LG Multi V Service Manual

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All rights reserved. Only training and service purposes.
Self-diagnosis function
3. Self-diagnosis function
Error Indicator
- This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
- Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of
outdoor unit control board as shown in the table.
- If more than two troubles occur simultaneously, lower number of error code is first displayed.
- After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
1st,2nd,3rd LED of 7-segment indicates error number, 4th LED indicates unit number.
Ex)
No. of Error Compressor
Error No.
No. of Error Unit
Repeat
Display Title Cause of Error
Indoor unit related error
0 1 Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short
0 2 Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short
0 3
Communication error : wired remote
controller ↔ indoor unit
Failing to receive wired remote controller signal in indoor unit
PCB
0 4 Drain pump Malfunction of drain pump
0 5
Communication error : outdoor unit ↔
indoor unit
Failing to receive outdoor unit signal in indoor unit PCB
0 6 Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short
0 9 Indoor EEPROM Error
In case when the serial number marked on EEPROM of
Indoor unit is 0 or FFFFFF
1 0 Poor fan motor operation
Disconnecting the fan motor connector/Failure of indoor fan
motor lock
Outdoor unit related error
2 1 Outdoor Unit Inverter Compressor IPM Fault Outdoor Unit Inverter Compressor Drive IPM Fault
2 2
Inverter Board Input Over Current(RMS)
of Outdoor Unit
Outdoor Unit Inverter Board Input Current excess (RMS)
2 3
Outdoor Unit Inverter Compressor DC link
Low Voltage
DC charging is not performed at Outdoor Unit after starting
relay turn on.
2 4 Outdoor Unit High Pressure Switch System is turned off by Outdoor Unit high pressure switch.
2 5 Outdoor Unit Input Voltage High/ Low Voltage Outdoor Unit input voltage is over 487 V or below 270 V
2 6
Outdoor Unit Inverter Compressor Start
Failure
The First Start Failure by Outdoor Unit Inverter Compressor
Abnormality
2 9
Outdoor Unit Inverter Compressor Over
Current
Outdoor Unit Inverter Compressor Fault OR Drive Fault
3 2
Outdoor Unit Inverter Compressor1 High
Discharge Temperature
Outdoor Unit Inverter Compressor1 High Discharge
Temperature
3 4 High Pressure of Outdoor Unit High Pressure of Outdoor Unit
3 5 Low Pressure of Outdoor Unit Low Pressure of Outdoor Unit

LG Multi V Specifications

General

Brand	LG
Model	Multi V
Category	Air Conditioner
Language	English