LG LFCS22520 Series Service Manual

B3. LED blinks five times, then repeats (Locked Piston: A & E Inverters)
Protection Logic
Protection Logic
Blink Blink Blink Blink Blink OFF
Protection
logic
Check B
Blink 5 times
(Lock Piston Trip) Check B3
Compressor
Doesn’t work
Repeat
Check Procedure
Reset
Power
Compressor
Doesn’t work
N
Y
Replace
Compressor
Hi side
restriction
N
Y
Sealed
system
Repair
- Purpose: To detect locked piston
- Cause: Lack of oil to the cylinder, cylinder or piston damaged and or restricted discharge.
A Locked Piston can also be caused by foreign materials inside the compressor.
- Logic: Compressor is forced off and tries to restart within 2.5 minutes.
B4. 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 B4
Compressor
Intermittently
works
Y
Capacitor
Spec.
Check C2
Compressor
Damage
Check C3
Replace
Capacitor
Replace
Compressor
NG
NG
Reset
Power
Y
Current trip
Occur?
Y
Repeat
Check Procedure
IPM
Check B5
Y
Replace
Driver PCB
NG
N
Y
N
Cycle
Check E
Y
Fix
Cycle
- 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.
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LG LFCS22520 Series Specifications

General

Brand	LG
Model	LFCS22520 Series
Category	Refrigerator
Language	English