Troubleshooting; Compressor And Electric Components - LG LRDC20731ST 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
Terminals 5 or 6 of PTC.
No Voltage.
Applied voltage isn't
in range of Rating
Voltage ±10%.
Check resistance
between M-C, S-C and
Open or short
M-S in Motor
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).
(Reated 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.
4.5~9 Ω
Open
Not open
Open or short
YES
Supply
Did
voltage rating compressor
with ±10%.
start?
NO
- 10 -
YES
2
5
Replace OLP.
Check connection
condition.
Reconnect.
5
3
3 4 5
4
Replace
5
PTC-Starter.
5
Replace OLP.
YES
Compressor
is OK
Replace the
compressor
NO
1