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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Self-diagnosis function
3. Self-diagnosis function
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.
Display
Title
Cause of Error
0
0
0
0
0
0
0
0
1
1
1
2
3
4
5
6
7
9
0
1
2
2
2
2
2
1
2
3
4
5
3
3
3
3
2
3
4
5
Air temperature sensor of indoor unit
Inlet pipe temperature sensor of indoor unit
Transmission error : wired remote
controller
↔
indoor unit
Drain pump
Transmission error : outdoor unit
↔
indoor unit
Outlet pipe temperature sensor of
indoor unit
Different operation mode
Serial No.
Poor fan motor operation
Transmission error: indoor unit
→
main PCB of outdoor.
DC peak
Overcurrent of inverter comp.
Poor voltage charge for driving
INV compressor
High pressure switch of main out-
door unit
Low/Over voltage
Discharge temperature of main
outdoor unit (INV compressor)
Discharge temperature of main
outdoor unit (constant speed com-
pressor)
High pressure of main outdoor unit
Low pressure of main outdoor unit
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 at
indoor unit PCB
Malfunction of drain pump
Failing to receive outdoor unit signal at 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 the case that the serial number marked on
EEPROM of Indoor unit is 0 or FFFFFF
Disconnecting the fan motor connector/Failure or indoor fan motor lock
When the addressing signal doesn't come out for 3mins. suddenly, while
the indoor unit gets the calling signal coming from the outdoor unit,
IPM fault or overcurrent to compressor
Overcurrent flows to inverter compressor
DC charging is not performed after starting relay turn
on
System is off by high pressure switch
Input voltage is out of tolerable range.
System is off due to rising of INV compressor discharge
temperature
System is off due to rising of constant speed compres-
sor discharge temperature
System is off by excessive increase of high pressure of
main outdoor unit
System is off by excessive decrease of low pressure of
main outdoor unit
Indoor unit related error
Power related error
Compressor related error
Summary of Contents for ARNU07GB1G1
Page 338: ...P NO 3828A24006P FEBRUARY 2009 ...
