Troubleshooting; Compressor And Electric Components - LG GR-349STQA.CTIQRAN Service Manual

TROUBLESHOOTING (Mechanical Part)

1 COMPRESSOR AND ELECTRIC COMPONENTS

Power
1
Source.
Check the
2
resistance of
Motor
Compressor.
Check the
3
resistance of
PTC-Starter.
Check OLP.
4
Check
5
starting state.
Remove the PTC-
Starter from the
Compressor and
measure the voltage
between Terminal C of
Compressor and
Terminals 5 or 6 of PTC.
No Voltage.
Applied voltage isn't
in the range of Rating
Voltage ±10%.
Check the resistance
among M-C, S-C and
M-S in Motor
Compressor.
Check the resistance of
two terminals in PTC-
Starter.
Check if applying
a regular OLP.
Measure minimum
starting voltage after 5
min. for balancing cycle
pressure and cooling the
PTC.
(Rating Voltage
±10%)?
OLP disconnected?
Advise the customer
to use a regular
Trans.
YES
NO
Replace Compressor.
YES
NO
YES
OLP works within
30 sec. in forcible
OLP operation by
turning instant power
on and off.
Components start in
the voltage of Rating
Voltage ±10% below.
- 11 -
YES
YES
Replace OLP.
Check connection
condition.
Reconnect.
3
Replace
PTC-Starter.
YES
NO
Replace OLP.
YES
O.K.
NO
2
5
5
3
4 5
4
5
5
1