Troubleshooting; Compressor Troubleshooting; Test Mode - LG LFX31925 series Service Manual

12. Compressor Troubleshooting

PCB Check (Simplify)
A-inverter
Con201
Power Off
Disconnect

Test Mode

Ref.
TEST1 Forced Starting

Troubleshooting

Recheck
Reset
Y
LED
Not
Blink?
Cooling
N
Check C
Heavy Repair
TEST 1 Mode
Power On
Comp
FC75(A-Inverter)
TDC (Full Stroke)
LED blink 1 Reset LED blink 1
LED blink 7 Reset LED blink 7
LED blink 5 Reset LED blink 5
Heavy Repair
LED blink2 Reset LED blink2
Heavy Repair
LED blink6 Reset LED blink6
Heavy Repair
Comp.
Work?
Y
Y
Refrigerant
leak ?
- 60 -
Protection Logic
Y
Time>30sec
& V≒200
N
Replace Driver PCB
Display & sound
Display ON, Buzz 1 time
Comp. Y
Check?
N
Comp.
N
Work?
Y
N
Y
Leakage?
N
Comp.
Work?
Y
Y
N
Refrigerant
leak?
N
Comp.
Work?
Y
N
Y
Leakage?
IPM output
N
N
>
80V-20%
Y
Comp.
Check?
N
Recheck
PCB OK
Check Voltage about 200V
past 30second after turn on
Refer
Replace Driver PCB
Replace Driver PCB
N
Comp.
Replace Comp.
Check?
Recheck
Harness Y Comp. N
Check?
Check?
N
Fix Harness
Recheck
N
Comp.
Check?
Recheck
Replace Driver PCB
N