LG ARUN Series Service Manual page 125

Error No. Error Type
104*
Master
Transmission Error
11 ¡ 041
Between Outdoors
Slave
12 ¡ 042
I Error Diagnosis and Countermeasure Flow Chart
Is communication
cable installed
normally?
Yes
Is Slave Unit Dip SW
setting done?
Yes
Is main PCB power
supplied?
Yes
Replace main PCB
* Slave Unit Dip SW
ON
Slave
1 2 3
1 2 3
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error Point
Master displays ODU number
which is not communicated.
Slave displays own error number
No
Connect communication cable
No
Dip SW setting
No
Connect power cable
ON
4 5 6 7 1 2
4 5 6 7 8 9 10 11 12 13 14
1.Loose connection of power cable/communi-
cation cable(Open/Short)
2.Defect of each outdoor unit PCB
3 4 5 6
- 125 -
Troubleshooting Guide
Main Reasons
LGE Internal Use Only