LG Multi V ARWM072CAS5 Service Manual page 140

Self-diagnosis function
Error No. Error Type
104*
Master
Communication
1041
Slave1 Error Between
1042
Outdoors
Slave2
1043
n 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
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
1.Loose connection of power cable/ com-
munication cable¸(Open/Short)
2.Defect of each outdoor unit PCB
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Main Reasons