LG LMX25964 Series Service Manual page 55

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
B,lnkStlmes I I Replace I
(Lock Piston Trip) Check B3 I I Compressor j
[ C heckRprPoeca:d u r_-_ _ 1< N
B4. LED blinks six times, then repeats (Current Trip: A & E=lnverters)
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.
.' ] .i Blink 6 time
_v. _NG_[ Rep,ace i
Protection
y NG
C IhOgclk B [_ (Current Trip) Check B4 _ Capacitor
!
,. _dom sop -- .. NG
[ Repeat ] N _ _ ....... .... t tri n-'"_"'-_ ._ _/., ..... _ , [ Replace
]
_ -_ ._ _ _. I ,,. Damage _l
| Check Procedure _ _ uccurr _ I Power I '" _.CheckC3 _ _ _ _ _ Compressor
J
/
- 55 -