Self-Diagnosis Function - LG Multi V ACRUN040LSS0 Installation Manual

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)
Error No.
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
0 6 -
indoor unit
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
Outdoor Unit Inverter Compressor IPM
2 1 1
Fault
Inverter Board Input Over
2 2 1
Current(RMS) of Outdoor Unit
Outdoor Unit Inverter Compressor DC
2 3 1
link Low Voltage
2 4 1 Outdoor Unit High Pressure Switch
Outdoor Unit Input Voltage High/ Low
2 5 1
Voltage
* Refer to the Indoor manual for some Indoor Error code.
Repeat
No. of Error Unit
No. of Error Compressor
Title
ELECTRICAL WIRING
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
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 487 V or below
270 V.
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