LG LFX28968SW Service Manual - Page 55

Compressor Troubleshooting

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12. Compressor Troubleshooting PCB Check (Simplify) A-inverter Power Off Con201 Disconnect TEST 1 Mode Protection Logic Power On Time>30sec & V≒200 Y PCB OK N Replace Driver PCB Test Button Check Voltage about 200V past 30second after turn on Test Mode Ref. TEST1 Forced Starting Comp FLA075(A-Inverter) TDC (Full Stroke) Display & sound Display ON, Buzz 1 time Troubleshooting Refer Not Cooling Recheck Reset LED Y Blink? N LED blink 1 LED blink 7 LED blink 5 LED blink2 LED blink record LED blink record LED blink record LED blink record Check C LED blink6 LED blink record Reset Reset LED blink 1 LED blink 7 Comp. Y Check? N Replace Driver PCB Replace Driver PCB Reset LED blink 5 Comp. N Work? Comp. N Check? Replace Comp. Heavy Repair Y Y Leakage? N Recheck Reset LED blink2 Comp. N Work? Harness Y Check? Y N Fix Harness Heavy Repair Y Refrigerant N leak? Recheck Comp. N Check? Reset LED blink6 Comp. N Work? Y Y N Heavy Repair Leakage? Comp. N Check? Recheck Heavy Repair Comp. N Work? Y Y Refrigerant N leak ? IPM output > 80V-20% Y Recheck N Replace Driver PCB Comp. N Check? - 55 -

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- 55 -
12.
Compressor Troubleshooting
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
LED blink record
LED blink record
LED blink record
LED blink record
LED blink record
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
FLA075(A-Inverter)
Refer
TEST1
Forced Starting
TDC (Full Stroke)
Display & sound
Display ON, Buzz 1 time
Test Button