LG MULTI V 5 Manual Book page 40

Display Title
Outdoor Unit Inverter Compressor2 Discharge
4 7 *
Temperature Sensor Fault
4 9 *
Outdoor Unit Faulty IPM Temperature Sensor
Omitting connection of R, S, T power of
5 0 *
Outdoor Unit
5 1 * Excessive capacity of indoor units
Communication error : inverter PCB → Main
5 2 *
PCB
Communication error : indoor unit → Main
5 3 *
PCB of Outdoor Unit
Communication error : Main PCB → inverter
5 7 *
PCB
5 9 *
Mixing Installation of slave Outdoor Unit
Inverter PCB EEPROM Error of Master
6 0 *
Outdoor Unit
Outdoor Unit Inverter Heatsink High Tem-
6 2 *
perature
Outdoor Unit Inverter Heatsink Temperature
6 5 *
Sensor Fault
6 7 * Outdoor Unit Fan Lock
Inverter CT Sensor Error of Master Outdoor
7 1 *
Unit
7 5 * Outdoor Unit Fan CT Sensor Error
7 7 *
Outdoor Unit Fan Over Current Error
7 9 * Outdoor Unit Fan Start Failure Error
8 6 * Outdoor Unit Main PCB EEPROM Error
8 7 *
Outdoor Unit Fan PCB EEPROM Error
Communication Error Between Outdoor Unit
1 0 4 *
and Other Outdoor Unit
1 0 5 *
Outdoor Unit Fan PCB Communication Error
078
_TROUBLE SHOOTING GUIDE BOOK
Cause of Error
Outdoor Unit Inverter Compressor2 Discharge Tem-
perature Sensor open or short
Outdoor Unit IPM Temperature Sensor short/open
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
Mixing Installation of Old Slave Outdoor Unit and
New Slave 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
Inverter CT Sensor open or short of Outdoor Unit
Outdoor Unit Fan CT Sensor open or short
Outdoor Unit Fan Current is over 6A
The first start failure by Outdoor Unit Fan abnormality
or Fan locked
Communication Fail Between Outdoor Unit Main
MICOM and EEPROM or omitting EEPROM
Communication Fail Between Outdoor Unit Fan MICOM
and EEPROM or omitting EEPROM
Failing to receive Slave Unit signal at main PCB of
Outdoor Unit
Failing to receive fan signal at main PCB of Outdoor
unit
Display Title
1 0 6 * Outdoor Unit Fan IPM Fault Error
Outdoor Unit Fan DC Link Low Voltage
1 0 7 *
Error
Outdoor Unit Liquid pipe Temperature
1 1 3 *
Sensor Error
Outdoor Unit Subcooling Inlet Temperature
1 1 4 *
Sensor Error
Outdoor Unit Subcooling Outlet Temperature
1 1 5 *
Sensor Error
1 1 6 * Outdoor Unit Oil Level Sensor Error
Outdoor unit Main Board - External Board
1 4 5 *
communication Error
Outdoor Unit Discharge Superheat not
1 5 0 *
satisfied
Failure of operation mode conversion at
1 5 1 *
Outdoor Unit
Outdoor Unit Heat Exchanger Temperature
1 5 3 *
Sensor(upper part) Fault
Outdoor Unit Heat Exchanger Temperature
1 5 4 *
Sensor(lower part) Fault
Outdoor unit External Board Main-Sub
1 8 2 *
Micom communication Error
1 8 7 * Hydro - Kit P,HEX bursting error
Outdoor Unit Fan Heatsink High Tem-
1 9 3 *
perature
Outdoor Unit Fan Heatsink Temperature
1 9 4 *
Sensor Fault
0 5 1 C+#HR Excessive connection of indoor unit to
HR unit
Master Outdoor Unit Main PCB EEPROM
2 0 0 1
Error
2 0 1 C+#HR Master Outdoor Unit Fan PCB EEPROM
Error
2 0 2 C+#HR HR unit1 Sub Cooling Pipe sensor error
2 0 3 C+#HR HR unit1 Sub Cooling Pipe Out sensor error Sub Cooling Pipe Out sensor of HR unit. open or short
2 0 4 C+#HR Communication error
2 0 5 C+#HR Communication error between HR unit and
the upgraded 485 modem
2 0 6 C+#HR Duplicate address error of HR unit
2 4 2 * Network error of cntral controller
C: HR unit #: HR unit Number * : Unit( 1: Master, 2: Slave1, 3: Slave2, 4: Slave3)
Cause of Error
Instant Over Current at Outdoor Unit Fan IPM
Outdoor Unit Fan DC Link Input Voltage is under
380V
Liquid pipe temperature sensor of Outdoor Unit is
open or short
Outdoor Unit Subcooling Inlet Temperature Sensor
Error
Outdoor Unit Subcooling Outlet Temperature Sensor
Error
Oil Level Sensor of Outdoor Unit is open or short
Outdoor unit Main Board - External Board com-
munication Error
Outdoor Unit Compressor Discharge Superheat not
satisfied during 5 Min.
Failure of operation mode conversion at Outdoor Unit
Outdoor Unit Heat Exchanger Temperature Sensor
(upper part) Fault
Outdoor Unit Heat Exchanger Temperature
Sensor(lower part) open or short
Outdoor Unit Main Board Main-Sub Micom com-
munication failed
Inlet water temperature is below 5 degree or water
temperature error during defrosting operation.
System is turned off by Outdoor Unit Fan Heatsink
High Temperature
Outdoor Unit Fan Heatsink Temperature Sensor open
or short
Indoor unit capacity exceed
Communication Fail Between Master Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
Communication Fail Between Master Outdoor Unit
Fan MICOM and EEPROM or omitting EEPROM
Sub Cooling Pipe In sensor of HR unit open or
short
Failing to receive HR unit signal at outdoor unit
Failing to receive signal at HR unit PCB
Duplicated setting at the 4 series of HR unit
Communication wiring defect
079
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