LG LFX25973 Series - 12 Compressor Troubleshooting

12. COMPRESSOR TROUBLESHOOTING
- 54 -
PCB Check (Simplify)
Test Mode
Power Off Power On PCB OK
Replace Driver PCB
N
Y
Time>30sec
& V≒200
Con201
Disconnect
A-inverter
TEST 1 Mode
Protection Logic
Check Voltage about 200V
past 30second after turn on
Troubleshooting
N
Y
N
N
Y
Y
Y
N
N
N
Y
Y
Y
N
N
Y
Y
N
N
Not
Cooling
Y N
N
N
N
N
Y
N
Y
Recheck
LED blink 1
LED blink 7
LED blink 5
LED blink2
LED blink6
Reset
Reset
Reset
Reset
LED blink 1
LED blink 7
Replace Driver PCB
Comp.
Check?
Replace Driver PCB
LED blink 5
LED blink2
Heavy Repair
Heavy Repair
Comp.
Work?
Comp.
Check?
Replace Comp.
Comp.
Work?
Comp.
Check?
Harness
Check?
Leakage?
Recheck
Reset LED blink6
Heavy Repair
Heavy Repair Recheck
Replace Driver PCB
Comp.
Work?
Comp.
Check?
Refrigerant
leak ?
IPM output
>
80V-20%
Refrigerant
leak?
Recheck
Fix Harness
Comp.
Work?
Comp.
Check?
Leakage? Recheck
Reset
Check C
LED
Blink?
Ref.
Comp
FC75(A-Inverter)
Refer
TEST1 Forced Starting TDC (Full Stroke)
Display & sound
Display ON, Buzz 1 time