LG GB7143**AV Series Service Manual page 19

3) LED blinks two times, then repeats (Stroke Trip)
Purpose: Prevent abnormally long piston strokes.
Case 1. If compressor doesn't work and LED blinks
- Cause: Possibly harness from compressor to PCB might be defective.
Case 2. If compressor works intermittently and LED blinks
- Cause: Condenser Fan or Freezer Fan is not running. Sealed system problem such as moisture restriction, restriction at
capillary tube or refrigerant leak.
Logic: Compressor is forced to off and then tries to restart after 1 minute.
Protection Blink 2 times
logic (Stroke Trip)
Check B Check B2
Compressor
Doesn t work
Replace
Driver PCB
OK
Cycle
Fix
Check E
Cycle
NG
N
Repeat
Check Procedure
N
Harness
Y
Connecting
Check C
N
Compressor
Works
Intermittently
Y
Reset
Stroke Trip
Power
Occur?
Fix Harness
Y
Y
Capacitor
Check C
Compressor
Damage
Check C
- 19 -
N
Replace
Spec.
Capacitor
Y
N
Replace
Compressor
Y