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Daikin ARXN25MV1B, Service Manual

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Daikin ARXN25MV1B Service Manual Download Page 73

Product manufactured in an ISO certi

fi

 ed facility.

This document contains the most current information as of this orienting.

For the most up to date product information, please go to www.daikin-oyl.com.my

Summary of Contents for ARXN25MV1B

Page 1: ...SERVICE MANUAL Inverter DOO 0RXQWHG Single Split SM 5WMY A1 R410A ...

Page 2: ...16 2 9 Minimum Off Time Control 16 2 10 Auto Restart 17 2 11 Auto Random Restart 17 2 12 Four Way Valve Control 17 2 13 Outdoor Fan Control 18 2 14 Rotation Regulating Functions 18 2 15 Defrost Cycle 20 2 16 Indoor Coil Freeze Prevention 20 2 17 High Pressure Protection 20 2 18 Discharge Pipe Temperature Control 21 2 19 Oil Recovery Control Applicable for ARXN RXN_L 21 2 20 Overall Current Control...

Page 3: ...embling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the discharging refrigerant gas The ref...

Page 4: ...del and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating the equipment make sure that the new installation site has sufficient strength to withstand the weight of the equipment If the installation site does not have sufficient strength and if the ins...

Page 5: ...vent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic gases when it contacts flames such as fan and other heaters stoves and ranges When replacing the coin battery in the remote controller be sure to disposed of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor immediately Warning ...

Page 6: ...measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the furniture and floor Icon Type of Information Description Note Note A note provides information that is not indispen...

Page 7: ...50 60BV1B x x x x FTXN25 35 50 60MV1 x x x x FTXN25 35 50 60MV1B x x x x FTXN25 35 50 60MV1B9 x x x x ATXN25 35 50 60MV1B x x x x 1 1 2 Outdoor Unit Nomenclature Classification Refrigerant control Fin Compressor Others EXV Hydrophilic blue DC Inverter Swing CE marking RXB50 60BV1B x x x x RXN25 35 50 60MV1 x x x x RXN25 35 50 60MV1B x x x x RXN25 35 50 60MV1B9 x x x x ARXN25 35 50 60MV1B x x x x R...

Page 8: ...FTXN25 35L M 1 2 1 1 Main PCB Item Indication on PCB Description 1 A1 Connector for fan motor 2 A2 Connector for swing motor 3 A3 Connector for fan motor feedback 4 A4 Fuse 5 A5 Varistor 6 A6 Connector for wired handset 7 A7 Connector for signal receiver PCB 8 A8 Connector for heat exchanger thermistor ...

Page 9: ...ter Single Split 3 1 2 1 2 Signal board Item Indication on PCB Description 1 A1 Operation ON OFF switch 2 A2 Led for sleep red 3 A3 Led for timer yellow 4 A4 Led for operation 5 A5 Connector for control PCB ...

Page 10: ...XN50 60L M 1 2 2 1 Main PCB Item Indication on PCB Description 1 A1 Connector for fan motor 2 A2 Connector for swing motor 3 A3 Connector for wired panel 4 A4 Connector for Signal Receiver PCB 5 A5 Connector for heat exchanger thermistor 6 A6 Varistor 7 A7 Fuse ...

Page 11: ...ter Single Split 5 1 2 2 2 Signal board Item Indication on PCB Description 1 A1 Connector for Control PCB 2 A2 LED for operation 3 A3 LED for timer yellow 4 A4 LED for sleep red 5 A5 Operation ON OFF switch ...

Page 12: ...Inverter Single Split 6 1 2 3 Outdoor PCB ARXN RXN25 35L M 1 2 3 1 Filter PCB Item Indication on PCB Description 1 S11 Connector for indoor PCB 2 FU3 Fuse 20A 3 V2 V3 Varistor ...

Page 13: ...ctronic expansion valve coil 3 S40 Connector for overload protector 4 S70 Connector for fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 7 HL3 HN3 Connector for filter PCB 8 FU1 FU2 Fuse 3 15A 9 LED A Service monitor LED green 10 V1 Varistor ...

Page 14: ...ion on PCB Description 1 S11 Connector for S10 on main PCB 2 HL1 HN1 S Connector for terminal board 3 E1 E2 Terminal for earth wire 4 HL2 HN2 Connector for HL3 HN3 on main PCB 5 HL4 HN4 Connector for S12 on main PCB 6 FU1 Fuse 3 15A 250V 7 FU3 Fuse 30A 250V 8 V2 V3 Varistor Filter PCB RXN50 60MV1B9 ...

Page 15: ...alve coil 4 S40 Connector for overload protector 5 S50 Connector for magnetic relay 6 S70 Connector for fan motor 7 S80 Connector for four way valve coil 8 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 9 HL3 HN3 Connector for HL2 HN2 on filter PCB 10 U V W Terminal for compressor 11 FU2 Fuse 3 15A 250V 12 LED A LED for service monitor green 13 V1 Varistor ...

Page 16: ...ector for IPM PCB 2 A2 Connector for heat sink thermistor 3 A3 Connector for thermistors outdoor air heat exchanger discharge pipe 4 A4 Connector for electronic expansion valve coil 5 A5 A6 Connector for display PCB 6 A7 Connector for four way valve coil 7 A8 Connector for fan motor 8 A9 Fuse 9 A10 A11 A12 A13 Varistor ...

Page 17: ...ingle Split 11 1 2 5 2 IPM board Item Indication on PCB Description 1 A1 A2 A3 Connector to compressor 1 2 5 3 Display board Item Indication on PCB Description 1 A1 Connector to control PCB 2 A2 7 segment display ...

Page 18: ...ation Model Max total piping length m Max height difference m Pre charge for up to piping length m Additional charge g m ARXN RXN25M 20 10 7 5 20 ARXN RXN35M 20 10 7 5 20 ARXN RXN50M RXB50B RX50CG 30 10 7 5 20 ARXN RXN60M RXB60B RX60CG 30 10 7 5 20 ...

Page 19: ...ing Mode Operation The system has 5 operating modes The mode selection is done from indoor using handset The operating modes are Cool Heat Fan Auto Dry 2 2 1 Cooling Mode When Tr Ts 1 5 C Compressor Indoor Fan and Outdoor Fan ON When Tr Ts 2 C Compressor and Outdoor Fan OFF Indoor Fan remained ON Tr Room Temperature Ts Set Temperature When cooling load is too small and the room temperature still f...

Page 20: ... Fan speed will maintain same as during fan mode 2 4 Auto Mode Automatic Cooling Heating Function When the automatic operation is selected with the remote controller the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start up The unit automatically switches the operation mode to maintain the room temperat...

Page 21: ... sleep operation operation OFF signal run sleep operation 1hr 1hr shift 0 5 C shift 1 0 C shift 1 0 C shift 2 0 C target temperature COOL or DRY target temperature HEAT no offset on target temperature 2 7 Indoor Outdoor Communication Master by outdoor unit Indoor controller board will transmit signal to outdoor controller board every 0 5s Outdoor unit will response to indoor once the valid data is...

Page 22: ...n Valve EXV control Outdoor coil Used for defrost control Also used for inverter current protection control in Series II Outdoor air Used for defrost outdoor fan speed control Also used for overall current protection preheating operation control Heat sink Used for capturing heat sink temperature Applicable for Daikin controller Suction pipe Used for Electronic Expansion Valve EXV suction pipe SH p...

Page 23: ... the auto random restart function kindly cut off the jumper J_AUTO as highlighted in attachment Please be informed that after disable auto random restart unit is not able to restart with last state memory after power resume from failure Unit will revert to default setting as below Default setting Unit Off Temperature 24 C Fan speed High Mode Cooling 2 12 Four Way Valve Control Change over switchin...

Page 24: ... Target rotation Defrost control for heat pump model only 2 14 1 Starting Rotation Starting Control To avoid excessive oil discharge from compressor or to promote oil lubrication during startup To prevent liquid flood back to the compressor To limit starting current When compressor starts to rotate from OFF to ON compressor rotation is set to run gradually to each upper limit at a specific timer s...

Page 25: ...erence from the previously calculated rotation I control if the operating frequency is not changed more than a certain fixed time If Σ T is small lower frequency If Σ T is large increase frequency 2 14 5 Limit Rotation Determine from Upper limit rotation A minimum value was determined among the upper limits rotation i e protection controls Lower limit rotation A maximum value was determined among ...

Page 26: ... more than 180s Compressor will stop OD fan stop after 30s and indoor fan can only run at lowest fan speed The unit can only be restarted after 3 minutes When the indoor coil temperature 13 C the compressor frequency will be reset based on the OD ambient room and set temperature 2 17 High Pressure Protection To prevent high pressure in the system Compressor operating frequency is adjusted based on...

Page 27: ...s protection is activated when the compressor discharge temperature 110 C The compressor will stop and considered trip If the compressor discharge temperature 90 C the compressor frequency will be reset based on the OD ambient set and room temperature 2 19 Oil Recovery Control Applicable for ARXN RXN50 60L When the compressor operates for certain duration at low frequency the oil level in the comp...

Page 28: ...XN25 35L M 14 0A ARXN RXN50 60_L 12 0A ARXN RXN50 60M RXB50 60B RX50 60CGXV1 16 5A When the input current for running compressor exceeds L2 running frequency will be reduced by 1 step If current still exceeds L2 frequency will be reduced by another 1 step until total current falls between L2 and L3 This protection cut in when the input current exceeds L1 for 2 seconds Compressor will stop and it i...

Page 29: ...de 1 Hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5 seconds until indication flashes on the handset temperature display section 2 Then press the same button repeatedly A series of error code will appear until ID buzzer produces a long beep The corresponding error code is indicated on the handset temperature display section 3 ID unit buzzer will produce a long beep if the handset error code ma...

Page 30: ... Repeat the normal step to retrieve error by using remote controller step Holding TIMER CANCEL 9 By using this method the error shown will be Last State Error Previous error in this unit 3 1 3 Error Code retrieved by wired handset BRC52A61 The error will show at the LCD display BRC51A61 can retrieved last state memory by Press SLEEP TIMER ACTIVE simultaneously for 5 seconds and the error will be f...

Page 31: ...unning number shows the parameter number Then the 7 segment will flash again showing the parameter measurement When the 7 segment display is left untouched for 5 min the display will light off Dim Parameter Number Parameter Description Unit Range 00 Compressor Actual Rotation r s 01 Compressor Target Rotation r s 02 DC Bus Voltage VDC 03 Total Current x10 A 04 Outdoor Air Temperature C 05 Outdoor ...

Page 32: ...1 E8 AC INPUT OVER CURRENT O O 12 EA 4 WAY VALVE ABNORMALITY O O 13 F3 DISCHARGE PIPE OVERHEAT O O 14 F6 HEAT EXCHANGER OVERHEAT O O 15 H0 COMPRESSOR SENSOR SYSTEM ABNORMAL O 16 H6 POSITION SENSOR ABNORMAL COMPRESSOR O O 17 H8 AC CURRENT SENSOR ABNORMALITY O O 18 H9 OUTDOOR AIR THERMISTOR ABNORMALITY O O 19 J3 COMPRESSOR DISCHARGE PIPE THERMISTOR ABNORMALITY O O 20 J6 OUTDOOR HEAT EXCHANGER THERMI...

Page 33: ...ndoor PCB 2 Faulty connector connection at indoor Troubleshooting No Any sign of loose or abnormal Yes Turn off unit Check indoor PCB connector conditions including PCB to terminal block and all PCB wire connector Replace indoor PCB and operate again Connect correctly and operate again ...

Page 34: ...r short circuit Does it conform to the thermistor resistance table Yes No Check indoor air flow Check intake air filter Check fan blower condition Change indoor thermistor Check the dust accumulate indoor coil No Yes Change indoor PCB Provide sufficient air passage Is it very dirty Yes No Clean the air filter Check indoor coil thermistor resistance Is it very dirty Yes Refer to thermistor resistan...

Page 35: ...r Turn off power supply and rotate fan by hand No Connect correctly Change fan motor C4 Description INDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY Supposed Cause 1 Thermistor connector faulty 2 Indoor PCB faulty Troubleshooting Normal No Yes Normal Refer thermistor resistance table Page 60 item 6 1 Replace PCB Check thermistor resistance value Check the thermistor connector condition No Replace ther...

Page 36: ... Cause 1 Thermistor connector faulty 2 Indoor PCB faulty Troubleshooting Yes Normal No Yes Normal Refer thermistor resistance table Page 60 item 6 1 Replace PCB Check thermistor resistance value Check the thermistor connector condition No Replace thermistor Correct the connection ...

Page 37: ... Momentary voltage drop Momentary power failure 2 Damage of EEPROM 3 Faulty outdoor unit PCB 4 Broken hardness between PCB Troubleshooting Error still occur No Yes Grounded Yes Turn on the power again Replace the harness Check if the outdoor unit is grounded No Ground the system Is the harness broken Replace outdoor PCB Replace outdoor PCB No Yes ...

Page 38: ...ce electronic expansion or the coil Discharge pipe thermistor disconnected No Yes Insert thermistor in position Check resistance of 2 terminals connector S40 Malfunction Resistance between 2 WHUPLQDOV LV Disconnect 2 terminals of OL Replace outdoor PCB No Refer to thermistor resistance table Page 60 item 6 1 Replace thermistor Refer refrigerant line check procedures Connectors properly connected Y...

Page 39: ...efer page 61 item 6 3 5HIHU SDJH LWHP Resistance IROORZ VSHF No Yes Compressor stop without UXQQLQJ No Yes Change outdoor PCB Change compressor Turn off unit Disconnect compressor wire hardness U V W and check winding RQQHFW EDFN ZLUH DQG WXUQ on unit Check HOHFWURQLF expansion 5HSODFH HOHFWURQLF H SDQVLRQ RU WKH FRLO 0DOIXQFWLRQ Yes No Yes 0DOIXQFWLRQ 0DOIXQFWLRQ Yes No 5HSODFH RXWGRRU 3 5HIHU UH...

Page 40: ... valve coil Replace it as required Emergency stop without compressor running No Yes Replace the compressor Yes Replace the compressor System shut down after errors repeated several times No Turn off power Disconnect harnesses U V and W Turn off power and reconnect harnesses Turn on power again and restart system Remark Refer to Appendix A for Inverter analyzer check Page 63 item 6 5 Use Inverter c...

Page 41: ...B Troubleshooting Turn on the power Check rotation pulse input on outdoor unit PCB Fan rotates smoothly No Yes Turn off power and reconnect connector Fan motor connector disconnected No Yes Foreign matters in or arround fan No Rotate the fan Yes Remove foreign matters Replace outdoor fan motor Yes Replace outdoor PCB Pulse signal generated No Replace outdoor fan motor Remark Refer Appendix A for r...

Page 42: ... Change outdoor Control Box Check with the inverter checker Check outdoor fan motor outdoor ambient temperature refrigerant charge level Turn off the power and disconnect the harness U V and W No Refer to the type of abnormality and conduct proper service Yes Change Compressor Input current flowing above its stop level Yes No Replace the outdoor unit No Remark Refer to Appendix A for Inverter anal...

Page 43: ...our way valve coil Replace the defective thermistor s Malfunction Replace the outdoor unit PCB Reconnect the thermistor s Reconnect the harness Resistance between harnesses No Yes Any thermistor disconnected Yes No Check the thermistors Malfunction Functioning Refer to the refrigerant line check procedure Replace the four way valve defective or dust clogged Check the refrigerant line Malfunction F...

Page 44: ...stor Outdoor temperature thermistor Functioning Functioning Replace the defective thermistor s Check the refrigerant line Malfunction Refrigerant shortage Four way valve Water mixed Stop valve Functioning Refer to the refrigerant line check procedure Replace the electronic expansion valve or the coil Malfunction Replace the outdoor unit PCB Remark Refer to Appendix A for thermistor resistance chec...

Page 45: ...stallation condition Functioning Functioning Functioning Functioning Malfunction Change the installation location or direction Clean the outdoor heat exchanger Replace the outdoor fan motor Reconnect the connector or fan motor lead wires Replace the electronic expansion valve or the coil Replace the outdoor unit PCB Check the outdoor heat exchanger thermistor Malfunction Remark Refer to Appendix A...

Page 46: ...harness 2 Outdoor unit PCB defective 3 Defective compressor Troubleshooting Disconnect the reactor wire and measure resistance between terminal Any abnormal Yes No Check reactor connection Check reactor resistance Check compressor resistance Change outdoor PCB Yes No Change reactor Yes No Change Compressor Connect back reactor ...

Page 47: ... Yes No problem Keep on running No Replace the harness Replace the PCB Check the harness S30 H0 ARXN RXN50 60L M Description COMPRESSOR SENSOR SYSTEM ABNORMAL Supposed Cause 1 Broken and disconnected harness 2 Outdoor unit PCB defective Troubleshooting Is the harness broken Restart operation and error displayed again Yes No Turn off the power and turn it on again Check the relay harness for the co...

Page 48: ...closed 5 Input voltage out of specification Troubleshooting Normal Compressor harness connected as specified No Yes Check for short circuit Check with inverter checker Check the electrolytic capacitor voltage Yes Turn off the power Disconnect the harness U V and W Replace the outdoor unit PCB outdoor unit fan No Reconnect as specified Remark Refer to Appendix A for Inverter analyzer check Page 63 ...

Page 49: ...esses connected as specified No Yes Check for short circuit Check with inverter checker Check the electrolytic capacitor voltage Turn off the power Disconnect the harness U V and W Replace the outdoor unit PCB outdoor unit fan DC320 30 V No Yes No Any LED off Yes Correct the power supply or replace the outdoor unit PCB No Reconnect as specified Inverter checker Part No 1225477 Replace the outdoor ...

Page 50: ...the power Check the electrolytic capacitor voltage Any LED off No Correct the power supply or replace the outdoor unit PCB Reconnect the electrical components or compressor harnesses as specified Electrical components or compressor harnesses connected as specified No Inverter analyzer RSUK0917C Check the short circuit of the diode bridge Normal No Yes Replace the outdoor unit PCB 320 50 VDC No Yes...

Page 51: ... PCB defective Troubleshooting Connection correct No Yes Change outdoor PCB Restart the system and check connector between main board and IPM board Check compressor harness connection Does it connect properly No Yes Reconnect it properly Reconnect it correctly Remark This error is only applicable for model ARXN RXN50 60L ...

Page 52: ...oting No Yes Turn on the power again Check the indoor heat exchanger thermistor resistance value in the heating operation Check the thermistor resistance value Normal J3 error the discharge pipe temperature is lower than the heat exchanger temperature Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature No Yes Yes Replace the defective thermistor s of the following ...

Page 53: ...eat sink thermistor resistance Change heat sink or check outdoor fan condition Turn off the unit and turn on back after 20 mins Resistance normal Heat sink temperature A C No Yes Outdoor fan functioning Yes Heat sink dirty Yes Check outdoor fan No No Clean the heat sink No Change outdoor fan motor Check installation condition Change outdoor PCB Change thermistor Remark Refer to Appendix A for ther...

Page 54: ...tem Has the PCB been replaced Above A C Check the radiation fin temperature Check the outdoor fan Malfunction No Functioning Radiation fin dirty Yes Check if silicon grease is applied properly on the radiation fin If not apply the silicon grease Replace the outdoor fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Replace the outdoor unit PCB Check the installation ...

Page 55: ...tion condition Check with the inverter analyzer Check the power supply voltage Turn off the power and turn it on again to start the system See if the same error occurs No Turn off the power and reconnect the harnesses Turn on the power again and start operation Turn off power and disconnect the harnesses U V and W Error again No Yes Yes Any LED off Voltage as rated Yes Correct the power supply or ...

Page 56: ...l thermistor Put the thermistor back to actual position Check the indoor coil outdoor coil and discharge pipe thermistor resistance Thermistor in actual position Resistance normal EXV functioning Any leakage No Fully open stop valve No Change thermistor No Change EXV No Check for leakage Repair the leak point Check stop valve Check EXV Yes Refrigerant charge sufficient Change outdoor PCB Check ref...

Page 57: ...ubleshooting Is the voltage fluctuation within 10 from the rated value No Yes Yes Check the power supply voltage Turn on the power Check the connection of the compressor harness Yes Disturbance factors Noise Power supply distortion Replace the outdoor fan motor and the outdoor unit PCB Check for such factors for a long term Loose or disconnected Does the outdoor fan rotate smoothly System restarte...

Page 58: ... the indoor unit outdoor unit connection wires No Check the LED A on the outdoor unit PCB Check the power supply waveform Check the voltage of the connection wires on the indoor terminal board between No 1 L and SIG and between No 2 N and SIG Replace the connection wires between the indoor unit and outdoor unit Locate the cause of the disturbance of the power supply waveform and correct it No Corr...

Page 59: ...ong outdoor unit PCB mounted or defective Troubleshooting OK No Yes Are the connecting wires connected properly Yes No Correct the connection Match the compatible models Matched compatibly No Yes Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB Check the combination of the indoor and outdoor unit Check the indoor and outdoor PCB part number ...

Page 60: ...Wiring Connection 54 4 0 Wiring Connection Model ATXN FTXN 25 35L M ARXN RXN 25 35L M ...

Page 61: ...Wiring Connection 55 Model ATXN FTXN 50 60L ARXN RXN 50 60L ...

Page 62: ...Wiring Connection 56 Model ATXN FTXN 50 60M ARXN RXN 50 60M ...

Page 63: ...INDOOR UNIT OUTDOOR UNIT PIPING GAS PIPING LIQUID 2 WAY VALVE STRAINER STRAINER ELECTRONIC EXPANSION VALVE 3 WAY VALVE DISCHARGE PIPE THERMISTOR ACCUMULATOR COMPRESSOR MUFFLER MUFFLER AIR THERMISTOR HEAT EXCHANGER INDOOR UNIT HEAT EXCHANGER THERMISTOR AIR THERMISTOR HEAT EXCHANGER OUTDOOR UNIT HEAT EXCHANGER THERMISTOR HEA 4WV ...

Page 64: ... 76E 00 3 3 18E 01 3 26E 01 3 33E 01 47 44 4E 00 4 52E 00 4 60E 00 2 3 04E 01 3 11E 01 3 18E 01 48 4 29E 00 4 37E 00 4 42E 00 1 2 90E 01 2 97E 01 3 03E 01 49 4 15E 00 4 22E 00 4 30E 00 0 2 78E 01 2 84E 01 2 90E 01 50 4 01E 00 4 09E 00 4 16E 00 1 2 66E 01 2 71E 01 2 77E 01 51 3 88E 00 3 95E 00 4 03E 00 2 2 54E 01 2 59E 01 2 65E 01 52 3 75E 00 3 82E 00 3 90E 00 3 2 43E 01 2 48E 01 2 53E 01 53 3 63E ...

Page 65: ... 00 33 7 31E 00 7 40E 00 7 50E 00 83 1 45E 00 1 49E 00 1 54E 00 34 7 04E 00 7 14E 00 7 23E 00 84 1 41E 00 1 45E 00 1 49E 00 35 6 79E 00 6 88E 00 6 98E 00 85 1 37E 00 1 41E 00 1 45E 00 36 6 54E 00 6 64E 00 6 73E 00 86 1 33E 00 1 37E 00 1 41E 00 37 6 31E 00 6 40E 00 6 50E 00 87 1 30E 00 1 33E 00 1 38E 00 38 6 09E 00 6 18E 00 6 27E 00 88 1 26E 00 1 30E 00 1 34E 00 39 5 87E 00 5 96E 00 6 05E 00 89 1 2...

Page 66: ...onnector and check the continuity Start heating operation Replace four way valve S80 voltage at 180 280V with compressor on Four way valve coil resistance at Yes Yes Replace outdoor PCB Replace four way valve coil No Refer Figure 1 below No Fig 1 Voltage at S80 DC180 280V DC12 15V Compressor ON Time Four way valve coil RROLQJ U 1R continuity HDWLQJ RQWLQXLty ...

Page 67: ...ance at a Yes Yes Replace outdoor PCB Replace four way valve coil No Four way valve coil Cooling Dry No continuity Heating Continuity Refer Figure 1 below No Fig 1 Voltage at S80 220 240 VAC Compressor ON Time 6 4 Inverter unit refrigerant check procedures Check for refrigerant leakage See troubleshooting for U0 error Refrigerant system check Is the discharge pipe thermistor disconnected from the ...

Page 68: ...the power module as below i Disconnect compressor harness connector from outdoor PCB ii Follow table below to measure resistance between or power module terminal or diode bridge and the U V or W terminal of compressor with a multimeter Evaluate the measurement results referring to following table Negative terminal of multimeter Power module or Diode bridge UVW Power module or Diode bridge UVW Posi...

Page 69: ...30 V is applied 1 Set operation off and power off Disconnect the connector S70 2 Check that the voltage between the pins 4 7 is 320 VDC 3 Check that the control voltage between the pins 3 4 is 15 VDC 4 Check that the rotation command voltage between the pins 2 4 is 0 6 5 VDC 5 Keep operation off and power off Connect the connector S70 6 Check whether 4 pulses 0 15 VDC are output at the pins 1 4 wh...

Page 70: ...emperature The outdoor temperature should be within the operation range Is the airflow blocked by obstacles or winds blowing in the opposite direction No Change the installation location direction or remove obstacles Change the installation location direction or remove obstacles 6 8 Outdoor fan system check Outdoor fan running No DC motor Yes No Fan motor lead wire connector disconnected Refer to ...

Page 71: ... positive terminal for digital tester Power transistor UVW Power transistor UVW Positive terminal of tester negative terminal for digital tester UVW Power transistor UVW Power transistor Normal resistance Several kΩ to several MΩ Unacceptable resistance Short 0Ω or open 6 9 2 Main circuit short check for RXN50 60M Check to make sure that the voltage between and of the diode bridge DB1 is approxima...

Page 72: ...y waveform is a sine wave Fig 1 Check if there is waveform disturbance near the zero cross sections circled in Fig 2 Fig 1 Fig 2 R1726 R1444 6 11 Retrived parameter using D checker cable and software Only applicable for ARXN RXN25 35 50 60M RXB50 60B D checker cable and software needed to enable connection to outdoor unit Malfunction code and other operation data are display as shown below D Check...

Page 73: ...Product manufactured in an ISO certified facility This document contains the most current information as of this orienting For the most up to date product information please go to www daikin oyl com my ...

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