Troubleshooting; Compressor And Electric Components - LG LFC20770SB Service Manual

8. TROUBLESHOOTING

8-1. COMPRESSOR AND ELECTRIC COMPONENTS

1
Power Source.
Check
2
Check resistance
resistance of
of motor
motor
compressor.
compressor.
.
Check
3
resistance of
e-PTC-Starter.
4
Check OLP.
Check
5
starting state.
Remove e-PTC-Starter
from compressor and
measure voltage
between Terminal C of
compressor and
terminal 5 or 6 of e-PTC.
No voltage.
Applied voltage isn't
in acceptable range.
(115V ±10%)
Check the resistance
between M-C, S-C and
M-S in motor compressor.
Check resistance of
two terminals in
e-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
NO
Advise customer that
power supply needs to
be checked by an
electrician.
The range of resistance is between 1~50 ? (ok)
Replace
Open or short
compressor
At normal temperature
6.8 +20: OK
?
If power conducts: OK
If not: NG
YES
Supply
voltage rating
with ±10%.
- 27 -
YES
YES
Reconnect.
Check connection
condition.
Replace OLP.
3 4
YES
Did Compressor
compressor
is OK
Replace the
compressor
NO
NO
2
5
5
3
5
1