LG MULTI V Service Manual page 101

Display
Outdoor Unit Low Compression Ratio
3 6
Limited
Outdoor Unit Inverter Compressor CT
4 0
Sensor Fault
1 Outdoor Unit Inverter Compressor1
4
Discharge Temperature Sensor Fault
4 2 Outdoor Unit Low Pressure Sensor Fault
4 3 Outdoor Unit High Pressure Sensor Fault
4 4 Outdoor Unit Air Temperature Sensor Fault
5 Outdoor Unit Heat Exchanger Temperature
4
Sensor (Front side) Fault
6 Outdoor Unit Suction Temperature Sensor
4
Fault
Omitting connection of R, S, T power of
5 0
Outdoor Unit
5 1 Excessive capacity of indoor units
2 Communication error : inverter PCB → Main
5
PCB
3 Communication error : indoor unit → Main
5
PCB of Outdoor Unit
7 Communication error : Main PCB →
5
inverter PCB
0 Inverter PCB EEPROM Error of Outdoor
6
Unit
2 Outdoor Unit Inverter Heatsink High
6
Temperature
5 Outdoor Unit Inverter Heatsink Temperature
6
Sensor Fault
6 7 Outdoor Unit Fan Lock
7 1 Converter CT Sensor Error of Outdoor Unit
8 6 Outdoor Unit Main PCB EEPROM Error
Title
Outdoor Unit Low Compression Ratio Limited
Outdoor Unit Inverter Compressor CT Sensor open or short
Outdoor Unit Inverter Compressor Discharge Temperature
Sensor open or short
Outdoor Unit Low Pressure Sensor open or short
Outdoor Unit High Pressure Sensor open or short
Outdoor Unit Air Temperature Sensor open or short
Outdoor Unit Heat Exchanger Temperature Sensor(Front side)
open or short
Outdoor Unit Suction Temperature Sensor open or short
Omitting connection of outdoor unit
Excessive connection of indoor units compared to capacity of
Outdoor Unit
Failing to receive inverter signal at main PCB of Outdoor Unit
Failing to receive indoor unit signal at main PCB of Outdoor
Unit .
Failing to receive signal main PCB at inverter PCB of Outdoor
Unit
Access Error of Inverter PCB of Outdoor Unit
System is turned off by Outdoor Unit Inverter Heatsink High
Temperature
Outdoor Unit Inverter Heatsink Temperature Sensor open or
short
Restriction of Outdoor Unit
Converter CT Sensor Error of Outdoor Unit
Communication Fail Between Outdoor Unit Main MICOM and
EEPROM or omitting EEPROM
- 101 -
Self-diagnosis function
Cause of Error
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