Led Blinking 7 Times (Ipm Fault) - LG LTCS24223B /04 Service Manual

Actions for each TRIP and the number of LED blinking

3. LED blinking 7 times (IPM Fault)

B n i l k Blink Blink Blink Blink Blink Blink
Cause: IPM Short, defect(burned or damaged)
Objective: Protection of the over-current caused by IPM short or defect.
Actions: Visual verification of IPM burn when COMP is not in operation. Check whether
there is a short circuit in U, V, or W part.
Replace PCB
Check Check IPM Fault or
LED blinking 7
protection
times(IPM Fault)
logic
Compressor is not
verification of
activated
Power
Reset
O F F
GND
Visual
Check Point A short
circuit IPM output
IPM burn
Re-confirm
inspection
procedure
- 16 -
U
GND
Replace PCB
>80V-20%