Premium PRF200LW Manuale utente

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SERVICE MANUAL

Model Number: PRF200LW

PRF201LB

PRF202LS

REFRIGERATOR

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CONTENTS

1. Form for technical specification

2. Cautions for Safe Maintenance

3. Circuit diagram

The main points for disassembling and changing spare parts

6. The essentials of cooling system failure

7. On-site troubleshooting quick reference

8. Function testing after repairing

9. Spare parts for repairing

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Form for technical specifications：

NO.

Items

Product

Refrigerator

Model

PRF200LW

PRF201LB

PRF202LS

Effective

Volume

Fridge（L）

150.70

Freezer（L）

42.10

Total（L）

192.80

Input Power（W）

110

Rated Voltage

115V

Rated frequency

60HZ

Refrigerant

R134a

Filling Quantity(g)

Cautions for Safe Maintenance

In order to have a safe inspection, please keep the following tips:

1. Tips for repairing work:

a. Take care of the nearby fire while repairing. Do keep the gas flame extincted before

you begin other repairing work as the coolants would produce toxic gas while meeting

the naked flame, sparkle or capacitor.

b. Do not weld in a wireless or airtight room.

c. Do keep a good air-flowing while discharging the coolants.

d. Pay much attention to the rest coolants and pressure inside while cutting off the

return pipe and tailpipe.

2. Pull the plug:

Pull the plug before you work in order to ensure safety.

3. Prevention of electrical shock:

Do cut off the electricity while maintaining. If some work must be done with the

power on, please prevent danger of electric shock， keep away from the live

parts. Once the aging wire is found, exchange for a new one in time.

4. Use the spare parts correctly

The spare parts must be exchanged for the same one, including the type and

model, which could refer to the spare parts list. People mustn’t exchange for

other spare parts with different type or model. Worse still, they should not repair

the spare parts.

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5. Use maintenance tools correctly:

Suitable maintenance tools must be used while repairing the refrigerators. It may

cause bad contact or loose fastening, leading to an accident if unsuitable tools are put

into use.

6. Wire connection:

It must be welded or connected by terminal and sealed by insulating tape if the snipped

wire should be taken into use again in order to ensure a good contact.

7. Insulation test:

 After the completion of the maintenance assembling ，a multimeter should be

employed to examine the insulation resistance. It could not be under power until the

insulation resistance is confirmed to reach above 1MΩ.

8. Grounding test:

 A multimeter should be used to test ground resistance. It is good grounding if the

resistance is less than 0.15Ω. The serviceman should handle timely if bad grounding is

found so that it can ground completely, well and reliably.

9. Pay attention to the children

People should stop the children from approaching in case an accident occurs.

10. Cleaning

Cleaning the refrigerator is necessary after the repairing work and the users should also

be reminded of the related cautions.

CIRCUIT DIAGRAM：

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The main points for disassembling and changing spare parts

Before disassembling or replacing the spare parts, make sure the power line of the unit is

disconnected.

1. Replacement of thermostat:

Get out the screw through cross head screwdriver, take down thermostat box, replace

the bad thermostat with a new one, and then fixed screw.

2. Replacement of PTC relay and thermal protector

Take down the connection box cap and jump ring that near compressor, then

exchange for a new relay or thermal protector, lid the connection box and at last fix the

jump ring.

3. Replacement of door seal:

Get out the screw through cross head screwdriver, take down seal, replace for a new

one and fix with screw. After that, open & close the door for several times, ensuring a

good work.

If it is embedded seal, please take down the old seal from slot liner, change into a new

one, then open & close the door several times, insure it work well.

4. Replacement of compressor

a. Cut down the mouth of the coolants pipe and discharge coolants. After it was totally

discharged, unsolder all the pipes connected with compressor, get out of the compressor

and exchange for a new one. Do remember change the dry filter at the same time.

b. Set up the compressor, weld the higher and lower pressure point, check up the

leakage, then vacuum and inject the gas from the mouth with low-pressure. Conduct a

comprehensive performance inspection after completion of repairs.

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The essentials of cooling system failure

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On-site troubleshooting quick reference

item

phenomenon

The contents of checking

Reason

not

cooling

completely

The lamp inside

is not lit and the

compressor

doesn’t work

Observe whether

there is electrical

power in other indoor

No electricity

near this region

Power failure

Appliance has

no electricity

Fuse problem

Refrigerator

circuit no

problem

Socket problem

The compressor

doesn’t work, but

the lamp inside is

lit

Short-circuit the thermostat contacts，

（temporary jumper）compressor can

work （the thermostat knob to MAX

spot）

Thermostat

broken

With sound, when rotate the

thermostat knob

Thermostat

knob is broken

or didn’t

assemble well

Thermal protector

Check with a

multimeter to

see if

short-circuit

if yes, the

protector is

broken

PTC relay

Check with a

multimeter to

see if

short-circuit

if yes, the

protector is

broken

line

Check with a

multimeter to

see if

short-circuit

Broken or

terminals loose

compressor

Measuring coil

resistance with

a multimeter

Winding the

coil circuit or

burn

Test the

insulation

resistance with

megger, if it is

below 1MQ,

can’t use for

long time

Motor winding

burn

- 8 -

Voltage

Test power

supply voltage

The voltage is

too low, the

compressor

can’t start。

Compressor

workable

Cooling system

No refrigerant

flow sound of

evaporator, but

with oil marks

Cooling pipe

leakage

compressor

No gas

discharge at

outlet of

compressor

Valve is aulty

Abnormal

sound

compressor

Compressor

has problem

B、

Compressor

workable,

but

the

cooling

effect

not

good

Used incorrectly

Check the frost layer thickness(greater

than 5mm)

Thick cream

Thermostat controller is the weak

(numeric) position

Thermostat

control position

is not correct

Moisture inside the store, more items,

or open the door too many times

Evaporation of

water vapor

The food is too much inside, too

crowded, poorly ventilated or not

Put too much

food

Put into the soup or other hot food

Temperature

rise in

temperature if

put into hot

food

Open the door frequently

Open the door

frequently,

affect the

cooling

Cold to escape

Door seal broken or deformation

Door seal

broken

The door is blacked by food or not?

Or forgot to closed tightly?

The door is not

tightly closed

Doors sag or not

Hinge

deformation

Improper

placement

Refrigerator is irradiated by sunlight

Sunlight affect

the heat

emission

- 9 -

The distance between the back of the

refrigerator and the wall is too close

Too close,

affect the heat

emission

Are there sources of heat nearby

refrigerator

Overheating of

ambient

temperature

affect heat

emission

C、

Temperature

is too low

Thermostat

unworkable

The location of thermostat is

appropriate

Temperature is

too low

Bulb is loose or damaged

Thermostat

didn’t assemble

well

Thermostat is malfunctioning

Thermostat is

broken

D、

Dewing

There are dew

outside the

refrigerator

Check the environment to make sure

whether it is wet.

Air is too humid

There is water

drip out from the

refrigerator

Check the drip tray to make sure

whether it is full

Drip tray is full

E、

Leakage

There is

electricity outside

the refrigerator

Check the insulation resistance of the

compressor with instrument to make

sure whether it is less than 1MQ.

Insulation not

good

Is refrigerator humid? How about the

insulation?

Refrigerator is

humid or bad

insulation

Check the conductor and earth wire to

make sure whether the end of the

conductor is connect with refrigerator

body or other metal parts, or some

electric parts share the same earth

wire and no earth-return circuit.

Leakage

Is there static induction phenomenon?

static induction

F、

Vibration

and noise

noise comes from

the inside of the

compressor

Check the compressor to make sure

whether there is unusual noise

Compressor

problem

There is vibration

noise from the

refrigerator

Check pipes/tubes to make sure

whether they are crashed into

together

Pipes/tubes

crashed into

together

Is evaporator in right position?

Evaporator

looseness

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