LG LFXS29626 series - Page 79

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B6. LED blinks seven times, then repeats
Protection Logic
Blink BlinkBlink Blink Blink Blink Blink OFF
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 (Dead Short)
- Test for a dead short at Point A with a VOM.
- Logic: Compressor is forced off and tries to restart in 20 seconds.
A
Protection Logic
B5. LED blinks six times, then repeats (Current Trip: A & E-Inverters)
Blink Blink Blink Blink Blink Blink OFF
Protection
logic
Check B
Blink 6 time
(Current Trip) Check B5
Compressor
Intermittently
works
Compressor
Damage
Check
Replace
Compressor
Replace
Compressor
Sealed System
Repair
N
Reset
Power
Y
IPM Check
Y
Replace
Driver PCB
N
N
Current trip
occur?
Repeat
Check Procedure
Y
Compressor
Doesn’t works
Cycle blockage?
Y
Y
Cycle check
Y
N
N
N
- Purpose: Prevent over-current (overload protect)
- Cause: Ambient temperature is high (over 43°C) and/or refrigerator’s condenser air movement is restricted.
- Condenser Fan is stopped, restricted discharge line, compressor is damaged, or IPM device is defective.
- Logic: Compressor is forced off and tries to restart after 6 minutes.