Premium PRF200LW User manual

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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
4. 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
1
Effective
Volume
Fridge（L）
150.70
Freezer（L）
42.10
Total（L）
192.80
2
Input Power（W）
110
3
Rated Voltage
115V
4
Rated frequency
60HZ
5
Refrigerant
R134a
6
Filling Quantity(g)
90
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
A
Do
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

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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
is
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

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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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Check the ground and adjustable leg
to make sure the machine is on flat
ground and the adjustable leg is in
right position.
Ground is
uneven or
adjustable leg
is not in
position.
Function testing after repairing
It need 1~2 days to test the refrigerator after repairing. It can be used if the test report
shows that the machine is safety and the cooling capacity is ok.
We should do following inspection in test:
1. Insulation and safety:
Before plug in, please check the insulation resistance between conductor and uncharged
metal parts with instrument of DA 500 MQ. The resistance should be not less than 1MQ.
(Please donot test the resistance after plug in.)
2. On and off function
The compressor should start and operate normally, i.e. start and stop and restart after
working for a while. If it failed to do so, then please repair again. The refrigerator can be
used after the compressor work normally.
3. Cooling capacity
Please check the evaporator and return-air duct 24 hours later after plug in. The frost on
the evaporator should be even-distributed, and there should be no frost on the return-air
duct. Besides, the temperature of the surface of freezer evaporator should be no more
than -14℃. Please note to put the detector at 1/3 of the freezer height from the top and at
center position from all sides in testing. The result should meet the star level.
4. Construction of the electric parts and its safety
Check all the electric parts after repairing to ensure that they are connected firmly, such
as thermostat, compressor junction box, especially the earth wire and conductor.
5. Leakage
Please check all the wiped joints of cooling system with halogen leak detector or suds to
make sure they are not leaking. If any leakage, please repair and test it again.

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Spare parts for repairing
No.
Name of parts
Quantity per unit
Remarks
1
Compressor
1
2
Thermal protector
1
3
PTC relay
1
4
Rubber leg of compressor
4
5
Dry filter
1
6
Thermostat
1
7
Compressor capacitor
1
Only for high
efficient
compressor
8
Power plug
1
9
Adjustable leg
2
10
Door seal/ gasket for freezer
1
11
Door seal/ gasket for fridge
1

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