Troubleshooting; Compressor And Electric Components - LG LTCS20020 Series Service Manual

7. TROUBLESHOOTING

7-1. COMPRESSOR AND ELECTRIC COMPONENTS

1
Power Source.
Check
2
Check resistance
resistance of
of motor
motor
compressor.
compressor.
.
Check
3
resistance of
PTC-Starter.
3
Check OLP .
Check
4
starting state.
Remove PTC-Starter
Remove PTC-Starter
from compressor and
from compressor and
measure voltage
measure voltage
between T erminal C of
between T erminal C of
compressor and
compressor and
terminal 5 or 6 of PTC.
terminal 5 or 6 of PTC.
No voltage.
Applied voltage isn't
Applied voltage isn't
in acceptable range.
in acceptable range.
(2 2 0 V ±10%)
(2 2 0 V ±10%)
Check the 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).
(Rated voltage
YES
NO
Advise customer that
power supply needs to
be checked by an
electrician.
Replace
compressor
At normal temperature
6.8 +20: OK
If power conducts: OK
If not: NG
YES
Supply Did
compressor
voltage rating
with ±10%.
NO
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YES
2
5
Reconnect.
Check connection
condition.
Replace OLP.
5
3
3
4 5
YES
Compressor
is OK
Replace the
compressor
NO
1