Self-Diagnosis Function - LG B70AWYN985 Installation Manual

Self-diagnosis function

Error Indicator
• This function indicates types of failure in self-diagnosis and occurrence of failure for air condi-
tion.
• 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.
※ 3
rd
LED : For single inverter comp. It should indicate only '1'
Ex) 211 : No.21 error of Outdoor unit
011 ' 051 : No.105 error of Outdoor unit
Display
Air temperature sensor of indoor
0 1 -
unit
Inlet pipe temperature sensor of
0 2 -
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
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
Outdoor Unit Inverter Compressor
2 1 1
IPM Fault
Inverter Board Input Over
2 2 1
Current(RMS) of Outdoor Unit
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
In case when the serial number marked on EEP-
ROM 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)
SETTING & TEST
Cause of Error
43