LG MULTI V IV PRO ARUN080LLH4 Installation Manual page 77

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,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 in-
0 2 -
door 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 in-
0 6 -
door unit
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
Master Outdoor Unit Inverter Com-
1
pressor IPM Fault
Slave1 Outdoor Unit Inverter Com-
2 1 2
pressor IPM Fault
Slave2 Outdoor Unit Inverter Com-
3
pressor IPM Fault
Inverter Board Input Over Current
1
(RMS) of Master Outdoor Unit
Inverter Board Input Over Current
2 2 2
(RMS) of Slave1 Outdoor Unit
Inverter Board Input Over Current
3
(RMS) of Slave2 Outdoor Unit
* 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 EEP-
ROM of Indoor unit is 0 or FFFFFF
Disconnecting the fan motor connector/Failure of in-
door fan motor lock
Master Outdoor Unit Inverter Compressor Drive
IPM Fault
Slave1 Outdoor Unit Inverter Compressor Drive
IPM Fault
Slave2 Outdoor Unit Inverter Compressor Drive
IPM Fault
Master Outdoor Unit Inverter Board Input Current
excess (RMS)
Slave1 Outdoor Unit Inverter Board Input Current
excess (RMS)
Slave2 Outdoor Unit Inverter Board Input Current
excess (RMS)
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