Daikin Sensira Series Service Manual
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Daikin Sensira Series Service Manual

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FTXF20~71A
FTXF20~25B
FTXF20~42C
ATXF20~71A
ATXF20~42C
RXF20~71A
RXF20~60B
RXF20~42C
ARXF20~71A
ARXF20~42C
Service manual
Split Sensira R32
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  • Page 1 Service manual Split Sensira R32 FTXF20~71A FTXF20~25B FTXF20~42C ATXF20~71A ATXF20~42C RXF20~71A RXF20~60B RXF20~42C ARXF20~71A ARXF20~42C...
  • 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 ESIE18-12 Document release October 2018 ESIE18-12B See below June 2019 The following updates have been applied to the Service Manual: • Outdoor unit models RXF50B and RXF60B added. • Indoor unit models ATXF25A and ATXF35A added. •...

  • 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 in winter season ......................
  • Page 5 Table of contents 2.5.2 Repair procedures ............................65 Indoor unit main PCB ..............................67 2.6.1 Checking procedures ............................67 2.6.2 Repair procedures ............................69 Inverter PCB ..................................72 2.7.1 Checking procedures ............................72 2.7.2 Repair procedures ............................74 Main PCB ..................................74 2.8.1 Class 20~42 units ............................

  • Page 6: 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 7: To Perform A Test Run In Winter Season

    Troubleshooting 1.4.1 To perform a test run in winter season When operating the air conditioner in Cooling mode in winter, set it to test run operation using the following method. For FTXF and ATXF units 1 Press to switch the system on. 2 Press the centre of simultaneously.

  • Page 8: A5-00 - Outdoor Unit: High Pressure Peak Cut / Freeze Protection Problem

    Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 1.5.2 A5-00 – Outdoor unit: High pressure peak cut / freeze protection problem Trigger Effect Reset During cooling operation, Unit will stop operating. Automatic reset when indoor heat exchanger temperature is within...

  • Page 9: A6-00 - Indoor Unit Fan Motor Abnormality

    Troubleshooting 1.5.3 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 10: C9-00 - Room Thermistor Abnormality

    Troubleshooting 1.5.5 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 indoor unit air (room) thermistor.

  • Page 11: E3-00 - Outdoor Unit: Actuation Of High Pressure Switch

    Troubleshooting Possible cause: Faulty compressor or miswiring of the compressor power supply cable. Prerequisite: Stop the unit operation via the user interface. 5 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 12: E5-00 - Outdoor Unit: Overheat Of Inverter Compressor Motor

    Troubleshooting 5 Check for the presence of non‑condensables and/or humidity in the refrigerant circuit. See "3.2 Refrigerant circuit" [  129]. Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. 6 Check if the refrigerant circuit is clogged. See "3.2 Refrigerant circuit" [  129]. Possible cause: Clogged refrigerant circuit. 7 Perform a check of the outdoor unit fan motor.

  • Page 13: E6-00 - Outdoor Unit: Compressor Startup Defect

    Troubleshooting 9 Check for the presence of non‑condensables and/or humidity in the refrigerant circuit. See "3.2 Refrigerant circuit" [  129]. Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. 10 Check if the refrigerant circuit is clogged. See "3.2 Refrigerant circuit" [  129]. Possible cause: Clogged refrigerant circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.

  • Page 14: E7-00 - Outdoor Unit: Malfunction Of Outdoor Unit Fan Motor

    Troubleshooting Possible cause: Faulty expansion valve. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 1.5.10 E7-00 – Outdoor unit: Malfunction of outdoor unit fan motor Trigger Effect Reset Fan does NOT start Unit will stop operating.

  • Page 15: Outdoor Unit: Cool/Heat Switchover Problem

    Troubleshooting Possible cause: Faulty compressor or miswiring of the compressor power supply cable. 3 Perform a check of the main PCB. See "2.8 Main PCB" [  74]. Possible cause: Faulty main PCB. 4 Check if the power supply is conform with the regulations. See "3.1 Electrical circuit" [  127].

  • Page 16: F3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Temperature

    Troubleshooting Possible cause: Refrigerant overcharge or shortage. 8 Check for the presence of non‑condensables and/or humidity in the refrigerant circuit. See "3.2 Refrigerant circuit" [  129]. Possible cause: Non‑condensables and/or humidity in the refrigerant circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.

  • Page 17: F6-00 - Outdoor Unit: Abnormal High Pressure In Cooling

    Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 1.5.14 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.

  • Page 18: F8-00 - System Shutdown Due To Compressor Internal Temperature Abnormality

    Troubleshooting 1.5.15 F8-00 – System shutdown due to compressor internal temperature abnormality Trigger Effect Reset Temperature discharge Unit will stop operating. Manual reset via user pipe thermistor exceeds interface. the determined limit. 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 19: H3-00 - Outdoor Unit: Malfunction Of High Pressure Switch

    Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (imbalance >4%), ▪ Power drop, ▪ Short circuit. Prerequisite: Stop the unit operation via the user interface. 3 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 20: H6-00 - Outdoor Unit: Malfunction Of Position Detection Sensor

    Troubleshooting 1.5.18 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 21: H8-00 - Outdoor Unit: Malfunction Of Compressor Input System

    Troubleshooting 1.5.19 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 22: J3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Thermistor

    Troubleshooting 1.5.21 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 23: 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 "2.8 Main PCB" [  74]. Possible cause: Faulty main PCB. 2 Perform a check of the outdoor unit fan motor. See "2.9 ...

  • Page 24: L5-00 - Outdoor Unit: Inverter Instantaneous Overcurrent

    Troubleshooting 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 Check that the thermal interface grease is applied properly on the (PCB or refrigerant piping) contact surface of the heat sink.

  • Page 25: P4-00 - Outdoor Unit: Malfunction Of Radiating Fin Temperature Sensor

    Troubleshooting Prerequisite: Stop the unit operation via the user interface. 8 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. 9 Check that the thermal interface grease is applied properly on the (PCB or refrigerant piping) contact surface of the heat sink.

  • Page 26: U2-00 - Outdoor Unit: Defect Of Power Supply Voltage

    Troubleshooting 2 Check that all stop valves of the refrigerant circuit are open. See "3.2 Refrigerant circuit" [  129]. Possible cause: Closed stop valve in the refrigerant circuit. 3 Check if the refrigerant circuit is clogged. See "3.2 Refrigerant circuit" [  129]. Possible cause: Clogged refrigerant circuit. 4 Check if the refrigerant circuit is correctly charged.

  • Page 27: U4-00 - Indoor/Outdoor Unit Communication Problem

    Troubleshooting 3 Perform a check of the outdoor unit fan motor. See "2.9  Outdoor unit fan motor" [  92]. Possible cause: Faulty outdoor unit fan motor. 4 Perform a check of the main PCB. See "2.8 Main PCB" [  74]. Possible cause: Faulty main PCB. 5 Wait until the compressor restarts.

  • Page 28: Indoor Unit, Outdoor Unit Mismatching Problem

    Troubleshooting 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. 7 Check that the thermal interface grease is applied properly on the (PCB or refrigerant piping) contact surface of the heat sink.

  • Page 29: 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 30: 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 31: 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 32: 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 33: 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 34: 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. 1.6.7 Indoor fan starts operating but the compressor does not operate Check Detail Check the power supply.

  • Page 35: 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 36: Unit Discharges White Mist

    Troubleshooting 1.6.10 Unit discharges white mist Check Detail Check installation conditions. ▪ Humid site. ▪ Dirty site. ▪ Oil mist. Check installation conditions. Dirty heat exchanger. Air filter. Dirty air filter. Fan motor. Defective fan motor. 1.6.11 Swing flap does not operate Symptom Check Detail...

  • Page 37: Components

    Components 2 Components CAUTION When replacing a component ALWAYS make sure the correct spare part for your unit is installed. 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.
  • Page 38 Components Is the measured value correct? Action Replace the 4‑way valve coil, see "2.1.2 Repair procedures" [  41]. 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 39 Components 12 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: Class Voltage Class 20~42 12 V DC when operating in Heating mode 0 V DC when operating in Cooling mode Class 50~71 220~240 V AC when operating in...
  • Page 40 Components Refrigerant pressure correct? Action Replace the body of the 4‑way valve, "2.1.2 Repair procedures" [  41]. Leaks may be found in the refrigerant circuit. Perform a pressure test of the refrigerant circuit, see "3.2.1 Checking procedures" [  129]. 5 De-activate Heating and activate Cooling operation via the user interface. 6 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.

  • Page 41: Repair Procedures

    Components 2.1.2 Repair procedures To remove the 4-way valve coil Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.10 Plate work" [  101]. Prerequisite: If needed, remove any parts to create more space for the removal of the 4‑way valve coil.
  • Page 42 Components a 4‑way valve pipe b 4‑way valve c Putty d Insulation 3 Remove the 4‑way valve. 4 Keep the putty (if installed) and the insulation (if installed) for re-use. 5 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa.
  • Page 43 Components a 4‑way valve pipe b 4‑way valve c Putty d Insulation 6 Install the putty (if available) and the insulation (if available) in their original location. 7 Install the 4‑way valve coil on the 4‑way valve body, see "2.1.2  Repair procedures" [  41].

  • Page 44: 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 45 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 46 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. U Wire terminal U V Wire terminal V W Wire terminal W CAUTION...
  • Page 47 Components Compressor motor winding Action measurements are correct? Continue with the next step. Replace the compressor, see "2.2.2 Repair procedures" [  49]. 5 Measure the continuity of the U, V and W wires between the compressor and the PCB. If no continuity, correct as needed, see "5.2 Wiring diagram" [  142].
  • Page 48 Components To perform an insulation check of the compressor Prerequisite: First perform an electrical check of the compressor, see "2.2.1 Checking procedures" [  44]. Prerequisite: Stop the unit operation via the user interface. 1 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 49: Repair Procedures

    Components 4 Set the Megger voltage to 500 V DC or 1000 V DC. 5 Measure the insulation resistance between the following terminals. The measured insulation resistance MUST be >3 MΩ. ▪ U–ground, ▪ V–ground, ▪ W–ground. Compressor insulation measurements Action are correct? Compressor is OK. Return to troubleshooting of the specific error and continue with the next procedure.
  • Page 50 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 Cut the compressor pipes (below the soldered joint) using a pipe cutter. a Compressor pipe 5 Supply nitrogen to the refrigerant circuit.
  • Page 51 Components a Nut b Compressor c Damper 9 Remove the 3 dampers from the compressor. INFORMATION The compressor dampers may look different. 10 Remove the bushings and keep them for re-use. 11 To install the compressor, see "2.2.2 Repair procedures" [  49]. To install the compressor 1 Check the state of the dampers.
  • Page 52 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 any other components near the compressor 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...

  • Page 53: Expansion Valve

    Components a Compressor wire terminals cover 9 Add refrigerant refrigerant circuit, "3.2.2  Repair procedures" [  133]. 10 Install the compressor insulation, see "2.2.2 Repair procedures" [  49]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
  • Page 54 Components INFORMATION After the check, remove the magnet from the expansion valve body and install the expansion valve coil on the expansion valve body. Make sure that the expansion valve coil is firmly slid onto the expansion valve body. 3 Slide the expansion valve magnet over the expansion valve body and gently rotate the magnet clockwise/counterclockwise to manually close/open the expansion valve.
  • Page 55 Components a Connector 3 Check the insulation resistance of the coil by measuring the resistance between the pins of each phase (1, 2, 3, 4) and GND on the unit. Result: None of the measurements should be short‑circuit. 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 56: Repair Procedures

    Components sequence you may be able to measure the supply voltage for a short time. If you set the multimeter range to Auto, then most likely you may NOT read a value between switching ranges. The best way to check is to feel the movement of the valve by touching, rather than trying to measure the driving voltage.
  • Page 57 Components a Expansion valve motor cap 3 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. Make sure to note the correct orientation (position) of the expansion valve coil before removal.
  • Page 58 Components 1 Remove the expansion valve motor, see "2.3.2 Repair procedures" [  56]. 2 Remove the putty. Keep for re-use. 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.
  • Page 59 Components 3 Wrap a wet rag around the expansion valve body and solder the expansion valve pipes to the refrigerant pipes. CAUTION Overheating the valve will damage or destroy it. 4 After soldering is done, stop the nitrogen supply after the component has cooled‑down.
  • Page 60 Components To install the expansion valve motor with clip 1 Install the expansion valve motor on the expansion valve body. 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...

  • Page 61: High Pressure Switch

    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, 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 62 Components a High pressure switch protection control b Pressure c High pressure switch closed d High pressure switch open e High pressure switch operating pressure f High pressure switch reset pressure Unit High pressure Operating pressure Reset pressure switch (MPa) (MPa) RXF20~35A + S1PH...

  • Page 63: Repair Procedures

    Components 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. Result: The switch MUST be closed. High pressure switch connector Then measurements are correct?

  • Page 64: Indoor Unit Fan Motor

    Components 7 Stop the nitrogen supply when the piping has cooled down. 8 To install the high pressure switch, see "2.4.2 Repair procedures" [  63]. To install the high pressure switch 1 Install the high pressure switch in the correct location. 2 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa.

  • Page 65: Repair Procedures

    Components To perform a mechanical check of 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 "2.10 Plate work" [  101]. 1 Check the fan for damage, deformations and cracks. Replace the fan as needed.
  • Page 66 Components Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.10 Plate work" [  101]. 1 Remove the switch box, see "2.10 Plate work" [  101]. 2 Click the indoor unit fan motor cover out of the indoor unit. If needed, remove the screw (if installed) on the right hand side of the fan motor cover for easier removal.

  • Page 67: Indoor Unit Main Pcb

    Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. 2.6 Indoor unit main PCB 2.6.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a power check of the indoor unit main PCB Prerequisite: Stop the unit operation via the user interface.
  • Page 68 Components Is the power supply to the indoor unit Action correct? Correct the wiring between the power supply terminal of the indoor unit and the indoor unit PCB, see "2.6.2 Repair procedures" [  69]. See "To check the power supply to the indoor unit"...

  • Page 69: Repair Procedures

    Components To check the fuse of the indoor unit main PCB Prerequisite: First perform all earlier checks of the indoor unit main PCB, see "2.6.1 Checking procedures" [  67]. 1 Measure the continuity of the fuse. If no continuity is measured, the fuse has blown.
  • Page 70 Components Is the problem solved? Action Return to "2.6.1 Checking procedures" [  67] of the indoor unit main PCB and continue with the next procedure. To remove the indoor unit 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 "2.10 Plate work" [...
  • Page 71 Components INFORMATION Use the wiring diagram and connection diagram for correct installation of the connectors, see "5.2 Wiring diagram" [  142]. 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 72: Inverter Pcb

    Components a Fuse Is the problem solved? Action No further actions required. Return to "2.6.1 Checking procedures" [  67] of the indoor unit main PCB and continue with the next procedure. 2.7 Inverter PCB 2.7.1 Checking procedures As the inverter PCB is integrated in the main PCB of the unit, see "2.8 ...
  • Page 73 Components 4 Turn ON the power of the unit. 5 Use the remote control to activate the inverter test: ▪ Press the centre of simultaneously. ▪ Press to select T (test run mode). ▪ Press to select FAN mode. ▪ Press to start power transistor check operation.

  • Page 74: Repair Procedures

    Components Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 2.7.2 Repair procedures As the inverter PCB is integrated in the main PCB of the unit, see "2.8 ...
  • Page 75 Components Is the measured voltage on the PCB Action correct? Return to "Checking procedures" [  74] of the PCB and continue with the next procedure. Continue with the next step. 3 Check the power supply to the unit, see "3.1.1 Checking procedures" [  127].
  • Page 76 Components 2 Enter the model name of your unit and check if the installed spare part number corresponds with the spare part number indicated in the webbank. NOTICE Also check that the correct spare part is installed for the capacity adapter. Is the correct spare part for the PCB Action installed?
  • Page 77 Components a Fuse Blown fuse on the main PCB? Action Replace the blown fuse, see "Repair procedures" [  81]. Return to "Checking procedures" [  74] of the main PCB and continue with the next procedure. To check the rectifier voltage of the main PCB Prerequisite: First perform all earlier main PCB checks, see "Checking procedures" [...
  • Page 78 Components Is the measured rectifier voltage Action correct? Perform a check of the power modules, "Checking procedures" [  74]. Replace the main PCB, see "Repair procedures" [  81]. To perform a diode module check 1 First check the rectifier voltage of the main PCB, see "Checking procedures" [  74].
  • Page 79 Components 0.51~0.52 V 0.51~0.52 V 4 If the diode module is NOT OK, replace the main PCB, see "Repair procedures" [  81]. To perform a power module check Prerequisite: First check the rectifier voltage of the main PCB, see "Checking procedures" [  74]. Prerequisite: Stop the unit operation via the user interface. 1 Turn OFF the respective circuit breaker.
  • Page 80 Components 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 81 Components Are the test results OK? Action Replace the main PCB, see "Repair procedures" [  81]. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
  • Page 82 Components To install the main PCB 1 Apply grease to the PCB contact surface of the heat sink. Distribute the grease as evenly as possible. CAUTION ALWAYS apply new grease on the PCB heat sink. NOT doing so may cause the PCB to fail due to insufficient cooling.
  • Page 83 Components Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.10 Plate work" [  101]. 1 Remove the fuse from the PCB. a Fuse 2 To install a fuse on the main PCB, see "Repair procedures" [  81]. To install a fuse on the main PCB WARNING For continued protection against risk of fire, replace only with same type and rating...

  • Page 84: Class 50~71 Units

    Components 2.8.2 Class 50~71 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. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.10 Plate work" [...
  • Page 85 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 "Checking procedures" [  84] of the main PCB and continue with the next procedure.
  • Page 86 Components 2 Check that all wires are properly connected and that all connectors are fully plugged‑in. 3 Check that no connectors or wires are damaged. 4 Check that the wiring corresponds with the wiring diagram, see "5.2  Wiring diagram" [  142]. INFORMATION Correct the wiring as needed.
  • Page 87 Components 2 Measure the voltage on the rectifier voltage check terminals (+ and –) on the main PCB. Result: The measured voltage MUST be approximately 300~350 V DC. a + terminal b – terminal 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.
  • Page 88 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 89 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 90 Components Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.10 Plate work" [  101]. 1 Disconnect the power supply wires from the main power supply terminal X1M and route the wires out of the ferrite core. 2 Cut the tie strap that fixes the power supply wires to the switch box.
  • Page 91 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 Connector X12A g Compressor connector h Tie strap (compressor harness) i Ferrite core (compressor harness) j Screw k Main PCB 3 Install and tighten the screws.

  • Page 92: Outdoor Unit Fan Motor

    Components 2.9 Outdoor unit fan motor 2.9.1 Class 20~42 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 93 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 94 Components 10 With the DC fan motor connector S71 disconnected from the main PCB, measure the voltage on the connector pins 10-11 (= fan motor control) on the inverter PCB. Result: The voltage MUST be 15±10% V DC. Is the measured voltage correct? Action Continue with the next step.
  • Page 95 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" [  94].

  • Page 96: Class 50~71 Units

    Components CAUTION Do NOT install a damaged propeller fan blade assembly. 2 Install and tighten the nut to fix the propeller fan blade assembly. a Nut b Propeller fan blade assembly Is the problem solved? Action No further actions required. Return to "Checking procedures" [...
  • Page 97 Components Is the propeller fan blade assembly Action damaged? Perform a mechanical check of the DC fan motor assembly, see "Checking procedures" [  96]. 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 98 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. 8 Disconnect the DC fan motor connector S70 and measure the resistance on the connector pins shown below.
  • Page 99 Components CAUTION Ensure that the system CANNOT start the fan. Disable all modes (heating, cooling, …) on the unit. The outdoor 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. Result: 4 pulses MUST be measured.
  • Page 100 Components INFORMATION Use a pulley remover if the propeller cannot be removed manually. 4 To install the propeller fan blade assembly, see "Repair procedures" [  99]. To remove the DC fan motor assembly 1 Remove the propeller fan blade assembly from the DC fan motor assembly, "Repair procedures" [  99].

  • Page 101: Plate Work

    Components a Nut b Propeller fan blade assembly Is the problem solved? Action No further actions required. Return to "Checking procedures" [  96] of the outdoor unit fan motor and continue with the next procedure. 2.10 Plate work 2.10.1 Outdoor unit To remove the refrigerant connection cover DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING...
  • Page 102 Components 1× 3× 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. 1 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 103 Components To remove the front plate INFORMATION This procedure is just an example and may differ on some details for your actual unit. Prerequisite: Remove the top plate, see "2.10 Plate work" [  101]. 1 Loosen and remove the screws that fix the front plate. a Screw b Front plate 2 Remove the front plate.
  • Page 104 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 105 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 "2.10 Plate work" [  101].
  • Page 106 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 107: 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 2.10.2 Indoor unit To open the front panel 1 Hold the front panel by the panel tabs on both sides and open it. To close the front panel 1 Gently press the front panel at both sides and at the center until it clicks.
  • Page 108 Components To remove the front panel 1 Hold the front panel by the panel tabs on both sides and open it. a Panel tabs 2 Remove the front panel by sliding it to the left or the right and pulling it toward you.
  • Page 109 Components 3 Push down the 3 upper hooks marked with a symbol with 3 circles. a Upper hook b Symbol with 3 circles 4 We recommend opening the flap before removing the front grille. 5 Place both hands under the centre of the front grille, push it up and then toward you.
  • Page 110 Components Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.10 Plate work" [  101]. 1 Disconnect the power supply wiring from the power supply terminal X1M. 2 Pull the clip and remove the heat exchanger thermistor from its holder. 3 Remove the screws to disconnect the grounding wires from the heat exchanger.

  • Page 111: Reactor

    Components e Switch box 2 Route the connectors of the indoor unit fan motor, swing flap motor and swing raster motor (if equipped) inside the switch box and connect them to the indoor unit PCB. 3 Install and tighten the screw to secure the switch box. 4 Install the heat exchanger thermistor in its holder.
  • Page 112 Components Is the measured insulation resistance Action correct? Continue with the next step. Replace the reactor, see "2.11.2 Repair procedures" [  114]. 4 Measure the resistance of the reactor. Result: The measured resistance MUST be 105.3~128.7 mΩ. Is the resistance measurement correct? Action Return to the troubleshooting of the specific error and continue with the next step.
  • Page 113 Components a L803 b L804 c Measuring point d Measuring point e Measuring point Is the resistance measurement correct? Action Proceed with the next step. Replace the reactor, see "2.11.2 Repair procedures" [  114]. 4 Measure the inductance of the reactor using an LCR meter. Result: The inductance MUST be as follows: Measuring points Resistance...

  • Page 114: Repair Procedures

    Components 2.11.2 Repair procedures For class 20~42 units See procedures below. For class 50~71 units As the reactors are part of the main PCB, replace the complete main PCB. See "Repair procedures" [  81]. To remove the reactor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.

  • Page 115: Swing Flap Motor

    Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. 2.12 Swing flap motor 2.12.1 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.
  • Page 116 Components a Cover b Screw c Swing flap motor 2 Disconnect the connector from the swing flap motor. 3 Remove the screw from the swing flap motor. 4 Remove the swing flap motor from the swing flap. 5 To install the swing flap motor, see "2.12.2 Repair procedures" [  115].

  • Page 117: Thermistors

    Components 2.13 Thermistors 2.13.1 Refrigerant side thermistors Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a mechanical check of the specific thermistor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "2.10 Plate work" [...
  • Page 118 Components Name Symbol Location Connector Inter- Referen (PCB) (pins) mediate connector (table) (pins) Discharge Main (O/U) S90:5‑6 pipe thermistor Indoor unit Display PCB S26:1‑2 S27:1‑2 (on air (room) on main display PCB) thermistor PCB (I/U) Heat Main (I/U) S32:1‑2 exchanger thermistor 4 Determine the thermistor resistance that matches the measured temperature.
  • Page 119 Components T °C kΩ T °C kΩ T °C kΩ T °C kΩ –9 106.03 23.91 6.91 –8 100.41 22.85 6.65 –7 95.14 21.85 6.41 –6 90.17 20.90 6.65 –5 85.49 20.00 6.41 –4 81.08 19.14 6.18 –3 76.93 18.32 5.95 –2 73.01...
  • Page 120 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: 21.86 kΩ, ▪...
  • Page 121 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 "5.2 Wiring diagram" [  142]. Replace the specific thermistor, see "Repair procedures" [  121].
  • Page 122 Components a Tie strap b Insulation c Thermistor wire d Clip e Thermistor f 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. INFORMATION Some of the thermistors are wired to the same connector.
  • Page 123 Components To install the thermistor Indoor unit air (room) thermistor As the indoor unit air (room) thermistor is located on the display PCB, install the display PCB as described in the steps below: 1 Install the display PCB in the correct location on the unit. 2 Connect the connector to the display PCB.

  • Page 124: Other Thermistors

    Components 4 Route the thermistor harness towards the appropriate PCB. 5 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" [  142].
  • Page 125 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 126 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" [  37].

  • Page 127: 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 "2.10 Plate work" [  101].

  • Page 128: 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" [  128]. Adjust the power supply to the unit, see "3.1.2 Repair procedures" [  128]. 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 129: 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, fuse, …). Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
  • Page 130 Third party components To check if the refrigerant circuit is clogged Prerequisite: Visually check if the refrigerant liquid/gas pipes between the indoor and outdoor unit are NOT squeezed or bended into too short radius. Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
  • Page 131 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 132 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 133: 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 134 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 replace the clogged/leaking part of the refrigerant circuit 1 See the correct procedure for the component that needs to be repaired. See also "Repair information" [...
  • Page 135 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 136: 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 "2.10 Plate work" [  101].
  • Page 137 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 object(s) near the indoor unit that may block the airflow.

  • Page 138: 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 139: To Clean The Air Filters

    Maintenance CAUTION Rinse out the cleaning agent until there is NO cleaning agent left. Otherwise, the corrosion of heat exchanger and drain pan may occur. Pay attention to the cleaning agent that may also corrode other materials of the indoor unit (Aluminium, copper, plastic, ABS, …).
  • Page 140 Maintenance Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C Service manual + RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C Split Sensira R32 ESIE18-12E –...

  • Page 141: 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 142: Wiring Diagram

    Technical data 5.2 Wiring diagram 5.2.1 Wiring diagram: Indoor unit The correct wiring diagram is delivered with the unit. FTXF20~35A + FTXF20+25B + FTXF20~42C + ATXF20~35A + ATXF20~42C (1) Wiring diagram English Translation Wiring diagram Wiring diagram Indoor Indoor Outdoor Outdoor Transmission circuit Transmission circuit...
  • Page 143 Technical data (3) Legend Buzzer Frame ground Fuse Harness IPM* Intelligent power module LED 1, LED 2 Light‑emitting diode Fan motor Swing flap motor Magnetic relay PCB1, PCB2, PCB3 Printed circuit board Room thermistor Suction pipe thermistor S6-S602 Connector Operation switch Varistor Terminal strip Ferrite core...
  • Page 144 Technical data NOTES: BLK : Black RED : Red BLU : Blue WHT : White GRN : Green YLW : Yellow ORG : Orange Caution When the main power is turned off and then back on again, operation will resume automatically.

  • Page 145: 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. RXF20~35A + RXF20+25B + RXF20~42C + ARXF20~35A + ARXF20~42C (1) Wiring diagram English Translation Wiring diagram...
  • Page 146 Technical data Thermistor (air) Thermistor (heat exchanger) Thermistor (discharge) Surge arrestor S1PH High pressure switch S20-S90 Connector V2, V3 Varistor Terminal strip Reversing solenoid valve coil PTC1 Thermistor Electronic expansion valve Noise filter (ferrite core) Noise filter RXF50A (1) Wiring diagram English Translation Wiring diagram...
  • Page 147 Technical data ORG : Orange BLU : Blue For the power requirements, refer to the nameplate. (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...
  • Page 148 Technical data English Translation Discharge Discharge (2) Notes English Translation Connection Main terminal Field supply Protective earth Earth Field wire NOTES: GRY : Grey BLK : Black WHT : White BRN : Brown RED : Red GRN : Green YLW : Yellow ORG : Orange BLU : Blue For the power requirements, refer to the nameplate.
  • Page 149 Technical data Switching power supply Overload protector R1T, R2T, R3T Thermistor S1PH, S2PH High pressure switch S2 -S90 Connector Surge arrestor V1 , V2, V3 Varistor X11A, X14A Connector Terminal strip Electronic expansion valve coil Reversing solenoid valve coil Ferrite core Noise filter RXF71A + RXF50~60B + ARXF50~71A (1) Wiring diagram...
  • Page 150 Technical data RED : Red WHT : White YLW : Yellow For the power requirements, refer to the nameplate. (3) Legend Capacitor Diode Diode bridge E1, E2, HL1, HN1, S, U, V, W Connector FU1, FU2, FU3 Fuse IPM* Intelligent power module Live Compressor motor Fan motor...

  • Page 151: Piping Diagram

    Technical data 5.3 Piping diagram 5.3.1 Piping diagram: Indoor unit FTXF20~35A 6.4CuT 6.4CuT 9.5CuT 9.5CuT a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø9.5 mm flare connection) c Crossflow fan d Heat exchanger M1F Fan motor R2T Thermistor (heat exchanger) Heating Cooling INFORMATION...
  • Page 152 Technical data ATXF20~35A + ATXF20~35C + FTXF20+25B + FTXF20~35C 6.4CuT 6.4CuT 9.5CuT 9.5CuT a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø9.5 mm flare connection) c Crossflow fan d Heat exchanger M1F Fan motor R2T Thermistor (heat exchanger) Heating Cooling INFORMATION...
  • Page 153 Technical data FTXF42C + ATXF42C 6.4CuT 6.4CuT 9.5CuT 9.5CuT a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø9.5 mm flare connection) c Crossflow fan d Heat exchanger M1F Fan motor R2T Thermistor (heat exchanger) Heating Cooling INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit.
  • Page 154 Technical data FTXF50~71A + ATXF50~71A 6.4CuT 6.4CuT 12.7CuT 12.7CuT a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø12.7 mm flare connection) c Crossflow fan d Heat exchanger e Distributor M1F Fan motor R2T Thermistor (heat exchanger) Heating Cooling INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit.

  • Page 155: Piping Diagram: Outdoor Unit

    Technical data 5.3.2 Piping diagram: Outdoor unit RXF20+25A + RXF20+25B + RXF20~35C + ARXF20+25A + ARXF20~35C S1PH 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...
  • Page 156 Technical data RXF35A + RXF42C + ARXF35A + ARXF42C 7.0CuT 9.5CuT 7.0CuT 4.8CuT 6.4CuT 6.4CuT 4.8CuT 9.5CuT (6.4CuT) S1PH 9.5CuT 9.5CuT 9.5CuT (9.5CuT) 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...
  • Page 157 Technical data RXF50A 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 R1T Thermistor (outdoor air)
  • Page 158 Technical data ARXF50A + RXF50B 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 j Heat exchanger j Accumulator M1C Compressor M1F Fan...
  • Page 159 Technical data RXF60A S2PH 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 160 Technical data RXF71A + RXF60B + ARXF60~71A ·7.0· CuT ·7.0· CuT ·4.0· CuT ·7.0· CuT ·7.0· CuT ·6.4· CuT ·6.4· CuT ·4.0· CuT ·7.0· CuT ·7.0· CuT ·4.0· CuT ·12.7· CuT ·12.7· CuT ·12.7· CuT ·6.4· CuT ·6.4· CuT S1PH ·9.5·...

  • Page 161: Component Overview

    Technical data 5.4 Component overview 5.4.1 Component overview: Indoor unit a Heat exchanger b Heat exchanger thermistor R2T c Fan motor d Swing flap e Swing flap motor f Room thermistor R1T PCB g Switch box h Indoor unit PCB FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C Service manual + RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C...

  • Page 162: Component Overview: Outdoor Unit

    Technical data 5.4.2 Component overview: Outdoor unit a Air thermistor R1T j Service PCB b Heat exchanger k High pressure switch (NOT for RXF50A) c Expansion valve l Discharge pipe thermistor R3T d Heat exchanger thermistor R2T m Muffler e Liquid receiver n Accumulator f Stop valve with service port (gas) o Compressor...

  • Page 163: Field Information Report

    Technical data 5.5 Field information report See next page. FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C Service manual + RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C Split Sensira R32 ESIE18-12E – 2021.02...
  • Page 164 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 165 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 166: 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 167: Field Settings

    Technical data 5.7 Field settings 5.7.1 Field settings: Indoor unit To control the indoor unit fan during thermostat off in cooling INFORMATION As this unit has no remote controller installed, order the remote controller ARC480A1 separately to perform this procedure. 1 Press the centre of simultaneously.

  • Page 168: Field Settings: Outdoor Unit

    Technical data 5.7.2 Field settings: Outdoor unit To adapt the facility settings INFORMATION These settings are only to be used for facilities such as equipment or computer rooms and never in a residence or office with people. 1 Cut the jumper J6 on the circuit board using nippers or a similar tool to expand the operation range of the outdoor unit down to –15°C.
  • Page 172 ESIE18-12E 2021.02 Verantwortung für Energie und Umwelt...

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