LG ARUB230BT2 Installation Manual page 75

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 LED of 7-segment indicates error number, 3rd LED indicates unit number.
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave
011 ¡ 051 : No.105 error of master unit
Display
0 1 -
Air temperature sensor of indoor unit
0 2 - Inlet pipe temperature sensor of indoor unit
Communication error : wired
0 3 -
remote controller ↔ indoor unit
0 4 -
Drain pump
Communication error : outdoor
0 5 -
unit ↔ indoor unit
Outlet pipe temperature sensor of
0 6 -
indoor unit
Different operation mode
0 7 -
0 9 -
Serial No.
1 0 -
Poor fan motor operation
Communication error: indoor unit
1 1 -
¡ main PCB of outdoor.
Master Outdoor Unit Inverter
1
Compressor IPM Fault
2 1
slave Outdoor Unit Inverter
2
Compressor IPM Fault
Inverter Board Input Over
1
Current(RMS) of Master Outdoor
Unit
2 2
Inverter Board Input Over
2 Current(RMS) of slave Outdoor
Unit
Master Outdoor Unit Inverter
1
Compressor DC link Low Voltage
2 3
slave Outdoor Unit Inverter
2
Compressor DC link Low Voltage
Master Outdoor Unit High
1
Pressure Switch
2 4
slave Outdoor Unit High Pressure
2
Switch
Title
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
Operation mode between indoor unit and outdoor unit
is different
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
When the addressing signal doesn't respond for 3mins. suddenly,
while the indoor unit gets the calling signal from the outdoor unit,
Master Outdoor Unit Inverter Compressor Drive IPM Fault
slave Outdoor Unit Inverter Compressor Drive IPM Fault
Master Outdoor Unit Inverter Board Input Current
excess (RMS)
slave Outdoor Unit Inverter Board Input Current excess
(RMS)
DC charging is not performed at Master outdoor unit
after starting relay turn on.
DC charging is not performed at slave outdoor unit
after starting relay turn on.
System is turned off by Master outdoor unit high pres-
sure switch.
System is turned off by slave outdoor unit high pres-
sure switch.
Test Run
Cause of Error
Installation Manual 75