LG LTCS20020W, Service Manual

Page: 22 / 51

7-1. COMPRESSOR AND ELECTRIC COMPONENTS
Applied voltage isn't
in acceptable range.
(2 2 0 V ±10%)
Remove PTC-Starter
from compressor and
measure voltage
between Terminal C of
compressor and
terminal 5 or 6 of PTC.
Remove PTC-Starter
from compressor and
measure voltage
between Terminal C of
compressor and
terminal 5 or 6 of PTC.
1
2
3
3
4
2
5
5
3
5
1
4
3
YES
NO
YES
Open or short
YES YES
NO
NO
Power Source.
No voltage.
(Rated voltage
Did
compressor
Compressor
is OK
Replace the
compressor
Check connection
condition.
Advise customer that
power supply needs to
be checked by an
Supply
voltage rating
with ±10%.
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).
.
Check
resistance of
PTC-Starter.
Check OLP.
Check
starting state.
Check resistance
of motor
compressor.
Check the resistance
between M-C, S-C and
M-S in motor compressor.
Replace
compressor
Check
resistance of
motor
compressor.
electrician.
At normal temperature
6.8 +20: OK
If power conducts: OK
If not: NG
Reconnect.
Replace OLP.
Applied voltage isn't
in acceptable range.
(2 2 0 V ±10%)
7. TROUBLESHOOTING
22