Note To Use Ptc-Starter; Olp (Over Load Protector) - LG GC-B379S*QA Service Manual

ADJUSTMENT
OVERLOAD
PROTECTOR(O.L.P)
PTC STARTER
RSIR
RELAY ASSEMBLY
4. Motor Restarting and PTC Cooling (1) For restarting after power
off during normal Compressor Motor operation, plug the power
cord after 5 min. for pressure balance of Refrigerating Cycle and
PTC cooling.
(2) During normal operation of the Compressor Motor, PTC
elements generate heat continuously. Therefore,
if PTC isn't cooled for a while after the power has been shut off,
Motor can't operate again.
5. Relation of PTC-Starter and OLP
(1) If the power is off during operation of Compressor and
the power is on before the PTC is cooled, (instant shut- off
within 2 min. or reconnect a power plug due to misconnecting),
the PTC isn't cooled and a resistance value grows. As a result,
current can't flow to the sub-coil and the Motor can't operate
and the OLP operates by flowing over current in only in the
main-coil.
(2) While the OLP repeats on and off operation about 3-5
times, PTC is cooled and Compressor Motor performs
normal operation.
If OLP doesn't operate when PTC is not cooled, Compressor
Motor is worn away and causes circuit-short and fire. Therefore,
use a properly fixed OLP without fail.

3. Note to Use PTC-Starter

COMPRESSOR
MOTOR
HERMETIC
TERMINAL

4. OLP (OVER LOAD PROTECTOR)

1. Definition of OLP
(2) When over-voltage flows to Compressor motor, the
2. Role of the OLP
(2) Do not turn the Adjust Screw of the OLP in any way for
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(1) Be careful not to allow over-voltage and over-current.
(2) No Strike Don't apply a forcible power or strike.
(3) Keep apart from any liquid.
If liquid such as oil or water away enter the PTC, PTC materials it
may break due to insulation breakdown of the material itself.
(4) Don't change PTC at your convenience.
Don't disassemble PTC and mold. If the exterior to the
PTC-starter is damaged, resistance value is altered and it may
cause poor starting of the compressor motor may cause.
(5) Use a properly fixed PTC.
(1) OLP (OVER LOAD PROTECTOR) is attached to the
Hermetic Compressor and protects the Motor by cutting
off current in Compressor Motor in case of over-rising
temperature by Bimetal in the OLP.
Bimetal works by heating the heater inside the OLP,
and the OLP protects Motor by cutting off current which
flows to the Compressor Motor.
(1) The OLP is attached to the Hermetic Compressor used
for the Refrigerator and Show Case and prevents the
Motor Coil from being started in the Compressor.
normal operation of the OLP.
(Composition and connection Diagram of OLP)
CONTACTING
POINT
COVER
CONTACTING
POINT
TERMINALS
BIMETAL
ADJUST
SCREW
HEATER
BIMETAL
HEATER