Self-diagnosis function
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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
06
Refer to CH02
Error
No. Error Type Error Point Main Reasons
Indoor unit outlet pipe
temperature sensor open
or short
Indoor unit outlet pipe
temperature sensor
error
07
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
flickering at IDU wired remote controller and IDU
display window.
Error
No. Error Type Error Point Main Reasons
The Indoor units started
later are operated in dif-
ferent mode from earlier
one.
All Indoor units are not
running in same mode
■Error diagnosis and countermeasure flow chart
* Check mode selection setting of wired remote controller.
** Outdoor main PCB dip switch no.5 (Cooling) or no.6 (heating) is in On, different mode operation error
may occur because the operation mode is fixed by dip switch setting.
♦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.
The error code will be removed automatically after few seconds.
With cableless remote controller: Turn off indoor unit, and then turn on by changing the operation
mode. The error will disappear.
Is operation mode of
outdoor & Indoor units
same?
Adjust outdoor main PCB
dip switch setting *
Yes
No
END
Does error code
disappear
after set operation
mode same?**
Replace Indoor PCB***
No
Yes
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 1011121314
1234567
ON
1234567
ON
1 2 3 4 5 6 7 8 9 1011121314