LG GR-B652Y*B, Service Manual

Page: 24 / 57

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6. TROUBLESHOOTING
6-1 COMPRESSOR AND ELECTRIC COMPONENTS
Power Source.
Check the
resistance of
Motor
Compressor.
Check the
resistance of
PTC-Starter.
Check OLP.
Check
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.
(Rating Voltage
10%)?
Replace OLP.
Check connection
condition.
Reconnect.
Replace
PTC-Starter.
Replace OLP.
O.K.
OLP disconnected?
YES
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
Advise the customer
to use a regular
Trans.
Replace Compressor.
OLP works within 30
sec. in forcible OLP
operation by turning
instant power on and
off.
Components start at
voltage
10% of
rated 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.