LG LRSOC2306 Series Service Manual page 74

Troubleshooting
2. Resolution by number of LED blinks
No.
LED blinking 1 time repeatedly
1
Blink -Off-Blink-Off-Blink-Off-Blink-Off-Blink-Off
LED blinking 1 time repeatedly
2
LED blinking 3 time repeatedly
3
LED blinking 4 time repeatedly
4
LED blinking 5 time repeatedly
5
LED blinking 6 time repeatedly
6
LED blinking 7 time repeatedly
7
LED blinking 8 time repeatedly
8
L E D operating condition
Repeat
Cause
PCB part
defect
(MICOM)
PCB part
defect (Piston
over-operation)
Power voltage
defect)
COMP cable
contact error
Piston lock
Circuit over-
current error
PCB part
defect (IPM)
Communication
error
77
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Service guide
1. After resetting the power check
normal operation
2
. When the same symptom occurs
again after taking action for 1,
replace the PCB
1.After resetting the power check
normal operation
2.When the same symptom
occurs again after taking action
for 1, replace the PCB
1.Check input power
2.After resetting the power check
normal operation
3.When the same symptom
occurs again after taking action
for 1 and 2 replace the PCB
1.Check connected condition
between PCB and COMP
2.When there is no issue with 1,
replace the PCB
1.After resetting the power check
normal operation
2.When the same symptom
occurs again after taking action
for 1, replace the PCB
3.
When the same symptom occurs
again after taking action for 2,
replace the COMP component
1.After resetting the power check
normal operation
2.When the same symptom
occurs again after taking action
for 1, replace the PCB
3.When the same symptom
occurs again after taking action
for 2, replace the COMP
component
1.After resetting the power check
normal operation
2.When the same symptom
occurs again after taking action
for 1, replace the PCB
1.After resetting the power check
normal operation
2.When the same symptom
occurs again after taking action
for 1, replace the PCB