Error Display - LG ARWB80LA2 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
outside 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 slave2
011 ¡ 051 : No.105 error of master unit
Display
number
0 1 - Air temperature sensor of indoor unit
0 2 - Inlet pipe temperature sensor of indoor unit
Transmission error : wired remote controller ↔
0 3 -
indoor unit
0 4 - Drain pump
- Transmission error : outside unit ↔ indoor unit
0 5
0 6 - Outlet pipe temperature sensor of indoor unit
0 7 - Different operation mode
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
Master outside unit inverter compressor IPM
2 1 1
fault
Slave1 outside unit inverter compressor IPM
2 1 2
fault
2 1 3 Slave2 outside unit inverter compressor IPM
fault
Master outside unit inverter compressor DC
2 3 1
link under-voltage
Slave1 outside unit inverter compressor DC
2 3 2
link under-voltage
Slave2 outside unit inverter compressor DC
2 3 3
link under-voltage
2 4 1 Master outside unit high pressure switch
2 4 2 Slave1 outside unit high pressure switch
2 4 3 Slave2 outside unit high pressure switch
Master outside unit input voltage over-volt-
2 5 1
age/under-voltage
Slave1 outside unit input voltage over-volt-
2 5 2
age/under-voltage
Slave2 outside unit input voltage over-volt-
2 5 3
age/under-voltage
Master outside unit inverter compressor opera-
2 6 1
tion failure error
Slave1 outside unit inverter compressor opera-
2 6 2
tion failure error
Error item
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 outside unit signal in indoor unit PCB
Outlet pipe temperature sensor of indoor unit is open or short
Operation mode between indoor unit and outside 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
Master outside unit inverter compressor drive IPM error
Slave1 outside unit inverter compressor drive IPM error
Slave2 outside unit inverter compressor drive IPM error
DC voltage is not charged after master outside unit operating relay is
turned on
DC voltage is not charged after slave1 outside unit operating relay is
turned on
DC voltage is not charged after slave2 outside unit operating relay is
turned on
Compressor maintenance by master outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of master outside unit
Compressor maintenance by slave1 outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of slave1 outside unit
Compressor maintenance by slave2 outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of slave2 outside unit
Master outside unit input voltage of 487V or above or 270V or less
Slave1 outside unit input voltage of 487V or above or 270V or less
Slave2 outside unit input voltage of 487V or above or 270V or less
Initial operation failure due to master outside unit inverter compressor
error
Initial operation failure due to slave1 outside unit inverter compressor
error
Test Run
Root cause of error
Installation Manual 77