Page 1 Service manual R32 Optimized Heating 4 Split RXTA30B2V1B FTXTM30R2V1B RXTM30R2V1B FTXTM40R2V1B RXTM40R2V1B RXTP25R2V1B FTXTP25M5V1B RXTP35R2V1B FTXTP35M5V1B ARXTP25R2V1B ATXTP25M5V1B ARXTP35R2V1B ATXTP35M5V1B FTXTA30B2V1BW FTXTA30B2V1BB...
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 ESIE21-12 Document release August 2021 ESIE21-12A See below February 2022 The following updates have been applied to the Service Manual: • Compressor: To perform an electrical check of the compressor updated for safety reasons. RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B...
Page 4: Table Of Contents
Table of contents Table of contents 1 Safety precautions Meaning of warnings and symbols..........................Dangers ................................... Warnings ..................................Cautions ..................................14 Notices .................................... 14 2 General operation 3 Troubleshooting To display the error code on the user interface ......................16 To reset the error code via remote controller .......................
Page 5 Table of contents 4-way valve..................................50 4.1.1 Checking procedures ............................50 4.1.2 Repair procedures ............................53 Compressor ..................................57 4.2.1 Checking procedures ............................57 4.2.2 Repair procedures ............................62 Compressor thermal protector............................68 4.3.1 Checking procedures ............................68 4.3.2 Repair procedures ............................69 Expansion valve................................
Page 6 Table of contents 5 Third party components Electrical circuit................................209 5.1.1 Checking procedures ............................209 5.1.2 Repair procedures ............................210 Refrigerant circuit ................................211 5.2.1 Checking procedures ............................211 5.2.2 Repair procedures ............................216 External factors ................................220 5.3.1 Checking procedures ............................220 6 Maintenance To clean the outdoor unit heat exchanger........................
Page 7: Safety Precautions
Safety precautions 1 Safety precautions The precautions described in this document cover very important topics, follow them carefully. All activities described in the service manual must be performed by an authorized person. If you are NOT sure how to install, operate or service the unit, contact your dealer. In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods, …...
Page 8: Dangers
Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY use accessories, optional equipment and spare parts made or approved by Daikin. WARNING Do NOT apply any permanent inductive or capacitance loads to the circuit without ensuring that this will NOT exceed the permissible voltage and current permitted for the equipment in use.
Page 9 WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). WARNING Make sure the work site environment is clean and safe to work in. Beware of spilled fluids, like water, oil or other substances.
Page 10 Safety precautions WARNING Make sure the total refrigerant charge is in accordance with the room size in which the unit is installed: please consult the detailed instructions on charging and allowed room sizes in the installation manual. WARNING ▪ NEVER mix different refrigerants or allow air to enter the refrigerant system. ▪...
Page 11 Safety precautions WARNING ▪ In order to prevent oxygen deficiency and R32 combustion, keep the room well- ventilated for a healthy work environment. Do NOT work in a confined space. If a refrigerant leak is detected in a confined room or an inadequately ventilated location, do NOT start the work until the area has been ventilated appropriately.
Page 12 Safety precautions WARNING ▪ The area MUST be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres. ▪ Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e.
Page 13 Safety precautions WARNING Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire. WARNING Prior to start working on systems containing flammable refrigerant, safety checks are necessary to ensure that the risk of ignition is minimised.
Page 14: Cautions
Safety precautions 1.4 Cautions CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system. CAUTION To avoid injury, do NOT touch the air inlet or aluminium fins of the unit. CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪...
Page 15: General Operation
General operation 2 General operation The Split is typically used for cooling or heating in residential applications. The medium which is used to transfer the heat from inside to outside or vice versa, is refrigerant R32. a Compressor b Indoor heat exchanger c Expansion valve d Outdoor heat exchanger e 4‑way valve...
Page 16: Troubleshooting
Troubleshooting 3 Troubleshooting 3.1 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 17: To Perform A Test Run In Winter Season
Troubleshooting INFORMATION ▪ Even if the unit is turned OFF, it consumes electricity. ▪ When the power turns back on after a power break, the previously selected mode will be resumed. 3.4.1 To perform a test run in winter season For FTXTP-M and ATXTP-M units When operating the air conditioner in Cooling mode in winter, set it to test run operation using the following method.
Page 18: A5-00 - Outdoor Unit: High Pressure Peak Cut / Freeze Protection Problem
Troubleshooting 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,… between the outdoor unit and the indoor unit. See "5.1 Electrical circuit" [ 209].
Page 19: A6-00 - Indoor Unit Fan Motor Abnormality
Troubleshooting Possible cause: Faulty indoor unit heat exchanger thermistor. 5 Perform a check of the indoor unit main PCB. See "4.10 Indoor unit main PCB" [ 97]. Possible cause: Faulty indoor unit main PCB. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.
Page 20: C4-00 - Heat Exchanger Temperature Sensor Problem
Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.5.5 C4-00 – Heat exchanger temperature sensor problem Trigger Effect Reset Refrigerant liquid Unit will stop operating. Power reset. thermistor detects an open or short circuit during compressor operation.
Page 21: Humidity Sensor Abnormality
Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.5.7 CC-00 – Humidity sensor abnormality Trigger Effect Reset ▪ Disconnected sensor Unit will stop operating. Manual reset via user interface. ▪...
Page 22: E1-00 - Outdoor Unit: Pcb Defect
Troubleshooting 3.5.9 E1-00 – Outdoor unit: PCB defect Trigger Effect Reset Main PCB detects that Unit will stop operating. Manual reset via user EEPROM is abnormal. interface. Power reset. 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.
Page 23: E3-00 - Outdoor Unit: Actuation Of High Pressure Switch
Troubleshooting 3.5.10 E3-00 – Outdoor unit: Actuation of high pressure switch Trigger Effect Reset High pressure switch Unit will stop operating. Manual reset via user opens due to measured interface. pressure above high pressure switch operating point. High pressure control (measured pressure just below high pressure switch operating point)
Page 24: E5-00 - Outdoor Unit: Overheat Of Inverter Compressor Motor
Troubleshooting 3.5.11 E5-00 – Outdoor unit: Overheat of inverter compressor motor Trigger Effect Reset Compressor overload is Unit will NOT stop Automatic reset if the unit detected. operating. runs without warning for 60 seconds. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check that all stop valves of the refrigerant circuit are open.
Page 25: E6-00 - Outdoor Unit: Compressor Startup Defect
Troubleshooting 3.5.12 E6-00 – Outdoor unit: Compressor startup defect Trigger Effect Reset The motor rotor does Unit will NOT stop Automatic reset after a NOT rotate when the operating. continuous run for compressor is energized. 10 minutes. Unit will stop operating Manual reset via user interface.
Page 26: E7-00 - Outdoor Unit: Malfunction Of Outdoor Unit Fan Motor
Troubleshooting 3.5.13 E7-00 – Outdoor unit: Malfunction of outdoor unit fan motor Trigger Effect Reset Fan does NOT start Unit will stop operating. Manual reset via user 15~30 seconds after ON interface. signal. It can occur that the error code is triggered when the fan motor is running caused by a faulty rotating sensor signal.
Page 27: Outdoor Unit: Cool/Heat Switchover Problem
Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%), ▪ Power drop, ▪ Short circuit. INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk.
Page 28: F3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Temperature
Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. 3.5.16 F3-00 – Outdoor unit: Malfunction of discharge pipe temperature Trigger Effect Reset Discharge pipe thermistor Unit will NOT stop Automatic reset when detects a too high operating.
Page 29: F6-00 - Outdoor Unit: Abnormal High Pressure In Cooling
Troubleshooting 3.5.17 F6-00 – Outdoor unit: Abnormal high pressure in cooling Trigger Effect Reset Outdoor heat exchanger Unit will NOT stop Automatic reset when thermistor measures a operating. temperature drops. too high temperature. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Clean the outdoor heat exchanger.
Page 30: H0-00 - Outdoor Unit: Voltage/Current Sensor Problem
Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Check that all stop valves of the refrigerant circuit are open. See "5.2 Refrigerant circuit" [ 211]. Possible cause: Closed stop valve in the refrigerant circuit. 2 Check if the refrigerant circuit is correctly charged.
Page 31: H3-00 - Outdoor Unit: Malfunction Of High Pressure Switch
Troubleshooting 3 Wait until the rectifier voltage is below 10 V DC. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding. 4 Check that the thermal interface grease is applied properly on the (PCB or refrigerant piping) contact surface of the heat sink.
Page 32: H6-00 - Outdoor Unit: Malfunction Of Position Detection Sensor
Troubleshooting 3.5.21 H6-00 – Outdoor unit: Malfunction of position detection sensor Trigger Effect Reset Compressor fails to start Unit will NOT stop Automatic reset after a within 15 seconds after operating. continuous operation of the compressor run 10 minutes. command signal is sent. If the error re-occurs Manual reset via user within 8 minutes: unit will...
Page 33: H8-00 - Outdoor Unit: Malfunction Of Compressor Input System
Troubleshooting 3.5.22 H8-00 – Outdoor unit: Malfunction of compressor input system Trigger Effect Reset DC voltage or current Unit will NOT stop Automatic reset when sensor abnormality based operating. compressor runs normally on the compressor for 60 minutes. running frequency and If the error re-occurs too Manual reset via user the input current.
Page 34: J3-00 - Outdoor Unit: Malfunction Of Discharge Pipe Thermistor
Troubleshooting 3.5.24 J3-00 – Outdoor unit: Malfunction of discharge pipe thermistor Trigger Effect Reset Discharge pipe thermistor Unit will stop operating. Manual reset via user input is out of range. interface. To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform check discharge...
Page 35: L4-00 - Outdoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise
Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform a check of the main PCB. See "4.14 Main PCB" [ 126]. Possible cause: Faulty main PCB. 2 Perform a check of the outdoor unit fan motor. See "4.15 ...
Page 36: L5-00 - Outdoor Unit: Inverter Instantaneous Overcurrent
Troubleshooting Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 4 Wait until the rectifier voltage is below 10 V DC. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 37: P4-00 - Outdoor Unit: Malfunction Of Radiating Fin Temperature Sensor
Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%), ▪ Power drop, ▪ Short circuit. Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 8 Wait until the rectifier voltage is below 10 V DC.
Page 38: U2-00 - Outdoor Unit: Defect Of Power Supply Voltage
Troubleshooting To solve the error code INFORMATION It is recommended to perform the checks in the listed order. 1 Perform check refrigerant side thermistors. "4.22 Thermistors" [ 195]. Possible cause: Faulty refrigerant side thermistor(s). 2 Check that all stop valves of the refrigerant circuit are open. See "5.2 Refrigerant circuit" [ 211].
Page 39: U4-00 - Indoor/Outdoor Unit Communication Problem
Troubleshooting Possible cause: ▪ Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%), ▪ Power drop, ▪ Short circuit. 2 Perform a check of the compressor. See "4.2 Compressor" [ 57]. Possible cause: Faulty compressor or miswiring of the compressor power supply cable.
Page 40: Indoor Unit, Outdoor Unit Mismatching Problem
Troubleshooting Possible cause: Faulty main PCB. 4 Perform a check of the outdoor unit fan motor. See "4.15 Outdoor unit fan motor" [ 135]. Possible cause: Faulty outdoor unit fan motor. 5 Perform a check of the indoor unit main PCB. See "4.10 ...
Page 41 Troubleshooting INFORMATION If all procedures listed above have been performed and the problem is still present, contact the helpdesk. RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B R32 Optimized Heating 4 Split ESIE21-12A – 2022.02...
Page 42: Symptom Based Troubleshooting
Troubleshooting 3.6 Symptom based troubleshooting 3.6.1 Operation does not start Check Detail When the operation lamp is off, there is ▪ Is the power supply breaker ON? a power failure. ▪ Do other electrical appliances work? Check the power supply. ▪...
Page 43: Operation Starts But The Unit Does Not Cool/Heat
Troubleshooting Check Detail Check the outdoor temperature. ▪ Heating operation cannot be used when the outdoor temperature is 18°C WB or higher. ▪ Cooling operation cannot be used when the outdoor temperature is below −10°C DB. When the operation lamp blinks, there "3.5 Error based may be an error code, activating the troubleshooting" [...
Page 44: 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 45: Abnormal High Pressure
Troubleshooting 3.6.5 Abnormal high pressure In cooling mode Check item Detail Does the outdoor unit fan run Visual inspection normally? Is the outdoor unit heat exchanger Visual inspection clogged? Is there clogging before or after the ▪ Check if there is a temperature expansion valve (capillary)? difference before and after expansion valve (capillary).
Page 46: Abnormal Low Pressure
Troubleshooting Check item Detail Is the refrigerant overcharged? Conduct refrigerant collection and vacuum drying, and then add proper amount refrigerant. 3.6.6 Abnormal low pressure Abnormally low pressure level is mostly caused by the evaporator side. The following contents are provided based on field checking of service engineer. Further, the number is listed in the order of degree of influence.
Page 47: Indoor Fan Starts Operating But The Compressor Does Not Operate
Troubleshooting Check item Detail Is the outdoor unit installed under such Visual inspection conditions that short circuit easily occurs? Is there a shortage of refrigerant? Conduct refrigerant collection and vacuum drying, and then add proper amount refrigerant. 3.6.7 Indoor fan starts operating but the compressor does not operate Check Detail Check the power supply.
Page 48: Operation Starts And The Unit Stops Immediately
Troubleshooting 3.6.8 Operation starts and the unit stops immediately Check Detail Check the power supply. ▪ Is the capacity of the safety breaker as specified? ▪ If the earth leakage breaker is too sensitive, then increase the set value of the earth leakage current of the breaker or replace the breaker.
Page 49: 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 50: Components
Components 4 Components CAUTION When replacing a component ALWAYS make sure the correct spare part for your unit is installed. 4.1 4-way valve 4.1.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a mechanical check of the 4-way valve Prerequisite: Stop the unit operation via the user interface.
Page 51 Components 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. See the databook on Business Portal for the temperature range of the operation modes. 1 Connect the 4‑way valve connector to the appropriate PCB.
Page 52 Components To perform a position check of the 4-way valve 1 First perform an electrical check of the 4‑way valve, see "4.1.1 Checking procedures" [ 50]. 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 53: 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. Replace the body of the 4‑way valve, "4.1.2 Repair procedures" [ 53]. When outdoor temperature does not allow the unit to run in cooling or heating mode INFORMATION Follow this procedure when the outdoor temperature is outside the temperature...
Page 54 Components Prerequisite: If needed, remove any parts to create more space for the removal of the 4‑way valve coil. 1 Remove the screw and remove the 4‑way valve coil from the 4‑way valve body. a Screw b 4‑way valve coil c 4‑way valve body 2 Cut all tie straps that fix the 4‑way valve coil harness.
Page 55 Components a 4‑way valve pipe b 4‑way valve c Putty 5 Stop the nitrogen supply when the piping has cooled down. 6 Remove the 4‑way valve. INFORMATION It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to remove the remaining component pipe end(s) from the refrigerant pipes by heating the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
Page 56 Components a 4‑way valve pipe b 4‑way valve c Putty CAUTION Overheating the valve will damage or destroy it. 6 After soldering is done, stop the nitrogen supply after the component has cooled‑down. 7 Install the putty (if available) and the insulation (if available) in their original location.
Page 57: Compressor
Components 2 Install and tighten the screw to fix the 4‑way valve coil. 3 Route the 4‑way valve coil harness towards the appropriate PCB. 4 Connect the 4-way valve 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 58 Components A mechanical lock is present on the Action compressor? Replace the compressor, see "4.2.2 Repair procedures" [ 62]. Perform an mechanical check of the compressor, see "4.2.1 Checking procedures" [ 57]. To perform a mechanical check of the compressor Prerequisite: First perform an auditive check of the compressor, see "4.2.1 Checking procedures" [ 57].
Page 59 Components Compressor dampers are in a good Action condition? Perform an electrical check of the compressor, see "4.2.1 Checking procedures" [ 57]. Replace the compressor and/or damaged dampers, see "4.2.2 Repair procedures" [ 62]. To perform an electrical check of the compressor 1 First perform a mechanical check of the compressor, see "4.2.1 ...
Page 60 Components U Wire terminal U V Wire terminal V W Wire terminal W CAUTION Before measuring the compressor motor windings resistance, measure the resistance of the multimeter probes by holding the probes against each other. If the measured resistance is NOT 0 Ώ, this value MUST be subtracted from the measured winding resistance.
Page 61 Components Inverter voltage measurements are Action correct? Continue with the next step. Perform a check of the appropriate PCB, see "4 Components" [ 50]. 12 While compressor is operating, measure the current in each phase U, V and W. ALWAYS measure at the PCB side. Result: All measurements MUST be the same.
Page 62: Repair Procedures
Components INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation. U Wire terminal U V Wire terminal V W Wire terminal W 4 Set the Megger voltage to 500 V DC or 1000 V DC. 5 Measure the insulation resistance between the following terminals.
Page 63 Components a String b Body jacket (outer) c Top insulation d Secondary (inner) body jacket 2 Open the body jacket. 3 Remove the top insulation from the compressor. 4 Open the secondary body jacket from the compressor. 5 Remove the body jackets from the compressor. 6 To install the compressor insulation, see "4.2.2 Repair procedures" [...
Page 64 Components Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see "5.2.2 Repair procedures" [ 216]. 1 If needed, remove any parts to create more space for the removal of the compressor. DANGER: RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure the rectifier voltage is below 10 V DC before proceeding.
Page 65 Components U Wire terminal U V Wire terminal V W Wire terminal W 4 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa. 5 Wrap a wet rag around the components near the compressor pipes. Heat the brazing points of the compressor pipes using an oxygen acetylene torch and remove the refrigerant pipes from the compressor pipes using pliers.
Page 66 Components INFORMATION The compressor dampers may look different. 9 Remove the bushings and keep them for re-use. 10 Install plugs or caps on the open pipe ends of the refrigerant piping to avoid dirt or impurities from entering the piping. 11 To install the compressor, see "4.2.2 Repair procedures" [...
Page 67 Components a Compressor pipe CAUTION Overheating the compressor pipes (and the oil inside the compressor pipes) will damage or destroy the compressor. 8 After soldering is done, stop the nitrogen supply after the component has cooled‑down. 9 Install the cover of the compressor wire terminals. a Compressor wire terminals cover 10 Install the compressor insulation, see "4.2.2 Repair...
Page 68: Compressor Thermal Protector
Components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.3 Compressor thermal protector 4.3.1 Checking procedures To perform a mechanical check of the compressor thermal protector Prerequisite: Stop the unit operation via the user interface.
Page 69: Repair Procedures
Components a Compressor thermal protector b Faston connector c Bracket 3 If in doubt, measure the temperature of the compressor thermal protection. Result: The temperature MUST be below 85°C. 4 Disconnect the Faston connectors from the compressor thermal protection. INFORMATION Make sure that the wiring between the compressor thermal protector and the connector on the PCB is properly connected and NOT damaged (check continuity), "7.2 Wiring...
Page 70 Components Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. Prerequisite: Remove the compressor insulation. 1 Remove the cover of the compressor wire terminals. a Compressor wire terminals cover 2 Remove the compressor thermal protector with bracket from the compressor housing.
Page 71 Components a Compressor thermal protector b Compressor thermal protector bracket 5 To install compressor thermal protector, "4.2.2 Repair procedures" [ 62]. To install the compressor thermal protector 1 Install the compressor thermal protector on the compressor thermal protector bracket. a Compressor thermal protector b Compressor thermal protector bracket 2 Connect the Faston connectors to the compressor thermal protector.
Page 72: Expansion Valve
Components a Compressor wire terminals cover 5 Install the compressor insulation. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.4 Expansion valve 4.4.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order.
Page 73 Components 2 Remove the expansion valve coil from the expansion valve body, see "4.4.2 Repair procedures" [ 76]. 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. Listen to check if the valve is closing/opening and manually close the valve when check is done.
Page 74 Components 1 2 3 4 5 a Connector ▪ Connector pin 1‑6, ▪ Connector pin 2‑6, ▪ Connector pin 3‑6, ▪ Connector pin 4‑6. 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.
Page 75 Components 3 With the unit operating, connect the service monitoring tool to the unit. 4 When the expansion valve is closed according to the service monitoring tool, check the inlet and outlet of the valve with a contact thermometer or use an expansion valve stethoscope to see if refrigerant flows through the expansion valve.
Page 76: Repair Procedures
Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. 4.4.2 Repair procedures To remove the expansion 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 "4.17 Plate work" [...
Page 77 Components 2 Remove the putty. Keep for re-use. a Putty b Expansion valve body c Expansion valve pipe 3 Using a valve magnet, open the expansion valve. 4 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT exceed 0.02 MPa. 5 Wrap a wet rag around the components near the expansion valve pipes.
Page 78 Components 6 Wrap a wet rag around the expansion valve body and any other components near the expansion valve and solder the expansion valve pipes to the refrigerant pipes. CAUTION Overheating the valve will damage or destroy it. 7 After soldering is done, stop the nitrogen supply after the component has cooled‑down.
Page 79: Front Panel Motor
Components a Expansion valve coil b Metal bracket c Nipple d Notch e Expansion valve body 2 Route the expansion valve coil harness towards the appropriate PCB. 3 Connect the expansion valve coil connector to the appropriate PCB. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 80 Components 1 In the switch box, disconnect the front panel motor wiring harness from the indoor unit main PCB and from the switch box. a Connector on indoor unit main PCB b Connector on switch box 2 Measure the continuity of all wires of the wiring harness. Is the wiring harness OK? Action Continue with the next step.
Page 81: Repair Procedures
Components 4.5.2 Repair procedures To remove the front panel motor Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. 1 On the front grille (removed from the indoor unit), remove the 2 screws and remove the front panel motor and gears assembly from the front grille.
Page 82 Components 4 Install front grille and assemble the indoor unit, see "4.17 Plate work" [ 144]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To remove the front panel motor wiring harness Prerequisite: Stop the unit operation via the user interface.
Page 83: High Pressure Switch
Components 2 Route the wiring harness through the harness retainer (top of the switch box). 3 Connect the other end of the front panel motor wiring harness to the indoor unit main PCB. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 84: Repair Procedures
Components 5 Fill the refrigerant circuit with nitrogen until pressurized just above operating pressure of the high pressure switch. 6 Measure the resistance between the Faston connections of the high pressure switch. Result: The switch MUST be open. INFORMATION If the high pressure switch was triggered open, it will stay open until the refrigerant pressure drops below the reset pressure of the high pressure switch.
Page 85 Components a High pressure switch S1PH b Faston connector c High pressure switch pipe 5 Stop the nitrogen supply when the piping has cooled down. 6 Remove the high pressure switch. INFORMATION It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to remove the remaining component pipe end(s) from the refrigerant pipes by heating the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
Page 86: Humidity Sensor
Components a High pressure switch S1PH b Faston connector c High pressure switch pipe CAUTION Overheating the pressure switch will damage or destroy it. 5 After soldering is done, stop the nitrogen supply after the component has cooled‑down. 6 Connect the Faston connectors to the high pressure switch. 7 Perform a pressure test, see "5.2.1 Checking procedures" [...
Page 87: Repair Procedures
Components 3 Measure the power supply voltage between the pins 1‑4 on the humidity sensor connector CN. Result: The measured voltage MUST be 5 V DC. a Humidity sensor (PCB) Is the measured power supply voltage Action correct? Skip the next step.. Continue with the next step.
Page 88 Components 2 Carefully click the complete humidity sensor PCB assembly out of the indoor unit. a Humidity sensor PCB assembly 3 To install the humidity sensor PCB assembly, see "4.7.2 Repair procedures" [ 87]. To install the humidity sensor 1 Click the humidity sensor PCB assembly on the indoor unit. a Humidity sensor PCB assembly 2 Connect the harness to the humicity sensor PCB assembly.
Page 89: Indoor Unit Fan Motor
Components 5 To install the humidity sensor wiring harness, see "4.7.2 Repair procedures" [ 87]. To install the humidity sensor wiring harness 1 Connect the wiring harness connector to the indoor unit main PCB. WARNING When reconnecting a connector to the PCB, make sure to connect it on the correct location and do NOT apply force, as this may damage the connector or connector pins of the PCB.
Page 90: Repair Procedures
Components To perform an electrical check of the DC fan motor assembly FTXTA-B and FTXTM-R units Prerequisite: First perform a mechanical check of the DC fan motor assembly, see "4.8.1 Checking procedures" [ 89]. 1 Remove the cover from the switch box; see "4.17 Plate work" [ 144].
Page 91 Components Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. 1 Remove the switch box, see "4.17 Plate work" [ 144]. 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 92 Components A FTXTM40R units a Indoor unit fan motor cover A FTXTP-M and ATXTP-M units a Indoor unit fan motor cover 3 Remove the rubber from the indoor unit. 4 Remove the indoor unit fan motor from the indoor unit. 5 To install the indoor unit fan motor, see "4.8.2 Repair procedures" [...
Page 93 Components A FTXTA-B units a Indoor unit fan motor cover A FTXTM30R units a Indoor unit fan motor cover RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B R32 Optimized Heating 4 Split ESIE21-12A – 2022.02...
Page 94: Indoor Unit Heat Exchanger
Components A FTXTM40R units a Indoor unit fan motor cover A FTXTP-M and ATXTP-M units a Indoor unit fan motor cover 4 Install the switch box, see "4.17 Plate work" [ 144]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 95: Repair Procedures
Components Any leaks found? Action Heat exchanger is OK. Return to the troubleshooting of the specific error and continue with the next step. 4.9.2 Repair procedures To remove the indoor unit heat exchanger Prerequisite: First perform pump down operation. Close the refrigerant circuit stop valves when done.
Page 96 Components B FTXTM30R units C FTXTM40R units D FTXTP-M + ATXTP-M units a Screw b Streamer unit assembly c Indoor unit heat exchanger 10 Lift and remove the indoor unit heat exchanger from the unit. 11 To install the indoor unit heat exchanger, see "4.9.2 Repair procedures" [ 95].
Page 97: Indoor Unit Main Pcb
Components 10 Perform a pressure test on the piping of the indoor unit and vacuüm. Open the stop valves when done. 11 Add refrigerant refrigerant circuit, "5.2.2 Repair procedures" [ 216]. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 98 Components 3 Check the power supply to the indoor unit, see "5.1.1 Checking procedures" [ 209]. 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 "4.10.2 Repair procedures" [ 103].
Page 99 Components A Indoor unit FTXTA-B a Connector S300A b Connector S102 RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B R32 Optimized Heating 4 Split ESIE21-12A – 2022.02...
Page 100 Components A Indoor unit FTXTM-R a Connector S300A Is the measured voltage on the indoor Action unit main PCB correct? Return to "4.10.1 Checking procedures" [ 97] of the indoor unit main PCB and continue with the next procedure. Continue with the next step. 3 Measure the output voltage between the pins 1‑4 of the connector S102 on the indoor unit power PCB.
Page 101 Components a HAP LED INFORMATION Make sure the correct software is available on the PCB. If NOT, update using the updater tool. Does the HAP LED blink in regular Action intervals (1 second ON/1 second OFF)? Return to "4.10.1 Checking procedures" [ 97] of the indoor unit main PCB and continue with the next procedure.
Page 102 Components 1 Check that all wires are properly connected and that all connectors are fully plugged‑in. 2 Check that no connectors or wires are damaged. 3 Check that the wiring corresponds with the wiring diagram, see "7.2 Wiring diagram" [ 232]. INFORMATION Correct the wiring as needed.
Page 103: Repair Procedures
Components Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.10.2 Repair procedures To correct the wiring from the indoor unit power supply terminal to the indoor unit main PCB Prerequisite: Stop the unit operation via the user interface.
Page 104 Components A Indoor unit FTXTA-B a Indoor unit main PCB b PCB support RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B R32 Optimized Heating 4 Split ESIE21-12A – 2022.02...
Page 105 Components A Indoor unit FTXTM-R a Indoor unit main PCB A Indoor unit FTXTP-M and ATXTP-M a Indoor unit main PCB b PCB support 5 Remove the indoor unit main PCB from the indoor unit. 6 To install the indoor unit main PCB, see "4.10.2 Repair procedures" [ 103].
Page 106 Components A Indoor unit FTXTA-B a Indoor unit main PCB b PCB support RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B R32 Optimized Heating 4 Split ESIE21-12A – 2022.02...
Page 107 Components A Indoor unit FTXTM-R a Indoor unit main PCB A Indoor unit FTXTP-M and ATXTP-M a Indoor unit main PCB b PCB support 4 Connect all connectors to the indoor unit main PCB. INFORMATION Use the wiring diagram and connection diagram for correct installation of the connectors, see "7.2 Wiring diagram" [...
Page 108 Components a Fuse 2 To install a fuse on the indoor unit PCB, see "4.10.2 Repair procedures" [ 103]. To install a fuse on the indoor unit main PCB 1 Install the fuse on the correct location on the PCB. CAUTION Make sure the fuse is plugged‑in correctly (contact with the fuse holder).
Page 109: Indoor Unit Power Pcb
Components 4.11 Indoor unit power PCB 4.11.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order. To perform a power check of the indoor unit power PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 110 Components Is the measured voltage on the indoor Action unit power PCB correct? Return to "4.11.1 Checking procedures" [ 109] of the indoor unit power PCB and continue with the next procedure. Continue with the next step. 3 Check the power supply to the indoor unit, see "5.1.1 ...
Page 111 Components A Indoor unit FTXTM-R a Connector S102 Is the measured voltage on the indoor Action unit power PCB correct? Return to "4.11.1 Checking procedures" [ 109] of the indoor unit power PCB and continue with the next procedure. Replace the indoor unit power PCB, see "4.11.2 Repair procedures" [ 113].
Page 112 Components 3 Check that the wiring corresponds with the wiring diagram, see "7.2 Wiring diagram" [ 232]. INFORMATION Correct the wiring as needed. Is the problem solved? Action No further actions required. Return to "4.10.1 Checking procedures" [ 97] of the indoor unit power PCB and continue with the next procedure.
Page 113: Repair Procedures
Components Blown fuse on the indoor unit power Action PCB? Replace the blown fuse, see "4.11.2 Repair procedures" [ 113]. Return to "4.10.1 Checking procedures" [ 97] of the indoor unit power PCB and continue with the next procedure. Problem solved? After all checking procedures listed above have been performed: Is the problem solved? Action No further actions required.
Page 114 Components A Indoor unit FTXTA-B a Indoor unit power PCB RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B R32 Optimized Heating 4 Split ESIE21-12A – 2022.02...
Page 115 Components A Indoor unit FTXTM-R a Indoor unit power PCB 3 Remove the indoor unit power PCB from the indoor unit. 4 To install the indoor unit power PCB, see "4.11.2 Repair procedures" [ 113]. To install the indoor unit power PCB 1 Install the indoor unit power PCB in the correct location in the switch box.
Page 116 Components A Indoor unit FTXTM-R a Indoor unit power PCB 2 Connect all connectors to the indoor unit power PCB. INFORMATION Use the wiring diagram and connection diagram for correct installation of the connectors, see "7.2 Wiring diagram" [ 232]. 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 117 Components A Indoor unit FTXTA-B a Fuse F1U A Indoor unit FTXTM-R a Fuse F1U 2 To install a fuse on the indoor unit power PCB, see "4.11.2 Repair procedures" [ 113]. To install a fuse on the indoor unit power PCB 1 Install the fuse on the correct location on the PCB.
Page 118: Intelligent Eye Sensor
Components A Indoor unit FTXTA-B a Fuse F1U A Indoor unit FTXTM-R a Fuse F1U Is the problem solved? Action No further actions required. Return to "4.10.1 Checking procedures" [ 97] of the indoor unit power PCB and continue with the next procedure.
Page 119 Components a Control panel b Intelligent eye sensor connector CN Is the measured power supply voltage Action correct? Perform an electrical check of the intelligent eye sensor, see "4.12.1 Checking procedures" [ 118]. Continue with the next step. 5 Measure the output voltage between between the pins 1‑2 on the connector S602 on the indoor unit main PCB.
Page 120: Repair Procedures
Components 3 Wave your hand in front of the right side (when facing the indoor unit) of the intelligent eye sensor and measure the voltage between the following pins of the intelligent eye sensor connector S602. Result: The measured voltage MUST be: Connector pins Voltage 2‑3...
Page 121 Components a Control panel b Intelligent eye sensor PCB 2 Disconnect the connector from the intelligent eye sensor PCB. 3 Carefully click the complete intelligent eye sensor PCB out of the indoor unit. 4 To install intelligent sensor PCB, "4.12.2 Repair procedures" [ 120].
Page 122: Intelligent Thermal Sensor
Components 1 Disconnect the wiring harness from the intelligent eye sensor (PCB). 2 Disconnect the wiring harness connector from the indoor unit main PCB. 3 Cut all tie straps (if any) that fix the wiring harness. 4 Route the wiring harness out of the harness retainers and remove the intelligent eye sensor wiring harness.
Page 123: Repair Procedures
Components a Intelligent thermal sensor assembly 4 Measure the power supply voltage between the pins 1‑4 on the intelligent thermal sensor connector S800. Result: The measured voltage MUST be 4~6 V DC. Is the measured power supply voltage Action correct? Skip the next step. Continue with the next step.
Page 124 Components 1 Carefully click the complete intelligent thermal sensor assembly out of the indoor unit. a Intelligent thermal sensor assembly 2 Disconnect the wiring harness from the intelligent thermal sensor PCB. 3 Click the intelligent thermal sensor PCB out of the bracket. 4 To install intelligent...
Page 125 Components To remove the intelligent thermal sensor wiring harness Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. 1 Carefully click the complete intelligent thermal sensor assembly out of the indoor unit.
Page 126: Main Pcb
Components a Intelligent thermal sensor assembly 5 Fix the wiring harness using new tie straps (if needed). Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. 4.14 Main PCB 4.14.1 Checking procedures INFORMATION...
Page 127 Components a Black wire b White wire Is the measured voltage on the PCB Action correct? Return to "4.14.1 Checking procedures" [ 126] of the PCB and continue with the next procedure. Continue with the next step. 3 Check the power supply to the unit, see "5.1.1 Checking procedures" [ 209].
Page 128 Components INFORMATION Make sure the correct software is available on the PCB. If NOT, update using the updater tool. Does the HAP LED blink in regular Action intervals (1 second ON/1 second OFF)? Return to "4.14.1 Checking procedures" [ 126] of the main PCB and continue with the next procedure.
Page 129 Components Is the problem solved? Action Return to "4.14.1 Checking procedures" [ 126] of the PCB and continue with the next procedure. To check the fuse of the main PCB Prerequisite: First perform all earlier main PCB checks, see "4.14.1 Checking procedures" [ 126].
Page 130 Components INFORMATION When measuring on the front of the main PCB, make sure to locally remove the protective varnish with the test leads of the multi meter. Is the measured rectifier voltage Action correct? Perform a check of the power modules, "4.14.1 Checking procedures" [ 126].
Page 131 Components 0.51~0.52 V 4 If the diode module is NOT OK, replace the main PCB, see "4.14.2 Repair procedures" [ 132]. To perform a power module check Prerequisite: First check the rectifier voltage of the main PCB, see "4.14.1 Checking procedures" [ 126]. Prerequisite: Stop the unit operation via the user interface. 1 Turn OFF the respective circuit breaker.
Page 132: Repair Procedures
Components 0.501 V 0.501 V DC– 0.501 V DC– DC– 0.501 V DC– DC– 0.501 V DC– Are the test results OK? Action Power modules are OK. Return to "4.14.1 Checking procedures" [ 126] of the main PCB and continue with the next procedure. Replace the main PCB, see "4.14.2 Repair procedures" [ 132].
Page 133 Components 6 Remove the screw and remove the ground wiring from the switch box. 7 Remove the ferrite core (for ground wiring) from the switch box (unplug fixation plug). 8 Disconnect all other connectors from the main PCB. 9 Remove the screws from the main PCB. 10 Remove the main PCB from the unit.
Page 134 Components 6 Connect the power supply wiring to the main power supply terminal X1M. 7 Connect the red wire to the main power supply terminal X1M. 8 Fix the ferrite core(s) (for power supply wiring) to the switch box (fixation plug).
Page 135: Outdoor Unit Fan Motor
Components CAUTION Make sure the fuse is plugged‑in correctly (contact with the fuse holder). a Fuse Is the problem solved? Action No further actions required. Return to "4.14.1 Checking procedures" [ 126] of the PCB and continue with the next procedure. 4.15 Outdoor unit fan motor 4.15.1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order.
Page 136 Components To perform a mechanical check of the DC fan motor assembly Prerequisite: First perform a mechanical check of the propeller fan blade assembly, see "4.15.1 Checking procedures" [ 135]. 1 Visually check: ▪ For any burnt‑out part or wire. If found, replace the fan motor, see "4.15.2 Repair procedures" [ 138].
Page 137 Components 8 Disconnect the DC fan motor connector S70 and measure the resistance on the connector pins shown below. The measured resistance MUST be: Comm Resistance >1 MΩ >100 kΩ >100 Ω >100 kΩ INFORMATION The measured resistance values may deviate from the listed values due to instability during the measurements.
Page 138: Repair Procedures
Components Pulses are measured during fan blade Action propeller rotation? Perform a check of the main PCB, see "4.14.1 Checking procedures" [ 126]. Replace the DC fan motor, see "4.15.2 Repair procedures" [ 138]. 4.15.2 Repair procedures To remove the propeller fan blade assembly Prerequisite: Stop the unit operation via the user interface.
Page 139 Components a Opening in partition plate b DC fan motor harness c Switch box d Harness retainer e Screw f DC man motor assy g Fan motor bracket 4 Detach the DC fan motor harness from the switch box. 5 Guide the DC fan motor harness though the opening in the partition plate. 6 Slightly bend the harness retainers (at the back of the fan motor bracket) to detach the DC fan motor harness.
Page 140 Components a Opening in partition plate b DC fan motor harness c Switch box d Harness retainer e Screw f DC man motor assy g Fan motor bracket 3 Route the DC fan motor harness through the harness retainers and bend the harness retainers to attach the DC fan motor harness.
Page 141: Outdoor Unit Heat Exchanger
Components a Nut b Propeller fan blade assembly Is the problem solved? Action No further actions required. Return to "4.15.1 Checking procedures" [ 135] of the outdoor unit fan motor and continue with the next procedure. 4.16 Outdoor unit heat exchanger 4.16.1 Checking procedures To perform a mechanical check of the outdoor unit heat exchanger Prerequisite: Stop the unit operation via the user interface.
Page 142: Repair Procedures
Components 4.16.2 Repair procedures To remove the outdoor unit heat exchanger Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see "5.2.2 Repair procedures" [ 216].
Page 143 Components a Screw (support plate) b Support plate c Screw (fan motor mounting bracket) d Fan motor mounting bracket e Heat exchanger 8 Stop the nitrogen supply when the piping has cooled down. INFORMATION It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to remove the remaining component pipe end(s) from the refrigerant pipes by heating the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
Page 144: Plate Work
Components 7 After soldering is done, stop the nitrogen supply after the component has cooled‑down. 8 Install the support plate. Install and tighten the 2 screws to fix the support plate. a Heat exchanger thermistor b Outdoor air thermistor c Guard net d Screw e Support plate f Heat exchanger pipe...
Page 145 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. 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 146 Components a Screw b Front plate 2 Remove the front plate. To remove the side plate Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the refrigerant connection cover, top plate and front plate, "4.17 Plate work" [ 144].
Page 147 Components 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 "4.17 Plate work" [ 144].
Page 148 Components a Electrical power supply wiring b Wire terminals c Screws d Wire clamp e Screws f Right side plate assembly 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 149 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 "4.17 Plate work" [ 144]. 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 150 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 151: Indoor Unit
Components a Cable tie b Switch box 7 Install the insulation on the upper side of the switch box. a Insulation b Main PCB 4.17.2 Indoor unit To open the front panel FTXTA-B units 1 Hold the front panel on both sides and open it. Open the front panel using the user interface.
Page 152 Components 3 Hold on the user interface for at least 2 seconds. Result: The front panel will open. 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.
Page 153 Components FTXTA-B units INFORMATION Remove the front panel only in case it MUST be replaced. 1 Open the front panel, see "4.17 Plate work" [ 144]. 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.
Page 154 Components a Front panel shaft a Front panel shaft To remove the front grille FTXTA-B units CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system. 1 Open the front panel, see "4.17 Plate work" [ 144].
Page 155 Components a Hook Prerequisite: If working space is limited. 7 Insert a flat screwdriver next to the hooks. 8 Pull the front grille up using the flat screwdriver and push towards the mounting plate. a Hook b Flat screwdriver FTXTM-R units CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system.
Page 156 Components 5 We recommend opening the flap before removing the front grille. 6 Place both hands under the centre of the front grille, push it up and then toward you. FTXTP-M and ATXTP-M units CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system.
Page 157 Components a Service cover screw b Service cover NOTICE When closing the service cover, make sure that the tightening torque does NOT exceed 1.4 (±0.2) N•m. TO REMOVE THE ELECTRICAL WIRING BOX COVER Prerequisite: Remove the front grille. 1 Remove 1 screw from the electrical wiring box. 2 Open the electrical wiring box cover by pulling it to the front.
Page 158 Components a Service cover screw b Service cover NOTICE When closing the service cover, make sure that the tightening torque does NOT exceed 1.4 (±0.2) N•m. TO REMOVE THE ELECTRICAL WIRING BOX COVER Prerequisite: Remove the front grille. 1 Remove 1 screw from the electrical wiring box. 2 Open the electrical wiring box cover by pulling the protruding part on the top of the cover.
Page 159 Components a Screw b Protruding part on the top of the cover c Tab To remove the switch box FTXTA-B units Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144].
Page 160 Components A FTXTM30R units a Power supply terminal X1M b Power supply wiring bracket c Screw (ground wire) d Indoor unit main PCB e Switch box screw f Switch box A FTXTM40R units a Power supply terminal X1M b Power supply wiring bracket c Screw (ground wire) d Indoor unit main PCB e Switch box screw...
Page 161 Components FTXTP-M and ATXTP-M units Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. 1 Disconnect the power supply wiring from the power supply terminal X1M. 2 Remove the screw and power supply wiring bracket.
Page 162 Components 4 Install the air filter, mount the front panel and close it. FTXTP-M and ATXTP-M units 1 Install the front grille and firmly engage the 3 upper hooks. 2 Install 2 screws (class 20~35) or 3 screws (class 50~71) back on the front grille. 3 Install 2 screws back on the front grille.
Page 163 Components 5 Connect the grounding wire to the heat exchanger using the screw. 6 Install the grounding wire cover using the screw. 7 Connect the power supply wiring to the power supply terminal X1M. FTXTM-R units 1 install the switch box in the correct location on the indoor unit. A FTXTM30R units a Power supply terminal X1M b Power supply wiring bracket...
Page 164 Components 2 Route the connectors of the indoor unit fan motor, swing flap motor, swing raster motor and streamer unit inside the switch box and connect them to the indoor unit main PCB. 3 Install and tighten the screw to secure the switch box. 4 Install the heat exchanger thermistor in its holder.
Page 165: Reactor
Components a Backside of the front panel b Fixing tab c Support 3 Close the front panel. 4 Gently press the front panel down until it clicks. FTXTM-R, FTXTP-M and ATXTP-M units 1 Set the filters as they were. 2 Gently press the front panel at both sides and at the center until it clicks. 4.18 Reactor 4.18.1 Checking procedures To perform an electrical check of the reactor...
Page 166 Components a Reactor L804 b Reactor L803 4 Remove the main PCB, see "4.14.2 Repair procedures" [ 132]. The reactor measuring points are ONLY reachable on the back side of the main PCB. 5 Measure the resistance of the reactor using a low ohm multi meter. Result: The resistance MUST be as follows: Measuring points Resistance...
Page 167: Repair Procedures
Components a L804 b L803 c Measuring point Is the inductance measurement Action correct? Return to the troubleshooting of the specific error and continue with the next step. Replace the reactor, see "4.18.2 Repair procedures" [ 167]. 4.18.2 Repair procedures As the reactors are part of the main PCB, replace the complete main PCB. See "4.14 Main PCB" [ 126].
Page 168 Components Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. 1 Disconnect the connector from the streamer unit. A Indoor unit FTXTA-B a Streamer unit connector b Streamer unit A Indoor unit FTXTM-R a Streamer unit connector b Streamer unit 2 Click the streamer unit out of the indoor unit.
Page 169 Components To install the streamer unit 1 Install the streamer unit in the correct location on the indoor unit. A Indoor unit FTXTA-B a Streamer unit connector b Streamer unit A Indoor unit FTXTM-R a Streamer unit connector b Streamer unit 2 Connect the streamer unit harness to the streamer unit.
Page 170: Swing Flap Motor
Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. 4.20 Swing flap motor 4.20.1 Main swing flap motor Checking procedures To perform an electrical check of the swing flap motor FTXTA-B units Prerequisite: Stop the unit operation via the user interface.
Page 171 Components Pins Measured resistance (Ω) 353.4~406.6 653.6~866.4 Swing flap motor resistance Action measurements are correct? Replace the swing flap motor wiring harness, see "Repair procedures" [ 174]. Replace the swing flap motor, see "Repair procedures" [ 174]. FTXTM30R Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 172 Components Swing flap motor resistance Action measurements are correct? Return to the troubleshooting of the specific error and continue with the next procedure. Replace the swing flap motor, see "Repair procedures" [ 174]. FTXTM40R Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 173 Components Pins Measured resistance (Ω) 706.8~813.2 Swing flap motor resistance Action measurements are correct? Replace the swing flap motor wiring harness, see "Repair procedures" [ 181]. Replace the swing flap motor, see "Repair procedures" [ 181]. FTXTP-M and ATXTP-M units Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 174 Components Repair procedures FTXTM-R+(A)(F)TXTP-M units To remove the swing flap motor FTXTM30R Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. 1 Remove the switch box, see "4.17 Plate work" [ 144].
Page 175 Components a Main swing flap b Secondary swing flap c Screw (swing flap motor fixation) d Swing flap motor 5 Remove (pull back) the swing flap motor from the indoor unit. 6 Disconnect the wiring harness from the swing flap motor. 7 To install the swing flap motor, see "Repair procedures" [...
Page 176 Components To install the swing flap motor FTXTM30R 1 Install the coupling piece on the swing flap motor. 2 Install the swing flap motor in the correct location on the indoor unit. a Swing flap b Screw (swing flap motor fixation) c Swing flap motor d Coupling piece 3 Install and tighten the screw to fix the swing flap motor.
Page 177 Components a Main swing flap b Secondary swing flap c Screw (swing flap motor fixation) d Swing flap motor 3 Install and tighten the screw to fix the swing flap motor. 4 Install the secondary swing flap in the indoor unit (by clicking it on). 5 Install the main swing flap in the indoor unit (by clicking it on).
Page 178 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 remove the swing flap motor wiring harness FTXTM40R Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker.
Page 179 Components a Screw (drain hose) b Drain hose c Swing raster motor cover 3 Install the drain hose on the indoor unit. 4 Install the drain hose fixation bracket. Install and tighten the screw. 5 Install the swing flap motor, see "Repair procedures" [ 181].
Page 180: Secondary Swing Flap Motor
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" [ 174]. To install the swing flap motor gearcase assembly 1 Connect the swing flap motor harness to the swing flap motor connector.
Page 181 Components 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 "4.17 Plate work" [ 144]. 1 Disconnect the swing flap motor connector from the indoor unit main PCB. 2 Measure the resistance between the following pins of the motor connector.
Page 182 Components a Fan guard b Rocker arm c Swing raster 5 Remove the main swing flap motor, see "Repair procedures" [ 174]. 6 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 7 Cut all tie straps that fix the wiring harness (harness to main and secondary...
Page 183 Components a Screw b Swing flap motor gearcase assembly 2 Connect the rocker arm to the swing raster. a Fan guard b Rocker arm c Swing raster 3 Tighten the 3 screws to fix the swing flap motor assembly. 4 Route the wiring harness through the harness retainers. 5 Install new tie straps to fix the wiring harness as needed.
Page 184: Swing Raster Motor
Components 4.21 Swing raster motor 4.21.1 Checking procedures To perform an electrical check of the swing raster motor FTXTP-M and ATXTP-M units Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144].
Page 185 Components Pins Measured resistance (Ω) 15-14 353.4~406.6 15-13 15-12 15-11 14-13 706.8~813.2 14-12 14-11 13-12 13-11 12-11 Swing raster motor resistance Action measurements are correct? Return to the troubleshooting of the specific error and continue with the next procedure. Continue with the next step. 3 Remove the swing raster motor, see "4.21.2 Repair procedures" [...
Page 186: Repair Procedures
Components FTXTA-B units Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144]. 1 Disconnect the swing raster motor connector from the indoor unit main PCB. 2 Measure the resistance between the following pins of the motor connector.
Page 187 Components a Swing raster motor cover b Swing raster motor assembly c Screw 3 Remove the 2 screws that fix the swing raster motor assembly to the indoor unit. 4 Disconnect the swing raster shaft from the swing raster motor rod. a Swing raster shaft b Swing raster motor rod c Swing raster motor assembly...
Page 188 Components 3 Remove the screw from the fixation bracket and pull the drain hose downwards to remove it from the indoor unit. a Screw (drain hose) b Drain hose 4 Remove the 2 screws that fix the swing raster motor assembly to the indoor unit.
Page 189 Components a Rod b Link c Screw (swing raster motor fixation) d Swing raster motor 9 Remove the 2 screws that fix the swing raster motor to the bracket. 10 Remove the swing raster motor. 11 Disconnect the wiring harness from the swing raster motor. 12 To install the swing raster motor, see "4.21.2 Repair procedures" [...
Page 190 Components a Swing raster motor cover b Swing raster motor assembly c Screw (swing raster motor assembly) d Fan guard e Swing raster motor rod 5 Remove the 2 screws that fix the swing raster motor assembly to the indoor unit.
Page 191 Components 3 Bring the swing raster motor assembly to the correct position in the indoor unit and guide the swing raster shaft in the swing raster motor assembly. a Swing raster shaft b Swing raster motor rod c Swing raster motor assembly 4 Connect the swing raster motor rod to the swing raster shaft using soft tools.
Page 192 Components FTXTM30R 1 Connect the wiring harness to the swing raster motor. 2 Install the swing raster motor on the correct location on the bracket. a Rod b Link c Screw (swing raster motor fixation) d Swing raster motor 3 Install and tighten the 2 screws to fix the swing raster motor to the bracket. 4 Guide the rod and link inside the bracket to the correct location.
Page 193 Components 11 Connect the drain hose to the indoor unit. a Screw (drain hose) b Drain hose 12 Install the drain hose fixation bracket. Install and tighten the screw. 13 Install the switch box, see "4.17 Plate work" [ 144]. Is the problem solved? Action No further actions required.
Page 194 Components 5 Install and tighten the 2 screws to fix the swing raster motor to the bracket. 6 Install the swing raster motor assembly on the correct location on the indoor unit while guiding the rod inside the swing raster compartment. 7 Install the 2 screws to fix the swing raster motor assembly.
Page 195: Thermistors
Components Is the problem solved? Action Return to the troubleshooting of the specific error and continue with the next procedure. To remove the swing raster motor wiring harness For FTXTM30R units: As the swing raster motor wiring harness is part of the swing flap motor, remove the swing flap motor, see "Repair procedures" [...
Page 196 Components 1 Locate the thermistor and remove the insulation if needed. Check that the thermistor is correctly installed and that there is thermal contact between the thermistor and the piping or ambient (for air thermistor). Is the thermistor correctly installed Action (thermal contact between the thermistor and the piping)?
Page 197 Components Indoor units FTXTM-R Name Symbol Location Connector Inter- Referen (PCB) (pins) mediate connector (table) (pins) Indoor unit Display PCB S800:5‑11 S27:1‑2 on air (room) A3P on display PCB thermistor main PCB (I/ Heat Main (I/U) S501:1‑2 exchanger thermistor Indoor units FTXTP-M and ATXTP-M Name Symbol Location...
Page 198 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 199 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 200: Repair Procedures
Components Does the measured resistance of the Action thermistor match with the temperature determined resistance? Correct the wiring between the thermistor connector on the PCB and the intermediate connector, see "7.2 Wiring diagram" [ 232]. Replace the specific thermistor, see "4.22.2 Repair procedures" [ 200].
Page 201 Components As the indoor unit air (room) thermistor is located on the display PCB, remove the display PCB as described in the steps below: Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [...
Page 202 Components a Tie strap b Insulation c Thermistor wire d Clip e Thermistor f Thermistor holder 3 Cut all tie straps that fix the thermistor harness. 4 Disconnect the thermistor connector from the appropriate PCB and remove the thermistor. INFORMATION Some of the thermistors are wired to the same connector.
Page 203 Components a Display PCB b Indication lamp cover 3 Install the indication lamp cover in the correct location on the indoor unit. 4 Install the display panel. ▪ FTXTP-M AND ATXTP-M UNITS 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.
Page 204 Components a Clip b Thermistor c Thermistor holder d Insulation e Thermistor wire f Tie strap 2 Route the thermistor harness towards the appropriate PCB. 3 Connect the thermistor connector to the appropriate PCB. INFORMATION Some of the thermistors are wired to the same connector. See connector and pin information of the thermistors at the start of the electrical check procedure and "7.2 Wiring diagram" [...
Page 205: Wifi Control Pcb
Components 4.23 Wifi control PCB 4.23.1 Checking procedures To perform a power check of the wifi control PCB Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. 1 Remove the required plate work, see "4.17 Plate work" [ 144].
Page 206: Repair Procedures
Components 4 Measure the output voltage between between the pins 4‑5 on the connector S801 on the indoor unit main PCB. Result: The measured voltage MUST be 10~16 V DC. Is the output voltage on the indoor unit Action main PCB correct? Replace the wifi control PCB wiring harness, see "4.23.2 Repair...
Page 207 Components A Indoor unit FTXTM-R a Wifi control PCB assembly 3 To install wifi control assembly, "4.23.2 Repair procedures" [ 206]. To install the wifi control PCB 1 Click the wifi control PCB assembly on the indoor unit. A Indoor unit FTXTA-B a Wifi control PCB assembly A Indoor unit FTXTM-R a Wifi control PCB assembly...
Page 208 Components 2 Connect the harness to the wifi control PCB assembly. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure. To remove the wifi control PCB wiring harness Prerequisite: Stop the unit operation via the user interface.
Page 209: Third Party Components
Third party components 5 Third party components 5.1 Electrical circuit 5.1.1 Checking procedures To check the power supply of the unit Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144].
Page 210: 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 "5.1.2 Repair procedures" [ 210]. Adjust the power supply to the unit, see "5.1.2 Repair procedures" [ 210]. To check if the power supply is compliant with the regulations 1 Check that the power source is in line with the requirements described in the databook.
Page 211: Refrigerant Circuit
Third party components To correct the wiring from the main power supply terminal to the indoor unit power supply terminal Prerequisite: Stop the unit operation via the user interface. Prerequisite: Turn OFF the respective circuit breaker. Prerequisite: Remove the required plate work, see "4.17 Plate work" [ 144].
Page 212 Third party components a Cap b Liquid stop valve c Gas stop valve 2 Check if the stop valves are completely open. The refrigerant circuit stop valves are Action open? Return to the troubleshooting of the specific error and continue with the next procedure.
Page 213 Third party components 7 On the refrigerant liquid piping (between the indoor unit heat exchanger and the outdoor unit heat exchanger (coil)), using a contact thermometer, measure the temperature before and after every restricting device. If a big temperature difference is measured (>2.5~4K), an internal pipe obstruction may be present at this location.
Page 214 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 215 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 216: 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 217 Third party components a Cap b Liquid stop valve c Gas stop valve 2 Completely open the stop valves by screwing the stop valve screw counterclockwise. Is the problem solved? Action No further actions required. Return to the troubleshooting of the specific error and continue with the next procedure.
Page 218 Third party components a Vacuum pump b Connect flexible hose to service port c To recovery pump L Low pressure H High pressure V Vacuum R Refrigerant 3 To add refrigerant, see "5.2.2 Repair procedures" [ 216]. Is the problem solved? Action No further actions required.
Page 219 Third party components ▪ Make sure to use the appropriate equipment and tools according to the refrigerant and unit type. ▪ R32 can be charged in gas phase. ▪ Make sure to use a digital scale (no charging cylinder). ▪ Execute correct vacuum drying procedure after repair: –0.1 MPa / –760 mm Hg / –750 Torr / –1 bar for at least 1 hour.
Page 220: External Factors
Third party components ▪ Pipe expansion / flare making: Remove any burrs on the cut surface using the correct tool such as reamer or scraper (note that excessive deburring can thin the pipe walls and cause cracking of the pipe). Make sure the flare has the correct size (use a flare gauge).
Page 221 Third party components To check the required space around the outdoor unit heat exchanger 1 Check if the space around the outdoor unit heat exchanger is sufficient. See the installation manual for the required space specifications. Adjust as needed. Is the problem solved? Action No further actions required.
Page 222: Maintenance
General maintenance/inspection checklist. Next to the maintenance instructions in this chapter, a general maintenance/inspection checklist is also available on the Daikin Business Portal (authentication required). The general maintenance/inspection checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during maintenance.
Page 223: To Clean The Indoor Unit Heat Exchanger In Extreme Condition
Maintenance 6.3 To clean the indoor unit heat exchanger in extreme condition When cleaning the indoor unit heat exchanger (contaminated by cooking oil, …), make sure to: ▪ Use proper field supply cleaning agent which is suitable for cleaning heat exchangers and drain pans.
Page 224: To Clean The Front Panel
Maintenance 6.5 To clean the front panel 1 Clean the front panel with a soft cloth. If it is difficult to remove stains, use water or a neutral detergent. 6.6 To clean the air filters FTXTA-B units 1 Push the tab at the centre of each air filter, then pull it down. 2 Pull out the air filters.
Page 225 Maintenance 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. Dry the air filters in the shade. ▪...
Page 226 Maintenance 5 Soak in lukewarm water for about 10 to 15 minutes. 6 Install all filters back in their original positions. INFORMATION ▪ If the dust does NOT come off easily, wash them with a neutral detergent diluted in lukewarm water. Dry the air filters in the shade. ▪...
Page 227: To Clean The Titanium Apatite Deodorising Filter And The Silver Particle Filter (Ag-Ion Filter)
Maintenance 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. Dry the air filters in the shade. ▪...
Page 228 Maintenance 3 Soak the filter for 10 to 15 minutes in warm water. Note: Do NOT remove the filter from the frame. 4 After washing, shake off remaining water and dry the filter in the shade. Do NOT wring out the filter when removing water. FTXTM-R units INFORMATION Clean the filter with water every 6 months.
Page 229: To Replace The Titanium Apatite Deodorising Filter And The Silver Particle Filter (Ag-Ion Filter)
Maintenance Class 30 Class 40 4 After washing, shake off remaining water and dry the filter in the shade. Do NOT wring out the filter when removing water. FTXTP-M and ATXTP-M units INFORMATION Clean the filter with water every 6 months. 1 Remove the silver particle filter (Ag-ion filter) and titanium apatite deodorising filter from the tabs 2 Remove the dust from the filter with a vacuum cleaner.
Page 230 Maintenance FTXTA-B units 1 Remove the filer from the tabs of the filter frame and replace the filter with a new one. INFORMATION ▪ Do NOT throw away the filter frame, but use it again. ▪ Dispose of the old filter as non-flammable waste. FTXTM-R units 1 Remove the filter from the tabs (class 30) or frame (class 40) and replace the filter with a new one.
Page 231: Technical Data
Technical data 7 Technical data 7.1 Detailed information setting mode 7.1.1 Detailed information setting mode: Indoor unit See the installer reference guide on business portal for more information. 7.1.2 Detailed information setting mode: Outdoor unit See the installer reference guide on business portal for more information. 7.1.3 Detailed information setting mode: Remote controller See the installer reference guide on business portal for more information.
Page 232: Wiring Diagram
Technical data 7.2 Wiring diagram 7.2.1 Wiring diagram: Outdoor unit Unified wiring diagram legend For applied parts and numbering, refer to the wiring diagram on the unit. Part numbering is by Arabic numbers in ascending order for each part and is represented in the overview below by "*"...
Page 233 Technical data Symbol Meaning Heater FU*, F*U, (for characteristics, refer to Fuse PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L Pilot lamp, light emitting diode Light emitting diode (service monitor green) HIGH VOLTAGE High voltage Intelligent eye sensor IPM* Intelligent power module K*R, KCR, KFR, KHuR, K*M...
Page 234 Technical data Symbol Meaning Float switch S*NG Refrigerant leak detector S*NPH Pressure sensor (high) S*NPL Pressure sensor (low) S*PH, HPS* Pressure switch (high) S*PL Pressure switch (low) Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S Surge arrester SR*, WLU Signal receiver Selector switch SHEET METAL...
Page 235: Wiring Diagram: Indoor Unit
Technical data 7.2.2 Wiring diagram: Indoor unit Unified wiring diagram legend For applied parts and numbering, refer to the wiring diagram on the unit. Part numbering is by Arabic numbers in ascending order for each part and is represented in the overview below by "*" in the part code. Symbol Meaning Symbol...
Page 236 Technical data Symbol Meaning FU*, F*U, (for characteristics, refer to Fuse PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L Pilot lamp, light emitting diode Light emitting diode (service monitor green) HIGH VOLTAGE High voltage Intelligent eye sensor IPM* Intelligent power module K*R, KCR, KFR, KHuR, K*M...
Page 237 Technical data Symbol Meaning S*NG Refrigerant leak detector S*NPH Pressure sensor (high) S*NPL Pressure sensor (low) S*PH, HPS* Pressure switch (high) S*PL Pressure switch (low) Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S Surge arrester SR*, WLU Signal receiver Selector switch SHEET METAL Terminal strip fixed plate...
Page 238 Technical data FTXTA-B units INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. Streamer unit Streamer part MS W MS W MS W...
Page 239 Technical data FTXTM30R INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. STREAMER UNIT STREAMER PART INDOOR UNIT S102 S700...
Page 240 Technical data FTXTM40R INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. STREAMER UNIT STREAMER PART INDOOR UNIT S102 S700...
Page 241 Technical data FTXTP-M + ATXTP-M 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. Field wiring Indoor Transmissionn circuit Outdoor...
Page 242: Piping Diagram
Technical data 7.3 Piping diagram 7.3.1 Piping diagram: Outdoor 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 243: Piping Diagram: Indoor Unit
Technical data 7.3.2 Piping diagram: Indoor unit FTXTA-B 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. a Field piping (liquid: Ø6.4 mm flare connection) b Field piping (gas: Ø9.5 mm flare connection) c Crossflow fan...
Page 244 Technical data FTXTM30R INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. ·6.4· CuT ·6.4· CuT ·9.5·...
Page 245 Technical data FTXTM40R INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. 6.4 CuT 6.4 CuT 12.7 CuT 12.7 CuT a Field piping (liquid: Ø6.4 mm flare connection)
Page 246 Technical data ATXTP25M + FTXTP25M INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. 6.4CuT 6.4CuT 9.5CuT 9.5CuT a Field piping (liquid: Ø6.4 mm flare connection)
Page 247 Technical data ATXTP35M + FTXTP35M INFORMATION The diagrams shown in this manual may be incorrect due to changes/updates to the unit. Correct diagrams are supplied with the unit and can also be found in the technical data book. 6.4CuT 6.4CuT 9.5CuT 9.5CuT a Field piping (liquid: Ø6.4 mm flare connection)
Page 248: Component Overview
Technical data 7.4 Component overview 7.4.1 Component overview: Outdoor unit a Fan k Muffler with filter b Fan motor M1F l Accumulator c Muffler m 4‑way valve body d Discharge pipe thermistor R3T n Air thermistor R1T e Compressor M1C o Heat exchanger f High pressure switch S1PH p Muffler...
Page 249: Component Overview: Indoor Unit
Technical data 7.4.2 Component overview: Indoor unit FTXTA-B a Heat exchanger i Streamer unit b Front panel motor j Indoor unit PCB c Heat exchanger thermistor R1T k Switch box d Fan motor l Wifi control PCB e Swing raster motor m Humidity sensor PCB (including room thermistor R2T) f Secondary swing flap motor n Intelligent thermal sensor...
Page 250 Technical data FTXTM30R a Heat exchanger h Display PCB A3P b Streamer unit i Swing flap c Indoor unit main PCB A1P j Fan d Switch box k Heat exchanger thermistor R2T e Indoor unit power PCB A2P l Indoor unit fan motor M1F f Wifi control PCB A6P m Swing raster motor M1S g Intelligent eye sensor (PCB A5P)
Page 251 Technical data FTXTM40R a Heat exchanger h Swing flap b Indoor unit main PCB A1P i Fan c Switch box j Heat exchanger thermistor R2T d Indoor unit power PCB A2P k Indoor unit fan motor M1F e Wifi control PCB A6P l Swing raster motor M1S f Intelligent eye sensor (PCB A5P) m Swing flap motor M2S...
Page 252 Technical data FTXTP-M + ATXTP-M 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 i Swing raster motor j Swing raster RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B...
Page 253: Field Information Report
Technical data 7.5 Field information report See next page. RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W) Service manual (B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B R32 Optimized Heating 4 Split ESIE21-12A – 2022.02...
Page 254 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 255 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 256: Service Tools
Technical data 7.6 Service tools 1 For an overview of the available service tools, check the Daikin Business Portal (authentication required). 2 Go to the tab After-sales support on the left navigation pane and select Technical support. 3 Click the button Service tools. An overview of the available service tools for the different products is shown.
Page 257: Field Settings
Technical data 7.7 Field settings 7.7.1 Field settings: Indoor unit 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.
Page 258 Technical data FTXTP-M and ATXTP-M units INFORMATION When there is a big difference between the indoor room temperature and the set temperature in heating mode, adjust the target set temperature field setting. ▪ Target temperature = remote controller set temperature + 2.5°C. For example: Remote controller set temperature = 20°C Target temperature = 20°C + 2.5°C = 22.5°C...
Page 259 Technical data 5 Press 6 Select 4. 7 Press to confirm. 8 Press 9 Select 0 (0: fan ON, 1: fan OFF (factory setting)). 10 Press to confirm. To change auto restart ON to OFF FTXTA-B and FTXTM-R units INFORMATION After power failure, the unit will automatically restart (default setting).
Page 260: Field Settings: Outdoor Unit
Technical data 7.7.2 Field settings: Outdoor unit To set 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 –10°C.
Page 261 Technical data To set the snowfall prevention settings In heavy snow areas, snow may cover the outdoor unit, a snowdrift pile may be formed near the outdoor unit, or icicles may reach the outdoor unit during the night. If such conditions are left uncorrected, operating the air conditioner in the next morning can cause damage to the outdoor unit fan or result in fan lock error, disallowing proper heating operation in some cases.
Page 264 ESIE21-12A 2022.02 Verantwortung für Energie und Umwelt...

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