LG PAHCMS000 Service Manual page 15

[Error Code (Outdoor Unit)]
• This page is about outdoor error code. It can vary depending on outdoor unit. For more information, please
refer to the outdoor unit manual.
Display
Outdoor unit Inverter Compressor IPM
2 1 1
Fault
Inverter Board Input Over Current(RMS) of
2 2 1
Outdoor Unit
Outdoor unit Inverter Compressor DC link
2 3 1
Low Voltage
2 4 1 Outdoor unit High Pressure Switch
Outdoor unit Input Voltage High/ Low
2 5 1
Voltage
Outdoor unit Inverter Compressor Start
2 6 1
Failure
2 8 1 Outdoor unit Inverter DC link High Voltage
Outdoor unit Inverter Compressor Over
2 9 1
Current
Outdoor unit Constant Speed Compressor2
3 0 1
High Discharge Temperature
Outdoor unit Inverter Compressor High
3 2 1
Discharge Temperature
Outdoor unit Constant Speed Compressor1
3 3 1
High Discharge Temperature
3 4 1 High Pressure of Outdoor Unit
3 5 1 Low Pressure of Outdoor unit
3 6 1 Outdoor unit Low Condensing Ratio Limited
Outdoor unit Inverter Compressor CT
4 0 1
Sensor Fault
Outdoor unit Inverter Compressor
4 1 1
Discharge Temperature Sensor Fault
4 2 1 Outdoor unit Low Pressure Sensor Fault
4 3 1 Outdoor unit High Pressure Sensor Fault
4 4 1 Outdoor unit Air Temperature Sensor Fault
Outdoor unit Heat Exchanger Temperature
4 5 1
Sensor (Front side) Fault
Outdoor unit Suction Temperature Sensor
4 6 1
Fault
Title
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Cause of Error
Outdoor unit Inverter Compressor Drive IPM Fault
Outdoor unit Inverter Board Input Current excess (RMS)
DC charging is not performed at Outdoor unit after starting
relay turn on.
System is turned off by Outdoor unit high pressure switch.
Outdoor unit input voltage is over 487V or below 270V
The First Start Failure by Outdoor unit Inverter
Compressor Abnormality
System is turned off by Outdoor unit DC Voltage Over
Charging
Outdoor unit Inverter Compressor Fault OR Drive Fault
System is turned off by Outdoor Uunit Constant Speed
Compressor2 High Discharge Temperature
System is turned off by Outdoor unit Inverter Compressor
High Discharge Temperature
System is turned off by Outdoor Uunit Constant Speed
Compressor1 High Discharge Temperature
System is turned off by excessive increase of high pressure
of Outdoor unit
System is turned off by excessive decrease of low pressure
of Outdoor unit
Outdoor unit stayed under low condensing limit for 3 minutes
Outdoor unit Inverter Compressor CT Sensor open or short
Outdoor unit Inverter Compressor Discharge Temperature
Sensor open or short
Outdoor unit Low Pressure Sensor open or short
Outdoor unit High Pressure Sensor open or short
Outdoor unit Air Temperature Sensor open or short
Outdoor unit Heat Exchanger Temperature Sensor(Front
side) open or short
Outdoor unit Suction Temperature Sensor open or short
Troubleshooting