Midea UL-BD386WE-SQ User manual

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Service Manual
Applicable models
Model No.
UL-BD386WE-SQ
22031010000841
UL-BD481WE-ST
22031010001001
UL-BD594WE-ST
22031010000981
UL-BD594WE-ST
92031010Z00041
UL-BD594WE-ST
92031010Z00042
UL-BD481WE-ST
92031010Z00043
UL-BD481WE-ST
92031010Z00045
(The picture is only for reference, and specific appearance and configuration are subject to the real
product)
Prepared by
R&D:Wang Pingchun
Reviewed by
QA:Wang Tao
SVC:Zhang Kun
Approved by
R&D:Geng Xiuhua
SVC:Guang Taoshuai

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Important Safety Notice
The Maintenance Manual is only for the use of maintenance personnel with certain experience and
background in electrical, electronic and mechanical field.
Any attempt to repair main devices may lead to personal injury and property loss.
Manufacturers or distributors are not responsible for the content of the Manual and interpretation
thereof.
Midea Refrigerators
Technical Maintenance Manual
Copyright @2016
All rights reserved. Replication of all or part of the Manual in any forms shall not be allowed without
written approval by the Overseas Sales Corporation of Midea Refrigerators.

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Contents
1.SAFETY WARNING CODE .........................................................................................................5
1.1WARNING FOR OPERATION SAFETY...................................................................................................5
1.2SAFETY INSTRUCTION FOR REFRIGERANT.........................................................................................8
2.DESCRIPTION FOR PRODUCT FEATURES............................................................................9
3.INSTALLATION AND COMMISSIONING .............................................................................. 10
3.1HANDLING .....................................................................................................................................10
3.2DISASSEMBLY (NONE)....................................................................................................................10
3.3 INSTALLATION LOCATION ..............................................................................................................10
3.4 LEVELING OF THE REFRIGERATOR..................................................................................................10
3.5CHANGE THE DOOR OPENING DIRECTION(NONE)............................................................................11
3.6 INSTALLATION OF HANDLE ............................................................................................................11
3.7 INSTALLATION OF DOOR LOCK（NONE）......................................................................................11
3.8ADJUSTMENT TO LEVEL THE DOOR（NONE）...............................................................................11
3.9ADJUSTMENT TO SHELVES（NONE）............................................................................................11
4.TERMS........................................................................................................................................ 12
4.1 DEFINITION OF MODEL(NONE)......................................................................................................12
4.2LOCATION OF NAMEPLATE..............................................................................................................12
5.PRODUCT SPECIFICATION .................................................................................................... 13
5.1 TYPESPECIFICATION(NONE)...........................................................................................................13
5.2 ELECTRICAL PARAMETERS.............................................................................................................13
5.3INSIDE TEMPERATURE ....................................................................................................................14
5.4DEFROSTING PARTS ........................................................................................................................14
5.5CIRCUIT DIAGRAM..........................................................................................................................14
6.INTERNAL VIEWAND DIMENSION ...................................................................................... 15
6.1MAIN PARTS AND THEIR NAMES......................................................................................................15
6.2EXTERNAL DIMENSION...................................................................................................................16
7.1 REFRIGERATING PIPING SYSTEM ....................................................................................................18
7.2CIRCULATING ROUTE OF COOLING AIR............................................................................................19
8. DISMANTLING OF PARTS...................................................................................................... 20
8.1 PARTS ON THE DOOR......................................................................................................................20
8.2PARTS INSIDE THE REFRIGERATOR ..................................................................................................20
8.3LIGHT SYSTEM ...............................................................................................................................21
8.4AIR DUCTAND FAN MOTOR.............................................................................................................22
8.5EVAPORATOR AND TEMPERATURE SENSING SYSTEM .......................................................................23
8.6COMPRESSOR CASE ........................................................................................................................25
8.7DISPLAYAND MAIN CONTROL PANEL..............................................................................................26

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8.8 BAR COUNTER(NONE)...................................................................................................................27
8.9 WATER DISPENSER(NONE).............................................................................................................27
8.10 ICE MAKER(NONE)......................................................................................................................28
9. FUNCTION AND OPERATION9.1 OPERATION PANEL...........................................................................29
9.2 TEMPERATURE SETTING.................................................................................................................29
9.3ALARM...........................................................................................................................................30
9.4 FAULT CODE AND SOLUTIONS ........................................................................................................31
9.5TEST MODE.....................................................................................................................................31
9.1SELF-DIAGNOSIS ............................................................................................................................32
10.CIRCUIT DESCRIPTION10.1 POWER SUPPLY....................................................................................33
10.2DOOR TRIP TEST CIRCUIT..............................................................................................................33
10.3TEMPERATURE TEST CIRCUIT........................................................................................................34
10.4FAN MOTOR CIRCUIT OF THE FREEZING CHAMBER ........................................................................35
10.5REFRIGERATOR FAN MOTOR CIRCUIT (NONE)...............................................................................35
10.6CONDENSING FAN MOTOR CIRCUIT (NONE)..................................................................................35
10.7DAMPER MOTOR CIRCUIT (NONE)................................................................................................35
10.8RESISTANCE VALUE OF THE SENSOR (R/T)....................................................................................35
11.TROUBLESHOOTING METHOD........................................................................................... 37
11.1 NO REFRIGERATION .....................................................................................................................37
11.2 COMPRESSOR FAILURE.................................................................................................................38
11.3 DEFROSTING IS NOT WORKING.....................................................................................................39
11.4 FAN IN THE FREEZING CHAMBER IS ABNORMAL ...........................................................................40
11.5 DAMPER IS ABNORMAL(NONE)11.6 LIGHTS INSIDE THE REFRIGERATOR DON’T LIGHT UP............41
12. FIGURES AND DETAILS OF REPAIR PARTS(DOCUMENTS ARE PROVIDED
SEPARATELY)............................................................................................................................... 42
12.1 FIGURE........................................................................................................................................42
12.2 LIST OF PARTS AND COMPONENTS................................................................................................42
13APPENDIX:......................................................................................................................................43
13.1ELECTRICAL SCHEMATIC DIAGRAM .............................................................................................43
13.2REFRIGERATOR MAINTENANCE TOOLING AND EQUIPMENT AND MATERIAL..................................43

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1.Safety Warning Code
1.1Warning for operation safety

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1.2Safety instruction for refrigerant

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2.Description for product features
This product is provided with following features:
(The
picture is only for reference, and specific appearance and configuration are subject to the real
product)
1）Support WIFI
2）Electrical temperature control and LED display screen
3）Mode conversion of refrigerator and freezer
4）LED light inner
5）The adjustable wire shelf
6）High temperature alarm
7）E-star energy consumption

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3.Installation and commissioning
3.1Handling
1) Protecttherefrigeratorinmovingit
Sameasshownasleftphoto,pleasemoveitbyhandcartwi
thcushion
2) Removeallpackingmaterialsandbottomcushion,then
moveintohouseforplacement
3) Aftermovingittoappropriatelocation,waitfor2hoursbe
forepoweron.
3.2Disassembly (None)
The refrigerator door needs to be dismantled if it cannot enter the room in the whole.
3.3 Installation location
Location that is easy for ventilation shall be
chosen to facilitate heat dissipation, enhance
its performance and reduce the energy
consumption.
3.4 Leveling of the refrigerator
If the refrigerator cannot be placed steadily,
adjust the footing to level it.

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3.5Change the door opening direction(None)
3.6 Installation of handle
1.Take out ①,use a cross screwdriver to drive①into the screw hole②on the door body and
tighten it.
2.Align the screw hole on the handle with the tightened ①to fix the handle;
3.Tighten ③on the handle side;
4.Put ④onto the handle side hole ③to complete handle installation.
3.7 Installation of door lock（None）
3.8 Adjustment to level the door（None）
3.9 Adjustment to shelves（None）

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4.Terms
4.1 Definition of model(None)
4.2Location of nameplate
(The picture is only for reference, and specific appearance and configuration are subject to the real
product)

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5.Product specification
5.1 typespecification(None)
5.2 Electrical parameters
Product Name
UL-BD481WE-ST
UL-BD594WE-ST
UL-BD386WE-ST
Product Code
22031010000841
Name
Item
Type
Specification
Specification
Specification
Compressor
Compressor
/
EE50H1B
EE55H1A-U
EE50H1C
Starter
PTC
MPT36A04
8EA14C3
8EA14C3-02
MTP42A04
8EA14C3
8EA14C3-02
QPE2-A4R7MD3
Overload
protector
OLP
4TM302TFBYY
4TM319TFBYY
QRB31T61A1
Winding
resistance of
compressor
wiring terminal
Rmc:10-20Ω
Rsc:30-50Ω
Rms=Rmc+Rsc
Rmc:10-20Ω
Rsc:30-50Ω
Rms=Rmc+Rsc
Rmc:10-20Ω
Rsc:30-50Ω
Rms=Rmc+Rsc
Variable
frequency
driver board
/
/
/
/
Motor
Fan motor of the
freezing
chamber
DC
DC12V
DC12V
DC12V
Ventilation door
of the
refrigerating
chamber
/
/
/
/
Condensation
fan
/
/
/
/
Lights inside
the
refrigerator
Lights inside the
freezing
chamber
LED
DC12V
DC12V
DC12V
Lights inside the
refrigerating
chamber
/
/
/
/
Switch of the
refrigerator
door
mechanicalswitch
Cylindrical
switch
Cylindrical
switch
Secto switch

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5.3Inside temperature
Temperature tolerance ≤ 2 oC
Compartment
The highest (oC)
Lowest (oC)
Freezing
-12
-20
Refrigerating
/
/
Variable temperature
/
/
5.4Defrosting parts
Defrosting period
Initial defrosting period
Normal defrosting period
/
/
Defrosting sensor
NTC
B3839
Thermal fuse
Can’t be restored
77oC
Defrosting heater in freezing chamber
Steel pipe
115V/200W
115V/180W
5.5Circuit diagram
UL-BD481WE-ST\UL-BD594WE-ST
UL-BD386WE-SQ_22031010000841

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6.Internal view and dimension
6.1Main parts and their names
UL-BD481WE-ST
UL-BD594WE-ST

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①Upper air duct cover
②Steel wire shelf
③Bottom air duct cover
④Steel wire drawer
⑤Door switch
⑥Door tray
UL-BD386WE-SQ_22031010000841
1.Front air duct cover2.Steel wire shelf(big)3.FRZ. air
duct component
4.Steel wire shelf(small)5.Steel wire drawer
6.adjustable feet
7.Door tray8.Door tray9.Door tray
(The picture is only for reference, and specific appearance and configuration are subject to the real product)
6.2External dimension
Front view
UL-BD481WE-ST
UL-BD594WE-ST
UL-BD386WE-SQ_22031010000841
Side view
UL-BD481WE-ST
UL-BD594WE-ST
UL-BD386WE-SQ_22031010000841

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(The picture is only for reference, and specific appearance and configuration are subject to the real
product)
Down view
Open Door
Maximum open angle of door 135°

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7.Refrigerating piping system and circulating route of cooling air
7.1 Refrigerating piping system
1Compressor→2Exhaust transition pipe→3Left condenser→4Anti-condensationg tube→5Back
condenser→6Right condenser→7Dry filter→8Capillary tube→9Evaporator→10Suction
pipe→11Return transition pipe→2Compressor
(The picture is only for reference, and specific appearance and configuration are subject to the real
product)

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7.2Circulating route of cooling air
(The picture is only for reference, and specific appearance and configuration are subject to the real
product)

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8. Dismantling of parts
8.1 Parts on the door
Door seal
Door seal is installed into door liner groove.
1）Open the refrigerator door;
2）Take the door seal ①out of door liner;
Door tray
Lift up the bottle frame and take it out from the door
liner of the refrigerator.
rollover beam
None
8.2Parts inside the refrigerator
Refrigerator Fruit box cover
None
Shelves
1）Pull out the partition plate completely.
2）Lift it up and take it out from the refrigerator.
Ice tray
None
Refrigerator tray
None
Drawer