Service Manual

Important Safety Notices

⚠️ WARNING: There are special components used in this equipment which are important for safety. These parts are marked by [safety-critical-part symbol] 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: The Maintenance Manual is only for the use of maintenance personnel with certain experience and background in electrical, electronic, and mechanical fields. 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.

1. Significant Update Notes

(None)

2. Safety Warning Code

2.1 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 available AC power matches the voltage requirements of this appliance.

Connecting Electricity

⚠️ WARNING: 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. Keep ventilation openings, in both the freezer and the built-in structure, clear of obstruction.
2. Do not touch the interior of the freezer with wet hands. This could result in frost bite.
3. Do not use mechanical devices or other means to accelerate the defrosting process, other than those recommended by the manufacturer.
4. Do not damage the refrigerant circuit.
5. Do not damage the refrigerant tubing when handling, moving, or using the freezer.
6. Never allow children to play with, operate, or crawl inside the freezer. Risk of child entrapment. Before you throw away your old freezer: Take off the doors. 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 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.
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. It 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.

2.2 Safety Instruction for Refrigerant

⚠️ WARNING: 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.

3. Transport

3.1 Handling

Handling

1. Protect the refrigerator when moving it, as shown in the left photo. Please move it by handcart with a cushion.
2. Remove all packing materials and bottom cushion, then move the unit into the house for placement.
3. After moving it to the appropriate location, wait for 2 hours before powering it on.

Diagram showing a person tilting a refrigerator onto a handcart with a cushion for safe transport.

4. Installation and Commissioning

4.1 Door Disassembly and Assembly

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

4.2 Installation Location

Installation location

Choose a location that is easy for ventilation to facilitate heat dissipation, enhance performance, and reduce energy consumption.

Diagram illustrating recommended clearances around the refrigerator for proper ventilation: 100mm on the sides, 300mm at the back, and 100mm at the top.

4.3 Leveling of the Refrigerator

Leveling of the refrigerator

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

Diagram showing a refrigerator tilted, with an 'X' indicating an unstable position and a checkmark '✔' indicating a level position with adjusted footing.

4.4 Left or Right Open Door Reversal

Door reversal

Diagrams illustrating the process of dismantling and reassembling the refrigerator door hinges.

4.5 Installation of Handle

(None)

4.6 Installation of Door Lock

(None)

5. Product Configuration and Dimension

5.1 Main Parts and Their Names

Diagram labeling the main parts of the refrigerator: Temperature-control knob, Toolbar, Shelf, Zip-top can steel bar, and Levelling foot.

5.2 External Dimension

Diagrams illustrating the external dimensions of the refrigerator, labeled with codes A through H corresponding to height, width, and depth measurements.

5.3 Location of S/N

Diagram showing the location of the Serial Number (S/N) on the product carton and the product itself, with a note that some products also have the S/N on the lower right side of the cabinet.

6. Product Specification

6.1 Electrical Parameters

6.2 Cooling Temperature Setting Range

6.3 Circuit Diagram

Schematic diagram of the refrigerator's electrical circuit, showing connections for Power Plug (L, N, G), Thermostat (L, C, E), Light Switch, Lamp, Overload Protector, Compressor, PTC, and Capacitor.

7. Refrigerating Piping System and Circulating Route of Cooling Air

7.1 Refrigerating Piping System

Diagram of the refrigerating piping system, showing numbered components: 1 Compressor, 2 Condenser, 3 Dry filter, 4 Capillary tube, 5 Evaporator, 6 Suction tube.

8. Dismantling of Parts

8.1 Parts on the Door

Door Seal

It's more convenient to pull out from the corner. Take the door seal out of the door liner. When reloading, the door must be installed into the tank, carefully pressed flat, and check whether there is a gap between the door seal and the box body.

Image showing how to remove the door seal from the refrigerator liner.

Guardrail

Grab the Guardrail and squeeze it sideways. Pull out and remove from the refrigerator.

8.2 Parts Inside the Refrigerator

Shelf Assembly of Refrigerator

Used to place vegetables, fruits, and other items. Lift up the division plate with a proper force and pull it out towards yourself.

Diagram of the refrigerator's interior, showing shelves, toolbar, and zip-top can steel bar.

Freezer Drawer

None

8.3 Light System

Light

Light of the refrigerating

The light is at the right of the refrigerator chamber.

1. Remove the light cover.
2. Loosen the thermostat knob and fastening screw, and remove the thermostat box assembly.
3. Remove the connector.
4. Remove the light.

Images showing the location of the light bulb and thermostat box assembly in the refrigerator chamber.

Light of the freezing

None

Light Switch

There is a light switch on the side wall of the refrigerating chamber. Loosen the hook with a small normal screwdriver and pull out the switch until the wire connector reveals.

Image showing how to remove the light switch.

8.4 Evaporator and Defrost System

(None)

8.5 Compressor Case

Rear cover and compressor case: None

Compressor and the cooling system pipe: None

Diagrams illustrating steps for dismantling the refrigerator, including cutting power, tilting the unit, cutting compressor pipelines, removing screws, and removing metal clamps.

Diagrams illustrating steps for dismantling the refrigerator, including removing clipping strips, protective covers, starters, protectors, and the compressor.

Diagrams illustrating steps for servicing the refrigerant system, including cutting tubes, welding, vacuum system setup, and refrigerant perfusion.

Image showing the piping system in the compressor case, with numbered components: 1 Dry filter, 2 Suction transition tube, 3 Compressor, 4 Right condenser. Also shows a drain tray.

8.6 Display Control Board

(None)

9. Temperature Sensing System

9.1 Thermostat

Thermostat

1. Remove the nail on the thermostat box assembly. Remove the screws of the fixed temperature control box with a screwdriver.
2. Pull out the knob, remove the socket and terminal, and replace the thermostat.

Images showing the thermostat box assembly, the thermostat knob, and the connection terminals for replacing the thermostat.

10. Function and Operation

10.1 Operation Panel

Image of the refrigerator's operation panel, showing the temperature control knob with settings like 'COOLER' and 'NORMAL'.

10.2 Temperature Setting

• Turn the knob counterclockwise, the temperature inside the box becomes higher.
• Turn the knob clockwise, the temperature inside the box becomes lower.
• Please adjust between "COOL" and "COOLER" gear.
• Recommended gear: "NORMAL".
• When the knob is turned to "OFF", it means that the compressor stops running.

10.3 Open Door Alarm

(None)

11. Compressor

11.1 Compressor On and Off Control Specifications

1.1 When one of the following conditions is met, the compressor stops:

• Tr ≤ Trt;

1.2 When all the following conditions are met, the compressor starts up:

• Tr ≥ Trk;

When 1.1 and 1.2 are not satisfied, the compressor maintains the original state.

12. Troubleshooting Method

12.1 Not Cooling

Flowchart for troubleshooting 'No cooling' issues, guiding through checks for power supply, thermostat, compressor operation, condenser heat, and piping blockages. Includes a diagram for winding resistance.

12.2 No Working of Compressor

Flowchart for troubleshooting 'No working of compressor' issues, guiding through checks for power, compressor operation, PCB voltage, thermostat, and compressor winding.

12.3 Thermostat Malfunction-Undercooling

Thermostat malfunction-Undercooling

Flowchart guiding through checks for thermostat knob position, throttle opening, thermostat function, and adjustment screw. Includes an image showing a thermostat adjustment screw, with an arrow indicating a clockwise turn increases temperature by 3°C.

12.4 Inside Frosting, No Defrosting

Flowchart for troubleshooting 'Inside frosting, no defrosting' issues, guiding through checks for door seal gaps, humidity, moisture, air duct blockages, and defrosting system failure.

12.5 Inside Frosting, No Defrosting - Maintenance Guidelines

Door Seal

1. Door seal OK? (both sides of door seal) A crack will cause freeze in wind tunnel.

Flash seam between box body and buccal frame

Throttle

Installation of air duct and foam

Freezing sensor

1. Poor seal: If there are gaps or edge warping, replace the door seal (the installation of the door seal should pay attention to using the thin-oriented and press to ensure that the door closure is correct). 2. To confirm the landing edge between the bottom door sealed magnetic stripe and the edge of each sheet metal side, generally is 6-10mm; if there are obvious errors such as 2mm or 20mm, it is usually because of the deformation of the door or the box, and you need to replace the door seal or the door. 3. If the door in the side of the beam itself cannot be closed well, confirm the side between the bottom door body and the cabinet. If the gap is <12mm, it must be because of the hinge; at this time, hinge positioning holes expanding and re-installation are the correct maintenance methods.

1. If the inner box exists a crack with mouth frame, it will lead to leakage of cold; at this time, white putty paste can be used for maintenance fix it. 2. If the sheet metal has a significantly step at a 45° angle, resulting in the door seal can not be fully fit in the sheet metal, can also lead to leakage of cold. At this time, with flat PVC board to do the mat, maintenance personnel can use a plastic mallet to knock it.

1. Confirm whether the throttle switch operates normally; if not, the air door or line communication may be failures, replace air door or repair line at this time. 2. If the throttle can normally switch, confirm air leakage after the throttle closed. If the air leaks, the throttle is bad or blocked, to identify the reasons for the corresponding method of maintenance.

1. If the air duct cover (plastic material) and the duct foam (EPS) is not installed tightly, it will cause the cold air directly blow on the plastic, which will lead to the icing of the plastic. 2. The air duct needs to be re-installed to make it compact. (536 series duct seal structure is better, the probability of occurrence of it is low)

If the refrigerator continues work even makes ice after reaching the set temperature, then test the resistance of the sensor from one side of the motherboard under. According to the corresponding resistance table, if the resistance is clearly inconsistent with the actual temperature, the sensor may be bad, then replace the temperature sensor (resistance value see annex).

OK

OK

OK

OK

12.6 Light is Not On

Flowchart for troubleshooting 'Light is not on' issues, guiding through checks for display/cooling, filament disconnection, wiring harness, mainboard voltage, and door switch contact.

12.7 Noise

Flowchart for diagnosing and troubleshooting noise issues in the refrigerator, identifying potential sources like product placement, fan, air duct, evaporator, compressor, or timer.

13. Figures and Details of Repair Parts

See this section in the TSP.

Entry Guidelines (TSP System)

Where

Chrome Google: https://tsp.midea.com/

How

Midea user: Same as your MIP account & password.

Overseas customer:

Account: Generated by TSP (provided by administrator). Each customer has a code in Midea Group, G/E + seven numbers.

Password: abcd1234 (please revise after login in).

If the input error more than 5 times, account will be locked, need the administrator to unlock.

Admin team:

REF: Jamie Liu (liujc5@midea.com)

IT: Martin He (dingding.he@midea.com)

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 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