LG LXFS28596 Series, Service Manual

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What to do per LED Blinking and Trip protection Logic
6. Current Trip and LED Blinking 6 times (Current Trip)

Purpose : Protection Over-Current(Over-Load)

Cause : Abnormally ambient temperature(Over 43
℃
), Abnormally conditions like Shield machine room etc.
Condenser Fan failure, Comp. failure, PCB failure(IPM breakdown)
Oil shortage of the cylinder, Cylinder or Piston damage, clogging the discharge, Comp. internal debris.

Logic : After the Comp. Off every 6 minutes restart Comp.
Blink OF
F Blink Blink Blink Blink Blink
Check
the Protection Logic
Check the Current or
LED blinking 6 times
(Current Trip)
Compressor is operate
intermittently
Y
Check the
Compressor failure
Replace
Compressor
N
Reset
Y
Current trip
occur?
Check the
leakage and cycle
Recheck
Check the
PCB output
Y
Replace PCB
N
N
N
N
Y
Replace
Compressor
Repair
Sealed system
Y
Do not operate
Comp.?
Clogging the Cycle?
N
Y
7. IPM Fault Trip and LED Blinking 7 times (IPM Fault)

Purpose : Protection Over-Current by failure IPM(IPM short)

Cause : IPM Short and failure

Logic : After the Comp. Off every 20 seconds restart Comp.
Blink OFF Blink BlinkBlink BlinkBlinkBlink
LED
Blinking 7
times
Reset Replace PCB
LED
Blinking 7
times
8. Comp TX Error Trip and LED Blinking 8 times (Communication Error)

Purpose : Detection communication error with the Micom of the refrigerator control.

Cause : Communication Error

Logic : Only LED blinking without the Comp. Off
(Comp. is operate command before communication error)
Blink Blink BlinkBlink BlinkBlinkBlink OFF
Blink
LED
Blinking 8
times
Replace PCB
Reset
LED
Blinking 8
times