- 89 -
B4. LED blinks 7 times with IPM fault trip (IPM fault).
Measures depending on the trip and the number of LED blinks
Blink
OFF
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 the
protection
logic
Check for IPM
fault trip or if
LED blinks
7 times (IPM fault)
Comp. does not
operate
Y
N
Recheck the inspection
procedure
Replace
the PCB
short
open
Check the
damage of IPM
with naked eyes
sor
i
i
i
s tur
r
r
r
r
n
n
n
n
n
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
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e
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e
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e
e
e
e
e
e
e
e
e
e
e
e
e
d
d
d
d
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d
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
f
f
f
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f
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f
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f
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.
Point A
Short
Check
Reset the
power
Rec
ord
Replace PCBA if a short-circuit has
occurred either in
ྙ
or
ྚ
.
Turn off
the
power
Remove
the
harness
Multi
Tester
ྙ
ྚ
Protection Logic
B5. LED blinks 8 times with Comp Tx error trip (communication error)
Measures depending on the trip and the number of LED blinks
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).
Check the
protection
logic
LED blinks 8 times with
Comp Tx error trip
(communication error)
Check if the comp.
operates when the
C-fan does not operate
Y
N
Recheck the
inspection
procedure
Replace the
PCB
Reset the
power
OFF
Blink
Rec
ord
1. Check the temperature & noise
of the compressor and outlet.
2. Check if the C-fan
operates normally.
Protection Logic
Summary of Contents for LFXS32726 Series
Page 4: ... 4 2 PARTS IDENTIFICATION NOTE Ice Bin Icemaker Ice Compartment Door ...
Page 7: ... 7 ...
Page 21: ... 21 5 CIRCUIT DIAGRAM ...
Page 22: ... 22 6 TROUBLESHOOTING ...
Page 23: ... 23 ...
Page 25: ... 25 7 3 Sub PCB P N EBR76468402 ...
Page 99: ... 99 99 13 DESCRIPTION OF FUNCTION CIRCUIT OF MICOM ...
Page 100: ... 100 100 ...
