LG LBC24360ST Service Manual - Page 46

B3. LED blinks five times, then repeats (Locked Piston: A & E Inverters) Protection Logic 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 Check B Blink 5 times (Lock Piston Trip) Check B3 Compressor Doesn't work Reset Power Y Compressor Doesn't work N Repeat Check Procedure Replace Compressor N Hi side restriction Y Sealed system Repair B4. LED blinks six times, then repeats (Current Trip: A & E-Inverters) Protection Logic Blink Blink Blink Blink Blink Blink OFF - 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 logic Check B Blink 6 time (Current Trip) Check B4 Compressor Y Intermittently works N Fix Cycle Y Cycle Check E Replace NG Driver PCB Y IPM Check B5 Y Capacitor Spec. Check C2 Y NG Replace Capacitor Repeat N Check Procedure Current trip Occur? Reset Power Compressor Damage Check C3 Y NG Replace Compressor 46