Midea COMPACT Series User manual

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Service Manual
COMPACT SERIES
(The picture in this service manual is only for reference, and specific appearance and configuration are
subject to the real product)
Applicable Models
Model Code
UR-BD186-DQ
22031010001841
Prepared by
R&D:Liu Ya
Reviewed by
QA:Gao Hongbing
SVC: Zhang Kun
Approved by
R&D:Liu Chao

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WARNING
Important Safety Notice
There are special components used in this equipment which are important for safety. These parts are marked
by in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is
essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire
or other hazards. Do not modify the original design without permission of manufacturer.
WARNING
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 @2017
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
1.2 SAFETY INSTRUCTION FOR REFRIGERANT................................................................................................................. 7
2. DESCRIPTION FOR PRODUCT FEATURES..................................................................................................... 8
3. INSTALLATION AND COMMISSIONING............................................................................................................ 9
3.1 HANDLING................................................................................................................................................................... 9
3.2 DOOR DISASSEMBLY AND ASSEMBLY ........................................................................................................................ 9
3.3 INSTALLATION LOCATION ............................................................................................................................................ 9
3.4 LEVELING OF THE REFRIGERATOR............................................................................................................................. 9
3.5 DOOR REVERSAL...................................................................................................................................................... 10
3.6 INSTALLATION OF HANDLE........................................................................................................................................ 11
3.7 INSTALLATION OF DOOR LOCK.................................................................................................................................. 11
3.8ADJUSTMENT TO LEVEL THE DOOR .......................................................................................................................... 11
3.9ADJUSTMENT TO SHELVES ....................................................................................................................................... 11
4. TERMS...................................................................................................................................................................12
4.1 DEFINITION OF MODEL (NONE)................................................................................................................................ 12
4.2 LOCATION OF NAMEPLATE (NONE).......................................................................................................................... 12
5. PRODUCT SPECIFICATION...............................................................................................................................13
5.1 TYPE SPECIFICATION(NONE)................................................................................................................................... 13
5.2 ELECTRICAL PARAMETERS....................................................................................................................................... 13
5.3 INSIDE TEMPERATURE.............................................................................................................................................. 14
5.4 DEFROSTING PARTS................................................................................................................................................. 14
5.5 CIRCUIT DIAGRAM .................................................................................................................................................... 15
6. INTERNAL VIEW AND DIMENSION ..................................................................................................................16
6.1 MAIN PARTS AND THEIR NAMES................................................................................................................................ 16
6.2 EXTERNAL DIMENSION ............................................................................................................................................. 17
7. REFRIGERATING PIPING SYSTEM AND CIRCULATING ROUTE OF COOLING AIR................................18
7.1 REFRIGERATING PIPING SYSTEM ............................................................................................................................. 18
7.2 CIRCULATING ROUTE OF COOLING AIR(NONE)........................................................................................................ 18
8. DISMANTLING OF PARTS..................................................................................................................................19
8.1 PARTS ON THE DOOR................................................................................................................................................ 19
8.2 PARTS INSIDE THE REFRIGERATOR .......................................................................................................................... 19
8.3 LIGHT SYSTEM.......................................................................................................................................................... 20
8.4AIR DUCT COMPONENTS REFRIGERATING CHAMBER............................................................................................... 20
8.5AIR DUCT COMPONENTS IN FREEZING CHAMBERAND FAN MOTOR.......................................................................... 20
8.6 EVAPORATOR AND TEMPERATURE SENSING SYSTEM .............................................................................................. 20

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8.7 COMPRESSOR CASE ................................................................................................................................................ 21
8.8 DISPLAY CONTROL BOARD ....................................................................................................................................... 26
8.9 MAIN CONTROL BOARD ............................................................................................................................................ 26
8.10 BAR COUNTER........................................................................................................................................................ 26
8.11 WATER DISPENSER................................................................................................................................................. 26
8.12ICE MAKER .............................................................................................................................................................. 26
9. FUNCTION AND OPERATION............................................................................................................................27
9.1OPERATION PANEL ................................................................................................................................................... 27
9.2 TEMPERATURE CONTROL......................................................................................................................................... 27
9.3 GIVE AN ALARM (NONE)........................................................................................................................................... 27
9.4 FAILURE CODE AND SOLUTIONS (NONE).................................................................................................................. 27
9.5 DEFROST FUNCTION................................................................................................................................................. 27
9.6 COMPRESSOR FAN CONTROL (NONE)..................................................................................................................... 27
10. CIRCUIT DESCRIPTION ...................................................................................................................................28
10.1 POWER SUPPLY(NONE)......................................................................................................................................... 28
10.2 TEST CIRCUIT FOR DOOR SWITCH(NONE)............................................................................................................. 28
10.3 TEMPERATURE TEST CIRCUIT(NONE).................................................................................................................... 28
10.4 FREEZER CHAMBER FAN MOTOR CIRCUIT (NONE)................................................................................................. 28
10.5 REFRIGERATING CHAMBER FAN MOTOR CIRCUIT (NONE)...................................................................................... 28
10.6 CONDENSATION FAN CIRCUIT (NONE)................................................................................................................... 28
10.7 FAN MOTOR CIRCUIT OF THE VENTILATION DOOR(NONE)...................................................................................... 28
10.8 RESISTANCE VALUE OF THE SENSOR (R/T) (NONE).............................................................................................. 28
11. TROUBLESHOOTING METHOD......................................................................................................................29
11.1 NOT COOLING......................................................................................................................................................... 29
11.2 NOT WORKING OF COMPRESSOR........................................................................................................................... 30
11.3 THERMOSTAT MALFUNCTION-UNDERCOOLING...................................................................................................... 30
11.4 LIGHT IS NOT ON(NONE)........................................................................................................................................ 31
11.5 NOISE..................................................................................................................................................................... 31
12. FIGURES AND DETAILS OF REPAIR PARTS(DOCUMENTS ARE PROVIDED SEPARATELY) .............31
12.1 FIGURES................................................................................................................................................................. 31
12.2 LIST OF PARTS AND COMPONENTS......................................................................................................................... 31
13. APPENDIX...........................................................................................................................................................32
13.1 REFRIGERATOR MAINTENANCE TOOLINGAND EQUIPMENTAND MATERIAL............................................................ 32

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1. Safety Warning Code
1.1 Warning for operation safety
Important Safety Instructions
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol indicates that dangerous voltage
constituting a risk of electric shock is present
within your freezer.
This symbol indicates that there are important
operating and maintenance instructions in the
literature accompanying your freezer.
WARNING
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this appliance near water.
6) Clean only with a damp cloth.
7) Do not block any ventilation openings.
8) Install in accordance with the manufacturer’s instructions.
9) Do not install near any heat sources, such as radiators, heat registers, stoves, or
other apparatus that produce heat.
10) Do not defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replacement
of the obsolete outlet.
11) Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the appliance.
12) Do not attempt to modify or extend the power cord of this appliance.
13) Unplug this appliance during lightning storms or when it will not be used for long
periods of time.
14) Make sure that the availableAC power matches the voltage requirements of this
appliance.

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CONNECTING ELECTRICITY
Electrical Shock Hazard.
Plug into a grounded 3-prong outlet.
Do not remove the ground prong.
Do not use an adapter.
Failure to follow these instructions can
result in death, fire, or electrical shock.
WARNING
Electric Shock Hazard
Failure to follow these instructions can result in electric shock, fire, or
death.
1) WARNING–Keep ventilation openings, in both the freezer and the built-in structure,
clear of obstruction.
2) WARNING–Do not touch the interior of the freezer with wet hands. This could result
in frost bite.
3) WARNING–Do not use mechanical devices or other means to accelerate the
defrosting process, other than those recommended by the manufacturer.
4) WARNING–Do not damage the refrigerant circuit.
5) WARNING–Do not damage the refrigerant tubing when handling, moving, or using
the freezer.
6) WARNING–DANGER–Never allow children to play with, operate, or crawl inside the
freezer. Risk of child entrapment. Before you throw away your old freezer:
6-1) Take off the doors
6-2) Leave the shelves in place so that children may not easily climb inside
7) Unplug the freezer before carrying out user maintenance on it.
8) This freezer can be used by children age eight years and older and persons with
reduced physical or mental capabilities or lack of experience and knowledge if they are
given supervision or instruction concerning the use of the freezer in a safe way and
understand the hazards involved. Children should not play with the freezer. Cleaning and
maintenance should not be performed by children without supervision.
9) If a component part is damaged, it must be replaced by the manufacturer, its service
agent, or similar qualified persons in order to avoid a hazard.
10) Please dispose of the freezer according to local regulations as the freezer contains
flammable gas and refrigerant.
11) Follow local regulations regarding disposal of the freezer due to flammable
refrigerant and gas. All refrigeration products contain refrigerants, which under the
guidelines of federal law must be removed before disposal. It is the consumer's
responsibility to comply with federal and local regulations when disposing of this product.
12) This freezer is intended to be used in household and similar environments.

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13) Do not store or use gasoline or any flammable liquids inside or in the vicinity of this
freezer.
14) Do not use extension cords or ungrounded (two-prong) adapters with this freezer. If
the power cord is too short, have a qualified electrician install an outlet near the freezer. Use
of an extension cord can negatively affect the freezer’s performance.
Grounding requirement
This freezer must be grounded. This freezer is equipped with a cord having a grounding
wire with a grounding plug. The plug must be inserted into an outlet that is properly installed
and grounded.
Improper use of the grounding plug can result in a risk of electric shock. Consult a
qualified electrician or service person if the grounding instructions are not completely
understood, or if doubt exists as to whether the freezer is properly grounded.
1.2 Safety instruction for refrigerant
Explosion Hazard.
Keep flammable materials and vapors, such as gasoline, away from freezer. Failure to do so
can result in fire, explosion, or death.
Safety instruction for refrigerant
DANGER–Risk of Fire or Explosion. Flammable Refrigerant Used. To Be Repaired Only By
Trained Service Personnel. Do Not Use Mechanical Devices. Do Not Puncture Refrigerant
Tubing. CAUTION–Risk of Fire or Explosion. Flammable Refrigerant Used. Consult Repair
Manual/Owner’s Guide Before Attempting To Service This Product. All Safety Precautions
Must be Followed. CAUTION–Risk of Fire or Explosion. Dispose of Properly In Accordance
With Federal Or Local Regulations. Flammable Refrigerant Used. CAUTION–Risk of Fire or
Explosion Due To Puncture Of Refrigerant Tubing; Follow Handling Instructions Carefully.
Flammable Refrigerant Used.

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2. Description for product features
This product is provided with following features:
1）Mechanical temperature control
2）Cooling evenly and quickly;
3）Shelf design, increase storage space
4）Change the door opening direction

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3. Installation and commissioning
3.1 Handling
Handling
1)Protect the refrigerator in moving it,Same as shown as
left photo, please move it by handcart with cushion
2)Remove all packing materials and bottom cushion, the
n move into house for placement
3)After moving it to appropriate location, wait for 2 hours
before power on.
3.2 Door Disassembly and Assembly
The refrigerator door needs to be dismantled if it cannot enter the room in the whole.
Disassembly of Freezer door
Disassembly of Freezer door
None
Disassembly of refrigerator door
Disassembly of refrigerator door
None
3.3 Installation location
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
Leveling of the refrigerator

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If the refrigerator cannot be placed steadily, adjust the
footing to level it.
3.5 Door reversal
Door reversal
1) Fix the door by tapes.
1) 2) Dismantle hinge hole cap, the upper right hinge cover,
fitting screws of upper right hinge, and remove the upper
right hinge, please keep the door vertical in whole
process for avoiding falling.
2) 3) Remove the door.
3) 4) Dismantle the door stopper, and install it on other side.

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5) Dismantle the lower hinge and adjustable leg.
4) 6) Install the lower hinge and adjustable leg on lower left
side of cabinet.
7)Put the door on lower hinge vertically, and validate the
gas tightness of door gasket, take out the spare upper
left hinge and hinge cover from accessory bag, then
install the upper left hinge by fitting screws, finally to
install the hinge cover, and cover the hinge hole cap on
upper right side.
3.6 Installation of handle
Installation of handle
Installation of handle
None
3.7 Installation of door lock
Installation of door lock
Installation of door lock
None
3.8 Adjustment to level the door
Adjustment to level the door
Adjustment to level the door
None
3.9 Adjustment to shelves
Adjustment to shelves
Adjustment to shelves
None

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4. Terms
4.1 Definition of model (None)
4.2 Location of nameplate (None)

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5. Product specification
5.1 Type specification(None)
5.2 Electrical parameters
Product Name
UR-BD186-DQ
None
None
None
Product Code
22031010001841
None
None
None
Item
Specification
Specification
Specification
Specification
Compressor
Compressor
EZ75E1B-U
None
None
None
启动器 Starter(PTC)
QP2-4R7
None
None
None
Overload
protector(OLP)
DRB29T61A1
None
None
None
Winding resistance of
compressor wiring
terminal
Rmc:5.022-5.7785Ω
Rsc:6.7053-7.7147Ω
Rms=Rmc+Rsc
None
None
None
Winding resistance
picture
None
None
None
Variable frequency
driver board
None
None
None
None
The input power of
compressor
92.7W
None
None
None
Motor
Fan motor of the
freezing chamber
None
None
None
None
Ventilation door of the
refrigerating chamber
None
None
None
None
Condensation fan
None
None
None
None
separation the ice
motor
None
None
None
None
ice output motor
None
None
None
None
Open door motor
None
None
None
None
Lights inside the refrigerator
Lights inside the
freezing chamber
None
None
None
None
Lights inside the
refrigerating chamber
None
None
None
None
Switch of the
refrigerator door
None
None
None
None

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5.3 Inside temperature
Temperature tolerance ≤ 2 oC
Compartment
The highest (oC)
Lowest (oC)
Freezing
-12
-24
Refrigerating
None
None
Variable temperature
None
None
5.4 Defrosting parts
Item
Initial defrosting period
Normal defrosting period
Defrosting period
None
None
Defrosting sensor
None
None
Defrosting temperature
controller
None
None
Thermal fuse
None
None
Defrosting heater in freezing
chamber
None
None

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5.5 Circuit diagram

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6. Internal view and dimension
6.1 Main parts and their names
Freezer chamber
Refrigerator chamber
❶Thermostat box and assembly
❷Top shelves
❸Bottom shelf
None

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6.2 External dimension
Description
Code
Size (mm)
Height to Top of Case
A
1430
Width
B
545
Depth w/Handles
C
565
Depth (Total with Door Open)
D
1065
Width (door open 90 deg. w/ handle)
E
None

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7. Refrigerating piping system and circulating route of cooling air
7.1 Refrigerating piping system
❶Compressor→❷Right condenser→❸Anti-condensation tube→❹Left Condenser→❺Dry
filter→❻Capillary tube→❼Evaporator→❽Suction tube→❶Compressor
7.2 Circulating route of cooling air(None)

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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 out of door liner;
Guardrail
Guardrail
None
Door stopper
Door stopper
None
rollover beam
rollover beam
None
8.2 Parts inside the refrigerator
Drawer
Drawer
None
Refrigerator Fruit box cover
Refrigerator Fruit box cover
None
Shelves
The shelf is located at the freezing 1）Lift it up slightly and
take it out from the refrigerator.

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8.3 Light system
Light
Light
None
Light switch
Light switch
None
Pilot light
Pilot light
None
Fresh light
Fresh light
None
8.4 Air duct components refrigerating chamber
Air duct components refrigeratingchamber
Air duct components refrigeratingchamber
None
8.5 Air duct components in freezing chamber and fan motor
Disassembly and installation of Air duct
Disassembly and installation of Air duct
None
Fan motor of air duct
Fan motor of air duct
None
Damper assembly
Damper assembly
None
8.6 Evaporator and temperature sensing system
Evaporator in freezing chamber
Evaporator in freezing chamber
silk tube evaporator
Components on the evaporator
Defrost thermostat
None
Fuse
None
Defrost sensor
None
Defrost heater
None
Evaporator in refrigerating chamber
Evaporator in refrigerating chamber
None
Components on the evaporator
None
Sensor
Sensor in freezing chamber
None
Sensor in refrigerating chamber
None
Ambient temperature sensor
None
Sensor in Variable temperature chamber
None