Sharp SJ-43N-BE Service Manual download pdf (Page 15)

SJ-P43N/43N

SJ-P47N/47N

(2) Where is melted frost brought

1. Melted frost is brought into the evaporating

pan at the back of the set and is evaporated

here by the heat of compressor.

2. Be sure to use Evaporating pan as inserted

so as to be level with the outer case.

2. DEFROSTING

(1) No defrosting operation is necessary

No defrosting operation is necessary.

As this machine is so designed that a built-in

evaporator cools air and a fan circulates cooled

air, neither the freezer nor the refrigerator is

frosted, though the evaporator is frosted.

The frosted evaporator is defrosted automatically

due to the function of defrosting timer and heater,

requiring no defrosting operation.

(3) The following circuit diagrams in the table show automatic defrosting function of the refrigerator with

timer and defrost thermostat.

Operation Electric diagram Description

1. Cooling

(Normal)

2. Defrosting

(Time 20 to 30 min.)

3. Drain

(Time approx. 5 min.)

4. Restart

(Time approx. 5 min.)

The integration timer integrates running

time of the compressor. When it reaches

cycle time of defrost timer, the timer

contact is changed to start defrosting.

When the defrost thermostat becomes

OFF, the timer motor starts running.

During the operation time (delay time

of defrost time)

defrosted water is

drained outside the refrigerator.

Timer contact is changed to cooling

operation and the compressor starts

running and the timer motor stops.

Defrost thermostat contact becomes ON

when it’s cooled. And the timer motor

starts running. (Figure F-3.)

Figure F-3.

Figure F-4 .

Figure F-5.

Figure F-6.

TM COMP

Defrost thermostat ON Compressor running

Timer motor running

Timer contact

Defrost

thermostat (ON)

Defrost heater

Thermo. fuse

Compressor

Timer motor

SOURCE

TM COMP

Defrost thermostat OFF Compressor running

Timer motor stops

Thermostat Timer contact

Defrost

thermostat (OFF)

Defrost heater

Thermo. fuse

Compressor

Timer motor

SOURCE

TM COMP

Defrost thermostat OFF Compressor stops

Timer motor running

Thermostat Timer contact

Defrost

thermostat (OFF)

Defrost heater

Thermo. fuse

Compressor

Timer motor

SOURCE

TM COMP

Defrost thermostat ON Compressor stops

Timer motor stops

Thermostat Timer contact

Defrost

thermostat (ON)

Defrost heater

Thermo. fuse

Compressor

Timer motor

SOURCE

Thermostat

The timer contact is changed to start

defrosting, the timer motor stops, and

power is supplied to the defrost heater.

It takes about 20 to 30 min. to defrost.

When little frosted, the defrosting takes

little time. When much frosted, the def-

rosting takes much time.

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Sharp SJ-43N-BE Service Manual Page 15

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