Troubleshooting - LG LV-C362FLA0 Svc Manual

Troubleshooting

Problem
1. Nothing works
2. Power on but system
will not function
3. Power on but indoor
will not function
4. Power on but compressor
will not function
5. Power on but outdoor
fan will not function
6. Power on but indoor
manual key will not
function
7. Power on but indoor
display will not function
8. Indoor up-down louver
will not function
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Only for training and service purposes
Checklist
Power supply to unit
PCB fuse
Interconnecting wiring
PCB varistor
Transformer
Re-set control switch
Handset control
Mode on hand set
Power on fan terminal (pcb)
Evaporator sensor
Connector plug
Motor overload
Faulty motor
Evaporator frozen
Motor capacitor
Room temp set point
Relay on PCB
Comp contactor
Comp overload
Indoor sensor(de-ice )
Comp internal overload
Compressor terminals
De-ice sensor (heating)
Ambient temp low
Outdoor sensor
Indoor coil too hot
Fan relay on PCB
Faulty motor
Connector plug
Faulty switch
Connector plug
Faulty display
Reset switch position
Handset control
Faulty stepping motor
Connector plug
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Remedy List
Re-set circuit breaker or change fuse
Change fuse
Look for break in cable or loose connection
Replace PCB
Replace PCB
Re-set
Change batteries ( or hand set )
Change function
No power check relay, if faulty replace
If short circuit, replace
Repair or replace
Wait to reset and check amps
Replace
Defrost and check filter / gas charge & de-ice sensor
Replace
Adjust on hand set
Replace relay or PCB
If power on contactor coil, replace contactor
Re set, check amps and set point
See control functions
Allow comp to cool down, check gas
Check for good connection
Wait for defrost to terminate
Check gas pressure
See control functions
Clean filter
Replace relay or PCB
Replace motor
Replace or repair
Replace switch or PCB
Replace or repair
Replace display or PCB
Correct or operate once
Change function
Replace
Replace or repair
LGE Internal Use Only