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Service Manual_2020-V3.0
Service Manual
BMF No Frost Series
Applicable Models
Product Models
Applicable Models
HD-676REWN
UR-BCD520WE1-SQ
22031020006862
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 HD-676REWN
- Page 1 Service Manual BMF No Frost Series Applicable Models Product Models Applicable Models HD-676REWN UR-BCD520WE1-SQ 22031020006862 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...
- 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_2020-V3.0 Contents SIGNIFICANT UPDATE NOTES (NONE) ......................5 2. SAFETY WARNING ............................... 6 2.1 W ........................... 6 ARNING FOR OPERATION SAFETY 2.2 S ......................... 8 AFETY INSTRUCTION FOR REFRIGERANT 3. INSTALLATION AND COMMISSIONING ......................9 ................................... 9 3.1 H ANDLING ........................ - Page 4 Service Manual_2020-V3.0 8.1 P ............................38 OSITION OF SENSORS ........................... 38 8.2 R EPLACEMENT OF SENSORS ......................40 8.3 S ENSOR WITHOUT TERMINAL REPLACEMENT 8.4 S ..............................41 ENSOR TABLE 9. FUNCTION AND OPERATION ..........................42 9.1 D ............................. 42 ISPLAY OPERATION PANEL ..................................
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Page 5: Significant Update Notes (None)
Service Manual_2020-V3.0 1. Significant update notes (None) -
Page 6: Safety Warning
Service Manual_2020-V3.0 2. Safety Warning 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_2020-V3.0 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_2020-V3.0 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: Installation And Commissioning
Service Manual_2020-V3.0 3. Installation and commissioning 3.1 Handling Handling Protect the refrigerator in moving it,Same as shown as left photo, please move it by handcart with cushion Remove all packing materials and bottom cushion, the move into house for placement After moving it to appropriate location, wait for 2 hou rs before power on. -
Page 10: Leveling Of The Refrigerator
Service Manual_2020-V3.0 3.4 Leveling of the refrigerator Leveling of the refrigerator If the refrigerator cannot be placed steadily, adjust the footing to level it. Turn the feet clockwise to raise the refrigerator; turn the feet counterclockwise to lower the refrigerator. 3.5 Left or right open door reversal Door reversal Unplug your refrigerator and remove all food from the... -
Page 11: Installation Of Handle（None
Service Manual_2020-V3.0 Remove the center hinge, remove the center hinge shaft with a slotted screw driver, install hinge shaft on opposite side of the hinge and install the hinge to the left of the box. 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. -
Page 12: Main Parts And External Dimension
Service Manual_2020-V3.0 4. Main parts and external dimension 4.1 Main parts (The picture is only for reference, and specific appearance and configuration are subject to the real product) -
Page 13: External Dimension
Service Manual_2020-V3.0 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 of refrigerator room ❺Vegetable crisper ❿small tray in refrigerator room ⓫large tray in refrigerator room... -
Page 14: Midea Product Serial Number And Location
Service Manual_2020-V3.0 4.3 Midea product serial number and location 1） Product Serial Number — Including order number, production date and other information. When the product occur problem, it needs to be recorded or photographed and provided to us. 2）Paste location... -
Page 15: Electric Control System
Service Manual_2020-V3.0 5. Electric control system 5.1 Electrical parts parameters Applicable Model HD-676REWN Product Model UR-BCD520WE1-SQ 22031020006862 Product code Rated Voltage 115V 60Hz Item Specification Refrigerant R600a EZ75H1Y Compressor (Part : 11101010002225) Starting device type Fixed Speed The COP of compressor 1.80 (W/W) - Page 16 Service Manual_2020-V3.0 Others Lights None ■ Mechanical switch Switch of the light □ Magnetism control switch Defrosting parts Defrosting sensor NTC B3839 ( B5/25=3839K± 2% ) 115V、77(0 ～ -5) ℃ Fuse in freezing chamber Defrost heater in freezing chamber 115V、200W...
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Page 17: Circuit Diagram
Service Manual_2020-V3.0 5.2 Circuit diagram F: Freezer R: Refrigerator AMB: Ambient temperature... -
Page 18: Main Pcb Terminal Connection Diagram
Service Manual_2020-V3.0 5.3 Main PCB terminal connection diagram Connecting terminals Connecting terminals 1+2.Power supply 11. Ambient temperature sensor 3. Compressor 12. Freezing temperature sensor 4. Freezing defrost heater 13. Refrigeration temperature sensor 5. LED of freezing chamber 14. Freezing defrost sensor 6. -
Page 19: Refrigeration System
Service Manual_2020-V3.0 6. Refrigeration system 6.1 Refrigeration system working principle ❶Compressor→❷Right condenser→❸Anti-condensation tube→❹Left Condenser→❺Dry filter→❻Capillary tube→❼Evaporator→❽Suction tube→❶Compressor 6.2 Cooling pipeline and drain pipe inside the cabinet... -
Page 20: Circulating Route Of Cooling Air
Service Manual_2020-V3.0 6.3 Circulating route of cooling air 6.4 Welding points in chambers or foam layer 1) Welding points on freezer evaporator Welding point Pipe outer diameter (mm) 1-Freezer capillary and inlet of evaporator Aluminum pipe: Copper pipe: Φ6 Φ6.35 2-Heat transition tube and outlet of evaporator Aluminum pipe: Copper pipe: Φ6... -
Page 21: Welding Point In The Compressor Case
Service Manual_2020-V3.0 6.5 Welding point in the compressor case Welding point Pipe outer diameter (mm) 1-anti-condensation tube and outlet of venting connection Steel pipe: Φ4.0 Steel pipe: Φ4.0 tube 2-outlet of anti-condensation tube and outlet of right Steel pipe: Φ4.0 Steel pipe: Φ4.0 condenser tube Steel pipe: Φ4. -
Page 22: Dismantling Of Parts
Service Manual_2020-V3.0 7. Dismantling of parts 7.1 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; Door tray While squeezing it inward, lift up the door tray and take it out from door liner. -
Page 23: Light System
Service Manual_2020-V3.0 Lift up the division plate with a proper force and pull it out towards yourself; 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 24 Service Manual_2020-V3.0 Light of the freezing...
- Page 25 Service Manual_2020-V3.0 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.1）Loosen the hook with small normal screwdriver and pull out the switch until the wire connector reveals.
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Page 26: Air Duct Components Refrigerating Chamber And Fan Motor
Service Manual_2020-V3.0 7.4 Air duct components refrigerating chamber and fan motor Air duct components in freezing chamber 1） The refrigerator air duct components is located on the back of the refrigerating chamber. use slotted screwdriver to dismanlte the decorative cover, 2）then use cross screwdriver to remove the fittin screw of air duct cover 3）use fingers to hold the botton edge of air duct cover... -
Page 27: Air Duct Components In Freezing Chamber And Fan Motor
Service Manual_2020-V3.0 1） Remove the refrigerated air duct foam sponge, separate the duct foam, and take out the electric damper. 7.5 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 28 Service Manual_2020-V3.0 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; 2）Pry up the plastic hooks ,and separate the rear board of air duct assembly from front board of air duct assembly；...
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Page 29: Evaporator And Defrost System
Service Manual_2020-V3.0 4）pull the fan blades with big strength, until it is separated from the shaft of fan motor; if need to replace the fan motor, the reverse operation is for assembly 7.6 Evaporator and Defrost system Evaporator in freezing chamber Evaporator in freezing chamber 1）... -
Page 30: Compressor Case
Service Manual_2020-V3.0 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 heater The defrost heater is located at bottom of the evaporator. - Page 31 Service Manual_2020-V3.0 1-Power cord 5-Drain tray 2-Dry filter 6-Suction connection tube7-Drain tray 3-Capacitor 4-Compressor Disassembly and assembly of compressor 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 32 Service Manual_2020-V3.0 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 33 Service Manual_2020-V3.0 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 34 Service Manual_2020-V3.0 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 35: Display Control Board
Service Manual_2020-V3.0 1） Remove the two fixing screws on the drain tray and pull it out, replace a new one. 2） Disengage the drain tray buckle out of the compressor bottom plate installation hole and pull it out, replace a new one. 7.8 Display control board Display control board 1）Remove 2 fixing screws with a screwdriver. -
Page 36: Main Control Board
Service Manual_2020-V3.0 4）Loose a screw from the display control board. 5）Remove the light cover. 6）Pull out the LED light and display control board. 7）The reverse process can complete installation. 7.9 Main control board Main control board 1） remove the 2 fitting screws of main control PCB housing box... - Page 37 Service Manual_2020-V3.0 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; 3） Unplug all wiring connector, and take out the main...
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Page 38: Temperature Sensing System
Service Manual_2020-V3.0 8. Temperature sensing system 8.1 Position of sensors Position of sensors Have 4 sensors ①Ambient temperature sensor ②Sensor in refrigerating chamber ③Defrost sensor ④Sensor in freezing chamber 8.2 Replacement of sensors Sensor in refrigerating chamber 1) Before remove the sensor, the duct assembly should be removedRemove the air duct assembly. - Page 39 Service Manual_2020-V3.0 Sensor in freezer chamber The freezer air duct foam should be dismantled before removing this sensor. 1) Strip the tape that secures the wiring harness. 2) Then remove the sensor. Ambient temperature sensor The sensor is located in the main control board installation box and sends temperature signal to microprocessor.As the sensor connected to the main wire, if you need to replace, you must cut the wire...
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Page 40: Sensor Without Terminal Replacement
Take out a new sensor to cut the head of sensor. (Spare parts code：11201007000795) Its technical specifications apply to all MIDEA refrigerators. Strip off the head of the sensor and connect it. Wrap the two wires together with insulation tape. -
Page 41: Sensor R/Ttable
Service Manual_2020-V3.0 8.4 Sensor R/T table Tx(℃) Tx(℉) R（KΩ） Tx(℃) Tx(℉) R（KΩ） Tx(℃) Tx(℉) R（KΩ） -22.00 33.81 23.00 8.392 68.00 2.501 -20.20 31.85 24.80 7.968 69.80 2.391 -18.40 30.01 26.60 7.568 71.60 2.287 -16.60 28.29 28.40 7.190 73.40 2.188 -14.80 26.68 30.20 6.833... -
Page 42: Function And Operation
Service Manual_2020-V3.0 9. Function and operation 9.1 Display operation panel Button Icons A. Alarm or power off ①Freezer coldest setting B. Refrigerator Temperature setting ②Freezer colder setting C. Freezer Temperature setting ③Freezer cold setting ④Refrigerator coldest setting ⑤Refrigerator colder setting ⑥Refrigerator cold setting 9.2 Display At the first time of power-on, the display screen (including button light) will be bright for 3 seconds and... -
Page 43: Open Door Alarm
Service Manual_2020-V3.0 9.4 Open door alarm When door is open, light up, a notification tone will sound. If door is open last for 120s, there will be buzzer alarm, afterwards give alarm one time per second until the door is closed, press “ALRM OFF” button on control panel can cancel this alarm. -
Page 44: Defrosting Function Mode
Service Manual_2020-V3.0 Step 1: Check whether the connection terminals are plugged in place and whether there are foreign matters in them; after cleaning the terminals, plug them in again. LED①④ Ambient Step 2: If the fault still occurs, pull out the corresponding connection temperature flicke at the terminal on the main PCB, use a multimeter to check the resistance... -
Page 45: Demo Mode（None
Service Manual_2020-V3.0 LED ②④⑤ lit at the same time ,the press and the picture 3 state to enter the forced defrost mode. fans to stop working, and frost open heater, refrigerator into the frost 1. Under the mode of forced frost, frost sensor temperature 8 ℃, and then the refrigerator will exit the test mode and the frost heater open longer than 2... -
Page 46: Compressor
Service Manual_2020-V3.0 10. Compressor 10.1 Compressor on and off control specifications 1.1 When one of the following conditions is met, the compressor stops: 1) Measured temperature in all chambers ≤ Shutdown temperature of all chamber 2) Enter defrosting cycle 3) The compressor runs continuously for more than 3 hours, will stop at least 10 minutes 1.2 When compressor shutdown time has been more than 5 min, one of the following conditions is met, the compressor starts up: 1) Measured temperature in refrigerator chamber ≥... -
Page 47: Troubleshooting Method
Service Manual_2020-V3.0 11. Troubleshooting Method 11.1 No cooling (Air cooling-Electronic) - Page 48 Service Manual_2020-V3.0...
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Page 49: No Working Of Compressor
Service Manual_2020-V3.0 11.2 No working of compressor... -
Page 50: Inside Frosting, No Defrosting
Service Manual_2020-V3.0 11.3 Inside frosting, no defrosting... -
Page 51: Inside Frosting, No Defrosting-Maintenance Guidelines
Service Manual_2020-V3.0 11.4 Inside frosting, no defrosting-Maintenance guidelines... -
Page 52: Light Is Not On
Service Manual_2020-V3.0 11.5 Light is not on... -
Page 53: Fan Failure
Service Manual_2020-V3.0 11.6 Fan failure 11.7 Defective defrost circuit... -
Page 54: Noise
Service Manual_2020-V3.0 11.8 Noise 11.9 Air duct not operated... -
Page 55: Ice Makernot Make Ice（Option
Service Manual_2020-V3.0 11.10 Ice makernot make ice（Option）... -
Page 56: Product Exploded View And Spare Parts List
Service Manual_2020-V3.0 12. Product exploded view and spare parts list Please log in to TSP system to view and download these contents. - Page 57 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 Refrigerators If you need to get detailed technical information from the manufacturer, please contact: xxx@midea.com...
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