LG LFXS32726 Series Service Manual page 89
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Also See for LFXS32726 Series:
- Owner's manual (59 pages) ,
- Service manual (109 pages) ,
- Owner's manual (64 pages)
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Measures depending on the trip and the number of LED blinks
B4. LED blinks 7 times with IPM fault trip (IPM fault).
Blink
Blink Blink Blink Blink Blink Blink
Purpose: To prevent over-current
due to IPM short-circuit or failure
Cause: IPM short-circuit or failure
Logic: Restart every 20 seconds after the compressor is turned off.
Check for IPM
Check the
fault trip or if
Rec
protection
LED blinks
ord
logic
7 times (IPM fault)
Comp. does not
operate
Measures depending on the trip and the number of LED blinks
B5. LED blinks 8 times with Comp Tx error trip (communication error)
Blink Blink Blink Blink Blink Blink Blink
Purpose: To detect failure in communication with the micom that controls the refrigerator set
Cause: Communication error
Logic: Blink the LED without turning off the compressor
(operate the compressor with the command issued right before the communication error).
LED blinks 8 times with
Check the
Rec
protection
Comp Tx error trip
ord
logic
(communication error)
Check if the comp.
operates when the
C-fan does not operate
OFF
sor
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Y
Turn off
Remove
the
the
power
harness
N
Recheck the inspection
Reset the
power
Blink
OFF
1. Check the temperature & noise
of the compressor and outlet.
Y
Replace the
PCB
N
Recheck the
Reset the
inspection
power
procedure
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Point A
Check the
Short
damage of IPM
Check
with naked eyes
open
Replace PCBA if a short-circuit has
occurred either in
procedure
- 89 -
Protection Logic
Multi
Tester
short
Replace
the PCB
or
.
Protection Logic
2. Check if the C-fan
operates normally.
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Troubleshooting
