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.
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...
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 ☆...
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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 ●...
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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 ●...
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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.
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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 ●...
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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 ●...
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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”...
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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.
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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...
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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;...
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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 ●...
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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 ●...
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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;...
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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...
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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...
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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”...
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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...
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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.
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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.
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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...
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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...
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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.
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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.
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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.
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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.
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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.
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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...
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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.
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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.
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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...
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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.
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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.
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compressor on bottom plate. ③ Lift the compressor from the base pan assembly.
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