SAWAFUJI ELECTRIC ENGEL MT35F-G4-P User manual

MODEL (Digital display type) :
MT35F-G4-P 0642 032 0T60
MT35F-U1D-P 0642 032 0310
MT45F-G4-G 0642 042 0T52
MT45F-G4-P 0642 042 0T60
MT45F-U1D-P 0642 042 0R40
MT45F-G4-L 0642 042 0T70
2020.02
#1
SERVICE MANUAL

●FOR REFRIGERATOR USERS
・Failing to service properly may result in poor reliability of the refrigerator.
・Read this booklet carefully and perform servicing with great care.
・
●FOR SAFETY OF YOURSELF
・
●SAFETY SYMBOLS
・The following warning labels in this booklet indicate precautions for service work.
Comply with what each symbol indicates whenever it appears.
●REFRIGERATOR CODE NUMBERS
・This manual is compatible with described model in below.
Please check refrigerator model name and number in lable .
(Lable place as picture)
NUMBER MODEL NAME
0642 032 0T60 MT35F-G4-P
0642 032 0310 MT35F-U1D-P
0642 042 0T52 MT45F-G4-G
0642 042 0T60 MT45F-G4-P
0642 042 0R40 MT45F-U1D-P
0642 042 0T70 MT45F-G4-L
This service manual describes maintenance procedures for ENGEL refrigerator.
This manual is intended for repair engineers who are familiar with basics service skills and
knowledge for ENGEL refrigerator.
This manual does not guarantee correct maintenance when service is done by a non-skilled
worker without technical knowledge.
Note that the content of this booklet including product specifications is subject to change for
improvement without notice.
Always comply with the procedures, directions, and work tips in this booklet when
servicing the refrigerator.
To secure safe and correct servicing, read this manual thoroughly in advance and check
if there are protective equipment and appropriate tools and service parts ready as well
as technical skills necessary to perform servicing.
May lead to death or serious injury if failed to comply with this
precaution
May lead to injury if failed to comply with this precaution
Lead to failure of the refrigerator set or its components if failed
to comply with this precaution
WORK TIPS

1.
SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
1
■ Specifications Table ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
1
■ Exterior / Interior Dimensions ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
3
2.
INSTALLATION A REFRIGERATOR ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
4
■ How to Install the Refrigerator ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
4
■ Temperature Setting ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
4
■ Electric Power Sources ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 
5
■ Onboard Direct Wiring with Optional Kit ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
6
■ Wiring Diagram of Dual Battery Hookup ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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3.
PART NAME ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
7
■ MT35F / MT45F ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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4.
CONNECTING DIAGRAM ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
8
■ Block Diagrams & Wiring Diagrams ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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5.
TROUBLE SHOOTING ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
9
■ Error Message (Digital display of temperature controller)・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
9
■ Trouble flowchart ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
9
・Refrigerator is too Cold ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 
9
・Does not get Cold ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
10
・Cooling is Weak ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 
11
・Typical Problem ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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・Technical Data ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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6.
CHECK POINT ＆ CHECK METHOD ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
13
【Check 1】 Special Fuse & Blade Fuse ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
13
【Check 2】 Output Voltage of the Compressor ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
13
【Check 3】 Check the Resistance at the Coil if Compressor. ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
13
【Check 4】 Resistance of Thermistor ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ .
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【Check 5】 Resistance of Control Assy ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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【Check 6】 Compressor Rated Current ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
15
【Check 7】 Resistance of Thermistor ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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7.
REPLACING PARTS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
16
【How to Replace Cooling Unit 】 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
16
【How to Replace Power Supply】 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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【Change Battery for Thermometer】・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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【How to Replace Fan Motor】 ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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CONTENTS

■ Specifications Table
MT35F-G4-P MT45F-G4-G MT45F-G4-P MT45F-G4-L
0642 032 0T60 0642 042 0T52 0642 042 0T60 0642 042 0T70
STORAGE VOLUME ℓ （liter） 32
in 14.3×16.1×25.5
mm 364×408×648
in 10.6×10.6×15
mm 270×270×380
CABINET
DOOR
CABINET
DOOR
DOOR
CABINET
AC
DC
DC12V
DC24V
AC
LBS. 46.3
Kg 21
※1 We took the largest mesurement ( including latch and handles)
※2 At an ambient temperature of 30℃ with the refrigerator door closed
14.3×20×25.5
10.6×14.6×15
RATED AMPERAGE
−18 ℃ or lower
SK511P (K3)
1.3A
0.35A
MODEL CODE
REFRIGERANT
HFC-134a
40
364×508×648
1. SPECIFICATIONS
OUTER
ENCLOSURE
COMPRESSOR MODEL
INTERIOR
DIMENSIONS
W×H×D ※1
2.6A
EXTERIOR
DIMENSIONS
W×H×D ※1
240V
MODEL
INPUT VOLTAGE
12/24V
270×370×380
1
INPUT VOLTAGE
RANGE OF POWER
SUPPLY
DC
11V～32V
WEIGHT
24
52.9
HEAT INSULATOR
Painted steel plate
Foamed Polyurethane (Cyclopentane)
INNER ENCLOSURE
A.B.S.Resin
COMPRESSOR RATING
TEMPERATURE CONTROL
AC 15V, 1.8A, 27W
Automatic temperature control by dial setting (Electronic
thermostat control type)
8℃±3℃
by Thermostat control NOTCH 1
TEMPERATURE CONTROL
NOTCH 5 OR FREEZE ※2
AVERAGE INNER
TEMPERATURE ※2

■ Specifications Table
STORAGE VOLUME ℓ （liter）
in
mm
in
mm
CABINET
DOOR
CABINET
DOOR
DOOR
CABINET
AC
DC
DC12V
DC24V
AC
LBS.
Kg
※1 We took the largest mesurement ( including latch and handles)
※2 At an ambient temperature of 30℃ with the refrigerator door closed
MT35F-U1D-P
14.3×16.1×25.5
364×408×648
10.6×10.6×15
270×270×380
52.9
46.3
14.3×20×25.5
364×508×648
10.6×14.6×15
270×370×380
32
0642 032 0310
TEMPERATURE CONTROL
Automatic temperature control by dial setting
(Electronic thermostat control type)
WEIGHT
2
24
21
REFRIGERANT
HFC-134a
AVERAGE INNER
TEMPERATURE ※2
8℃±3℃
by Thermostat control NOTCH 1
TEMPERATURE CONTROL
NOTCH 5 OR FREEZE ※2
−18 ℃ or lower
INPUT VOLTAGE
RANGE OF POWER
SUPPLY
DC
11V～32V
COMPRESSOR MODEL
SK511P (K3)
COMPRESSOR RATING
AC 15V, 1.8A, 27W
HEAT INSULATOR
Foamed Polyurethane (Cyclopentane)
INPUT VOLTAGE
120V
12/24V
RATED AMPERAGE
2.5A
1.3A
0.71A
INTERIOR
DIMENSIONS
W×H×D ※1
OUTER
ENCLOSURE
Painted steel plate
INNER ENCLOSURE
A.B.S.Resin
1. SPECIFICATIONS
MODEL
MODEL CODE
EXTERIOR
DIMENSIONS
W×H×D ※1
MT45F-U1D-P
0642 042 0R04
40

■ Exterior / Interior Dimensions
※ Tolerance is omitted
Unit (mm)
・MT35F
・MT45F
1. SPECIFICATIONS
3
270
408
648
364
648
364
508
380
270
370
380
270

■ How to Install the Refrigerator.
(1) Your shockproof fridge is best installed on a solid surface.
(2) Be sure your fridge is not placed near a gas stove, heater or other
heat-generating appliances.
(3) Adequate ventilation and suitable distance from each wall (at least 150mm or more)
is necessary for the maximum cooling efficiency and minimum electric current consumption for
"free standing use"( see Fig.1 shown below).
(4) Avoid installing your fridge close to kitchen sink or faucet.
(5) If you use the fridge under the counter or in the fixing box, please note the
following air ventilation conditions.
① Make vent opening both under fridge or bottom and above fridge top cover.
■ Temperature Setting
Turn the temperature setting knob to change the air temperature inside the refrigerator.
*
5
4
② Vent opening size must be larger than 160㎠ for each opening ( the more air circulation over the
condenser, the more efficiently fridge will operate).
Inside temperature *
OFF (Stop)
Approx. -18℃
at an ambient temperature of 30℃ with the refrigerator
door closed
2. INSTALLATION A REFRIGERATOR
Temp setting position
0
1
2 - 4
Approx. 5℃
Approx. 0℃ - 12℃
Failure to provide the necessary venting will result in poor refrigeration, continuous compressor
operation, accelerated battery discharge and sometimes shorten the life of fridge.
Top Cover Minimum Opening
Wall or Box Case
At least 150mm
From Each Wall
Floor or Box Bottom Minimum Opening
WORK TIPS
(Fig 1)

■ Electric Power Sources
Connect only to either of the following power sources:
• 240V AC from wall outlet (U1D type is AC120V)
• 12V or 24V DC battery.
＊This plug is for DC12V only (Fig 2). DC24V is the other cord (option).
＊DC BATTERY OPERATION (POLARITY GUARD)
If reverse polarity does occur, the special thermal fuse will blow and become inoperable.
＊
＊
Pay due attention to the correct polarity, the inner contact of cigarette lighter socket adapter must be
connected to the positive supply, while the outer (negative) contact is connected to earth.
(Most modern vehicles are wired on the negative earth system, but there may still be older vehicles and
imported ones with the positive to earth connections).
5
AC and DC voltages may be connected simultaneously, when AC will be automatically selected if both
voltages are applied.
2. INSTALLING A REFRIGERATOR
If the voltage is too high it will damage the product. If it’s too low, the cooling efficiency will be reduced,
the running time will increase and the battery will be subjected to an increased load.
In order to protect the power supply from damage caused by reversed polarity, the product is fitted with
an automatic polarity guard. Should incorrect polarity be applied, the green power lamp will not light up and
the product will not operate.
The serviceability of the special thermal fuse can only be checked by testing it's continuity with a
multimeter.
Following the correction of the current supply, the green power lamp will light up and normal operation will
resume.
When not using the product, remove the cigarette lighter plug of the cord from the cigarette lighter socket
of the vehicle to prevent unnecessary drainage of the car battery.
(Fig 2)

■ Onboard Direct Wiring with Optional Kit
(1) Twisting lead wire
(2) Connecting refrigerator directly to battery
(3)
(4)
(5)
■ Wiring Diagram of Dual Battery Hookup
Any switches and lead wires for other electrical equipment should not be shared with the wiring between the
refrigerator and the battery. (Other equipment can generate high voltage pulses which may cause transistor
damage to the refrigerator power supply. (See Fig 3)
Distance Between
Refrigerator And Battery
Less than 6m
SWG#18 (AWG#16) / 1.25㎟
SWG#16 (AWG#14) / 2.1㎟
The wiring diagram shown below is
recommended for dual battery hookup.
(See Fig 5)
2. INSTALLATION A REFRIGERATOR
SWG#14 (AWG#12) / 3.3 ㎟
Selecting the correct gauge for wiring is important to avoid voltage drop. Follow the chart below when wiring the
refrigerator to the battery.
To prevent radio noise and avoid absorbing high surge frequency, insert a capacitor of 10000μ-F as shown in fig 4
below.
To avoid burn of wires between the battery and the refrigerator in the event of a short circuit, install a 10A fuse
in the wiring circuit nearer to the battery.
To further reduce the radio interference during DC operation, twist the negative and positive cables (use separate
cables) together into a spiral form, between thebattery and the DC outlet socket.
Wire Gauge
DC 12 VOLT SERIES
SWG#16 (AWG#14) / 2.1㎟
6
From 6m to 10m
More than 10m
(Not recommended - too long)
SWG#14 (AWG#12) / 3.3㎟
SWG#12 (AWG#10) / 5.3㎟
Wire Gauge
DC 24 VOLT SERIES
To avoid damage to the refrigerator in the
event of reverse polarity or short circuit,
install a 15A fuse (12V DC) or a 10A fuse
(24V DC) in the wiring circuit nearer to the
battery.
WORK TIPS
(Fig 3)
(Fig 4)
(Fig 5)

■ MT35F / MT45F
3. PART NAME
7