Page 1 Service manual Split Emura 3 R32 RXJ20A5V1B FTXJ20A2V1BW FTXJ20A2V1BS FTXJ20A2V1BB RXJ25A5V1B FTXJ25A2V1BW FTXJ25A2V1BS FTXJ25A2V1BB RXJ35A5V1B FTXJ35A2V1BW FTXJ35A2V1BS FTXJ35A2V1BB RXJ42A2V1B FTXJ42A2V1BW FTXJ42A2V1BS FTXJ42A2V1BB RXJ50A2V1B FTXJ50A2V1BW FTXJ50A2V1BS FTXJ50A2V1BB...
Page 2 The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V.. Daikin Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services presented therein.
Page 3 Version log Version log Version code Description Date ESIE22-04 Document release June 2022 ESIE22-04A See below August 2022 The following updates have been applied to the Service Manual: • Technical data – Field settings indoor unit: To retrieve the field settings via the wireless remote controller ARC488A1 updated.
Page 4: Table Of Contents
Table of Contents Table of Contents 1 Safety precautions Meaning of warnings and symbols..........................Dangers ................................... Warnings ..................................Cautions ..................................14 Notices .................................... 14 2 General operation 3 Troubleshooting To display the error code on the wireless remote controller..................16 To reset the error code via remote controller .......................
Page 5 Table of Contents 4 Components 4-way valve..................................53 4.1.1 Checking procedures ............................53 4.1.2 Repair procedures ............................57 Compressor ..................................62 4.2.1 Checking procedures ............................62 4.2.2 Repair procedures ............................68 Compressor thermal protector............................77 4.3.1 Checking procedures ............................77 4.3.2 Repair procedures ............................
Page 6 Table of Contents External factors ................................192 5.3.1 Checking procedures ............................192 6 Maintenance To clean the outdoor unit heat exchanger........................193 To clean the indoor unit heat exchanger ........................193 To clean the indoor unit heat exchanger in extreme condition ..................194 To clean the indoor unit and wireless remote control ....................
Page 7: Safety Precautions
Safety precautions 1 Safety precautions The precautions described in this document cover very important topics, follow them carefully. All activities described in the service manual must be performed by an authorized person. If you are NOT sure how to install, operate or service the unit, contact your dealer. 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, …...
Page 8: Dangers
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 Do NOT apply any permanent inductive or capacitance loads to the circuit without ensuring that this will NOT exceed the permissible voltage and current permitted for the equipment in use.
Page 9 WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). WARNING Make sure the work site environment is clean and safe to work in. Beware of spilled fluids, like water, oil or other substances.
Page 10 Safety precautions WARNING Make sure the total refrigerant charge is in accordance with the room size in which the unit is installed: please consult the detailed instructions on charging and allowed room sizes in the installation manual. WARNING ▪ NEVER mix different refrigerants or allow air to enter the refrigerant system. ▪...
Page 11 Safety precautions WARNING ▪ In order to prevent oxygen deficiency and R32 combustion, keep the room well- ventilated for a healthy work environment. Do NOT work in a confined space. If a refrigerant leak is detected in a confined room or an inadequately ventilated location, do NOT start the work until the area has been ventilated appropriately.
Page 12 Safety precautions WARNING ▪ The area MUST be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres. ▪ Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e.
Page 13 Safety precautions 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. WARNING Prior to start working on systems containing flammable refrigerant, safety checks are necessary to ensure that the risk of ignition is minimised.
Page 14: Cautions
Safety precautions 1.4 Cautions CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system. CAUTION To avoid injury, 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. ▪...
Page 15: General Operation
General operation 2 General operation The Split Emura 3 is typically used for cooling or heating in residential applications. The medium which is used to transfer the heat from inside to outside or vice versa, is refrigerant R32. a Compressor b Indoor heat exchanger c Expansion valve d Outdoor heat exchanger...
Page 16: Troubleshooting
Troubleshooting 3 Troubleshooting 3.1 To display the error code on the wireless remote controller 1 Press to enter the main menu and navigate to the wireless remote control settings menu using Wireless remote control setting menu Software version (self-diagnosis menu) 2 Press to enter the menu.
Page 17: To Reset The Error Code Via Outdoor Unit
Troubleshooting Software and version menu 5 Keep pressed for at least 5 seconds. Result: Software and version menu is entered. 6 Navigate to the self‑diagnosis menu using Self‑diagnosis menu 7 Keep pressed for at least 5 seconds. Result: Self‑diagnosis menu is entered. 8 Enter password 5902 using 9 Press to confirm password.
Page 18: To Perform A Test Run
Troubleshooting 3.4 To perform a test run INFORMATION If the unit runs into an error during commissioning, see the service manual for the detailed troubleshooting guidelines. 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.
Page 19: Error Based Troubleshooting
Troubleshooting Test run OFF Test run ON During test run Result: Test run operation will stop automatically after about 30 minutes. 8 Test run mode will stop if the ON/OFF button is pressed. Result: The indoor units leave test operation mode. 9 Check the function of operation modes.
Page 20: A5-00 - Outdoor Unit: High Pressure Peak Cut / Freeze Protection Problem
Troubleshooting 4 Perform a check of the indoor unit main PCB. See "4.9 Indoor unit main PCB" [ 103]. Possible cause: Faulty indoor unit main PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.
Page 21: A6-00 - Indoor Unit Fan Motor Abnormality
Troubleshooting 3.5.3 A6-00 – Indoor unit fan motor abnormality Trigger Effect Reset The rotation speed of the Unit will stop operating. Power reset via the fan motor is NOT outdoor unit. detected while the output voltage to the fan is at its maximum.
Page 22: C4-00 - Heat Exchanger Temperature Sensor Problem
Troubleshooting 3.5.5 C4-00 – Heat exchanger temperature sensor problem Trigger Effect Reset Refrigerant liquid Unit will stop operating. Power reset. thermistor detects an open or short circuit during compressor operation. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the indoor unit heat exchanger thermistor.
Page 23: Humidity Sensor Abnormality
Troubleshooting 3.5.7 CC-00 – Humidity sensor abnormality Trigger Effect Reset ▪ Disconnected sensor Unit will stop operating. Manual reset via user interface. ▪ Broken sensor ▪ Communication error To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the humidity sensor.
Page 24 Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the main PCB. See "4.12 Main PCB" [ 117]. Possible cause: Faulty main PCB. 2 Check if the power supply is compliant with the regulations. See "5.1 Electrical circuit" [ 180].
Page 25: E3-00 - Outdoor Unit: Actuation Of High Pressure Switch
Troubleshooting 3.5.10 E3-00 – Outdoor unit: Actuation of high pressure switch Trigger Effect Reset High pressure switch Unit will stop operating. Manual reset via user opens due to measured interface. pressure above high pressure switch operating point. High pressure control (measured pressure just below high pressure switch operating point)
Page 26: E5-00 - Outdoor Unit: Overheat Of Inverter Compressor Motor
Troubleshooting 3.5.11 E5-00 – Outdoor unit: Overheat of inverter compressor motor Trigger Effect Reset Compressor overload is Unit will NOT stop Automatic reset if the unit detected. operating. runs without warning for 60 seconds. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check that all stop valves of the refrigerant circuit are open.
Page 27: E6-00 - Outdoor Unit: Compressor Startup Defect
Troubleshooting 3.5.12 E6-00 – Outdoor unit: Compressor startup defect Trigger Effect Reset The motor rotor does Unit will NOT stop Automatic reset after a NOT rotate when the operating. continuous run for compressor is energized. 10 minutes. Unit will stop operating Manual reset via user interface.
Page 28: E7-00 - Outdoor Unit: Malfunction Of Outdoor Unit Fan Motor
Troubleshooting 3.5.13 E7-00 – Outdoor unit: Malfunction of outdoor unit fan motor Trigger Effect Reset Fan does NOT start Unit will stop operating. Manual reset via user 15~30 seconds after ON interface. signal. It can occur that the error code is triggered when the fan motor is running caused by a faulty rotating sensor signal.
Page 29: Outdoor Unit: Cool/Heat Switchover Problem
Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%), ▪ Power drop, ▪ Short circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.
Page 30: F3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Temperature
Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.5.16 F3-00 – Outdoor unit: Malfunction of discharge pipe temperature Trigger Effect Reset Discharge pipe thermistor Unit will NOT stop Automatic reset when detects a too high operating.
Page 31: F6-00 - Outdoor Unit: Abnormal High Pressure In Cooling
Troubleshooting 3.5.17 F6-00 – Outdoor unit: Abnormal high pressure in cooling Trigger Effect Reset Outdoor heat exchanger Unit will NOT stop Automatic reset when thermistor measures a operating. temperature drops. too high temperature. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Clean the outdoor heat exchanger.
Page 32: H0-00 - Outdoor Unit: Voltage/Current Sensor Problem
Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check that all stop valves of the refrigerant circuit are open. See "5.2 Refrigerant circuit" [ 182]. Possible cause: Closed stop valve in the refrigerant circuit. 2 Check if the refrigerant circuit is correctly charged.
Page 33: H3-00 - Outdoor Unit: Malfunction Of High Pressure Switch
Troubleshooting 3 Wait until the rectifier voltage is below 10 V DC. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. 4 Check that the thermal interface grease is applied properly on the (PCB or refrigerant piping) contact surface of the heat sink.
Page 34: H6-00 - Outdoor Unit: Malfunction Of Position Detection Sensor
Troubleshooting 3.5.21 H6-00 – Outdoor unit: Malfunction of position detection sensor Trigger Effect Reset Compressor fails to start Unit will NOT stop Automatic reset after a within 15 seconds after operating. continuous operation of the compressor run 10 minutes. command signal is sent. If the error re-occurs Manual reset via user within 8 minutes: unit will...
Page 35: H8-00 - Outdoor Unit: Malfunction Of Compressor Input System
Troubleshooting 3.5.22 H8-00 – Outdoor unit: Malfunction of compressor input system Trigger Effect Reset DC voltage or current Unit will NOT stop Automatic reset when sensor abnormality based operating. compressor runs normally on the compressor for 60 minutes. running frequency and If the error re-occurs too Manual reset via user the input current.
Page 36: J3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Thermistor
Troubleshooting 3.5.24 J3-00 – Outdoor unit: Malfunction of discharge pipe thermistor Trigger Effect Reset Discharge pipe thermistor Unit will stop operating. Manual reset via user input is out of range. interface. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform check discharge...
Page 37: L4-00 - Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise
Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the main PCB. See "4.12 Main PCB" [ 117]. Possible cause: Faulty main PCB. 2 Perform a check of the outdoor unit fan motor. See "4.13 ...
Page 38: L5-00 - Outdoor Unit: Inverter Instantaneous Overcurrent
Troubleshooting Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 4 Wait until the rectifier voltage is below 10 V DC. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 39: P4-00 - Outdoor Unit: Malfunction Of Radiating Fin Temperature Sensor
Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%), ▪ Power drop, ▪ Short circuit. Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 8 Wait until the rectifier voltage is below 10 V DC.
Page 40: U2-00 - Outdoor Unit: Defect Of Power Supply Voltage
Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform check refrigerant side thermistors. "4.19 Thermistors" [ 169]. Possible cause: Faulty refrigerant side thermistor(s). 2 Check that all stop valves of the refrigerant circuit are open. See "5.2 Refrigerant circuit" [ 182].
Page 41: U4-00 - Indoor/Outdoor Unit Communication Problem
Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%), ▪ Power drop, ▪ Short circuit. 2 Perform a check of the compressor. See "4.2 Compressor" [ 62]. Possible cause: Faulty compressor or miswiring of the compressor power supply cable.
Page 42: U5-00 - Communication Abnormality Between Indoor Unit Main Pcb And Remote Controller
Troubleshooting 2 Perform a check of the power supply, connections, wiring,… between the outdoor unit and the indoor unit. See "5.1 Electrical circuit" [ 180]. Possible cause: Faulty wiring between the outdoor unit and the indoor unit. 3 Perform a check of the main PCB. See "4.12 Main PCB" [ 117].
Page 43: Indoor Unit, Outdoor Unit Mismatching Problem
Troubleshooting 2 Perform a check of the remote controller. See documentation of the specific remote controller for more information. Possible cause: Faulty remote controller. 3 Perform a check of the indoor unit main PCB. See "4.9 Indoor unit main PCB" [ 103].
Page 44: Malfunction Of System
Troubleshooting 3.5.35 UH-00 – Malfunction of system Trigger Effect Reset In case of connection with Unit will stop operating. Auto reset. multi indoor units, when error UA, U0 or A5 occurs in other indoor unit. To solve the error code INFORMATION It is recommended to perform the checks in the listed order.
Page 45: Symptom Based Troubleshooting
Troubleshooting 3.6 Symptom based troubleshooting 3.6.1 Operation does not start Check Detail When the operation lamp is off, there is ▪ Is the power supply breaker ON? a power failure. ▪ Do other electrical appliances work? Check the power supply. ▪...
Page 46: Operation Starts But The Unit Does Not Cool/Heat
Troubleshooting Check Detail Check the outdoor temperature. ▪ Heating operation cannot be used when the outdoor temperature is 18°C WB or higher. ▪ Cooling operation cannot be used when the outdoor temperature is below −10°C DB. When the operation lamp blinks, there "3.5 Error based may be an error code, activating the troubleshooting" [...
Page 47: Operating Noise And Vibrations
Troubleshooting Check Detail Check the installation conditions ▪ Does installed model (specified in the installation manual). sufficient capacity? ▪ Is there a short circuit air flow caused by insufficient installation space? Check the outdoor temperature. ▪ Heating operation cannot be used when the outdoor temperature is 18°C WB or higher.
Page 48: Abnormal High Pressure
Troubleshooting 3.6.5 Abnormal high pressure In cooling mode Check item Detail Does the outdoor unit fan run Visual inspection normally? Is the outdoor unit heat exchanger Visual inspection clogged? Is there clogging before or after the ▪ Check if there is a temperature expansion valve (capillary)? difference before and after expansion valve (capillary).
Page 49: Abnormal Low Pressure
Troubleshooting Check item Detail Is the refrigerant overcharged? Conduct refrigerant collection and vacuum drying, and then add proper amount refrigerant. 3.6.6 Abnormal low pressure Abnormally low pressure level is mostly caused by the evaporator side. The following contents are provided based on field checking of service engineer. Further, the number is listed in the order of degree of influence.
Page 50: Indoor Fan Starts Operating But The Compressor Does Not Operate
Troubleshooting Check item Detail Is the outdoor unit installed under such Visual inspection conditions that short circuit easily occurs? Is there a shortage of refrigerant? Conduct refrigerant collection and vacuum drying, and then add proper amount refrigerant. 3.6.7 Indoor fan starts operating but the compressor does not operate Check Detail Check the power supply.
Page 51: Operation Starts And The Unit Stops Immediately
Troubleshooting 3.6.8 Operation starts and the unit stops immediately Check Detail Check the power supply. ▪ Is the capacity of the safety breaker as specified? ▪ If the earth leakage breaker is too sensitive, then increase the set value of the earth leakage current of the breaker or replace the breaker.
Page 52: Unit Discharges White Mist
Ceiling too high for the floor size. ▪ Short circuit air flow caused by insufficient installation space. Check the installation. ▪ Is the proper humidification hose, specified by Daikin, used? ▪ Breakage blockage humidification hose. ▪ Is the length of the humidification hose correct (within specified length)? ▪...
Page 53: Components
Components 4 Components CAUTION When replacing a component ALWAYS make sure the correct spare part for your unit is installed. 4.1 4-way valve 4.1.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a mechanical check of the 4-way valve Prerequisite: Stop the unit operation via the user interface.
Page 54 Components Is the measured value correct? Action Replace the 4‑way valve coil, see "4.1.2 Repair procedures" [ 57]. When outdoor temperature is mild and unit can switch between heating and cooling INFORMATION This procedure is ONLY possible when the outdoor temperature is within the temperature range for both Heating and Cooling operation mode.
Page 55 Components 2 Turn ON the power using the respective circuit breaker. 3 With the unit operating, connect the service monitoring tool to the unit and check whether the unit is operating in Heating or Cooling mode. 4 With the 4‑way valve connector connected to the PCB, measure the voltage on the 4‑way valve connection of the PCB.
Page 56 Components INFORMATION The flow through the 4-way valve is correct if the water temperature after the heat exchanger rises/drops when operating in Heating/Cooling mode. Is the flow correct? Action Skip the next step of this procedure. Perform the next step of this procedure. 3 Connect a manifold to one of the service ports of the refrigerant circuit and check the pressure (suction, discharge).
Page 57: Repair Procedures
Components INFORMATION The flow through the 4-way valve is correct if the water temperature after the heat exchanger rises/drops when operating in Heating/Cooling mode. Is the flow correct? Action 4‑way valve is OK. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 58 Components A Class 42+50 unit a Screw b 4‑way valve coil c 4‑way valve body 2 Cut all tie straps that fix the 4‑way valve coil harness. 3 Unplug the 4-way valve connector from the appropriate PCB. 4 To install the 4‑way valve coil, see "4.1.2 Repair procedures" [ 57].
Page 59 Components A Class 42+50 unit a 4‑way valve pipe b 4‑way valve c Putty 5 Stop the nitrogen supply when the piping has cooled down. 6 Remove the 4‑way valve. INFORMATION It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to remove the remaining component pipe end(s) from the refrigerant pipes by heating the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
Page 60 Components A Class 20~35 unit a 4‑way valve pipe b 4‑way valve c Putty A Class 42+50 unit a 4‑way valve pipe b 4‑way valve c Putty CAUTION Overheating the valve will damage or destroy it. 6 After soldering is done, stop the nitrogen supply after the component has cooled‑down.
Page 61 Components A Class 20~35 unit a Screw b 4‑way valve coil c 4‑way valve body A Class 42+50 unit a Screw b 4‑way valve coil c 4‑way valve body 2 Install and tighten the screw to fix the 4‑way valve coil. 3 Route the 4‑way valve coil harness towards the appropriate PCB.
Page 62: Compressor
Components 4.2 Compressor 4.2.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform an auditive check of the compressor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.14 Plate work" [...
Page 63 Components 2 Visually check: ▪ For oil drops around the compressor. Locate and fix as needed. ▪ Pipes for signs of damage. Replace pipes as needed. 3 Check that the compressor bolts are correctly fixed. Fix as needed. 4 Check that the compressor wire terminals cover is correctly installed and fixed.
Page 64 Components A Class 20~35 unit a Compressor wire terminals cover A Class 42+50 unit a Compressor wire terminals cover 3 Disconnect the Faston connectors from the compressor wire terminals U, V and W. INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation.
Page 65 Components U Wire terminal U V Wire terminal V W Wire terminal W CAUTION Before measuring the compressor motor windings resistance, measure the resistance of the multimeter probes by holding the probes against each other. If the measured resistance is NOT 0 Ώ, this value MUST be subtracted from the measured winding resistance.
Page 66 Components U Wire terminal U V Wire terminal V W Wire terminal W 7 Install the compressor wire terminals cover. 8 Install the compressor insulation. 9 Turn ON the power using the respective circuit breaker. 10 Start the unit operation via the user interface. CAUTION NEVER operate the compressor with the compressor wire terminals cover removed.
Page 67 Components To perform an insulation check of the compressor Prerequisite: First perform an electrical check of the compressor, see "4.2.1 Checking procedures" [ 62]. Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Before proceeding: DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 68: Repair Procedures
Components INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation. U Wire terminal U V Wire terminal V W Wire terminal W 4 Set the Megger voltage to 500 V DC or 1000 V DC. 5 Measure the insulation resistance between the following terminals.
Page 69 Components a String b Body jacket (outer) c Top insulation d Secondary (inner) body jacket 2 Open the body jacket. 3 Remove the top insulation from the compressor. 4 Open the secondary body jacket from the compressor. 5 Remove the body jackets from the compressor. 6 To install the compressor insulation, see "4.2.2 Repair procedures" [...
Page 70 Components Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see "5.2.2 Repair procedures" [ 187]. 1 If needed, remove any parts to create more space for the removal of the compressor. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 71 Components U Wire terminal U V Wire terminal V W Wire terminal W 4 Remove the compressor thermal protector, see "To remove the compressor thermal protector" [ 79]. 5 Remove the putty from the compressor accumulator. Keep for reuse. 6 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa.
Page 72 Components A Class 42+50 unit a Compressor pipe 8 Stop the nitrogen supply when the piping has cooled down. INFORMATION It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to remove the remaining component pipe end(s) from the refrigerant pipes by heating the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
Page 73 Components A Class 42+50 unit a Nut b Compressor c Damper 10 Remove the 3 dampers from the compressor. INFORMATION The compressor dampers may look different. 11 Remove the bushings and keep them for re-use. 12 Install plugs or caps on the open pipe ends of the refrigerant piping to avoid dirt or impurities from entering the piping.
Page 74 Components A Class 20~35 unit a Nut b Compressor c Damper A Class 42+50 unit a Nut b Compressor c Damper INFORMATION The compressor dampers may look different. 7 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa.
Page 75 Components A Class 20~35 unit a Compressor pipe A Class 42+50 unit a Compressor pipe CAUTION Overheating the compressor pipes (and the oil inside the compressor pipes) will damage or destroy the compressor. 9 After soldering is done, stop the nitrogen supply after the component has cooled‑down.
Page 76 Components U Wire terminal U V Wire terminal V W Wire terminal W 13 Install the cover of the compressor wire terminals. A Class 20~35 unit a Compressor wire terminals cover A Class 42+50 unit RXJ20~50A + FTXJ-A(W)(S)(B) Service manual Split Emura 3 R32 ESIE22-04B –...
Page 77: Compressor Thermal Protector
Components a Compressor wire terminals cover 14 Install the compressor insulation, see "4.2.2 Repair procedures" [ 68]. 15 Perform a pressure test, see "5.2.1 Checking procedures" [ 182]. 16 Add refrigerant refrigerant circuit, "5.2.2 Repair procedures" [ 187]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 78 Components A Class 42+50 unit a Compressor wire terminals cover 2 Remove the compressor thermal protection with bracket from the compressor. a Compressor thermal protector b Faston connector c Bracket 3 If in doubt, measure the temperature of the compressor thermal protection. Result: The temperature MUST be below 85°C.
Page 79: Repair Procedures
Components 8 Again measure the resistance on the compressor thermal protector. Result: The contact MUST be closed (measured resistance = 0 Ω). Does the compressor thermal protector Action contact open and close at the correct temperature? Return to the troubleshooting of the specific error and continue with the next procedure.
Page 80 Components A Class 42+50 unit a Compressor wire terminals cover 2 Remove the compressor thermal protector with bracket from the compressor housing. a Compressor thermal protector b Faston connector c Bracket 3 Disconnect the Faston connectors from the compressor thermal protector. 4 Separate the compressor thermal protector and the compressor thermal protector bracket.
Page 81 Components 5 To install compressor thermal protector, "4.2.2 Repair procedures" [ 68]. To install the compressor thermal protector 1 Install the compressor thermal protector on the compressor thermal protector bracket. a Compressor thermal protector b Compressor thermal protector bracket 2 Connect the Faston connectors to the compressor thermal protector. a Compressor thermal protector b Faston connector c Bracket...
Page 82: Expansion Valve
Components A Class 20~35 unit a Compressor wire terminals cover A Class 42+50 unit a Compressor wire terminals cover 5 Install the compressor insulation. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 83 Components To perform a mechanical check of the expansion valve Prerequisite: Power OFF the unit for 3 minutes. Then turn ON the unit and listen to the expansion valve assembly. If the expansion valve does NOT make a latching sound, continue with the electrical check of the expansion valve, see "4.4.1 Checking procedures" [ 82].
Page 84 Components INFORMATION Below are shown examples of the resistance measurements in which the common wire is connected to pin 5 or to pin 6 of the expansion valve coil connector. Connections may differ according to the type of expansion valve. ▪...
Page 85 Components To perform an operation check of the expansion valve Prerequisite: First perform an electrical check of the expansion valve, see "4.4.1 Checking procedures" [ 82]. 1 Turn ON the power of the unit. INFORMATION When power is switched ON, PCB checks all expansion valve coil windings by current check.
Page 86: Repair Procedures
Components Is the flow through the expansion valve Action correct? Component is OK. Return to the troubleshooting of the specific error and continue with the next step. Replace the expansion valve, see "4.4.2 Repair procedures" [ 86]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required.
Page 87 Components A Class 42+50 unit a Expansion valve coil b Expansion valve coil harness 3 Cut all tie straps that fix the expansion valve coil harness. 4 Disconnect the expansion valve coil connector S20 from the main PCB. 5 Remove the expansion valve coil (and harness) from the unit. 6 To install the expansion valve coil, see "4.4.2 Repair procedures" [...
Page 88 Components A Class 42+50 unit a Putty b Expansion valve pipe c Expansion valve body 3 Using a valve magnet, open the expansion valve. 4 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa. 5 Wrap a wet rag around the components near the expansion valve pipes. Heat the brazing points of the expansion valve pipes using an oxygen acetylene torch and remove the expansion valve pipes from the refrigerant pipes using pliers.
Page 89 Components 7 After soldering is done, stop the nitrogen supply after the component has cooled‑down. A Class 20~35 unit a Putty b Expansion valve pipe c Expansion valve body A Class 42+50 unit a Putty b Expansion valve pipe c Expansion valve body 8 Reinstall the putty.
Page 90: Front Panel Motor
Components a Expansion valve coil b Pipe retention clip c Pipe 2 Route the expansion valve coil harness towards the appropriate PCB. 3 Connect the expansion valve coil connector to the appropriate PCB. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 91 Components a Connector on indoor unit main PCB b Connector on switch box 2 Measure the continuity of all wires of the wiring harness between the disconnected connector and the connector on the switch box. Is the wiring harness OK? Action Continue with the next step.
Page 92: Repair Procedures
Components 4.5.2 Repair procedures INFORMATION To replace the motor, the complete gearcase assembly MUST be replaced. To remove the front panel motor gearcase assembly Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.14 Plate work" [...
Page 93 Components a Connector b Connector holder c Screw (front panel motor gearcase assy) d Front panel motor gearcase assy 2 Install the 2 screws to fix the front panel motor and gears assembly. Do NOT yet tighten the screws. 3 Make sure the lever is correctly connected (using soft tools) at the front side of the front grille.
Page 94 Components a Wifi control PCB b Connector on indoor unit main PCB c Connector on switch box 5 Route the wiring harness out of the harness retainer (top of the switch box) and remove the front panel motor wiring harness. 6 To install the front panel motor wiring harness, see "4.5.2 ...
Page 95: High Pressure Switch
Components 4.6 High pressure switch 4.6.1 Checking procedures To perform an electrical check of the high pressure switch Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.14 Plate work" [ 144].
Page 96: Repair Procedures
Components 8 Measure the resistance between the Faston connections of the high pressure switch. Result: The switch MUST be open. 9 Lower the pressure of the nitrogen in the refrigerant circuit just below reset pressure of the high pressure switch. 10 Measure the resistance between the Faston connections of the high pressure switch.
Page 97 Components a High pressure switch b Faston connector c High pressure switch pipe 6 Stop the nitrogen supply when the piping has cooled down. 7 Remove the high pressure switch. INFORMATION It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to remove the remaining component pipe end(s) from the refrigerant pipes by heating the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
Page 98: Humidity Sensor
Components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.7 Humidity sensor 4.7.1 Checking procedures To perform a power check of the humidity sensor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 99: Repair Procedures
Components Is the output voltage on the indoor unit Action main PCB correct? Perform a check of the indoor unit main PCB, see "4.9.1 Checking procedures" [ 103]. 5 As there are no further check procedures for this component, perform a check of the indoor unit main PCB to check if the humidity sensor needs to be replaced.
Page 100 Components a Humidity sensor PCB assembly 2 Connect the harness to the humicity sensor PCB assembly. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To remove the humidity sensor wiring harness Prerequisite: Stop the unit operation via the user interface.
Page 101: Indoor Unit Fan Motor
Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. 4.8 Indoor unit fan motor 4.8.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a mechanical check of the DC fan motor assembly Prerequisite: Stop the unit operation via the user interface.
Page 102: Repair Procedures
Components 4.8.2 Repair procedures To remove the DC fan motor assembly Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.14 Plate work" [ 144]. 1 Remove the switch box, see "4.14 Plate work" [ 144].
Page 103: Indoor Unit Main Pcb
Components a Indoor unit fan motor cover 4 Install the switch box, see "4.14 Plate work" [ 144]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.9 Indoor unit main PCB 4.9.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order.
Page 104 Components a Connector S300A Is the measured voltage on the indoor Action unit main PCB correct? Return to "4.9.1 Checking procedures" [ 103] of the indoor unit main PCB and continue with the next procedure. Continue with the next step. 3 Measure the output voltage between the pins 1‑4 of the connector S102 on the indoor unit power PCB.
Page 105 Components a HAP LED INFORMATION Make sure the correct software is available on the PCB. If NOT, update using the updater tool. Does the HAP LED blink in regular Action intervals (1 second ON/1 second OFF)? Return to "4.9.1 Checking procedures" [ 103] of the indoor unit main PCB and continue with the next procedure.
Page 106: Repair Procedures
Components Prerequisite: Turn OFF the respective circuit breaker. 1 Check that all wires are properly connected and that all connectors are fully plugged‑in. 2 Check that no connectors or wires are damaged. 3 Check that the wiring corresponds with the wiring diagram, see "7.2 ...
Page 107 Components a Indoor unit main PCB b PCB support 3 Remove the indoor unit main PCB from the indoor unit. 4 To install the indoor unit main PCB, see "4.9.2 Repair procedures" [ 106]. To install the indoor unit main PCB 1 Install the indoor unit main PCB in the correct location on the PCB supports. a Indoor unit main PCB b PCB support 2 Connect all connectors to the indoor unit main PCB.
Page 108: Indoor Unit Power Pcb
Components WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB. Is the problem solved? Action No further actions required.
Page 109 Components Is the measured voltage on the indoor Action unit power PCB correct? Continue with the next step. 3 Check the power supply to the indoor unit, see "5.1.1 Checking procedures" [ 180]. Is the power supply to the indoor unit Action correct? Correct the wiring between the power...
Page 110 Components Is the correct spare part for the indoor Action unit power PCB installed? Return to "4.10.1 Checking procedures" [ 108] of the indoor unit power PCB and continue with the next procedure. Replace the indoor unit power PCB, see "4.10.2 Repair procedures" [ 111].
Page 111: Repair Procedures
Components Blown fuse on the indoor unit power Action PCB? Replace the blown fuse, see "4.10.2 Repair procedures" [ 111]. Return to "4.9.1 Checking procedures" [ 103] of the indoor unit power PCB and continue with the next procedure. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required.
Page 112 Components a Indoor unit power PCB 3 Remove the indoor unit power PCB from the indoor unit. 4 To install the indoor unit power PCB, see "4.10.2 Repair procedures" [ 111]. To install the indoor unit power PCB 1 Install the indoor unit power PCB in the correct location in the switch box. Make sure the PCB is correctly fixed by the PCB retainers.
Page 113 Components WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB. Is the problem solved? Action No further actions required.
Page 114: Intelligent Thermal Sensor
Components a Fuse F1U Is the problem solved? Action No further actions required. Return to "4.9.1 Checking procedures" [ 103] of the indoor unit power PCB and continue with the next procedure. 4.11 Intelligent thermal sensor 4.11.1 Checking procedures To perform a power check of the intelligent thermal sensor Prerequisite: Stop the unit operation via the user interface.
Page 115: Repair Procedures
Components Is the output voltage on the indoor unit Action main PCB correct? Replace the intelligent thermal sensor wiring harness, see "4.11.2 Repair procedures" [ 115]. Perform a check of the indoor unit main PCB, see "4.9.1 Checking procedures" [ 103]. 6 As there are no further check procedures for this component, first perform a check of the indoor unit PCB to check if the intelligent thermal sensor needs to be replaced.
Page 116 Components 3 Route the wiring harness along the harness retainers on the intelligent thermal sensor assembly. 4 Click the intelligent thermal sensor assembly on the indoor unit. a Intelligent thermal sensor assembly Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 117: Main Pcb
Components 6 To install the intelligent thermal sensor wiring harness, see "4.11.2 Repair procedures" [ 115]. To install the intelligent thermal sensor wiring harness 1 Connect the wiring harness connector to the indoor unit main PCB. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 118 Components Prerequisite: Remove the required plate work, see "4.14 Plate work" [ 144]. 1 Turn ON the power of the unit. 2 Measure the voltage between the black and white wires. Result: The measured voltage MUST be 230 V AC. a Black wire b White wire Is the measured voltage on the PCB Action correct?
Page 119 Components INFORMATION Make sure the correct software is available on the PCB. If NOT, update using the updater tool. Does the HAP LED blink in regular Action intervals (1 second ON/1 second OFF)? Return to "Checking procedures" [ 117] of the main PCB and continue with the next procedure.
Page 120 Components To check the fuse of the main PCB Prerequisite: First perform all earlier main PCB checks, see "Checking procedures" [ 117]. 1 Measure the continuity of the fuse. If no continuity is measured, the fuse has blown. a Fuse F1U b Fuse F2U Blown fuse on the main PCB? Action...
Page 121 Components INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter. Is the measured rectifier voltage Action correct? Perform a check of the power modules, "Checking procedures" [ 117].
Page 122 Components 0.51~0.52 V 4 If the diode module is NOT OK, replace the main PCB, see "Repair procedures" [ 124]. To perform a power module check Prerequisite: First check the rectifier voltage of the main PCB, see "Checking procedures" [ 117]. Prerequisite: Stop the unit operation via the user interface. 1 Turn OFF the respective circuit breaker.
Page 123 Components 0.501 V 0.501 V 0.501 V DC– 0.501 V DC– DC– 0.501 V DC– DC– 0.501 V DC– Power module IPM2 for fan motor 1 Disconnect the fan motor connector from the main PCB. 2 Check the power module IPM2 in reference with the image and the table below.
Page 124 Components DC– 0.475 V DC– Are the test results OK? Action Power modules are OK. Return to "Checking procedures" [ 117] of the main PCB and continue with the next procedure. Replace the main PCB, see "Repair procedures" [ 124]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required.
Page 125 Components 5 Remove the ferrite core (for ground wiring) from the switch box (unplug fixation plug). 6 Disconnect all other connectors from the main PCB. 7 Remove the screws from the main PCB. 8 Remove the main PCB from the unit. 9 To install the main PCB, see "Repair procedures" [...
Page 126: Class 42+50 Units
Components Is the problem solved? Action Return to "Checking procedures" [ 117] of the PCB and continue with the next procedure. 4.12.2 Class 42+50 units Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a power check of the main PCB Prerequisite: Stop the unit operation via the user interface.
Page 127 Components To check the HAP LED of the main PCB Prerequisite: First check the power supply to the main PCB, see "Checking procedures" [ 126]. 1 Locate the HAP LED on the main PCB. a HAP LED INFORMATION Make sure the correct software is available on the PCB. If NOT, update using the updater tool.
Page 128 Components To check the wiring of the main PCB Prerequisite: First perform all earlier main PCB checks, see "Checking procedures" [ 126]. Prerequisite: Stop the unit operation via the user interface. 1 Turn OFF the respective circuit breaker. 2 Check that all wires are properly connected and that all connectors are fully plugged‑in.
Page 129 Components To check the rectifier voltage of the main PCB Prerequisite: First perform all earlier main PCB checks, see "Checking procedures" [ 126]. 1 Turn ON the power of the unit. 2 Measure the voltage on the rectifier voltage check terminals (+ and –) on the main PCB.
Page 130 Components a V DC out (+) b V AC in c V AC in d V DC out (–) INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter. 0.51~0.52 V 0.51~0.52 V 0.51~0.52 V...
Page 131 Components d DC+ e DC– INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter. 0.501 V 0.501 V 0.501 V DC– 0.501 V DC– DC– 0.501 V DC– DC–...
Page 132 Components Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.14 Plate work" [ 144]. 1 Disconnect the power supply wires from the main power supply terminal X1M. 2 Remove the ferrite core (for power supply wires) from the switch box (unplug fixation plug).
Page 133 Components a Power supply wires from X1M b Ferrite core (power supply wires) c Tie strap (power supply wires) d Screw (ground wiring) e Ferrite core (ground wiring) f Compressor connector g Tie strap (compressor harness) h Ferrite core (compressor harness) i Screw j Main PCB 3 Install and tighten the screws.
Page 134: Outdoor Unit Fan Motor
Components 4.13 Outdoor unit fan motor 4.13.1 Class 20~35 units Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a mechanical check of the propeller fan blade assembly Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 135 Components INFORMATION Check the DC fan motor power supply (voltage) circuit on the PCB. 2 Turn ON the power of the unit. 3 Activate Cooling or Heating operation via the user interface. 4 Check the functioning of the outdoor unit fan. Outdoor unit fan …...
Page 136 Components Are the measured resistance values Action correct? Perform a check of the main PCB, see "Checking procedures" [ 117]. Replace the DC fan motor, see "Repair procedures" [ 136]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required.
Page 137 Components DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. 2 Disconnect the DC fan motor connector from the main PCB. a DC fan motor connector b DC fan motor harness c Switch box...
Page 138: Class 42+50 Units
Components 4 Route the DC fan motor harness upwards and attach the DC fan motor harness to the switch box. 5 Connect the DC fan motor connector to the connector on the main PCB. 6 Install the propeller fan blade assembly, see "Repair procedures" [ 136].
Page 139 Components 2 Check the state of the propeller fan blade assembly for damage, deformations and cracks. Is the propeller fan blade assembly Action damaged? Replace the propeller fan blade assembly, see "Repair procedures" [ 141]. Perform a mechanical check of the DC fan motor assembly, see "Checking procedures" [...
Page 140 Components 5 Confirm via the service monitoring tool that the DC fan motor assembly receives an ON signal. 6 Turn OFF the unit via the user interface. 7 Turn OFF the respective circuit breaker. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 141 Components 13 Connect the DC fan motor connector to the PCB. Remove the plastic insert from the connector for easier measurement. CAUTION Ensure that the system CANNOT start the fan. Disable all modes (heating, cooling, …) on the unit. The unit MUST be kept powered. 14 Manually (slowly) rotate the fan blade propeller 1 turn and measure the voltage on the DC fan motor connector pins 1-4.
Page 142 Components INFORMATION Use a pulley remover if the propeller cannot be removed manually. 4 To install the propeller fan blade assembly, see "Repair procedures" [ 141]. To remove the DC fan motor assembly 1 Remove the propeller fan blade assembly from the DC fan motor assembly, "Repair procedures" [ 141].
Page 143 Components a Tie strap b DC fan motor harness c Switch box d Fan motor bracket e Screw f DC man motor assy 3 Route the DC fan motor harness through the harness retainers (at the back of the fan motor bracket) and bend the harness retainers to attach the DC fan motor harness.
Page 144: Plate Work
Components Is the problem solved? Action Return to "Checking procedures" [ 138] of the outdoor unit fan motor and continue with the next procedure. 4.14 Plate work 4.14.1 Outdoor unit To remove the refrigerant connection cover DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING 1×...
Page 145 Components DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. 2 Loosen and remove the screws that fix the top plate. a Screw b Top plate 3 Remove the top plate.
Page 146 Components a Insulation b Main PCB 2 Disconnect all connectors from the main PCB. 3 Disconnect the electrical power supply wiring from the wire terminals. a Electrical power supply wiring b Wire terminals c Screws d Wire clamp e Screws f Right side plate assembly 4 Remove the screws that fix the wire clamp.
Page 147 Components 5 Remove the wire clamp. 6 Remove the screws that fix the right side plate assembly. 7 Cut the cable tie. a Cable tie b Switch box 8 Lift and remove the switch box from the outdoor unit. 9 To install the switch box, see "4.14 Plate work" [ 144].
Page 148 Components a Electrical power supply wiring b Wire terminals c Screws d Wire clamp e Screws f Right side plate assembly 3 Connect the electrical power supply wiring to the wire terminals. 4 Install the wire clamp and fix it using the screws. 5 Connect all connectors to the main PCB.
Page 149: Indoor Unit
Components a Cable tie b Switch box 7 Install the insulation on the upper side of the switch box. a Insulation b Main PCB 4.14.2 Indoor unit To open the front panel 1 Stop operation by Result: The front panel closes automatically. 2 Open the front panel using the wireless remote control.
Page 150 Components a Lock (1 on each side) b Backside of the front panel c Fixing tab d Support INFORMATION If you CANNOT find the wireless remote control or you use another optional controller. Pull the front panel carefully up by hand as shown in the following figure. To remove the front panel INFORMATION Remove the front panel only in case it MUST be replaced.
Page 151 Components a Arm b Shaft slot c Shaft 5 Remove the front panel. 6 To re-install the front panel, perform the steps in the opposite order. To remove the front grille CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system.
Page 152 Components a Hook Prerequisite: If working space is limited. 7 Slide the flat screwdriver in the direction of triangle on the rib into the half- moon shaped dent on the grille. a Triangle symbol 8 Slightly press down the front grille and insert the screwdriver in slot next to the hooks.
Page 153 Components NOTICE When closing the service cover, make sure that the tightening torque does NOT exceed 1.4 (±0.2) N•m. TO REMOVE THE ELECTRICAL WIRING BOX COVER Prerequisite: Remove the front grille. 1 Remove 1 screw from the electrical wiring box. 2 Open the electrical wiring box cover by pulling it to the front. 3 Remove the electrical wiring box cover from the 2 rear hooks.
Page 154 Components a Power supply terminal X1M b Power supply wiring bracket c Screw (ground wire) d Indoor unit main PCB e Switch box screw f Switch box 5 Disconnect the connectors of the indoor unit fan motor and the swing flap motors from the indoor unit PCB.
Page 155 Components 4 Install the heat exchanger thermistor in its holder. 5 Attach the wiring harnesses to the switch box as needed. 6 Connect the grounding wire to the heat exchanger using the screw. 7 Connect the power supply wiring to the power supply terminal X1M. 8 Install the power supply wiring bracket.
Page 156: Reactor
Components 4.15 Reactor 4.15.1 Checking procedures To perform an electrical check of the reactor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.14 Plate work" [ 144]. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 157 Components a L803 b L804 c Measuring point d Measuring point Is the resistance measurement correct? Action Proceed with the next step. Replace the reactor, see "4.15.2 Repair procedures" [ 159]. 4 Measure the inductance of the reactor using an LCR meter. Result: The inductance MUST be 80~100 µH.
Page 158 Components a Reactor L803 b Reactor L804 2 Remove the main PCB, see "Repair procedures" [ 131]. The reactor measuring points are ONLY reachable on the back side of the main PCB. 3 Measure the resistance of the reactor using a low ohm multi meter. Result: The resistance MUST be as follows: Measuring points Resistance...
Page 159: Repair Procedures
Components a L803 b L804 c Measuring point d Measuring point Is the inductance measurement Action correct? Return to the troubleshooting of the specific error and continue with the next step. Replace the reactor, see "4.15.2 Repair procedures" [ 159]. 4.15.2 Repair procedures As the reactors are part of the main PCB, replace the complete main PCB.
Page 160 Components 1 Disconnect the connector from the streamer unit. a Streamer unit connector b Streamer unit 2 Click the streamer unit out of the indoor unit. 3 To install the streamer unit, see "4.16.2 Repair procedures" [ 159]. To install the streamer unit 1 Install the streamer unit in the correct location on the indoor unit.
Page 161: Swing Flap Motor
Components a Streamer unit connector b Streamer unit 2 Connect the streamer unit harness to the streamer unit. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.17 Swing flap motor 4.17.1 Main swing flap motor Checking procedures...
Page 162 Components Pins Measured resistance (Ω) 353.4~406.6 706.8~813.2 Swing flap motor resistance Action measurements are correct? Return to the troubleshooting of the specific error and continue with the next procedure. Continue with the next step. 3 Remove the swing flap motor, see "Repair procedures" [ 166].
Page 163 Components Repair procedures INFORMATION To replace the motor, the complete gearcase assembly MUST be replaced. To remove the swing flap motor gearcase assembly Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.14 Plate work" [ 144].
Page 164: Secondary Swing Flap Motor
Components 3 Install the main swing flap in the indoor unit (by clicking it on). Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To remove the swing flap motor wiring harness Prerequisite: Stop the unit operation via the user interface.
Page 165 Components 2 Measure the resistance between the following pins of the motor connector. Result: The measurements MUST be as shown in the table below. Pins Measured resistance (Ω) 10-6 279~321 10-7 10-8 10-9 558~642 Swing flap motor resistance Action measurements are correct? Return to the troubleshooting of the specific error and continue with the next procedure.
Page 166 Components Repair procedures INFORMATION To replace the motor, the complete gearcase assembly MUST be replaced. This includes the secondary swing flap motor, swing raster motor and gears. As the secondary swing flap motor wiring harness is the same harness as the main swing flap motor wiring harness, see "Repair procedures" ...
Page 167 Components a Screw b Swing flap motor gearcase assembly 8 Disconnect the swing raster motor rod from the swing raster shaft. 9 Remove the swing flap motor gear case assembly from the indoor unit. 10 Disconnect the wiring harness from the secondary swing flap motor and from the swing raster motor.
Page 168: Swing Raster Motor
Components 10 Install the main swing flap in the indoor unit (by clicking it on). 11 Install the switch box, see "4.14 Plate work" [ 144]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 169: Repair Procedures
Components Pins Measured resistance (Ω) 279~321 558~642 Swing raster motor resistance Action measurements are correct? Replace the swing raster motor wiring harness, see "4.18.2 Repair procedures" [ 169]. Replace the swing raster motor, see "4.18.2 Repair procedures" [ 169]. 4.18.2 Repair procedures INFORMATION To replace the motor, the complete gearcase assembly MUST be replaced. As the swing raster motor is part of the secondary swing flap motor gearcase assembly, see "4.17.2 ...
Page 170 Components 1 Locate the thermistor and remove the insulation if needed. Check that the thermistor is correctly installed and that there is thermal contact between the thermistor and the piping or ambient (for air thermistor). Is the thermistor correctly installed Action (thermal contact between the thermistor and the piping)?
Page 171 Components 4 Determine the thermistor resistance that matches the measured temperature. Thermistor – Table A T °C kΩ T °C kΩ T °C kΩ T °C kΩ –20 197.81 39.96 10.63 3.44 –19 186.53 38.08 10.21 3.32 –18 175.97 36.30 9.81 3.21 –17...
Page 172 Components ▪ E.g. R1T thermistor: ▪ Measured temperature with contact thermometer: 23.1°C, ▪ Resistance value determined through temperature (using the thermistor table A): Resistance at 23°C: 21.85 kΩ, Resistance at 24°C: 20.90 kΩ, ▪ Disconnect connector and measure resistance between S90 pin 1‑2: Measured resistance: 21.80 kΩ, ▪...
Page 173: Repair Procedures
Components Does the measured resistance of the Action thermistor match with the temperature determined resistance? Correct the wiring between the thermistor connector on the PCB and the intermediate connector, see "7.2 Wiring diagram" [ 199]. Replace the specific thermistor, see "4.19.2 Repair procedures" [ 173].
Page 174 Components a Tie strap b Insulation c Thermistor wire d Clip e Thermistor f Thermistor holder 3 Cut all tie straps that fix the thermistor harness. 4 Disconnect the thermistor connector from the appropriate PCB and remove the thermistor. INFORMATION Some of the thermistors are wired to the same connector.
Page 175 Components a Clip b Thermistor c Thermistor holder d Insulation e Thermistor wire f Tie strap 2 Route the thermistor harness towards the appropriate PCB. 3 Connect the thermistor connector to the appropriate PCB. INFORMATION Some of the thermistors are wired to the same connector. See connector and pin information of the thermistors at the start of the electrical check procedure and "7.2 Wiring diagram" [...
Page 176: Wifi Control Pcb
Components WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB. 5 Fix the thermistor harness using new tie straps 6 Install the insulation around the thermistor.
Page 177: Repair Procedures
Components 4 Measure the output voltage between between the pins 4‑5 on the connector S801 on the indoor unit main PCB. Result: The measured voltage MUST be 10~16 V DC. Is the output voltage on the indoor unit Action main PCB correct? Replace the wifi control PCB wiring harness, see "4.20.2 Repair...
Page 178 Components a Wifi control PCB assembly 2 Connect the harness to the wifi control PCB assembly. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To remove the wifi control PCB wiring harness Prerequisite: Stop the unit operation via the user interface.
Page 179 Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. RXJ20~50A + FTXJ-A(W)(S)(B) Service manual Split Emura 3 R32 ESIE22-04B – 2022.08...
Page 180: Third Party Components
Third party components 5 Third party components 5.1 Electrical circuit 5.1.1 Checking procedures To check the power supply of the unit Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.14 Plate work" [ 144].
Page 181: Repair Procedures
Third party components Is the measured voltage (power supply) Action correct? Continue with the next step. 6 Check the power supply to the unit, see "5.1.1 Checking procedures" [ 180]. Does the unit receive power? Action Correct the wiring from the main power supply terminal to the indoor unit power supply terminal, see "5.1.2 Repair...
Page 182: Refrigerant Circuit
Third party components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. To correct the wiring from the main power supply terminal to the indoor unit power supply terminal Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 183 Third party components To check if the stop valves are open Prerequisite: Remove the required plate work, see "4.14 Plate work" [ 144]. 1 Remove the caps. a Liquid stop valve b Gas stop valve 2 Check if the stop valves are completely open. The refrigerant circuit stop valves are Action open?
Page 184 Third party components 7 On the refrigerant liquid piping (between the indoor unit heat exchanger and the outdoor unit heat exchanger (coil)), using a contact thermometer, measure the temperature before and after every restricting device. If a big temperature difference is measured (>2.5~4K), an internal pipe obstruction may be present at this location.
Page 185 Third party components Cooling High pressure drooping control Operating frequency comes to the lowest level. High pressure gradually rises with increasing operating frequency. High Subcooling degree becomes pressure higher. (The temperature of liquid connection piping becomes lower.) (Low pressure is maintained at a certain level.) pressure Low pressure rises with lowering...
Page 186 Third party components Cooling The opening degree of the electronic Fan control, i.e., expansion valve comes larger. actually hunting to Electronic expansion valve maintain high pressure fully opens. on the cooling control with low outdoor air. Operating frequency comes to the lowest level. High pressure High pressure decreases...
Page 187: Repair Procedures
Third party components 3 Measure the pressure of the refrigerant. The measured pressure converted into saturated temperature MUST be in line with the expected pressure / saturated temperature at current ambient temperature. 4 If the measured pressure is significantly higher (>5K), non‑condensables gasses are most likely present in the refrigerant.
Page 188 Third party components a Liquid stop valve b Gas stop valve 2 Completely open the stop valves by screwing the stop valve screw counterclockwise. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 189 Third party components a Vacuum pump b Connect flexible hose to service port c To recovery pump L Low pressure H High pressure V Vacuum R Refrigerant 3 To add refrigerant, see "5.2.2 Repair procedures" [ 187]. Is the problem solved? Action No further actions required.
Page 190 Third party components ▪ Make sure to use the appropriate equipment and tools according to the refrigerant and unit type. ▪ R32 can be charged in gas phase. ▪ Make sure to use a digital scale (no charging cylinder). ▪ Execute correct vacuum drying procedure after repair: When using an electronic vacuum gauge with an absolute pressure readout, a pressure of minimal 2000 ...
Page 191 Third party components ▪ Pipe expansion / flare making: Remove any burrs on the cut surface using the correct tool such as reamer or scraper (note that excessive deburring can thin the pipe walls and cause cracking of the pipe). Make sure the flare has the correct size (use a flare gauge).
Page 192: External Factors
Third party components 5.3 External factors 5.3.1 Checking procedures To check the outdoor temperature 1 The temperature ranges for the different operation modes of the unit can be found in the databook on Business Portal. INFORMATION If the outdoor temperature is outside the range of operation, the unit may NOT operate or may NOT deliver the required capacity.
Page 193: Maintenance
General maintenance/inspection checklist. Next to the maintenance instructions in this chapter, a general maintenance/inspection checklist is also available on the Daikin Business Portal (authentication required). The general maintenance/inspection checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during maintenance.
Page 194: To Clean The Indoor Unit Heat Exchanger In Extreme Condition
Maintenance 6.3 To clean the indoor unit heat exchanger in extreme condition When cleaning the indoor unit heat exchanger (contaminated by cooking oil, …), make sure to: ▪ Use proper field supply cleaning agent which is suitable for cleaning heat exchangers and drain pans.
Page 195: To Clean The Front Panel
Maintenance 6.5 To clean the front panel 1 Clean the front panel with a soft cloth. If it is difficult to remove stains, use water or a neutral detergent. 6.6 To clean the air filters 1 Push the tab at the centre of each air filter, then pull it down. 2 Pull out the air filters.
Page 196: To Clean The Titanium Apatite Deodorising Filter And The Silver Particle Filter (Ag-Ion Filter)
Maintenance INFORMATION ▪ If the dust does NOT come off easily, wash the air filters with a neutral detergent diluted in lukewarm water. Dry the air filters in the shade. ▪ Be sure to remove the titanium apatite deodorising and silver particle filters. ▪...
Page 197: To Replace The Titanium Apatite Deodorising Filter And The Silver Particle Filter (Ag-Ion Filter)
Maintenance 6.8 To replace the titanium apatite deodorising filter and the silver particle filter (Ag-ion filter) INFORMATION Replace the filter every 3 years. To order titanium apatite deodorising filter or silver particle filters, contact your dealer. Item Part number Titanium deodorising filter KAF970A46 Silver particle filter KAF057A41...
Page 198: Technical Data
Technical data 7 Technical data 7.1 Detailed information setting mode 7.1.1 Detailed information setting mode: Indoor unit See the installer reference guide on business portal for more information. 7.1.2 Detailed information setting mode: Outdoor unit See the installer reference guide on business portal for more information. 7.1.3 Detailed information setting mode: Remote controller See the installer reference guide on business portal for more information.
Page 199: Wiring Diagram
Technical data 7.2 Wiring diagram 7.2.1 Wiring diagram: Indoor unit 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 "*"...
Page 200 Technical data Symbol Meaning Heater FU*, F*U, (for characteristics, refer to Fuse PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L Pilot lamp, light emitting diode Light emitting diode (service monitor green) HIGH VOLTAGE High voltage Intelligent eye sensor IPM* Intelligent power module K*R, KCR, KFR, KHuR, K*M...
Page 201 Technical data Symbol Meaning 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) Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S Surge arrester SR*, WLU Signal receiver Selector switch SHEET METAL...
Page 202 Technical data Wiring diagram INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. Streamer unit Streamer part Indoor S400 S500...
Page 203: Wiring Diagram: Outdoor Unit
Technical data 7.2.2 Wiring diagram: Outdoor unit 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...
Page 204 Technical data Symbol Meaning FU*, F*U, (for characteristics, refer to Fuse PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L Pilot lamp, light emitting diode Light emitting diode (service monitor green) HIGH VOLTAGE High voltage Intelligent eye sensor IPM* Intelligent power module K*R, KCR, KFR, KHuR, K*M...
Page 205 Technical data Symbol Meaning 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) Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S Surge arrester SR*, WLU Signal receiver Selector switch SHEET METAL Terminal strip fixed plate...
Page 206 Technical data RXJ20~35A INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. Wiring diagram Indoor IPM1 MRM10 MRM20 W V U...
Page 207: Piping Diagram
Technical data 7.3 Piping diagram 7.3.1 Piping diagram: Indoor unit FTXJ20~35A INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book.
Page 208 Technical data FTXJ42+50A INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. ·6.4· CuT ·12.7· CuT a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø9.5 mm flare connection) c Crossflow fan...
Page 209: Piping Diagram: Outdoor Unit
Technical data 7.3.2 Piping diagram: Outdoor unit RXJ20~35A INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. ·7.0·...
Page 210 Technical data RXJ42+50A INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. ·7.0· CuT ·7.0· CuT ·4.0·...
Page 211: Component Overview
Technical data 7.4 Component overview 7.4.1 Component overview: Outdoor unit RXJ20~35A a Air thermistor R1T i Main PCB A1P b Heat exchanger j Power supply terminal X1M c Heat exchanger thermistor R2T k Expansion valve Y1E d Muffler with filter l Muffler e Stop valve with service port (gas) m Accumulator...
Page 212 Technical data RXJ42+50A a Air thermistor R1T j Main PCB A1P b Heat exchanger k Power supply terminal X1M c Heat exchanger thermistor R2T l Muffler d Liquid receiver m Expansion valve Y1E e Stop valve with service port (gas) n Muffler with filter f Stop valve (liquid) o Accumulator...
Page 213: Component Overview: Indoor Unit
Technical data 7.4.2 Component overview: Indoor unit a Heat exchanger j Display PCB A3P b Heat exchanger thermistor R1T k Intelligent thermal sensor A6P c Connector X1A for front panel motor l Main swing flap motor M1S d Streamer unit m Indoor unit fan motor M1F e Wifi control PCB A7P n Swing raster motor M3S...
Page 214: Field Information Report
Technical data 7.5 Field information report See next page. RXJ20~50A + FTXJ-A(W)(S)(B) Service manual Split Emura 3 R32 ESIE22-04B – 2022.08...
Page 215 In case a problem occurred on the unit which could not be resolved by using the content of this service manual or in case you have a problem which could be resolved but of which the manufacturer should be notified, we advise you to contact your distributor.
Page 216 Application information Application (house, apartment, office,…): New project or reimbursement: Heat emitters (radiators / under floor heating / fan coils /…): Hydraulic layout (simple schematic): Unit / Installation information Model name: Serial number: Installation / commissioning date: Software version hydro PCB A1P Software version hydro PCB A5P Software version user interface: Software version outdoor PCB:...
Page 217: Service Tools
Technical data 7.6 Service tools 1 For an overview of the available service tools, check the Daikin Business Portal (authentication required). 2 Go to the tab After-sales support on the left navigation pane and select Technical support. 3 Click the button Service tools. An overview of the available service tools for the different products is shown.
Page 218: Field Settings
Technical data 7.7 Field settings 7.7.1 Field settings: Indoor unit To retrieve the field settings Via the wireless remote controller ARC488A1 a LCD display b Temperature up/down and menu navigation up/down buttons c ON/OFF button d Powerful operation button e Menu navigation left/right buttons f Confirm button g Main menu button h Outdoor unit silent operation...
Page 219 Technical data 6 Navigate to the self‑diagnosis menu using Self‑diagnosis menu 7 Keep pressed for at least 5 seconds. Result: Self‑diagnosis menu is entered. 8 Enter password 5902 using 9 Press to confirm password. 10 Navigate to the Service menu using Service menu 11 Press to confirm.
Page 220 Technical data Overview of field settings for indoor units The overview lists all possible settings for the indoor units. Bold content is default setting. Mode Description function Setting Description selection Suspend (Reduce the standby power consumption) Suspend OFF Suspend ON Preheating (pre‑heating of compressor by motor) Cooling room temperature correction Low 2 = −2°C...
Page 221: Field Settings: Outdoor Unit
Technical data 7.7.2 Field settings: Outdoor unit To reduce maximum sound levels If the sound level CANNOT meet the local regulation (e.g. Netherlands), the maximum sound level can be reduced by cutting J5 jumper on the main PCB of the outdoor unit.
Page 224 ESIE22-04B 2022.08 Verantwortung für Energie und Umwelt...

Daikin Emura RXJ20A5V1B Service Manual

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