Led Blinks Five Times, Then Repeats (Locked Piston: A & E Inverters); Led Blinks Six Times, Then Repeats (Current Trip: A & E-Inverters) - LG LFXC24726S Service Manual

B4. LED blinks five times, then repeats (Locked Piston: A & E Inverters)
Blink Blink Blink Blink Blink OFF
- 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.
Protection
logic
(Lock Piston Trip) Check B4
Check B
B5. LED blinks six times, then repeats (Current Trip: A & E-Inverters)
Blink Blink Blink Blink Blink Blink
- 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.
Protection
Blink 6 time
logic
(Current Trip) Check B5
Check B
Repeat
Check Procedure
Blink 5 times
Compressor
Reset
Doesn't work Power
Repeat
Check Procedure
OFF
Compressor
Intermittently
works
N
Replace
IPM Check
Driver PCB
N
Current trip
Occur?
Y
Compressor
Doesn't work
N
Y
N
Y
Compressor
Damage
check
Y
Reset
Power
Y
Compressor
Cycle blockage?
Doesn't works
N
Cycle
Check
- 90 -
Protection Logic
Replace
Compressor
N
Y
Hi side
restriction
Y
Sealed
system
Repair
Protection Logic
N
Replace
Compressor
N
Replace
Compressor
Y
Sealed system
Repair