LG ARUV Series Service Manual page 251

Error
Error Type
No.
Indoor unit outlet pipe
06
temperature sensor
error
Error
Error Type
No.
All Indoor units are not
07
running in same mode
Error diagnosis and countermeasure flow chart
Is operation mode of
outdoor & Indoor units
same?
Yes
Adjust outdoor main PCB
dip switch setting *
* Outdoor main PCB dip switch no.5 (Cooling) or no.6 (heating) is in On, different mode operation error
may be occurred because the operation mode is fixed by dip switch setting.
** Dissolution method CH07 with remote controller
1) Error removal method : Turn off remote controller by pressing the On/Off button on the cabled remote controller.
2) Immediately change the operation mode after the pressing the On/Off button .
The same operation mode as in the indoor unit started at first other than the defective unit mode (heating /cooling)
*** After replacing the indoor unit PCB, it should be done to do Auto addressing and input the address of central control
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 do Auto addressing and input the address of central control
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Only for training and service purposes
Error Point
Indoor unit outlet pipe
temperature sensor open
or short
Error Point
The Indoor units started
later are operated in dif-
ferent mode from earlier
one.
Is error code
No
disappeared
after set operation
mode same?**
Yes
The error code will be removed automatically after a few seconds.
With cableless remote controller: Turn off indoor unit, and turn on with the other operation mode
the error will disappeared
Error Point
Problem in EEPROM
inside Indoor PCB ASS'Y
EEPROM
Refer to CH02
1. Indoor units are in different mode
2. PCB fault
3. cabled remote controller fault
No
END
1. Error developed in transmission between the
micro- processor and the EEPROM on the sur-
face of the PCB.
2. ERROR due to the EEPROM damage
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Troubleshooting Guide
Main Reasons
Main Reasons
Replace Indoor PCB***
Main Reasons
LGE Internal Use Only