LG Multi V Water IV ARNU07GTU 2 Series Service Manual page 69

Error
Error Type
No.
All Indoor units are not
07 running in same mode
■ Error diagnosis and countermeasure flow chart
Is operation mode of
outside & Indoor units same?
Yes
Adjust outside main PCB
dip switch setting
Error
Error Type
No.
Indoor unit EEPROM
09
error
■ Error diagnosis and countermeasure flow chart
- Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control
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Error Point
The Indoor units started
later are operated in differ-
ent mode from earlier one.
Does error code disappear
No
after set operation
mode same?
Yes
END
Error Point
Error occur in EEPROM
of the Indoor PCB
- 69 -
Troubleshooting Guide
Main Reasons
1. Indoor units are in different mode
2. PCB fault
3. cabled remote controller fault
Checking ch07 method
IDU doesn't operate as Operation mode is flicker-
ing at IDU wired remote controller and IDU display
window.
No
Replace Indoor
PCB
Main Reasons
1. Error developed in communication between the
micro- processor and the EEPROM on the sur-
face of the PCB.
2. ERROR due to the EEPROM damage
LGE Internal Use Only