Daikin Stylish Series Service Manual
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Daikin Stylish Series Service Manual

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CTXA15A(W)(S)(T)
CTXA15B(B)(S)(T)
FTXA20A(W)(S)(T)
FTXA20B(B)(S)(T)
FTXA25A(W)(S)(T)
FTXA25B(B)(S)(T)
FTXA35A(W)(S)(T)
FTXA35B(B)(S)(T)
FTXA42A(W)(S)(T)
FTXA42B(B)(S)(T)
Service manual
Split Stylish R32
FTXA50A(W)(S)(T)
FTXA50B(B)(S)(T)
RXA42A
RXA50A
RXA20A
RXA25A
RXA35A
RXA42B
RXA50B

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Summary of Contents for Daikin Stylish Series

  • Page 1 Service manual Split Stylish R32 CTXA15A(W)(S)(T) FTXA50A(W)(S)(T) RXA50B CTXA15B(B)(S)(T) FTXA50B(B)(S)(T) FTXA20A(W)(S)(T) RXA42A FTXA20B(B)(S)(T) RXA50A FTXA25A(W)(S)(T) FTXA25B(B)(S)(T) RXA20A FTXA35A(W)(S)(T) RXA25A FTXA35B(B)(S)(T) RXA35A FTXA42A(W)(S)(T) FTXA42B(B)(S)(T) RXA42B...
  • 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 ESIE18-03C See below February 2020 The following updates have been applied to the Service Manual: • Indoor unit models CTXA15B and FTXA20~50B added. • Outdoor unit fan motor: Checking procedures updated. • Inverter PCB – Checking procedures: To perform an electrical check of the inverter PCB updated. (C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A + Service manual RXA20~35A + RXA42+50B...

  • Page 4: Table Of Contents

    Table of contents Table of contents 1 Troubleshooting To display the error code on the user interface ......................To reset the error code via remote controller ....................... To reset the error code via outdoor unit ........................To perform a test run..............................1.4.1 To perform a test run using the user interface .....................
  • Page 5 Table of contents Front panel motor................................61 2.4.1 Checking procedures ............................61 2.4.2 Repair procedures ............................62 High pressure switch............................... 63 2.5.1 Checking procedures ............................63 2.5.2 Repair procedures ............................64 Humidity sensor ................................66 2.6.1 Checking procedures ............................66 2.6.2 Repair procedures ............................
  • Page 6 Table of contents Wiring diagram................................145 5.2.1 Wiring diagram: Indoor unit........................... 145 5.2.2 Wiring diagram: Outdoor unit........................147 Piping diagram ................................151 5.3.1 Piping diagram: Indoor unit..........................151 5.3.2 Piping diagram: Outdoor unit......................... 152 Component overview..............................155 5.4.1 Component overview: Indoor unit......................... 155 5.4.2 Component overview: Outdoor unit......................

  • Page 7: Troubleshooting

    Troubleshooting 1 Troubleshooting 1.1 To display the error code on the user interface 1 Hold for about 5 seconds. Result: blinks in the temperature display section. 2 Press repeatedly until a continuous beep is heard. Result: The code is now displayed on the display. INFORMATION ▪...

  • Page 8: To Perform A Test Run Using The User Interface

    Troubleshooting 1.4.1 To perform a test run using the user interface 1 Press to switch the system on. 2 Press simultaneously. 3 Press , select and press Result: Test run operation will stop automatically after about 30 minutes. 4 To stop operation sooner, press 1.5 Error based troubleshooting 1.5.1 A1-00 –...

  • Page 9: A5-00 - Freeze-Up Protection / Heating Peak Cut Control

    Troubleshooting 1.5.2 A5-00 – Freeze-up protection / heating peak cut control Trigger Effect Reset During cooling operation, Unit will stop operating. Automatic reset when indoor heat exchanger temperature is within temperature is below 0°C range. (freeze‑up protection control). During heating operation, indoor heat exchanger temperature is above 65°C (heating peak‑cut...

  • Page 10: Streamer Unit Abnormality

    Troubleshooting 1 Perform a check of the indoor unit PCB. See "2.8 Indoor unit PCB" [  71]. Possible cause: Faulty indoor unit PCB. 2 Perform a check of the indoor unit fan motor. See "2.7  Indoor unit fan motor" [  68]. Possible cause: Faulty indoor unit fan motor. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.

  • Page 11: C9-00 - Room Thermistor Abnormality

    Troubleshooting 1.5.6 C9-00 – Room thermistor abnormality Trigger Effect Reset Resistance value is out of Unit will stop operating. Automatic reset when range. Temperature resistance is within range. measured <–43.6°C or >90°C. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the room thermistor.

  • Page 12: E1-00 - Outdoor Unit: Pcb Defect

    Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the intelligent thermal sensor. See "2.9 Intelligent thermal sensor" [  78]. Possible cause: Faulty intelligent thermal sensor. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.

  • Page 13: E3-00 - Outdoor Unit: Actuation Of High Pressure Switch

    Troubleshooting 1.5.10 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 14: E5-00 - Outdoor Unit: Overheat Of Inverter Compressor Motor

    Troubleshooting 1.5.11 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 15: E6-00 - Outdoor Unit: Compressor Startup Defect

    Troubleshooting 1.5.12 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 16: E7-00 - Outdoor Unit: Malfunction Of Outdoor Unit Fan Motor

    Troubleshooting 1.5.13 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 17: Cooling/Heating Switch Abnormality

    Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (imbalance >10%), ▪ Power drop, ▪ Short circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 1.5.15 EA-00 – Cooling/Heating switch abnormality Trigger Effect Reset...

  • Page 18: F3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Temperature

    Troubleshooting 1.5.16 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. temperature drops temperature. normal level. If the error re-occurs too Manual reset via user soon: unit will stop interface.

  • Page 19: F8-00 - System Shutdown Due To Compressor Internal Temperature Abnormality

    Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Clean the outdoor heat exchanger. See "4 Maintenance" [  142]. Possible cause: Dirty outdoor heat exchanger. 2 Check that all stop valves of the refrigerant circuit are open. See "3.2 Refrigerant circuit" [  133].

  • Page 20: H0-00 - Outdoor Unit: Voltage/Current Sensor Problem

    Troubleshooting Possible cause: ▪ Stop valve is closed, ▪ Clogged refrigerant circuit, ▪ Refrigerant circuit NOT charged correctly, ▪ Humidity in the refrigerant circuit, ▪ Non-condensables in the refrigerant circuit, ▪ Leaking refrigerant circuit. 2 Perform check discharge pipe thermistor. "2.18 Thermistors" [  119].

  • Page 21: H6-00 - Outdoor Unit: Malfunction Of Position Detection Sensor

    Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the high pressure switch. See "2.5  High pressure switch" [  63]. Possible cause: Faulty high pressure switch. 2 Perform a check of the main PCB. See "2.11 Main PCB" [  81].

  • Page 22: H8-00 - Outdoor Unit: Malfunction Of Compressor Input System

    Troubleshooting 6 Check if the refrigerant circuit is correctly charged. See "3.2  Refrigerant circuit" [  133]. Possible cause: Refrigerant overcharge or shortage. 7 Check for the presence of non‑condensables and/or humidity in the refrigerant circuit. See "3.2 Refrigerant circuit" [  133]. Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. 8 Check if the power supply is conform with the regulations.

  • Page 23: H9-00 - Outdoor Unit: Malfunction Of Outdoor Air Thermistor

    Troubleshooting 1.5.23 H9-00 – Outdoor unit: Malfunction of outdoor air thermistor Trigger Effect Reset Outdoor air 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 a check of the outdoor air thermistor.

  • Page 24: L3-00 - Outdoor Unit: Electrical Box Temperature Rise Problem

    Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform check heat exchanger thermistor. "2.18 Thermistors" [  119]. Possible cause: Faulty heat exchanger thermistor. 2 Perform a check of the main PCB. See "2.11 Main PCB" [  81].

  • Page 25: L4-00 - Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise

    Troubleshooting 1.5.27 L4-00 – Outdoor unit: Malfunction of inverter radiating fin temperature rise Trigger Effect Reset Radiating fin thermistor Unit will stop operating. Manual reset via user measures a too high interface. temperature. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the outdoor unit fan motor.

  • Page 26: P4-00 - Outdoor Unit: Malfunction Of Radiating Fin Temperature Sensor

    Troubleshooting Possible cause: Closed stop valve in the refrigerant circuit. 2 Check if the refrigerant circuit is clogged. See "3.2 Refrigerant circuit" [  133]. Possible cause: Clogged refrigerant circuit. 3 Check if the refrigerant circuit is correctly charged. See "3.2  Refrigerant circuit" [  133].

  • Page 27: U0-00 - Outdoor Unit: Shortage Of Refrigerant

    Troubleshooting 1.5.30 U0-00 – Outdoor unit: Shortage of refrigerant Trigger Effect Reset Refrigerant shortage Unit will stop operating. Automatic reset. detected. Power reset via outdoor unit. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform check refrigerant...

  • Page 28: U4-00 - Indoor/Outdoor Unit Communication Problem

    Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check if the power supply is conform with the regulations. See "3.1 Electrical circuit" [  131]. Possible cause: ▪ Faulty or disturbance of the power supply (imbalance >10%), ▪...

  • Page 29: U5-00 - Transmission Malfunction Between Indoor Unit And Remote Controller

    Troubleshooting 2 Perform a check of the power supply, connections, wiring,… between the outdoor unit and the indoor unit. See "3.1 Electrical circuit" [  131]. Possible cause: Faulty wiring between the outdoor unit and the indoor unit. 3 Perform a check of the main PCB. See "2.11 Main PCB" [  81].
  • Page 30 Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check for improper combination of the indoor unit and the outdoor unit. See the combination table in the Databook for more information. 2 Perform a check of the power supply, connections, wiring,…...

  • Page 31: Symptom Based Troubleshooting

    Troubleshooting 1.6 Symptom based troubleshooting 1.6.1 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 32: 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 "1.5 Error based may be an error code, activating the troubleshooting" [...

  • Page 33: 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 34: Abnormal High Pressure

    Troubleshooting 1.6.5 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 35: Abnormal Low Pressure

    Troubleshooting Check item Detail Is the refrigerant overcharged? Conduct refrigerant collection and vacuum drying, and then add proper amount refrigerant. 1.6.6 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 36: Indoor Fan Starts Operating But The Compressor Does Not Operate

    Troubleshooting Check item Detail Is the check valve clogged? after check valve. If YES, the check valve is caught. Is the refrigerant gas short? Conduct refrigerant collection and vacuum drying, and then add proper amount refrigerant. 1.6.7 Indoor fan starts operating but the compressor does not operate Check Detail Check the power supply.

  • Page 37: Operation Starts And The Unit Stops Immediately

    Troubleshooting 1.6.8 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 38: 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 39: Components

    Components 2 Components 2.1 4-way valve 2.1.1 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. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [...
  • Page 40 Components 6 With the 4‑way valve connector connected to the PCB, measure the voltage on the 4‑way valve connection of the PCB. Result: The measured voltage MUST be 12 V DC. 7 De-activate Heating and activate Cooling operation via the user interface. 8 Measure the voltage on the 4‑way valve connection on the PCB.
  • Page 41 Components INFORMATION It is recommended to connect the service monitoring tool to the unit and verify the operation mode of the 4-way valve. 3 Check with a contact thermometer (or by touching) if the flow through the 4- way valve corresponds with the flow shown in the flow diagram. (See "5.3 Piping diagram" [  151]).

  • Page 42: Repair Procedures

    Components Is the flow correct? Action 4‑way valve is OK. Return to the troubleshooting of the specific error and continue with the next procedure. Perform the next step of this procedure. 9 Connect a manifold to one of the service ports of the refrigerant circuit and check the pressure (suction, discharge).
  • Page 43 Components 2 Cut the 4‑way valve pipes using a pipe cutter. INFORMATION The cutting locations of the 4‑way valve pipes can differ due to the pipe cutter needing sufficient space to go around the pipes. It is up to the technician to define the best cutting locations.
  • Page 44 Components a 4‑way valve pipe b 4‑way valve c Putty d Insulation 5 Install the putty (if available) and the insulation (if available) in their original location. 6 Install the 4‑way valve coil on the 4‑way valve body, see "2.1.2  Repair procedures" [  42].

  • Page 45: Compressor

    Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. 2.2 Compressor 2.2.1 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.
  • Page 46 Components a Damper INFORMATION The compressor dampers may look different. Compressor dampers and piping are in Action a good condition? Perform an electrical check of the compressor, see "2.2.1 Checking procedures" [  45]. Replace the compressor, see "2.2.2 Repair procedures" [  50]. To perform an electrical check of the compressor 1 First perform a mechanical check of the compressor, see "2.2.1 ...
  • Page 47 Components 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. a Faston connector 4 Measure the resistance between the compressor motor windings U-V, V-W and U-W.
  • Page 48 Components Compressor motor winding Action measurements are correct? Replace the compressor, see "2.2.2 Repair procedures" [  50]. 5 Re-connect the Faston connectors and install the cover of the compressor wire terminals. 6 Install the compressor insulation. 7 Turn ON the power using the respective circuit breaker. 8 Start the unit operation via the user interface.
  • Page 49 Components 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. a Faston connector 4 Set the Megger voltage to 500 V DC or 1000 V DC.

  • Page 50: Repair Procedures

    Components Compressor insulation measurements Action are correct? Replace the compressor, see "2.2.2 Repair procedures" [  50]. 2.2.2 Repair procedures To remove 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 "2.13 Plate work" [  99].
  • Page 51 Components a Faston connector INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation. 4 Cut the compressor pipes (below the soldered joint) using a pipe cutter. a Compressor pipe 5 Remove the 3 nuts and remove the compressor from the unit. (C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A + Service manual RXA20~35A + RXA42+50B...
  • Page 52 Components a Nut b Compressor c Damper 6 Remove the 3 dampers from the compressor. INFORMATION The compressor dampers may look different. 7 Remove the bushings and keep them for re-use. 8 To install the compressor, see "2.2.2 Repair procedures" [  50]. To install the compressor 1 Check the state of the dampers.
  • Page 53 Components 4 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa. 5 Wrap a wet rag around the compressor pipes and solder the compressor pipes to the refrigerant pipes. a Compressor pipe CAUTION Overheating the compressor pipes (and the oil inside the compressor pipes) will damage or destroy the compressor.

  • Page 54: Expansion Valve

    Components a Compressor wire terminals cover 9 Add refrigerant refrigerant circuit, "3.2.2  Repair procedures" [  137]. 10 Install the compressor insulation, see "2.2.2 Repair procedures" [  50]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
  • Page 55 Components 2 Slide the expansion valve magnet over the expansion valve body and gently rotate the magnet clockwise/counterclockwise to manually close/open the expansion valve. Does the expansion valve open? Action Perform an electrical check of the expansion valve, see "2.3.1 Checking procedures" [  54].

  • Page 56: Repair Procedures

    Components INFORMATION When power is switched ON, PCB checks all expansion valve coil windings by current check. If winding is short or open, expansion valve error is triggered. 2 Start the unit operation via the user interface. 3 With the unit operating, connect the service monitoring tool to the unit. 4 When the expansion valve is closed, check the valve inlet and outlet for any leaks.
  • Page 57 Components 1 If needed, remove any parts or insulation to create more space for the removal. 2 Pull up the expansion valve motor to remove it from the expansion valve body. INFORMATION It may be needed to turn the expansion valve coil 1/8 turn counter clockwise to unlock it.
  • Page 58 Components a Putty b Expansion valve pipe c Expansion valve body a Expansion valve pipe b Expansion valve body INFORMATION The expansion valve and motor can have a different configuration / layout. 3 Cut the expansion valve pipes using a pipe cutter. 4 Remove the expansion valve body.
  • Page 59 Components CAUTION Overheating the valve will damage or destroy it. 4 After soldering is done, stop the nitrogen supply after the component has cooled‑down. a Putty b Expansion valve pipe c Expansion valve body a Expansion valve pipe b Expansion valve body INFORMATION The expansion valve and motor can have a different configuration / layout.
  • Page 60 Components INFORMATION The expansion valve motor is equipped with a pipe retention clip. Install the pipe retention clip over the pipe to lock the expansion valve motor. a Expansion valve motor b Pipe retention clip c Pipe 2 Route the expansion valve motor harness towards the appropriate PCB. 3 Connect the expansion valve motor connector to the appropriate PCB.

  • Page 61: Front Panel Motor

    Components a Expansion valve motor b Metal bracket c Nipple d Notch e Expanion valve body 2 Route the expansion valve motor harness towards the appropriate PCB. 3 Connect the expansion valve motor connector to the appropriate PCB. WARNING When reconnecting a connector to the PCB, do NOT apply force, as this may damage the connector or connector pins of the PCB.

  • Page 62: Repair Procedures

    Components Pins Measured resistance (Ω) Front panel motor resistance Action measurements are correct? Return to the troubleshooting of the specific error and continue with the next procedure. Replace the front panel motor, see "2.4.2 Repair procedures" [  62]. 2.4.2 Repair procedures To remove the front panel motor Prerequisite: Stop the unit operation via the user interface.

  • Page 63: High Pressure Switch

    Components CAUTION Make sure the motor axle is well aligned with the slot in the gear when installing the motor. a Screw b Front panel motor Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.

  • Page 64: Repair Procedures

    Components f High pressure switch reset pressure 3 Disconnect the Faston connectors from the high pressure switch. 4 Measure the resistance between the Faston connections of the high pressure switch. The switch MUST be closed. 5 Fill the refrigerant circuit with nitrogen until pressurized just above operating pressure of the high pressure switch.
  • Page 65 Components a High pressure switch b Faston connector c High pressure switch pipe 3 Cut the high pressure switch pipe using a pipe cutter. 4 Remove the high pressure switch from the unit. 5 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa.

  • Page 66: Humidity Sensor

    Components CAUTION Overheating the pressure switch will damage or destroy it. 4 After soldering is done, stop the nitrogen supply after the component has cooled‑down. 5 Connect the Faston connectors to the high pressure switch. 6 Add refrigerant refrigerant circuit, "3.2.2 ...
  • Page 67 Components a Humidity sensor PCB assembly 3 To install the humidity sensor PCB assembly, see "2.6.2  Repair procedures" [  66]. To install the humidity sensor 1 Click the humidity sensor PCB assembly on the indoor unit. a Humidity sensor PCB assembly 2 Route the humidity sensor harness inside the switch box, along the harness retainers.

  • Page 68: Indoor Unit Fan Motor

    Components 2.7 Indoor unit fan motor 2.7.1 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 1 Check the friction of the DC fan motor shaft bearing. Is the DC fan motor shaft friction Action normal?
  • Page 69 Components a Grouding wire cover screw b Grounding wire screw c Heat exchanger thermistor d Indoor unit PCB e Switch box screw f Switch box 4 Disconnect the connectors of the indoor unit fan motor and the front wiring from the indoor unit PCB 5 Remove the screw and remove the switch box from the indoor unit.
  • Page 70 Components a Indoor unit fan motor cover 4 Put the switch box in place. a Grouding wire cover screw b Grounding wire screw c Heat exchanger thermistor d Indoor unit PCB e Switch box screw f Switch box 5 Route the connectors of the indoor unit fan motor and front wiring inside the switch box and connect them to the indoor unit PCB.

  • Page 71: Indoor Unit Pcb

    Components 2.8 Indoor unit PCB 2.8.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a power check of the indoor unit PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [...
  • Page 72 Components To perform an electrical check of the indoor unit PCB Prerequisite: First perform a power check of the indoor unit PCB, see "2.8.1 Checking procedures" [  71]. 1 Measure the voltage between the pins 1‑4 of the connector S102. The measured voltage MUST be 320 VDC. a Connector S102 Is the measured voltage on the indoor Action...
  • Page 73 Components Does the HAP LED blink in regular Action intervals (1 second ON/1 second OFF)? Replace the indoor unit PCB, see "2.8.2 Repair procedures" [  74]. To check if the correct spare part is installed Prerequisite: First perform all earlier checks of the indoor unit PCB, see "2.8.1 Checking procedures" [  71].

  • Page 74: Repair Procedures

    Components a Fuse Blown fuse on the indoor unit PCB? Action Replace the blown fuse, see "2.8.2 Repair procedures" [  74]. Return to "2.8.1 Checking procedures" [  71] of the indoor unit 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 75 Components Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [  99]. 1 Disconnect all connectors from the indoor unit PCB. 2 Carefully pull the indoor unit PCB from the PCB supports. a Indoor unit (power) PCB b PCB support c Indoor unit (control) PCB...
  • Page 76 Components 1 Install the indoor unit PCB in the correct location on the PCB supports. a Indoor unit (power) PCB b PCB support c Indoor unit (control) PCB 2 Connect all connectors to the indoor unit PCB. INFORMATION Use the wiring diagram and connection diagram for correct installation of the connectors, see "5.2 Wiring diagram" [...
  • Page 77 Components Is the problem solved? Action Return to "2.8.1 Checking procedures" [  71] of the indoor unit PCB and continue with the next procedure. To remove a fuse of the indoor unit PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.

  • Page 78: Intelligent Thermal Sensor

    Components 2.9 Intelligent thermal sensor 2.9.1 Checking procedures 1 As there is no specific check procedure for this component, first perform a check of the indoor unit PCB to check if the intelligent thermal sensor needs to be replaced. See "2.8.1 Checking procedures" [  71].

  • Page 79: Inverter Pcb

    Components a Intelligent thermal sensor assembly 2 Route the intelligent thermal sensor harness inside the switch box, along the harness retainers. 3 Connect the intelligent thermal sensor harness to the appropriate connector on the indoor unit PCB. WARNING When reconnecting a connector to the PCB, do NOT apply force, as this may damage the connector or connector pins of the PCB.
  • Page 80 Components INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation. Connect the Faston connectors to the Inverter Analyzer (SPP number 2238609). 4 Turn ON the power of the unit. 5 Use the remote control to activate the inverter test: ▪...

  • Page 81: Repair Procedures

    Components All LED’s of the inverter analyzer are lit Action during inverter test? Return to "2.10.1 Checking procedures" [  79] of the inverter PCB and continue with the next procedure. Replace the inverter PCB, see "2.10.2 Repair procedures" [  81]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required.
  • Page 82 Components Class 20~35 a Black wire b White wire Class 42~50 a Black wire b White wire Is the measured voltage on the PCB Action correct? Return to "2.11.1 Checking procedures" [  81] of the PCB and continue with the next procedure. Continue with the next step.
  • Page 83 Components Class 20~35 a HAP LED Class 42~50 a HAP LED Does the HAP LED blink in regular Action intervals (1 second ON/1 second OFF)? Return to "2.11.1 Checking procedures" [  81] of the main PCB and continue with the next procedure. Replace the main PCB, see "2.11.2 Repair procedures" [  85].
  • Page 84 Components Is the correct spare part for the PCB Action installed? Return to "2.11.1 Checking procedures" [  81] of the main PCB and continue with the next procedure. Replace the main PCB, see "2.11.2 Repair procedures" [  85]. To check the wiring of the main PCB Prerequisite: First perform all earlier main PCB checks, see "2.11.1 ...

  • Page 85: Repair Procedures

    Components Class 42~50 a Fuse Blown fuse on the main PCB? Action Replace the blown fuse, see "2.11.2 Repair procedures" [  85]. Return to "2.11.1 Checking procedures" [  81] of the main 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 86 Components To remove the main PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [  99]. 1 Disconnect all connectors from the main PCB. Class 20~35 a Screw Class 42~50...
  • Page 87 Components Class 20~35 a Screw Class 42~50 a Screw For all models 3 Install and tighten the screws. 4 Connect all connectors to the main PCB. INFORMATION Use the wiring diagram and connection diagram for correct installation of the connectors, see "5.2 Wiring diagram" [  145].
  • Page 88 Components To remove a fuse of the main PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [  99]. 1 Remove the fuse from the PCB. Class 20~35 a Fuse Class 42~50...

  • Page 89: Outdoor Unit Fan Motor

    Components Class 20~35 a Fuse Class 42~50 a Fuse Is the problem solved? Action No further actions required. Return to "2.11.1 Checking procedures" [  81] of the PCB and continue with the next procedure. 2.12 Outdoor unit fan motor 2.12.1 RXA20~35A3+5 units Checking procedures INFORMATION It is recommended to perform the checks in the listed order.
  • Page 90 Components Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [  99]. 1 If propeller fan blade touches the bellmounth, check if the fan motor is correctly mounted on its base, see "Repair procedures" [  91].
  • Page 91 Components 7 Check that the DC fan motor connector is properly connected to the PCB. 8 Unplug the DC fan motor connector and measure the resistance between the pins 1-3, 1-5, and 3-5 of the DC fan motor connector. Result: All measurements MUST be 52.7~58.3 Ω. INFORMATION Winding resistance values above are given for reference.
  • Page 92 Components a Nut b Propeller fan blade assembly 3 Pull and remove the propeller fan blade assembly from the DC fan motor assembly. INFORMATION Use a pulley remover if the propeller cannot be removed manually. 4 To install the propeller fan blade assembly, see "Repair procedures" [  91].

  • Page 93: Rxa20~35A2 + Class 42~50 Units

    Components a Nut b Propeller fan blade assembly Is the problem solved? Action No further actions required. Return to "Checking procedures" [  89] of the outdoor unit fan motor and continue with the next procedure. 2.12.2 RXA20~35A2 + class 42~50 units Checking procedures INFORMATION It is recommended to perform the checks in the listed order.
  • Page 94 Components Is the propeller fan blade assembly Action damaged? Perform a mechanical check of the DC fan motor assembly, see "Checking procedures" [  93]. To perform a mechanical check of the DC fan motor assembly Prerequisite: First perform a mechanical check of the propeller fan blade assembly, see "Checking procedures" [...
  • Page 95 Components 3 Turn OFF the unit via the user interface. 4 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. 5 Disconnect the DC fan motor connector S70 and measure the resistance on the connector pins shown below.
  • Page 96 Components 3 Turn OFF the unit via the user interface. 4 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. 5 Disconnect the DC fan motor connector S70 and measure the resistance on the connector pins shown below.
  • Page 97 Components Pulses are measured during fan blade Action propeller rotation? Perform a check of the main PCB, see "2.11.1 Checking procedures" [  81]. Replace the DC fan motor, see "Repair procedures" [  97]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required.
  • Page 98 Components 4 To install the propeller fan blade assembly, see "Repair procedures" [  97]. To remove the DC fan motor assembly 1 Remove the propeller fan blade assembly from the DC fan motor assembly, "Repair procedures" [  97]. 2 Disconnect the DC fan motor connector from the main PCB. 3 Unlock the ferrite bead.

  • Page 99: Plate Work

    Components b Propeller fan blade assembly Is the problem solved? Action No further actions required. Return to "Checking procedures" [  93] of the outdoor unit fan motor and continue with the next procedure. 2.13 Plate work 2.13.1 Outdoor unit To remove the refrigerant connection cover DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING 1×...
  • Page 100 Components To remove the top plate INFORMATION This procedure is just an example and may differ on some details for your actual unit. Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Loosen and remove the screws that fix the top plate. a Screw b Top plate 2 Remove the top plate.
  • Page 101 Components a Compressor sound insulation To remove the switch box INFORMATION This procedure is just an example and may differ on some details for your actual unit. Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [...
  • Page 102 Components 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. 5 Remove the wire clamp. 6 Remove the screws that fix the right side plate assembly. 7 Cut the cable tie.
  • Page 103 Components a Cable tie b Switch box 8 Lift and remove the switch box from the outdoor unit. 9 To install the switch box, see "2.13 Plate work" [  99]. To install the switch box INFORMATION This procedure is just an example and may differ on some details for your actual unit. 1 Install the switch box on the correct location in the outdoor unit.
  • Page 104 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 105: 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 2.13.2 Indoor unit To open the front panel 1 Hold the front panel on both sides and open it. Open the front panel using the user interface.
  • Page 106 Components Note: Press and hold again for at least 2 seconds to close the front panel. 4 Turn the power supply off. 5 Pull down both locks on the back of the front panel. 6 Open the front panel until the support fits into the fixing tab. a Lock (1 on each side) b Backside of the front panel c Fixing tab...
  • Page 107 Components 2 Open the panel locks located on the back side of the panel (1 on each side). a Panel lock 3 Push the right arm lightly to the right to disconnect the shaft from the shaft slot on the right side. a Arm b Shaft c Shaft slot...
  • Page 108 Components To remove the front grille CAUTION Wear protective gloves. 1 Open the front panel. Refer to "To open the front panel" [  105]. 2 Remove the service cover. Refer to "To open the service cover" [  107]. 3 Remove the wire harness from the wire clamp and the connector. 4 Remove the flap by pushing it to the left side and towards you.

  • Page 109: Reactor

    Components To re-install the front grille 1 Install the front grille and firmly engage the 3 upper hooks. 2 Tighten the 2 screws and put the 2 screw covers back. 3 Re-install the flap. 4 Insert the wire harness back into the connector and secure it with the wire clamp.

  • Page 110: Repair Procedures

    Components a Compressor wire terminals cover 4 Disconnect the wiring from the reactor. INFORMATION The reactor will trip at a temperature of 115°C and will reset at a temperature of 95°C. 5 Using a megger device of 500 V DC, check the insulation resistance. Make sure there is no earth leakage.
  • Page 111 Components a Compressor wire terminals cover 4 Disconnect the connector. 5 Remove the clip and remove the reactor from the compressor. 6 To install the reactor, see "2.14.2 Repair procedures" [  110]. To install the reactor 1 Install the reactor in the correct location and install the clip. 2 Connect the reactor connector.

  • Page 112: Streamer Unit

    Components 2.15 Streamer unit 2.15.1 Checking procedures 1 As there is no specific check procedure for this component, first perform a check of the indoor unit PCB to check if the streamer unit needs to be replaced. See "2.8.1 Checking procedures" [  71].

  • Page 113: Swing Flap Motor

    Components To install the streamer unit 1 Install the streamer unit in the correct location on the indoor unit. a Streamer unit connector b Streamer unit c Retainer 2 Route the streamer unit harness inside the switch box and through the retainers.
  • Page 114 Components 2 Measure the resistance between the following pins of the motor connector. The measurements MUST be as shown in the table below. Pins Measured resistance (Ω) Swing flap motor resistance Action measurements are correct? Return to the troubleshooting of the specific error and continue with the next procedure.
  • Page 115 Components a Screw b Swing flap motor gearcase assembly 3 Disconnect the swing flap motor harness from the swing flap motor. 4 To install the swing flap motor gearcase assembly, see "Repair procedures" [  114]. To install the swing flap motor gearcase assembly 1 Connect the swing flap motor harness to the swing flap motor connector.

  • Page 116: Secondary Swing Flap Motor

    Components 2.16.2 Secondary swing flap motor Checking procedures To perform an electrical check of the swing flap motor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.13 Plate work" [  99].
  • Page 117 Components a Fan guard b Rocker arm c Swing raster 4 Remove the 3 screws from the swing flap motor gear case assembly. Do NOT yet remove the assembly from the indoor unit. a Screw b Swing flap motor gearcase assembly 5 Disconnect the rocker arm from the swing raster.

  • Page 118: Swing Raster Motor

    Components a Screw b Swing flap motor gearcase assembly 3 Connect the rocker arm to the swing raster. a Fan guard b Rocker arm c Swing raster 4 Tighten the 3 screws to fix the swing flap motor assembly. 5 Connect the harness to the swing flap motor connector. 6 Install the right side fan guard on the indoor unit (by clicking it on).

  • Page 119: Repair Procedures

    Components Prerequisite: Remove the required plate work, see "2.13 Plate work" [  99]. 1 Disconnect the motor connector from the indoor unit PCB. 2 Measure the resistance between the following pins of the motor connector. The measurements MUST be as shown in the table below. Pins Measured resistance (Ω) Swing raster motor resistance...
  • Page 120 Components Prerequisite: Remove the required plate work, see "2.13 Plate work" [  99]. 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...
  • Page 121 Components T °C kΩ T °C kΩ T °C kΩ T °C kΩ –19 186.53 38.08 10.21 3.32 –18 175.97 36.30 9.81 3.21 –17 166.07 34.62 9.42 3.11 –16 156.80 33.02 9.06 3.01 –15 148.10 31.50 8.71 2.91 –14 139.94 30.06 8.37 2.82...
  • Page 122 Components INFORMATION All thermistors have a resistance tolerance of 3%. INFORMATION In most cases, the user interface allows to monitor the thermistors. If the measured resistance value matches the resistance determined through the measured temperature, but the temperature for the corresponding thermistor is NOT correct on the user interface display, replace the applicable PCB.
  • Page 123 Components a Tie strap b Insulation c Thermistor wire d Clip e Thermistor f Thermistor holder 3 Cut and remove the insulation. 4 Pull the clip that fixes the thermistor. 5 Remove the thermistor from the thermistor holder. 6 Cut all tie straps that fix the thermistor harness. 7 Disconnect the thermistor connector from the appropriate PCB and remove the thermistor.
  • Page 124 Components a Clip b Thermistor c Thermistor holder d Insulation e Thermistor wire f Tie strap 2 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 "5.2 Wiring diagram" [...

  • Page 125: Other Thermistors

    Components WARNING When reconnecting a connector to the PCB, do NOT apply force, as this may damage the connector or connector pins of the PCB. 4 Fix the thermistor harness using new tie straps 5 Install the insulation around the thermistor. 6 Fix the insulation and the thermistor wire using new tie straps.
  • Page 126 Components INFORMATION The thermistors may vary according to the specific unit. 3 Determine the thermistor resistance that matches the measured temperature. Type 1 thermistor T °C kΩ T °C kΩ T °C kΩ T °C kΩ –20 197.81 39.96 10.63 3.44 –19 186.53...
  • Page 127 Components ▪ Measured temperature with contact thermometer: 23.1°C, ▪ Resistance value determined through temperature (using the table for type 1 thermistors): Resistance at 23°C: 21.85 kΩ, Resistance at 24°C: 20.90 kΩ, ▪ Disconnect connector and measure resistance between S600 pin 1‑2: Measured resistance: 21.86 kΩ, ▪...
  • Page 128 Components T °C kΩ T °C kΩ T °C kΩ T °C kΩ –19 186.53 38.08 10.21 3.32 –18 175.97 36.30 9.81 3.21 –17 166.07 34.62 9.42 3.11 –16 156.80 33.02 9.06 3.01 –15 148.10 31.50 8.71 2.91 –14 139.94 30.06 8.37 2.82...

  • Page 129: Wifi Control Pcb

    Components INFORMATION All thermistors have a resistance tolerance of 3%. Does the measured resistance of the Action thermistor match with the temperature determined resistance? Thermistor is OK. Return to the troubleshooting of the specific error and continue with the next procedure. Replace the specific PCB, see "2 Components" [  39].
  • Page 130 Components a Wifi control PCB assembly 3 To install wifi control assembly, "2.19.2  Repair procedures" [  129]. To install the wifi control PCB 1 Click the wifi control PCB assembly on the indoor unit. a Wifi control PCB assembly 2 Route the wifi control PCB harness inside the switch box, along the harness retainers.

  • Page 131: Third Party Components

    Third party components 3 Third party components 3.1 Electrical circuit 3.1.1 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 "2.13 Plate work" [  99].

  • Page 132: Repair Procedures

    Third party components Does the unit receive power? Action Correct the wiring from the main power supply terminal to the indoor unit power supply terminal, see "3.1.2 Repair procedures" [  132]. Adjust the power supply to the unit, see "3.1.2 Repair procedures" [  132]. To check the wiring between the outdoor unit and the indoor unit 1 Check that all wires are properly connected and that all connectors are fully plugged‑in.

  • Page 133: Refrigerant Circuit

    Third party components INFORMATION If applicable, also check the electrical components between the main power supply terminal and the indoor unit power supply terminal (e.g. intermediate terminal, noise filter, …). Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
  • Page 134 Third party components To check if the refrigerant circuit is clogged Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Wait for the refrigerant to reach the outdoor temperature. 2 Connect a manometer to the high pressure and low pressure service ports. 3 Turn ON the power of the unit.
  • Page 135 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 136 Third party components Cooling The opening degree of the electronic Fan control, i.e., expansion valve comes larger. actually hunting to Either electronic expansion valve maintain high pressure fully opens. on the cooling control with low outdoor air. Operating frequency comes to the lowest level.

  • Page 137: Repair Procedures

    Third party components 3 Measure the pressure of the refrigerant. The measured pressure MUST be in line with the expected pressure at ambient temperature. 4 If the measured pressure is higher than the expected pressure (at ambient temperature), other non‑condensables are mixed in the refrigerant. Any non‑condensables found in the Action refrigerant circuit?
  • Page 138 Third party components 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. To replace the clogged/leaking part of the refrigerant circuit 1 See the correct procedure for the component that needs to be repaired.
  • Page 139 Third party components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To add refrigerant 1 See the installer reference guide for the correct procedure. Is the problem solved? Action No further actions required.

  • Page 140: External Factors

    Third party components CAUTION Some outdoor units are equipped with a low pressure switch to protect the compressor by switching it off. NEVER short‑circuit the low pressure switch during pump down operation. 1 Remove the refrigerant connection cover, see "2.13 Plate work" [  99].

  • Page 141: Repair Procedures

    Third party components Is the outdoor temperature within the Action operating range? Return to the troubleshooting of the specific error and continue with the next procedure. Wait for the outdoor temperature to return within the operating range. To check for objects that may block the airflow 1 Check for the presence of objects near the indoor unit that may block the airflow.

  • Page 142: Maintenance

    Maintenance 4 Maintenance 4.1 To clean the outdoor unit heat exchanger 1 Straighten the hair fins. 2 Clear the outdoor unit heat exchanger from dust, leaves,… using a fin-comb or compressed air/N CAUTION Avoid bending or damaging the hair fins of the outdoor unit heat exchanger during the cleaning process.
  • Page 143 Maintenance 4 Wash the air filters with water or clean them with a vacuum cleaner. 5 Soak in lukewarm water for about 10 to 15 minutes. INFORMATION ▪ If the dust does NOT come off easily, wash the air filters with a neutral detergent diluted in lukewarm water.

  • Page 144: Technical Data

    Technical data 5 Technical data 5.1 Detailed information setting mode 5.1.1 Detailed information setting mode: Indoor unit See the installer reference guide on business portal for more information. 5.1.2 Detailed information setting mode: Outdoor unit See the installer reference guide on business portal for more information. 5.1.3 Detailed information setting mode: Remote controller See the installer reference guide on business portal for more information.

  • Page 145: Wiring Diagram

    Technical data 5.2 Wiring diagram 5.2.1 Wiring diagram: Indoor unit The wiring diagram is delivered with the unit, located inside of the outdoor unit (bottom side of the top plate). (1) Wiring diagram English Translation Wiring diagram Wiring diagram Indoor unit Indoor unit Outdoor unit Outdoor unit...
  • Page 146 Technical data (3) Legend Printed circuit Button switch Capacitor CN*, S, FG Connector Heat exchanger Fuse Pilot lamp Buzzer Motion detection sensor Magnetic relay Motor (indoor fan) M1S, M2S, M3S Motor (swing flap) Motor (front panel) R1T, R2T Thermistor Varistor Signal receiver S1RH Humidity sensor...

  • Page 147: Wiring Diagram: Outdoor Unit

    Technical data 5.2.2 Wiring diagram: Outdoor unit See the internal wiring diagram supplied with the unit (on the inside of the top plate). The abbreviations used are listed below. Class 20~35 (1) Wiring diagram English Translation Wiring diagram Wiring diagram Indoor Indoor Outdoor...
  • Page 148 Technical data (3) Legend Capacitor Diode bridge E1, E2, HL1, HN1, S Connector FU1, FU2, FU3 Fuse IPM* Intelligent power module Live Compressor motor Fan motor Magnetic relay Neutral Pulse‑amplitude modulation Printed circuit board Switching power supply Overload protector R1T, R2T, R3T Thermistor S2 -S90 Terminal connector...
  • Page 149 Technical data Class 42~50 (1) Wiring diagram English Translation Wiring diagram Wiring diagram Indoor Indoor Outdoor Outdoor Condenser Condenser Discharge Discharge (2) Notes English Translation Connection Main terminal Field supply Protective earth Earth Field wire NOTES: BLK : Black WHT : White BRN : Brown RED : Red GRN : Green...
  • Page 150 Technical data Fan motor Magnetic relay Neutral N = 4, N= 5 Number of passes Pulse‑amplitude modulation Printed circuit board Switching power supply Overload protector R1T, R2T, R3T Thermistor S1PH High pressure switch S2 -S90 Terminal connector Surge arrestor V1 , V2, V3 Varistor X11A Connector...

  • Page 151: Piping Diagram

    Technical data 5.3 Piping diagram 5.3.1 Piping diagram: Indoor unit 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 152: Piping Diagram: Outdoor Unit

    Technical data 5.3.2 Piping diagram: Outdoor unit RXA20~35A a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø9.5 mm flare connection) c Stop valve (liquid) d Stop valve with service port (gas) e Muffler with filter f Heat exchanger g Accumulator h Muffler M1C Compressor...
  • Page 153 Technical data RXA42~50A S1PH a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø12.7 mm flare connection) c Stop valve (liquid) d Stop valve (gas) e Muffler f Gas receiver g Filter h Muffler with filter i Heat exchanger j Accumulator M1C Compressor M1F Fan...
  • Page 154 Technical data RXA42~50B S1PH a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø12.7 mm flare connection) c Stop valve (liquid) d Stop valve (gas) e Muffler f Liquid receiver g Filter h Muffler with filter i Heat exchanger j Accumulator M1C Compressor M1F Fan...

  • Page 155: Component Overview

    Technical data 5.4 Component overview 5.4.1 Component overview: Indoor unit a Heat exchanger b Front panel motor C Heat exchanger thermistor R1T e Swing raster motor f Secondary swing flap motor g Main swing flap h Secondary swing flap (C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A + Service manual RXA20~35A + RXA42+50B Split Stylish R32...
  • Page 156 Technical data i Streamer unit j Indoor unit PCB k Switch box l Wifi control PCB m Humidity sensor PCB (including room thermistor R2T) n Intelligent thermal sensor o Swing raster p Main swing flap motor (C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A + Service manual RXA20~35A + RXA42+50B Split Stylish R32...

  • Page 157: Component Overview: Outdoor Unit

    Technical data 5.4.2 Component overview: Outdoor unit RXA20~35A a Air thermistor R1T b Heat exchanger c Expansion valve d Heat exchanger thermistor R2T e Muffler with filter f Stop valve with service port (gas) g Stop valve (liquid) h 4‑way valve coil i Main + inverter PCB j Service PCB k Muffler...
  • Page 158 Technical data RXA42~50A a Air thermistor R1T b Heat exchanger c Expansion valve d Muffler e Heat exchanger thermistor R2T f Muffler with filter g Gas receiver h Stop valve with service port (gas) i Stop valve (liquid) j 4‑way valve coil k Main + inverter PCB l Service PCB m High pressure switch...
  • Page 159 Technical data RXA42~50B a Air thermistor R1T b Heat exchanger c Muffler d Heat exchanger thermistor R2T e Liquid receiver f Stop valve with service port (gas) g Stop valve (liquid) h Muffler with filter i Discharge pipe thermistor R3T j 4‑way valve coil k Main + inverter PCB l Terminal block...

  • Page 160: Field Information Report

    Technical data 5.5 Field information report See next page. (C)(F)TXA15~50A(W)(S)(T) + (C)(F)TXA15~50B(B)(S)(T) + RXA42+50A + Service manual RXA20~35A + RXA42+50B Split Stylish R32 ESIE18-03C – 2020.02...
  • Page 161 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 162 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 163: Service Tools

    Technical data 5.6 Service tools 1 For an overview of the available service tools, check the Business Portal: http://www.mydaikin.eu. 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 164: Field Settings

    Technical data 5.7 Field settings 5.7.1 To control heating only mode Prerequisite: Stop operation of the unit. 1 Press , and simultaneously. 2 Press 3 Select SU. 4 Press to confirm. 5 Press 6 Select 19. 7 Press to confirm. 8 Press 9 Select 1 (0: factory setting, 1: heating only).

  • Page 165: To Control The Indoor Unit Fan During Thermostat Off In Cooling

    Technical data 5.7.3 To control the indoor unit fan during thermostat off in cooling 1 Press , and simultaneously. 2 Press 3 Select SU. 4 Press to confirm. 5 Press 6 Select 4. 7 Press to confirm. 8 Press 9 Select 0 (0: fan ON, 1: fan OFF). 10 Press to confirm.
  • Page 168 ESIE18-03C 2020.02 Verantwortung für Energie und Umwelt...

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