Compressor Troubleshooting - LG LFCS31626 Series Service Manual

11. Compressor Troubleshooting

PCB Check (Simplify)
A-inverter
Con201
Power Off
Disconnect
Test Mode
Ref.
TEST1 Forced Starting
Troubleshooting
Recheck
Reset
LED
Not
Blink?
Cooling
N
Check C
Power On
Comp
FLB075(A-Inverter)
TDC (Full Stroke)
LED blink 8 Reset
LED blink 1 Reset
LED blink 7 Reset
LED blink 5 Reset
Y
Heavy Repair
LED blink2 Reset
LED blink3 Reset
Heavy Repair
LED blink6 Reset
Comp.
Work?
Y
Y
Refrigerant
Heavy Repair
leak ?
TEST 1 Mode
Time>30sec
& V¡ 200
N
Replace Driver PCB
Display & sound
Display ON, Buzz 1 time
LED blink 8
Replace Driver PCB
LED blink 1
Replace Driver PCB
LED blink 7
Replace Driver PCB
N
Comp.
LED blink 5
Work?
Y
N
Y
Leakage?
N
Comp.
LED blink2
Work?
Y
LED blink3
Y
N
Refrigerant
leak?
N
Comp.
LED blink6
Work?
Y
N
Y
Heavy Repair Leakage?
IPM output
N
>
80V-20%
Y
Comp.
Check?
N
Recheck
- 67 -
Protection Logic
Y
PCB OK
Check Voltage about 200V
past 30second after turn on
Refer
N
Comp.
Replace Comp.
Check?
Recheck
Harness Y Comp. N
Check? Check?
N
Fix Harness
Recheck
N
Comp.
Check?
Recheck
N
Replace Driver PCB
N