Self-Diagnosis Function - LG multi v Installation Manual

TEST RUN
90

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-seg-
ment 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.
(* = 1:Master, 2:Slave 1, 3:Slave 2)
Ex)
Error No.
* Refer to the DX-Venitilation manual for DX-Venitilation error code.
Display
0 1 - Air temperature sensor of indoor unit
Inlet pipe temperature sensor of indoor
0 2 -
unit
Communication error : wired remote
0 3 -
controller ÷ indoor unit
0 4 - Drain pump
Communication error : outdoor unit ÷
0 5 -
indoor unit
Outlet pipe temperature sensor of indoor
0 6 -
unit
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
1 7 - Inlet Air temperature sensor of FAU
Master Outdoor Unit Inverter Compressor
2 1 *
IPM Fault
Inverter Board Input Over Current(RMS) of
2 2 *
Master Outdoor Unit
Master Outdoor Unit Inverter Com-
2 3 *
pressor DC link Low Voltage
Master Outdoor Unit High Pressure
2 4 *
Switch
Master Outdoor Unit Input Voltage
2 5 *
High/ Low Voltage
Master Outdoor Unit Inverter Com-
2 6 *
pressor Start Failure
Repeat
Error No. of Unit
Error No. of Compressor
Title Cause of Error
Air temperature sensor of indoor unit is open or short
Inlet pipe temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in indoor
unit PCB
Malfunction of drain pump
Failing to receive outdoor unit signal in indoor unit PCB
Outlet pipe temperature sensor of indoor unit is open or
short
In case when the serial number marked on EEPROM of
Indoor unit is 0 or FFFFFF
Disconnecting the fan motor connector/Failure of indoor
fan motor lock
Air temperature sensor of indoor unit is open or short
Master Outdoor Unit Inverter Compressor Drive IPM Fault
Master Outdoor Unit Inverter Board Input Current excess
(RMS)
DC charging is not performed at Master Outdoor
Unit after starting relay turn on.
System is turned off by Master Outdoor Unit
high pressure switch.
Master Outdoor Unit input voltage is over 373V
or below 776V(ARUB***CTE4)
The First Start Failure by Master Outdoor Unit In-
verter Compressor Abnormality