LG LMXS30776S - Page 98

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B6. LED blinks seven times, then repeats
FFOknilBknilBknilBknilBknilBknilBknilB
Protection
logic
Check B
Blink 7 times
(Lock Piston Trip) Check B5
Compressor
Doesn’t work
Y
N
Repeat
Check Procedure
Replace
Drive PCB
N
Y
Check IPM
visual inspection
(turn off)
Short
Test
Point A
Power
Reset
Compressor
Damage
Check C3
Replace
Compressor
NG
Y
Modify
-Purpose: Prevent high current due to IPM Short
-Cause: Damaged IPM (Dea d Short)
-Test for a dead short at Point Awith a VOM.
-Logic: Compressor is forced off and tries to re start in 20 seconds.
A
B7.LED Blinks eight times, then repeats (Communication Error)
FFOBlink Blink knilBknilBknilBknilBknilBknilB
Protection
logic
Check
blink 8 times
(Communication Error)check B7
Check Comp. Starting
when C-fan doesn’t work
Y
N
Reset
Power
-Purpose: To detect Se t control Micom and communicati on error
-Cause: Communication Error
-Logic: LED blink.(C om pressor runs refe rence va lue be fore occurring communicati on Error)
1. Check Temp. &
Sound Pres sure of
Comp and D-pipe
2. Check whether or
not C-Fan Works
Replace Driver PCB
Repeat
Check Procedure