LG LSC 27950SB, Service Manual

Page: 67 / 108

2. Faults 2-1. Power 2-2. Compressor
TROUBLE DIAGNOSIS
- 67 -
Problems
Causes
Checks
Measures
Remarks
No power on
- Power cord cut.
- Check the voltage with tester.
-Replace the components.
outlet.
- Faulty connector insertion.
- Check visually.
-Reconnect the connecting parts.
- Faulty connection between plug
- Check visually.
-Reconnect the connecting parts.
and adapter.
Fuse blows out.
- Short circuit by wrong connection.
- Check the fuse with tester
- Find and remove the cause of
- Replace with rated
- Low voltage products are
or visually.
problem (ex. short, high voltage,
fuse after confirming
connected to high voltage.
- Check the input volt are with tester
low voltage).
its specification.
- Short caused by vermin.
(between power cord and products).
- Replace with rated fuse.
- Electricity leakage.
- Check the resistance of power cord
■
If fuse blowns out
- High voltage.
with tester (if it is 0
Ω
, it is shorted).
frequently, confirm
- Short circuit of components
the cause and repair.
(tracking due to moisture and dust
penetration).
Problems
Causes
Checks
Measures
Remarks
Compressor
- Faulty PTC.
- Check the resistance.
- If resistance is infinite, replace it
does not
Vlaue:
∞
is defective.
with new one.
operate.
- If it is not infinite, it is normal. - Check other parts.
- Compressor is locked up.
- If compressor assembly parts are
- During forced operation:
normal (capacitor, PTC, OLP),
- Operates: Check other parts.
apply power directly to the
- Does not operate operate:
compressor to force operation.
Replace the frozen compressor
with new one, weld, evacuate, and recharge refrigerant.
OLP It starts as soon as it is
• Refer to weld repair procedures.
contacted.
Auxiliary winding Main winding Power