LG ARUV Series Service Manual page 273

Error No. Error Type
100,101 (Sub1)
Over-increase of constant
102,103 (Sub2)
compressor discharge tem-
perature of Sub outdoor
152,153 (Sub3)
Error No. Error Type
104 (Main)
111 (Sub1)
Transmission error of out-
door each other
142 (Sub2)
156 (Sub3)
Error diagnosis and countermeasure flow chart
Does transmission LED
(Red) of corresponding
Sub PCB blinks? [refer electric
component part]
Yes
Is transmission cables
of outdoors connected
correctly? [refer electric
component part]
Yes
Replace MAIN PCB
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Error Point
Compressor is off because of
Over-increase of constant com-
pressor discharge temperature of
Sub outdoor unit
Error Point
Transmission error of outdoor unit
each other
104: Main outdoor unit can't receive
signal from Sub 1
111, 142, 156 : each Sub outdoor
Is PCB input power of
No
transformer, PCB power fuse
normal? [refer electric
component part]
Yes
Replace related SUB PCB
No
Re-connect transmission cables
- 273 -
Refer to CH33
1. Loose connection of power cables
/transmission cables (Open/Short)
2. Defect of each outdoor unit PCB
3. Defect of PCB power fuse / trans-
unit can't receive
former
signal from Main
outdoor unit
Check and replace
No
corresponding parts/
Input power
Troubleshooting Guide
Main Reasons
Main Reasons
LGE Internal Use Only