LG multi V PLUS, Service Manual

Page: 266 / 373

266 Trouble Shooting Guide
Self-diagnosis function
No
Check or replace
the indoor unit PCB
Check and replace
the indoor unit PCB.
Change the operation mode of
indoor unit to the same operation
mode of outdoor unit
Yes
Yes
Fault diagnosis and Trouble shooting guide
07
Failure Checking Method
Failure Checking Method
Different
operation
mode
between
indoor
units Where operating in different
operation mode from previously
operated indoor unit This error occurs if an indoor unit which is off
state is to operate in heating mode when one or
more indoor units are operated in cooling mode
and vice versa.
09
Indoor
unit
EEPROM
error Problems occur at EEPROM
within the indoor unit
°
Øs main
PCB assembly
• Occurrence of poor communication between
MICOM and EEPROM on the indoor unit main
PCB assembly.
• Occurrence when no serial No. data exist within
EEPROM.
Are both operation mode of the
indoor unit and that of the outdoor
unit same?
Change so that operation mode of
both the indoor unit and the outdoor
unit becomes same
Error
Item
Error Display
No.
Major Error Occurrence Cause Meaning
Error
Item
Error Display
No.
Major Error Occurrence Cause Meaning