LG MULTI V IV ARNU07GTU 2 Series - Page 126

Troubleshooting Guide
- 126 -
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1.Loose connection of power cable/ communi-
cation cable¸(Open/Short)
2.Defect of each outdoor unit PCB
Error No. Error Type Error Point Main Reasons
Master displays ODU number
which is not communicated.
Slave displays own error number
Communication
Error Between
Outdoors
104*
Master
1041
Slave1
1042
Slave2
1043
Slave3
1044
n Error Diagnosis and Countermeasure Flow Chart
Is communication
cable installed
normally?
Connect communication cable
Yes
No
Is Slave Unit Dip SW
setting done?
Yes
Dip SW setting
No
Is Main PCB power
supplied?
Yes
Connect power cable
No
Replace Main PCB