Troubleshooting; Compressor And Electric Components - LG LRFD22850ST Service Manual

6. TROUBLESHOOTING

6-1 COMPRESSOR AND ELECTRIC COMPONENTS

1
Power Source.
Check
2
resistance of
Motor
Compressor.
Check
3
resistance of
PTC-Starter.
4
Check OLP.
Check
5
starting state.
Remove PTC-Starter
from Compressor and
measure voltage
between Terminal C of
Compressor and
Terminal 5 or 6 of PTC.
No Voltage.
Applied voltage isn't
in acceptable range.
(115V ±10%)
Check resistance
between M-C, S-C and
M-S in Motor Open or short
Compressor.
Check resistance of
two terminals in
PTC-Starter.
Check resistance of two
terminals in OLP.
Check the power supply
under load.
(Compressor attempting
to re-start after being off
for 5 minutes).
(Rated Voltage
±10%)?
YES
OLP disconnected?
NO
Advise customer that
power supply needs to be
checked by an electrician.
The range of resistance is between 1~50Ω(ok)
Replace
Compressor.
Reference Page12.
Reference Page12.
YES
Supply
Did
voltage rating compressor
with ±10%. start?
NO
- 11 -
YES
Replace OLP.
Check connection
condition.
Reconnect.
3 4
YES
Compressor
is OK
Replace the
compressor
NO
2
5
5
3
5
1