LG LFXS26973 series, Service Manual

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What to do per LED Blinking and Trip protection Logic
5. Lock Piston Trip and LED Blinking 5 times (Locked Piston)

Purpose : Detect locked piston.

Cause : Oil shortage of the cylinder, Cylinder or Piston damage, clogging the discharge, Comp. internal debris.

Logic : After the Comp. Off every 2 min 30 seconds restart Comp.
Blink OFF BlinkBlinkBlinkBlink
Check
the Protection Logic
Check the L/Piston or
LED blinking 5 times
(Locked Piston Trip)
Do not operate
Comp.?
Recheck
Reset
Do not operate
Comp.?
N
Y
Replace
Compressor
Clogging the Cycle?
N
Y
Repair
Sealed system
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