LG MULTI V M ARNU07GTU 4 Series Svc Manual page 50

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