heat exchanger thermistor

Installer reference guide 74 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 12.7 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 12.7 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 4.0 CuT 4.0 CuT 4.0 CuT 7.0 CuT 7.0 CuT 9.5 CuT 9.5 CuT 9.5 CuT 9.5 CuT b a c d f h g j1 j3 j2 k m m m n M o e l i i i RXM50R, RXM60R, ARXM50R, ARXM60R 12.7 CuT 12.7 CuT 9.5 CuT 9.5 CuT 9.5 CuT 9.5 CuT 9.5 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 6.4 CuT 12.7 CuT 12.7 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT 7.0 CuT j3 b a c d f h g j1 i i i 4.0 CuT 4.0 CuT 4.0 CuT j2 m m m n M o e l k RXM42R a Liquid field piping j3 Discharge pipe thermistor b Gas field piping k Heat exchanger c Liquid stop valve l 4-way valve (ON: heating) d Gas stop valve m Muffler e Liquid receiver n Compressor f Filter o Accumulator g Electronic expansion valve HPS High pressure switch (automatic reset) h Muffler with filter M Propeller fan i Capillary tube Refrigerant flow: cooling j1 Outdoor temperature thermistor Refrigerant flow: heating j2 Heat exchanger thermistor

Installer reference guide 75 ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B + RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B R32 split series 4P513661-9J – 2020.05 18 Glossary Dealer Sales distributor for the product. Authorised installer Technical skilled person who is qualified to install the product. User Person who is owner of the product and/or operates the product. Applicable legislation All international, European, national and local directives, laws, regulations and/or codes that are relevant and applicable for a certain product or domain. Service company Qualified company which can perform or coordinate the required service to the product. Installation manual Instruction manual specified for a certain product or application, explaining how to install, configure and maintain it. Operation manual Instruction manual specified for a certain product or application, explaining how to operate it. Maintenance instructions Instruction manual specified for a certain product or application, which explains (if relevant) how to install, configure, operate and/or maintain the product or application. Accessories Labels, manuals, information sheets and equipment that are delivered with the product and that need to be installed according to the instructions in the accompanying documentation. Optional equipment Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation. Field supply Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.