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CAUTION

BEFORE SERVICING THE UNIT,READ THE “SAFETY
PRECAUTIONS” IN THIS MANUAL.

REFRIGERATOR

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)

CONTACTING
POINT

COVER

BIMETAL

CONTACTING
POINT

HEATER

TERMINALS

ADJUST
SCREW

HEATER

BIMETAL

NOTE : 1. This is a basic diagram and specifications vary in different localities.

- 10 -

C
N

L

3

4 

6

5

2

S

BK

PK

RD

BL

BL

BL

BK

BL

CAPACITOR

PART

EARTH PART

COMPRESSOR

P.T.C

STARTER

RUNNING

BL

BL

BL

BK

PR

GN/YL

POWER
SUPPLY
CORD

RT-SENSOR

YL

BL

DEF-SENSOR

F-SENSOR

DOOR OPEN

PERCEPTION

BL
BL

BO
BO
GY
RD

GY PR BL YL

RD BN WH WH

BO

YL

BK

GY

BN

BK

OVERLOAD

PROTECTOR

STARTING

COOLING      

FAN MOTOR

DOOR SW-R

R-LAMP

M

C

M

FAN MOTOR

PWB ASSY, MAIN

DISPLAY CONTROL P.W.B

CIRCUIT DIAGRAM

1 2 3 4 5 6 7 8 9

GY

A

PR BL YL

RD BN WH WH

BO

1 2 3 4 5 6 7 8 9

¥ THE PLUG TYPE,

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
START IS CONNECTED
INTERNALLY

M

BK:BLACK

YL:YELLOW

SB:SKY BLUE

BN :BROWN

GN:GREEN

PK :PINK

RD:RED

BL :BLUE

GN/YL:GREEN/YELLOW

BO:BRIGHT ORANGE

PR:PURPLE

GY:GRAY

WH/BK:WHITE/BLACK

WH:WHITE

B

9 8 7 6

4 3 2 1

5

BL

YL

BK

GY

BN

BL

FUSE-M

( 72

ûC

)

SHEATH HEATER

GY

RD

B

A

3

854

JS8001B

- 11 -

YES

YES

YES

NO

YES

YES

NO

NO

YES

NO

YES

Power
Source.

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.

Reconnect.

Replace
PTC-Starter.

Replace OLP.

O.K.

Check connection
condition.

OLP disconnected?

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 in
the voltage of Rating
Voltage ±10% below.

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.

Check the
resistance of
Motor
Compressor.

Check the
resistance of
PTC-Starter.

Check OLP.

Check
starting state.

- 12 -

YES

NO

Normal operation of
Compressor is
impossible or poor.

Separate the PTC-Starter
from Compressor and
measure the resistance
between No. 5 and 6 (only
RSIR type) or No. 4 and 5 of
PTC-Starter with a Tester or
Whistone Bridge.
(Figure 21)

Separate the OLP from the
Compressor and check the
resistance value between
two terminals of OLP with
a Tester. (Figure 22)

Observation value is
220V/50Hz : 22

§

±30%

115V/60Hz : 6.8

§

±30%

240V/50Hz : 33

§

±30%

127, 220V/60Hz : 22

§

±30%

The resistance value is 0

or serveral hundreds 

§

.

The value is 

¡˜

.

Check another
electric components.

Replace OLP.

Check another
electric
components.

Replace
PTC-Starter.