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Service Manual_2018-V2.0
Service Manual
COMBI SERIES
Applicable Models
Model Code
Applicable Models
HD-676REWN
UR-BCD520WE1-SQ
22031020005621
The picture in this service manual is only for reference, and specific appearance
and configuration are subject to the real product.
This manual mainly teaches the method, the specific work skill needs engineer to
accumulate through the daily work.
1
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Summary of Contents for Midea Combi Series
- Page 1 Service Manual_2018-V2.0 Service Manual COMBI SERIES Applicable Models Model Code Applicable Models HD-676REWN UR-BCD520WE1-SQ 22031020005621 The picture in this service manual is only for reference, and specific appearance and configuration are subject to the real product. This manual mainly teaches the method, the specific work skill needs engineer to...
- Page 2 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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Page 3: Table Of Contents
Service Manual_2018-V2.0 Contents SIGNIFICANT UPDATE NOTES (NONE) ......................5 2. SAFETY WARNING CODE ............................6 2.1 W ........................... 6 ARNING FOR OPERATION SAFETY ......................... 8 2.2 S AFETY INSTRUCTION FOR REFRIGERANT 3. TRANSPORT ................................9 3.1 H ................................... 9 ANDLING 4. INSTALLATION AND COMMISSIONING ......................10 4.1 D ........................ - Page 4 Service Manual_2018-V2.0 ............................35 8.9 M AIN CONTROL BOARD 9. TEMPERATURE SENSING SYSTEM ......................... 36 ............................36 9.1 P OSITION OF SENSORS 9.2 R ........................... 36 EPLACEMENT OF SENSORS ............................37 9.3 S ENSOR REPLACEMENT (R/T) ............................. 38 9.4 S ENSOR RESISTANCE 10.
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Page 5: Significant Update Notes (None)
Service Manual_2018-V2.0 1. Significant update notes (None) -
Page 6: Safety Warning Code
Service Manual_2018-V2.0 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. - Page 7 Service Manual_2018-V2.0 CONNECTING ELECTRICITY Electrical Shock Hazard. Failure to follow these instructions can Plug into a grounded 3-prong outlet. result in death, fire, or electrical shock. Do not remove the ground prong. Do not use an adapter. WARNING Electric Shock Hazard Failure to follow these instructions can result in electric shock, fire, or death.
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Page 8: Safety Instruction For Refrigerant
Service Manual_2018-V2.0 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. -
Page 9: Transport
Service Manual_2018-V2.0 3. Transport 3.1 Handling Handling 1)Protect the refrigerator in moving it,Same as shown as lef t photo, please move it by handcart with cushion 2)Remove all packing materials and bottom cushion, the m ove into house for placement 3)After moving it to appropriate location, wait for 2 hours bef ore power on. -
Page 10: Installation And Commissioning
Service Manual_2018-V2.0 4. Installation and commissioning 4.1 Door Disassembly and Assembly The refrigerator door needs to be dismantled if it cannot enter the room in the whole. 4.2 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. -
Page 11: Left Or Right Open Door Reversal
Service Manual_2018-V2.0 4.4 Left or right open door reversal Door reversal 1) Unplug your refrigerator and remove all food from the door shelves. Remove all food from the inner door liner. Fix the door by tape. 2) Remove the left cover plate and the right top hinge cover, then unscrew screws and remove the right top hinge. -
Page 12: Installation Of Handle（None
Service Manual_2018-V2.0 Put down the refrigerate door on the middle hinge vertically, then take out the top hinge and cover of other side from accessory bag, assemble top hinge , hinge cover and hole cover. 4.5 Installation of handle（None） 4.6 Installation of door lock（None）... -
Page 13: Product Configuration And Dimension
Service Manual_2018-V2.0 5. Product configuration and dimension 5.1 Main parts and their names... -
Page 14: External Dimension
Service Manual_2018-V2.0 Freezer chamber Refrigerator chamber ❻Air duct assembly of freezer room ❶Lamp box component ❼Top drawer of freezer ❷Air duct assembly of refrigerator room ❽Drawer under freezer ❸Glass shelf of refrigerator room ❾ Adjustable foot ❹Glass shelf ❺Vegetable crisper ❿small tray in refrigerator room ⓫large tray in refrigerator room 5.2 External dimension... -
Page 15: Location Of S/N
Service Manual_2018-V2.0 5.3 Location of S/N Some products also have S/N on the lower part of the right side of the Cabinet. -
Page 16: Product Specification
Service Manual_2018-V2.0 6. Product specification 6.1 Electrical parameters Applicable Models HD-676REWN Product Name UR-BCD520WE1-SQ Product Code 22031020005621 Item Specification Specification R600a Refrigerant Compressor EZ75H1Y-U Starter(PTC) QPE2-A4R7MD3 DRB31T61A1 Overload protector(OLP) Integrate PTC+OLP None None Variable frequency driver board 10μF Capacitor Power filter None Rmc：5.05±7%Ω... -
Page 17: Cooling Temperature Setting Range
Service Manual_2018-V2.0 6.2 Cooling temperature setting range Compartment The highest ( Lowest ( Freezing Refrigerating Variable temperature 6.3 Defrosting parts Electronic type Item Specification Defrosting sensor 5V 3839 77(0,-4) ℃ Fuse Defrost heater in freezing chamber 115V 200W 6.4 Circuit diagram F: Freezer R: Refrigerator FD: Freezer Defrost C: Condensation... -
Page 18: Main Control Board Structure Diagram
Service Manual_2018-V2.0 6.5 Main control board structure diagram... -
Page 19: Refrigerating Piping System And Circulating Route Of Cooling Air
Service Manual_2018-V2.0 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 Special soldering position... -
Page 20: Circulating Route Of Cooling Air
Service Manual_2018-V2.0 7.3 Circulating route of cooling air... -
Page 21: Dismantling Of Parts
Service Manual_2018-V2.0 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 ① out of door liner. ① Door tray While squeezing it inward, lift up the baffle and take it out from refrigerator liner. -
Page 22: Light System
Service Manual_2018-V2.0 1）Pull out the crisper. 2）Lift the crisper up and take the crisper out from the refrigerator. Freezer Drawer Remove the freezer drawer according to below steps: Top drawer of freezer: Lift front of the drawer, tilt the drawer upward. Drawer under freezer: Lift front of the drawer, tilt the drawer upward. - Page 23 Service Manual_2018-V2.0...
- Page 24 Service Manual_2018-V2.0 Light of the freezing Light of the freezer room is located upper freezer room (inner display) 1）Remove the lamp cover 2）Remove the LED 3) The reverse process can complete installation. Light switch There is a light switch on the side wall of the refrigerating chamber.
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Page 25: Air Duct Components Refrigerating Chamber And Fan Motor
Service Manual_2018-V2.0 the door switch of freezer room is placed in the mounting box on the bottom of refrigerator room door 1）Use slotted screwdriver to dismantle the cover of door switch; 2） Disconnect the wiring connector, and dismantle the door switch 3）... -
Page 26: Air Duct Components In Freezing Chamber And Fan Motor
Service Manual_2018-V2.0 3）use fingers to hold the botton edge of air duct cover and pull it outwards with big strength Fan motor of air duct None Electric damper 8.5 Air duct components in freezing chamber and fan motor Air duct components in freezing chamber All accessories in the freezing chamber should be dismantled before removing the air duct components. - Page 27 Service Manual_2018-V2.0 Fan motor of air duct 1）use screwdriver to remove the 1 pc screw on the rear side of freezer room air duct assembly, then remove the black sponge at the air duct;...
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Page 28: Evaporator And Defrost System
Service Manual_2018-V2.0 2）Pry up the plastic hooks ,and separate the rear board of air duct assembly from front board of air duct assembly； 3）use cross screwdriver to remove the 3 pcs screws, separate the bracket from the fan motor; 4）pull the fan blades with big strength, until it is separated from the shaft of fan motor;... - Page 29 Service Manual_2018-V2.0 Fuse 1）Disconnect the fuse connector. 2）Cut off the band which fixes the fuse. 3）Separate the fuse and the evaporator. *Don’t break the welding of the evaporator in case that only the fuse needs to be replaced. Defrost sensor The defrost sensor is located on top of the evaporator.
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Page 30: Compressor Case
Service Manual_2018-V2.0 8.7 Compressor case Rear cover 1）Remove by cross screwdriver the screws fixing back cover plate of compressor chamber anticlockwise 2）Take the back cover plate of compressor chamber upward. Compressor and the cooling system pipe 1） Cut off the power, remove the goods in the refrigerator, with the tape to make the door fixed firmly and prevent the door dropping when the refrigerator dumping. - Page 31 Service Manual_2018-V2.0 4-1）Remove the screws(for some models) -Two screws outside -One screw inside 4-2）Remove the metal clamp(for some models) -Disassembly the metal clamp that is fix the electric appliance shield 5）Remove the clipping strip Slowly pull it out 6）Remove the protective cover -Pry the protective cover slowly from the upper part, -Pull it out and remove it.
- Page 32 Service Manual_2018-V2.0 8）Loosen the screw of the compressor bottom plate, remove the floor together with the compressor from the box. 9）Use the wrench to remove the bolts by steps❹❺❻❼, replace the compressor and reverse process can complete installation. 10）Use Pipe cutter cut off the condenser tube❽, then Shear off capillary ❾...
- Page 33 Service Manual_2018-V2.0 12）Replace the filter, Cu-Fe tubes welding ⓭ used Ag welding rod, Cu-Cu tubes welding ⓮ used Cu welding rod. 13）Vacuum system,The degree of vacuum below 6Pa. 14）Perfusion refrigerant. 15）Use the vise grip pliers clamp the middle of the process pipe, then seal welding process tube⓯⓰.
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Page 34: Display Control Board (None)
Service Manual_2018-V2.0 Piping system in the compressor case ❶ Compressor ❷ Suction connection Pipe ❸ Drier ❹ Capillary Tube ❺ Anti-condensation pipe ❻ Right condenser ❼ Left condenser ❽ Anti-condensation pipe ❾ Exhaust evaporation pipe Drain tray 1）Disengage the drain tray buckle out of the compressor bottom plate installation hole. -
Page 35: Main Control Board
Service Manual_2018-V2.0 8.9 Main control board Main control board 1） remove the 2 fitting screws of main control PCB housing box 2） take out the main control PCB housing box, use slotted screwdriver to pry up the cover until it is separated from the housing box;... -
Page 36: Temperature Sensing System
Service Manual_2018-V2.0 9. Temperature sensing system 9.1 Position of sensors Position of sensors Have 4 sensors ① Sensor in freezing chamber ② Sensor in refrigerating chamber ③ Ambient temperature or humidity sensor ④ Defrost sensor freezing chamber 9.2 Replacement of sensors Sensor in refrigerating chamber 1) Before remove the sensor, the duct assembly should be removed Remove the air duct assembly. -
Page 37: Sensor Replacement
9.3 Sensor replacement Sensor replacement guidelines Cut off the damaged head of sensor. Strip off the sensor wiring. Take out a new sensor to cut the head of sensor. (Spare parts code：11201007000795) Its technical specifications apply to all MIDEA refrigerators. -
Page 38: Sensor Resistance (R/T)
Service Manual_2018-V2.0 Strip off the head of the sensor and connect it. Wrap the two wires together with insulation tape. Wrap the two wires together. 9.4 Sensor resistance (R/T) Tx(℃) R（KΩ） Tx(℃) R（KΩ） Tx(℃) R（KΩ） Tx(℃) R（KΩ） Tx(℃) R（KΩ） 33.81 14.31 6.495 3.141... -
Page 39: Function And Operation
Service Manual_2018-V2.0 10. Function and operation 10.1 Operation panel 10.2 Display At the first time of power-on, the display screen (including button light) will be bright for 3 seconds and then press the middle gear to show operation Normal operation display When failure occurs, the corresponding LED light group will display fault code (circular display);... -
Page 40: Function Selection
Service Manual_2018-V2.0 afterwards give alarm one time per second, press any buttons on control panel can cancel this buzzer alarm. Note: under the situation of the refrigerator compartment turn off, the door switch and internal lamp works properly. Note: When open the door, the display panel is light on; when the door is closed, the display panel will be light off after 30s if there is no any operation on display panel 10.5 Function Selection Enter: Cyclic Modulation Quick cool mode... -
Page 41: Defrosting Function
Service Manual_2018-V2.0 10.7 Defrosting function Defrost in the freezing chamber 1）Defrost the freezing chamber as per the accumulative operation time of the compressor. 2）If power failure occurs abruptly to the compressor and the sensor in freezing chamber is less than 0 ℃ after powering on, then first conduct defrosting once. -
Page 42: Backup Data For Power Fail
Service Manual_2018-V2.0 10.9 Backup data for power fail The running state of the refrigerator is remembered after compressor running for 1 hour continuously. The running state of the refrigerator is remembered after change function settings and lock. When the refrigerator is out of power and recharged, the running state of the refrigerator is same as before . -
Page 43: Compressor
Service Manual_2018-V2.0 11. Compressor 11.1 Compressor on and off Control specifications 1.1 When one of the following conditions is met, the compressor stops: 1) Tr ≤ Trt； 2) The compressor runs continuously for more than 3 hours (Stop 5 minutes); 1.2 When all the following conditions are met, the compressor starts up: 1) Tr ≥Trk;... -
Page 44: Troubleshooting Method
Service Manual_2018-V2.0 12. Troubleshooting Method 12.1 No cooling (Air cooling-Electronic) -
Page 45: No Working Of Compressor
Service Manual_2018-V2.0 12.2 No working of compressor 12.3 Inside frosting, no defrosting... -
Page 46: Inside Frosting, No Defrosting-Maintenance Guidelines
Service Manual_2018-V2.0 12.4 Inside frosting, no defrosting-Maintenance guidelines... -
Page 47: Light Is Not On
Service Manual_2018-V2.0 12.5 Light is not on 12.6 Fan failure... -
Page 48: Defective Defrost Circuit
Service Manual_2018-V2.0 12.7 Defective defrost circuit 12.8 Noise... -
Page 49: Air Duct Not Operated(Electronically) (None)
Service Manual_2018-V2.0 12.9 Air duct not operated(electronically) (None) -
Page 50: Figures And Details Of Repair Parts
Service Manual_2018-V2.0 13. Figures and details of repair parts See this section in the TSP. - Page 51 MIDEA appliances after sales website tsp.midea.com 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...
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