LG ARUN Series Service Manual page 82

Troubleshooting Guide
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
I Error diagnosis and countermeasure flow chart
Is operation mode of
outdoor & Indoor units
same?
Yes
Adjust outdoor main PCB
dip switch setting *
* 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.
o Dip switch Setting o
ON
1 2 3 4 5 6 7
1 2 3 4 5 6 7
ON
1 2 3 4 5 6 7
1 2 3 4 5 6 7
*** 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.
Copyright ©2007 LG Electronics. Inc. All right reserved.
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.
Does error code
No
disappear
after set operation
mode same?**
Yes
ON
1 2 3 4 5 6 7
8 9 10 11 12 13 14
ON
1 2 3 4 5 6 7
8 9 10 11 12 13 14
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.
Refer to CH02
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.
No
END
- 82 -
Main Reasons
Main Reasons
Replace Indoor PCB***
LGE Internal Use Only