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Service Manual
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Page 9: ...0 1 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 80 11 10 9 8 7 6 5 4 3 2 1 0 Compressor speed rps Current A 11 10 9 8 7 6 5 4 3 2 1 0 Compressor speed rps Current A Conditions Indoor DB27 C WB19 C Outdoor...
Page 10: ...0 20 40 60 80 100 120 15 10 5 0 5 10 Capacity ratio Condition Indoor DB20 C Indoor air flow Super High Pipe length 7 5m Outdoor temp C HDWLQJ RROLQJ 8QLW 32 33 34 35 36 37 38 39 43 15 10 5 0 5 7 10 4...
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Page 14: ...unit COOLING HEATING 4 Way valve Discharge Suction Heat exchanger evaporator Heat exchanger condenser Valve Valve Liquid pipe side Gas pipe side Strainer Strainer Electron expansion valve 8QLW 8QLW In...
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Page 16: ...ironshellmotor groundonly EKV CN1 4V WARNING Please don t touch any terminal when AP2 is higher than 30V to prevent the risk of electrical shock the voltage of terminal DC and DC at ELECTRICAL BOX OVE...
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Page 28: ...cm At least 15cm At least 250cm Space to the wall S p a c e t o t h e o b s t r u c t i o n r o o l f e h t o t e c a p S Space to the obstruction Drainage pipe Space to the wall Space to the obstruct...
Page 29: ...r unit Make the bound pipes pass through the wall hole and then connect outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installati...
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Page 45: ...he voltage testing circuit on control panel AP1 Replace the control panel AP1 Measure the AC voltage between terminalL andN on wiring board XT power supply Voltage within 210VAC 250VAC Shut down the p...
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Page 47: ...tage between the two ends of capacitor C2 until the voltage is lower than 20V Replace the capacitor C2 Then energize and start the unit Replace the control panel AP1 Take corrective actions according...
Page 48: ...erature protection Is outdoor ambient temperature higher than 53 20 minutes after the complete unit is powered off Is heat dissipation of the indoor unit and outdoor unit abnormal Normal protection pl...
Page 49: ...FRPSUHVVRU VWRSSLQJ HQRXJK DXOW GLDJQRVLV SURFHVV Y N Y N N Y Y N Power on the unit Is stop time of the compressor longer than 3 minutes Restart it up after 3 minutes Does startup fail Are the wires f...
Page 50: ...for the compressor connected correctly Is connection sequence right Is the connection made in clockwise direction Connect the wires correctly Replace the control panel AP1 If the fault is eliminated...
Page 51: ...0 minutes after the complete unit is powered off Is the terminal FA for the electronic expansion valve connected correctly Connect the wires correctly Resistances between the first four pins close to...
Page 52: ...e or short circuit Replace it as per the wiring diagram and reconnect the wires If the fault is eliminated Remove the PFC capacitor and measure resistance between the two terminals Is the resistance a...
Page 53: ...perate normally before the failure occurs The AP1 voltage detection circuit is at fault Check wiring inside of the indoor and outdoor units Are wires broken Check the communication circuit of the outd...
Page 54: ...e power supply to restore the range 210VAC 250VAC N power on and restart the unit If the fault is eliminated Shut down the power and wait 20n muties or use DC voltmeter to measure the voltage on the t...
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Page 56: ...he control panel AP1 N N Y Y Y Please confirm 1 If the indoor and outdoor heat exchangers are dirty If they are obstructed by other objects which affect the heat exchange of indoor and outdoor unit 2...
Page 57: ...and outdoor fan work well De energize the unit and wait for 20min Replace the control board replace the outdoor control board in cooling mode replace the indoor control board in heating mode If the ra...
Page 58: ...ssor wire COMP UVW is well connected and connection sequence is correct Replace control board AP1 If the stop time of compressor is more than 3min N If the stop time is not enough and the high and low...
Page 59: ...outdoor fan works normally If the stop time of compressor is more than 3min End Synchronism after energize the unit and start it Connect wire well Synchronism occurred during operation Replace control...
Page 60: ...heck if the expansion valve is blocked If the wiring terminal FA of electron expansion is well connected Remove malfunction Remove malfunction Check if the coil of electron expansion is installed on t...
Page 61: ...it of outdoor unit Problem of communication circuit Check if the controller connection wire inside indoor and outdoor electric box is loose Connection correct Connect wire of indoor and outdoor unit a...
Page 62: ...diagram with voltage meter Number jumping Number jumping Number jumping Number jumping Outdoor unit malfunction Test voltage value of Test 13 position in diagram with voltage meter Test voltage value...
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