Midea Service Manual

CHEST FREEZER SERIES

Applicable Models: UR-BD143-DQ

Model Code: 22032010003262

Prepared by: R&D: Huang Yanmin

Reviewed by: QA:WuXinbin SVC:Zhang Kun

Approved by: R&D:ZhangHuawei SVC:GuangTaoshuai

(The picture in this service manual is only for reference, and specific appearance and configuration are subject to the real product)

1. Safety Warning Code

1.1 Warning for operation safety

[Warning Symbol] 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.

[Warning Symbol] 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 available AC power matches the voltage requirements of this appliance.

CONNECTING ELECTRICITY

[Electric Shock Symbol] 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.

1.2 Safety instruction for refrigerant

[Warning Symbol] 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.

2. Description for product features

This product is provided with following features:

The product is a chest freezer. It features a fan-shaped temperature control panel and a top single opening design.

3. Installation and commissioning

3.1 Handling

Handling

1. Protect the refrigerator during moving, ideally using a handcart with cushioning.

2. Remove all packing materials and bottom cushion before moving the unit into its placement location.

3. After moving to the appropriate location, wait for 2 hours before powering on.

3.2 Door Disassembly and Assembly

The refrigerator door needs to be dismantled if it cannot enter the room in its entirety.

Disassembly of Freezer door
Disassembly of Freezer doorNone
Disassembly of refrigerator doorNone

3.3 Installation location

Installation location

Choose a location that is easy for ventilation to facilitate heat dissipation, enhance performance, and reduce energy consumption. Maintain a clearance of 20cm on the sides and 20cm at the back of the unit.

3.4 Leveling of the refrigerator

Leveling of the refrigerator

If the refrigerator cannot be placed steadily, adjust the footing to level it.

3.5 Door reversal

Door reversal
Door reversalNone

3.6 Installation of handle

Installation of handle

Parts required: 1- Handle, 2- M5*14 screws (two), 3- Screw hole cover (two).

1. Insert the handle below the display control board of the door, aligning with the screw hole.

2. Secure the handle using the screws.

3. Attach the screw hole covers onto the screw holes.

To install the lock loop: Fix the lock loop to its mounting hole near the frame in the front side plate of the box using an M4x20 or M4x8 screw, ensuring the countersunk side faces outwards. Hold the handle with the left hand, align its mounting hole with the door's mounting hole. Insert the key into the keyhole with the right hand and turn clockwise to drive the rotation of the lock hook. Adjust the handle position from side to side to ensure the lock hook engages the lock loop when locked. Finally, fix the handle to the door with four M5X16 screws. Install the handle cover.

3.7 Installation of door lock

Installation of door lock
Installation of door lockWith the door handle together

3.8 Adjustment to level the door

Adjustment to level the door
Adjustment to level the doorNone

3.9 Adjustment to shelves

Adjustment to shelves
Adjustment to shelvesNone

4. Terms

4.1 Definition of model (None)

4.2 Location of nameplate(None)

5. Product specification

5.1 Type specification(None)

5.2 Electrical parameters

ItemSpecificationSpecificationSpecificationSpecification
Product NameUR-BD143-DQ
Product Code22032010003262
CompressorFZ59E1HNoneNoneNone
Starter(PTC)QP2-4R7NoneNoneNone
Overload protector(OLP)DRB29T61A1NoneNoneNone
Winding resistance of compressor wiring terminalRmc:7.02-8.08Ω Rsc:8.88-10.22Ω Rms=Rmc+RscNoneNoneNone
Winding resistance picture[Diagram showing R/M, S, C connections]NoneNoneNone
Variable frequency driver boardNoneNoneNoneNone
Motor
Fan motor of the freezing chamberNoneNoneNoneNone
Ventilation door of the refrigerating chamberNoneNoneNoneNone
Condensation fan separation the ice motorNoneNoneNoneNone
ice output motorNoneNoneNoneNone
Open door motorNoneNoneNoneNone
Lights
Lights inside the freezing chamberNoneNoneNoneNone
Lights inside the refrigerating chamberNoneNoneNoneNone
Switch of the refrigerator doorNoneNoneNoneNone
Indicator lampNoneNoneNoneNone

5.3 Inside temperature

Temperature tolerance ≤ 2°C

CompartmentThe highest (°C)Lowest (°C)
Freezing-12-28
RefrigeratingNoneNone
Variable temperatureNoneNone

5.4 Defrosting parts

ItemInitial defrosting periodNormal defrosting period
Defrosting periodNoneNone
Defrosting sensorNoneNone
Defrosting temperature controllerNoneNone
Thermal fuseNoneNone
Defrosting heater in freezing chamberNoneNone

5.5 Circuit diagram

[Circuit diagram showing connections between L, E, Protector, Thermostat, Fan Motor, and other components.]

6. Internal view and dimension

6.1 Main parts and their names

Freezer chamber

1 Door shell7 Levelling feet
2 The door end cover8 Compressor mounting panel
3 Door gasket9 Temperature-control panel
4 Door liner10 Hinge
5 Cabinet assembly11 Lamp cover
6 Drain-pipe cover12 Door handle

[Diagram illustrating the internal and external parts of the freezer, numbered 1 through 12.]

6.2 External dimension

DescriptionCodeSize (mm)Size (mm)
Height to Top of CaseA845None
WidthB635None
Depth/HingeC555None
DepthD540None
Height (Door open)E1330None

[Diagram showing external dimensions labeled A, B, C, D, E.]

7. Refrigerating piping system and circulating route of cooling air

7.1 Refrigerating piping system

[Diagram of the refrigerating piping system with numbered components: 1 Compressor, 2 Right condenser, 3 Left Condenser, 4 Dry filter, 5 Capillary tube, 6 Evaporator.]

7.2 Circulating route of cooling air

[Diagram illustrating the path of cooling air circulation within the freezer compartment.]

8. Dismantling of parts

8.1 Parts on the door

Door seal

1. Pull the door seal from the corner.

2. Apply effort until the door seal completely detaches from the door inner liner groove, then remove the door seal.

3. Secure the four corners and press smoothly.

The hinge cover

1. Open the upper hinge of the lower hinge cover by hand to a certain angle until the hinge cover is separated from the main body.

2. Pull down the lower hinge cover.

3. Open the slanted upward hinge cover to a certain angle using a screwdriver and remove the hinge cover. Wear safety gloves for protection against cuts.

4. When the door is closed, open the lower hinge cover along the side wall to a suitable angle and push forwards into the side wall of the hinge until the hinge cover boss completely falls into the hinge hole.

5. Hold the side of the upper hinge cover with both hands, align the opening with the side wall of the hinge, and push down until the hinge cover protrusion completely falls into the hinge hole. Ensure the upper and lower hinge covers are properly in place.

Door light disassembly and assembly

Door light disassembly and assembly
Door light disassembly and assemblyNone

8.2 Parts inside the refrigerator

Basket

Open the door and remove the basket.

Inside water pipe cover

Counterclockwise to remove the pipe cover.

Ice tray

Ice tray
Ice trayNone

8.3 Light system

Light
LightNone
Light switchNone
Indicator lampNone

8.4 Evaporator and temperature sensing system

Freezer sensor
Freezer sensorNone
Ambient temperature sensorNone
Thermostatmachine

8.5 Condenser system

Condenser
CondenserInside

8.6 Compressor case

shutter and compressor case

Pull down the screw, open the shutter.

Compressor and the cooling system pipe

1. Cut off the compressor pipeline (1), process pipeline (2), low-pressure muffler (3), and high-pressure exhaust pipe.

2-1. Remove the screws (for some models): two screws outside, one screw inside.

2-2. Remove the metal clamp (for some models): Disassemble the metal clamp that fixes the electric appliance shield.

3. Remove the clipping strip: Slowly pull it out.

4. Remove the protective cover: Pry the protective cover slowly from the upper part, pull it out and remove it.

5. Remove the starter and protector: Unplug the starter and protector (use a screwdriver to pry it slowly).

6. Loosen the screw of the compressor bottom plate, and remove the floor together with the compressor from the box.

7. Use a wrench to remove the bolts by steps 4, 5, 6, 7. Replace the compressor and reverse the process for installation.

8. Use a pipe cutter to cut off the condenser tube (8), then shear off the capillary tube (9) using capillary tube scissors.

9. Replace the compressor and weld the compressor pipeline: weld the process pipeline (10), low-pressure muffler (11), and high-pressure exhaust pipe (12).

10. Replace the filter. Use Ag welding rod for Cu-Fe tubes welding (13) and Cu welding rod for Cu-Cu tubes welding (14).

11. Vacuum system: Ensure the degree of vacuum is below 6Pa.

12. Perfusion refrigerant.

13. Use vise grip pliers to clamp the middle of the process pipe, then seal weld the process tube (15, 16).

Piping system in the compressor case

1 Capacitor10 Compressor
2 -1 Front condenser pipeline-111 Suction Pipe
3 -2 Rear condenser pipeline-212 -1 Rear condenser pipeline-1
4 -1Anti-dew pipe-113 -2 Front condenser pipeline-2
5 Temperature-control box assembly14 -2Anti-dew pipe-2
6 Drying filter15 Compressor Assembly Board
7 Capillary
8 Protective cover
9 Wires

[Diagram illustrating the piping system in the compressor case with numbered components 1 through 15.]

Condenser fan motor

Fan motorNone
Standby condenserNone

8.7 Temperature-control box assembly view

Temperature-control box assembly view

Destuffing

1. Pull down the screw, open the shutter.

2. Pull out the temperature probe from the temperature tube.

3. Hold the two tabs on the back cover of the temperature-control box to remove the components.

4. Use a screwdriver to remove the two screws.

5. Separate the temperature-control box from the panel.

6. Pull out the control knob.

7. Pull out the fixed nut of the thermostat.

8. Pull out the wiring harness and indicator light. Remove the indicator light and thermostat. The reverse operation is for assembly.

9. Function and operation

9.1 Operation panel

IconsButton
1 Indicator hole cover/Power indicatorA freezer gear
B "OFF"

[Diagram of the operation panel showing controls labeled A and B, with a thermostat knob indicating MIN, MAX, and OFF settings.]

9.2 Temperature control

Control panel without indicator light

  1. Connect the freezer to power supply.
  2. The interior temperature of the freezer is adjusted through the thermostat knob. Clockwise rotation of the thermostat knob lowers the interior temperature. "MIN" is the warmest setting, "MAX" is the coldest setting.
  3. "OFF" stands for stopping working.

Control panel with indicator light

  1. Connect the freezer to power supply; the "Power" indicator (green light) will illuminate.
  2. The interior temperature of the freezer is adjusted through the thermostat knob. Clockwise rotation of the thermostat knob lowers the interior temperature. "MIN" is the warmest setting, "MAX" is the coldest setting.
  3. "OFF" stands for stopping working.

9.3 give an alarm

None

9.4 Defrosting

Unplug the freezer and open the freezer door. Remove foods and drawers before defrosting. Open the outflow holes and drainage holes (and place a water container at the outflow holes). Indoor frost will naturally melt; wipe the defrost water with a dry, soft cloth. When the frost softens, an ice scraper might be used to accelerate the de-icing process. Please remove the food and put it in a cool place when defrosting before removing accessories.

10. Circuit description

10.1 Power Supply(None)

10.2 Test circuit for door switch(None)

10.3 Temperature test circuit(None)

10.4 Freezer chamber fan motor circuit (None)

10.5 Refrigerating chamber fan motor circuit (None)

10.6 Condensation fan circuit (None)

10.7 Fan motor circuit of the ventilation door(None)

10.8 Resistance value of the sensor (R/T) (None)

11. Troubleshooting Method

11.1 Not cooling

[Flowchart for troubleshooting "No cooling" issues, detailing checks for power supply, light display, thermostat, compressor operation, compressor accessories, compressor winding, and piping leakage/blockage.]

Common phenomenon of no cooling:

  • The connector has a leak or the terminals are loose.
  • Defective protector or starter.
  • The connector is reversed, the timer is connected to the wrong line, or the timer is not reset.
  • Leakage of the refrigeration system, welding plugs, insufficient capillary depth of the dryer leading to a solder plug.

11.2 Not working of compressor

[Flowchart for troubleshooting "No working of compressor" issues, detailing checks for power supply, compressor power, thermostat, compressor accessories, and compressor winding.]

11.3 Thermostat malfunction-Undercooling

[Flowchart for troubleshooting "Thermostat malfunction-Undercooling" issues, detailing checks for thermostat knob position, throttle opening, thermostat function, and thermostat adjustment screw.]

11.4 Light is not on

[Flowchart for troubleshooting "Light is not on" issues, detailing checks for cooling, filament disconnection, wiring harness insertion, and door switch contact.]

11.5 Noise

[Flowchart for troubleshooting "Noise" issues, detailing checks for product stability, noise source confirmation (evaporator, compressor case, box body), pipeline collision, and compressor issues.]

12. Figures and details of repair

12.1 Figures

12.2 List of parts and components

13. Appendix

13.1 Refrigerator maintenance tooling and equipment and material

Tooling

No.NameMain UsagePhoto Description
1Phillips screwdriverScrew assemble and disassemble[Image of a Phillips screwdriver]
2Slotted screwdriver/scraperScrew and rivet assemble and disassemble[Image of a slotted screwdriver and scraper]
3Socket spanner 5/16"Hinge and compressor screw assemble and disassemble[Image of a socket spanner]
4SuckerDisplay panel and air duct cover disassemble[Image of a suction cup]
5Allen wrench (2.8~4mm)Handle assemble and disassemble[Image of Allen wrenches]
6Vise grip pliersSealing process tube[Image of vise grip pliers]
7Nipper pliers/diagonal pliersAssistive tooling[Image of nipper pliers/diagonal pliers]
8Capillary tube scissorsShear capillary[Image of capillary tube scissors]
9KnifeAssistive tool[Image of a utility knife]
10Pipe cutter, Flaring devicePipe cutting, flaring[Image of pipe cutting and flaring tools]
11Electronic digital thermometerTest temperature[Image of electronic thermometers]
12Multi meterMeasurement with resistance, voltage, current and so on.[Image of a multimeter]

Equipment

No.NameMain UsagePhoto Description
1Vacuum pump with gaugeVacuum pumping[Image of a vacuum pump with gauges]
2Electronic scaleWeighing refrigerant/gas[Image of an electronic scale]

Material

No.NameMain UsagePhoto Description
1Process pipelineCharge the refrigerant[Image of copper pipes]
2Dry filterInvolving a system failure to be replaced[Image of dry filters]
3Copper welding rodCopper-Copper tubes welding[Image of copper welding rods]
4Silver solder (>25%Ag)Not Copper-Copper tubes welding[Image of silver solder rods]
5Refrigerant/gasAdd refrigerant to the system[Image of a refrigerant tank]
6Adhesive tapeDoor fixing for reversing door[Image of adhesive tape]
7Transition copper pipeAluminium-Aluminium tubes welding, maintain lengthen tubes[Image of transition copper pipes]

Waste Disposal Information

The symbol on the product or its packaging indicates that this product must not be disposed of with your other household waste. Instead, it is your responsibility to dispose of your waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment. The separate collection and recycling of your waste equipment at the time of disposal will help conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more information about where you can drop off your waste for recycling, please contact your local authority, or where you purchased your product.

MIDEA After-Sales Support

MIDEA appliances after sales website

For more information about Midea appliances after sales, please visit the tsp.midea.com

For more information about the service manual, please visit the tsp.midea.com

For more information about the EV and SBOM, please visit the tsp.midea.com

How to login TSP system

Use Google browser visit the https://tsp.midea.com/

Internal User: Use MIP account and Password.

Customer: Access: Generated by TSP (provided by administrator). Password: abcd1234 (please revise after login in).

Midea Refrigerators

If you need to get detailed technical information from the manufacturer, please contact:

xxx@midea.com

Refrigeration Division
Overseas Sales Company

Address: No. 176, Jinxiu Avenue, Economic-Technological Development Area, Hefei, Anhui, China

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