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Carrier 42QHF009DS seires Service Manual
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Carrier 42QHF009DS seires Service Manual

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SERVICE MANUAL

42QHF009DS*
42QHF012DS*
Indoor unit
42QHF018DS*
42QHF022DS*
38QUS009DS*
Outdoor unit
38QUS012DS*
38QUS018DS*
38QUS022DS*

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Summary of Contents for Carrier 42QHF009DS seires

  • Page 1: Service Manual

    SERVICE MANUAL 42QHF009DS* 42QHF012DS* Indoor unit 42QHF018DS* 42QHF022DS* 38QUS009DS* Outdoor unit 38QUS012DS* 38QUS018DS* 38QUS022DS*...
  • Page 2 INDEX PART1 GENERAL INFORMATION PART2 ELECTRICAL DIAGRAM PART3 TROUBLE SHOOTING PART4 PONIT CHECK PART5 DISASSEMBLY INSTRUCTION...

  • Page 3: General Information

    PART – 1 GENERAL INFORMATION...
  • Page 4 PRODUCT LINEUP...
  • Page 5 UNIT MODEL INDENTIFICATION...
  • Page 6 DIMENSIONS Model 42QHF009/12DS 42QHF018DS 42QHF022DS 1045...
  • Page 7 DIMENSIONS...
  • Page 8 DIMENSIONS Model 38QUS009DS 38QUS012/18DS 38QUS022DS...
  • Page 9 REFRIGENRANT CYCLE DIAGRAM INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE T3 Condenser temp. sensor CAPILIARY TUBE HEAT EXCHANGE HEAT (EVAPORATOR) T4 Ambient T1 Room temp. EXCHANGE temp. sensor sensor (CONDENSER) T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE Accumulator...

  • Page 10: Electrical Diagram

    PART – 2 ELECTRICAL DIAGRAM...
  • Page 11 WIRING DIAGRAM - 42QHF009/12/18/22DS...
  • Page 12 WIRING DIAGRAM – 38QUS009/12DS...
  • Page 13 WIRING DIAGRAM – 38QUS018DS...
  • Page 14 WIRING DIAGRAM – 38QUS022DS...

  • Page 15: Troubleshooting

    PART – 3 TROUBLE SHOOTING...

  • Page 16: Safety Caution

    SAFETY CAUTION Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.

  • Page 17: Error Code

    ERROR CODE Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature...

  • Page 18: Indoor Unit

    Indoor Unit Operation Timer Digital Led Status Remark lamp lamp Display ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 3 times Zero crossing signal detection error Only available for AC motor of high-wall Indoor fan speed has been out of control ☆...
  • Page 19 Trouble Shooting of Indoor Error Code 1 EEPROM parameter error diagnosis and solution (E0/F4) E0/F4 Error Code Malfunction decision Indoor or outdoor PCB main chip does not receive feedback from conditions EEPROM chip. Supposed causes Installation mistake ● PCB faulty ●...
  • Page 20 2 Indoor unit and outdoor unit communication protection error diagnosis and solution (E1) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during 110 conditions seconds and this condition happens four times continuously. Supposed causes Wiring mistake ●...
  • Page 21 3 Zero crossing detection error diagnosis and solution (E2) Power off, then restart the unit 2 minutes later Indoor main PCB is defective. Replace indoor main PCB. Only available for AC motor of high-wall.
  • Page 22 4 Fan speed has been out of control diagnosis and solution (E3/F5) E3/F5 Error Code Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, the unit conditions will stop and the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 23 5 Open circuit or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3) Error Code E4/E5/F1/F2/F3 Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED conditions will display the failure. Supposed causes Wiring mistake ●...
  • Page 24 6 Refrigerant Leakage Detection diagnosis and solution (EC) Error Code Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts conditions running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 ＜Tcool－2℃ does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC”...
  • Page 25 7 Water-level alarm malfunction diagnosis and solution Error Code Malfunction decision conditions If the sampling voltage is not 5V, the LED will display the failure. ● Wiring mistake Supposed causes ● Water-level switch faulty ● Water pump faulty ● Indoor PCB faulty Power off, then restart the unit 3 minutes Power off, then restart the unit 3 minutes later.
  • Page 26 8 Operation current protection (F0) Current protection of compressor Judge 1: Check whether the input current of the power supply wire is higher than max protection current value Check whether the refrigerant system is ok Judge 2: Check whether the outdoor ambient Stop the unit temperature is higher than...
  • Page 27 9 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0) Error Code Malfunction decision When the voltage signal that IPM send to compressor drive chip conditions is abnormal, the display LED will show “P0” and AC will turn off. Supposed causes Wiring mistake;...
  • Page 28 10 Over voltage or too low voltage protection diagnosis and solution (P1) Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Power supply problems. ● System leakage or block ●...
  • Page 29 11 High temperature protection of compressor top diagnosis and solution (P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Power supply problems. ● System leakage or block ● PCB faulty ●...
  • Page 30 12 Inverter compressor drive error diagnosis and solution (P4) Error Code Malfunction decision An abnormal inverter compressor drive is detected by a special conditions detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Supposed causes Wiring mistake;...
  • Page 31 APPENDIX 1 Temperature Sensor Resistance Value Table, B=4100K K Ohm K Ohm K Ohm K Ohm ℃ ℃ ℃ ℃ 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190 10.000 1.96532...
  • Page 32 APPENDIX 2 Compressor Discharge Temperature Sensor Resistance Value Table, B=3950K K Ohm K Ohm K Ohm K Ohm ℃ ℃ ℃ ℃ 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37 11.79 3.296 406.7 54.89...
  • Page 33 PART – 4 PONIT CHECK...
  • Page 34 PONIT CHECK Press the “LED DISPLAY” button of remote controller three times (“Swing button” for some remote controllers) and then press “AIR DIRECTION” button three times, the air conditioner will enter the “information enquiry” status. After that, press the “LED DISPLAY” button to enquiry the next one information and press the “AIR DIRECTION”...
  • Page 35 Indoor unit 0-FF For the detailed status 0 meaning, please consult with engineer Indoor unit 0-FF For the detailed status 1 meaning, please consult with engineer Outdoor unit 0-FF For the detailed status meaning, please consult with engineer Outdoor unit 0-FF For the detailed protection...

  • Page 36: Disassembly Instruction

    PART – 5 DISASSEMBLY INSTRUCTION...
  • Page 37 1. Indoor unit 42QHF009/12DS: Parts name Procedures Remarks Front panel How to remove the front panel. Pull the below side of the panel toward you and remove screw of the cover. Release the connector of the display ass’y. Release the two clips and ①1 screw then remove the panel.
  • Page 38 Electrical How to remove the electrical parts parts. ② Remove the front panel from procedure 1. Pull out the room temp. ③ sensor (T1). Remove the two screws for the ground connection. Remove the fixing screw. Pull out the coil temp. sensor.
  • Page 39 Evaporator How to remove the evaporator. After remove the electrical parts from procedure 2, disassemble the pipe holder ① at the rear side of the unit. Remove the screw on the evaporator at the fixed plate. ② Remove the two screws on the evaporator at the base ③...
  • Page 40 Fan motor How to remove the fan motor. and Fan Remove the front panel, electrical parts and evaporator following procedure 1-3. Remove the three screws and remove the fixing board of fan motor. ② Remove the fixing screw . Pull out the fan motor and ③...
  • Page 41 42QHF018DS: Parts name Procedures Remarks Front panel How to remove the front panel. Pull the below side of the panel toward you and remove screw of the cover. Release the connector of the display ass’y. Release the three clips ①1 screw and then remove the panel.
  • Page 42 Electrical How to remove the electrical parts parts. ② Remove the front panel from procedure 1. Pull out the room temp. ③ sensor (T1). Remove the two screws for the ground connection. Remove the fixing screw. Pull out the coil temp. sensor.
  • Page 43 Evaporator How to remove the evaporator. 1) After remove the electrical parts from procedure 2, disassemble the pipe holder ① at the rear side of the unit. 2) Remove the screw on the evaporator at the fixed plate. ② 3) Remove the two screws on the evaporator at the base bearing side.
  • Page 44 Fan motor How to remove the fan motor. and Fan Remove the front panel, electrical parts and evaporator following procedure 1-3 2) Remove the three screws and remove the fixing board of fan motor. ② Remove the fixing screw . 4) Pull out the fan motor and fan ass’y from the side direction.
  • Page 45 42QHF022DS Parts name Procedures Remarks Front panel How to remove the front panel. 1) Pull the below side of the panel toward you and remove screw of the cover. 2) Release the connector of the display ass’y. 3) Release the three clips and ①1 screw then remove the panel.
  • Page 46 sensor. 4) Remove the fixing screw. ⑤ ④ Remove the screw on the electronic control box cover. Pull out the fan motor connector and swing motor connector. Then remove the electronic control box. ⑤...
  • Page 47 Evaporator How to remove the evaporator. 1) After remove the electrical parts from procedure 2, disassemble the pipe holder at the rear side of the unit. ① 2) Remove the three screws on the evaporator at the fixed plate. ② 3) Remove the two screws on the evaporator at the base bearing side.
  • Page 48 Fan motor How to remove the fan motor. and Fan 1) Remove the front panel, electrical parts and evaporator following procedure 1-3. 2) Remove the four screws and remove the fixing board of fan motor. ② Remove the fixing screw . Pull out the fan motor and fan ass’y from the side direction.
  • Page 49 2 Outdoor units (38QUS009DS for example) Part name Procedures Remarks Panel plate How to remove the panel plate. Top cover Stop operation of the air conditioner and turn “OFF” the power breaker. Remove the top cover. (7 screws) Remove the front panel. (8 Front panel screws) Fan ass’y...
  • Page 50 ③ 4) Remove the four fixing screws. Remove the fan motor. ④ Electrical How to remove the electrical parts parts. 1) Perform work of item 1,2. 2) Remove the two fixing screws of wiring cover and the two fixing screws of wiring board.
  • Page 51 ③ Remove the wires connected with the reactor. ④ Remove the grounding wire. ⑤ Remove the two screws fixing the electronic control box. ⑥ Then remove the electrical parts. Compressor How to remove thecompressor. 1) Perform work of item1,2,3 ② 2) Remove the discharge pipe and suction pipe with a burner.
  • Page 52 compressor on bottom plate. ③ Lift the compressor from the base pan assembly.

This manual is also suitable for:

42qhf012ds series42qhf018ds series42qhf022ds series38qus009ds series38qus012ds series38qus018ds series ... Show all