Olp (Over Load Protector); Circuit Diagram - LG GR-349SQF Service Manual

3 OLP (OVER LOAD PROTECTOR)

1) Definition of OLP
(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.
(2) When over-voltage flows to Compressor motor, the
Bimetal works by heating the heater inside the OLP,
and the OLP protects Motor by cutting off current which
flows to the Compressor Motor.
2) Role of the OLP
(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.
(2) Do not turn the Adjust Screw of the OLP in any way for
normal operation of the OLP.
(Composition and connection Diagram of OLP)

CIRCUIT DIAGRAM

Circuit 1
CIRCUIT DIAGRAM
DISPLAY CONTROL P.W.B
1 2 3 4 5 6 7 8 9
GY PR BL YL
BL GY PR BL YL
DEF-SENSOR
1 2 3 4 5 6 7 8 9
BL
BO
F-SENSOR
BO
GY
DOOR OPEN A
PWB ASSY, MAIN
PERCEPTION
B RD
9 8 7 6 5
BL YL BK
YL
BL
YL
POWER
SUPPLY
CORD
GN/YL
BK
C
N
L
BL
PR
M
A
GY
RD
B
BL BL BL
BK:BLACK BN :BROWN RD:RED
YL:YELLOW GN:GREEN BL :BLUE
SB:SKY BLUE PK :PINK GN/YL:GREEN/YELLOW
NOTE : 1. This is a basic diagram and specifications vary in different localities.
2.Circuit 2 has been only applied to C4 C5 B3 power cord type.
RT-SENSOR
BO RD BN WH WH
¥ THE PLUG TYPE,
BO RD BN WH WH
CAPACITOR PART,
COMPRESSOR EARTH
PART ON CIRCUIT
DIAGRAM ARE SUBJECT
TO CHANGE IN DIFFERENT
LOCALITIES AND ACCORDANCE
WITH MODEL TYPE
¥ WHEN STARTING CAPACITOR
IS NOT USED, NO.3,4 OF PTC
4 3 2 1
START IS CONNECTED
GY BN
INTERNALLY
BK GY BN
BK
RUNNING
PK
M
2
RD
4 5
3 6
BL BL BL BL
CAPACITOR P.T.C
PART STARTER
3580JS8001B
BO:BRIGHT ORANGE
PR:PURPLE GY:GRAY WH:WHITE
WH/BK:WHITE/BLACK
CONTACTING
POINT
Circuit 2
2.Ref.
BK
BK
C
COMPRESSOR
S
M
EARTH PART
- 10 -
COVER
BIMETAL
CONTACTING
POINT
HEATER
TERMINALS
BIMETAL
ADJUST
SCREW
HEATER
Figure 20
3854JS8003Y