LG LTCS20020 Series Service Manual page 15

Actions for each number of TRIP and LED blinking
2. Current Trip and LED blinking 6 times (Current Trip)
Blink B
off/on within 3 min.
1. If it blinks 6 times, but there is no significant difference between the temperature inside the refrigerator and
the set temperature, there is no problem in PCB, Compressor, or Cycle.
2. If it blinks 6 times and problem such as no cooling occurs, it means cycle leakage or cycle clogged (moisture, trash).
Cause: Cycle leakage or clogging, excessive Compressor temperature increase, compressor piston locked, PCB IPM
device burned due to Condenser fan defect
Cause: Over-current protection
Action: Check PCB output, Check operation of the Compressor single unit, leakage inspection and check cycle clogging
(For re-vacuum, 30min. additional vacuum)
Check
Check Current or LED
Protection
blinking 6 times (Current
Logic
Replace PCB
Check PCB output
Check inspection
procedure again
n i l k B n i l k B n i l k B n i l k B n i l k
Intermittent
operation of
Compressor
Trip)
Check PCB
Did Current trip
occur?
V
U
W
OFF
output
Check
Power
Compressor
Reset
defect
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15
Only training and service purposes.
Check HarnessP
Modify
U.V.W
HarnessP
Replace
Compressor