LG MULTI V M ARNU07GTU 4 Series Svc Manual page 75

Error
Error Type
No.
Over-Capacity
(Sum of indoor unit
511
capacity is more than
outdoor capacity)
n Error diagnosis and countermeasure flow chart
Is capacity sum of
indoor units less than
130% of Compressor module
capacity at LGMV?
Yes
End
Error Point
Sum of indoor unit
capacity exceed
Compressor Module
capacity specification
Are quantity and capacity
No
of indoor units installed
same as the data of LGMV?
Yes
Adjust the capacity of indoor
and Compressor module
1. 130% more than Compressor Module rated
capacity
2. Wrong connection of transmission
cable/piping
3. Detect ot Compressor Module PCB
Check communication cables
No
between indoor and
Compressor module
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