Midea SBS Series Service Manual
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Midea SBS Series Service Manual

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Service Manual_2023-V2.0
Service Manual
SBS Series
Applicable Models
Model Code
Applicable Models
HC-957WEN
UR-BCD746WE-DT
22031050000741
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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  • Page 1 Service Manual_2023-V2.0 Service Manual SBS Series Applicable Models Model Code Applicable Models HC-957WEN UR-BCD746WE-DT 22031050000741 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...
  • 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.

  • Page 3: Table Of Contents

    Service Manual_2023-V2.0 Contents SIGNIFICANT UPDATE NOTES (NONE) ......................5 2. SAFETY WARNING ............................... 6 2.1 W ........................... 6 ARNING FOR OPERATION SAFETY 2.2 S AFETY INSTRUCTION FOR REFRIGERANT ......................... 8 3. INSTALLATION AND COMMISSIONING ......................9 3.1 H ANDLING ................................... 9 3.2 D ........................
  • Page 4 Service Manual_2023-V2.0 7.11 M AIN CONTROL BOARD OWER BOARD AND NVERTER DRIVER BOARD .............. 42 7.12 D ISTRIBUTOR ................................. 43 7.13 O ..................... 43 PEN DOOR MOTOR AND ICE BLOCKING PLATE 7.14 W ATERWAY SYSTEM ............................... 45 8. TEMPERATURE SENSING SYSTEM ......................... 47 8.1 P ............................

  • Page 5: Significant Update Notes (None)

    Service Manual_2023-V2.0 1. Significant update notes (None)

  • Page 6: Safety Warning

    Service Manual_2023-V2.0 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_2023-V2.0 CONNECTING ELECTRICITY Electrical Shock Failure to follow these instructions Hazard. can result in death, fire, or electrical Plug into a grounded 3-prong outlet. 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.

  • Page 8: Safety Instruction For Refrigerant

    Service Manual_2023-V2.0 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.

  • Page 9: Installation And Commissioning

    Service Manual_2023-V2.0 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 Service Manual_2023-V2.0 3) As shown as right photos, use screwdriver to remove the 5 pcs screws, and then remove the upper hinge cover. Disconnect the 5pcs fast connectors, then use cross screwdriver or socket spanner to remove the 2pcs M5 screws and 1 pc grounding screw by anticlockwise.
  • Page 11 Service Manual_2023-V2.0 Assembly of freezer door 1) Put the freezer door down gently until the axis of hinge inserted into the axis hole of door completely. 2) Put the upper hinge on suitable position, then use cross screwdriver or socket spanner to fix the 2 pcs M5 screws and 1 pc grounding screw by clockwise, and connect the 6 pcs fast connectors.

  • Page 12: Installation Location

    Service Manual_2023-V2.0 assembly of refrigerator door 1) Put the refrigerator door down gently until the axis of hinge inserted into the axis hole of door completely, and then closes the door, to make sure the refrigerator door fit the cabinet closely. 2) Put the upper hinge on suitable position, then use cross screwdriver or socket spanner to fix the 2 pcs M5 screws.

  • Page 13: Leveling Of The Refrigerator

    Service Manual_2023-V2.0 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 Adjustment to level the door Adjustment to level the door（Up and down ）...
  • Page 14 Service Manual_2023-V2.0 Use screwdriver to loosen the 2 pcs screws, right and left adjust the upper hinge to make door aperture be homogeneity. Put the hinge cover on suitable position, and then use the screwdriver to fix the 5 pcs screws. Adjustment to plane the door (left and right) Use screwdriver to remove the 5 pcs screws, and then remove the upper hinge cover.

  • Page 15: Main Parts And External Dimension

    Service Manual_2023-V2.0 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 16: External Dimension

    1560 (The picture is only for reference) 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.
  • Page 17 Service Manual_2023-V2.0 2）Paste location Some products also have S/N on the lower part of the right side of the Cabinet.

  • Page 18: Electric Control System

    Service Manual_2023-V2.0 5. Electric control system 5.1 Electrical parts parameters Applicable Model HC-957WEN Product Model UR-BCD746WE-DT Rated Voltage 115V 、60Hz Item Specification Refrigerant R600a DZ120V1U Compressor (Part code : 11101020001785) Starting device type DC Inverter The COP of compressor 1.97 (W/W) The max cooling capacity of 265 W compressor...
  • Page 19 Service Manual_2023-V2.0 Lights inside the refrigerating DC12V、≤2.5W chamber Others Lights DC5V、≤1W □ Mechanical switch Switch of the lights ■ Magnetism control switch Other electrical parts Water valve 110～127V、20W Water pump DC12V、6W Electric exchange valve None Defrosting parts Defrosting sensor NTC B3839 ( B5/25=3839K±2% ) Fuse in freezing chamber 77℃...

  • Page 20: Circuit Diagram

    Service Manual_2023-V2.0 5.2 Circuit diagram F: Freezer R: Refrigerator FD: Freezer Defrost C: Condensation...

  • Page 21: Main Control Pcb Terminal Connection Diagram

    Service Manual_2023-V2.0 5.3 Main control PCB terminal connection diagram...

  • Page 22: Power And Ice-Making Control Board Wiring Schematic

    Service Manual_2023-V2.0 5.4 Power and ice-making control board wiring schematic...

  • Page 23: Inverter Board Terminal Connection Diagram

    Service Manual_2023-V2.0 5.5 Inverter board terminal connection diagram 1. Filter 2. Main PCB 3. Inverter Board 4. Compressor...

  • Page 24: Refrigeration System

    Service Manual_2023-V2.0 6. Refrigeration system 6.1 Refrigeration system working principle ❶Compressor→❷Condenser→❸Anti-water condensed pipe→❹Drier→❺Capillary Tube→❻Evaporator→❼Suction Pipe→❽Suction connection Pipe→❶Compressor 6.2 Cooling pipeline and drain pipe inside the cabinet...

  • Page 25: Circulating Route Of Cooling Air

    Service Manual_2023-V2.0 6.3 Circulating route of cooling air 6.4 Welding points in chambers or foam layer Welding points on freezer evaporator Welding point Pipe outer diameter (mm) 1-Freezing capillary and inlet of evaporator Aluminum pipe: Copper pipe: Φ3.0 Φ5.1 Copper pipe: Φ6.35 Aluminum pipe: Φ8 2-Heat transition tube and outlet of evaporator...

  • Page 26: Welding Point In The Compressor Case

    Service Manual_2023-V2.0 6.5 Welding point in the compressor case Welding point Pipe outer diameter (mm) Steel pipe: Φ4.76 Steel pipe: Φ4.76 1-Inlet of anti-condensation tube and outlet of condenser Steel pipe: Φ4.76 Copper pipe: Φ6.33 2-Outlet of anti-condensation tube and inlet of dry filter 3-Outlet of dry filter and inlet of freezing capillary Copper pipe: Φ4.0 Copper pipe: Φ1.8...

  • Page 27: Dismantling Of Parts

    Service Manual_2023-V2.0 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 ① out of door liner; Door tray While squeezing it inward, lift up the door tray and take it out from door liner.

  • Page 28: Light System

    Service Manual_2023-V2.0 Freezer Drawer 1)Pull the drawer out completely; 2)Lift it up slightly and take it out from the refrigerator. 7.3 Light system Light Light of the refrigerating 1）Use vacuum cap to pull the lampshade outwards 2）Push away LED light panel with your hand along the arrow direction shown in the picture and separate LED light panel from the hook;...

  • Page 29: Air Duct Components Refrigerating Chamber And Fan Motor

    Service Manual_2023-V2.0 2）Pull the terminal, remove the light switch. 7.4 Air duct components refrigerating chamber and fan motor Air duct components refrigeratingchamber 1） Remove by cross screwdriver 3 screws on the positions shown in the picture anticlockwise. 2）Remove the filter along the arrow direction, then remove the decoration cover of refrigerator air duct until air duct decoration cover completely falls off from refrigerator body and air duct foam，remove...

  • Page 30: Ice Maker

    Service Manual_2023-V2.0 3）Remove connecting terminals of ventilation door by hands, catch hold of air duct foam in refrigerating chamber and pull it towards the arrow direction shown in the picture until air duct foam is separated from refrigerator body, and take out refrigerating air duct foam.

  • Page 31: Crashing Ice Motor

    Service Manual_2023-V2.0 2) First use a screwdriver to remove a screw as shown in the picture. Pull the ice maker assembly outwards forcefully, and disconnect the wiring connector, then taken out the ice maker. 7.6 Crashing ice motor disassembly of crashing ice motor 1）Use cross screwdriver to remove 4 screws of crashing ice motor, and disconnect the wiring connector.

  • Page 32: Air Duct Components In Freezing Chamber And Fan Motor

    Service Manual_2023-V2.0 7.7 Air duct components in freezing chamber and fan motor Air duct components in freezing chamber 1）First, take out 2 screw caps of air duct cover with flat-blade screwdriver or blade, then remove 2 screws fixing air duct cover. 2）As shown in the right picture, catch hold of upper part of freezing air duct as shown in the picture, pull it outward along the arrow direction with strength until air...

  • Page 33: Evaporator And Defrost System

    Service Manual_2023-V2.0 2） After the removal of cover plate of upper air duct in freezing chamber. Remove the three fixing screws anticlockwise by cross screwdriver. Complete disassembly of the motor 7.8 Evaporator and Defrost system Evaporator in freezing chamber Evaporator in freezing chamber 1）Remove the air duct components in freezing chamber.

  • Page 34: Compressor Case

    Service Manual_2023-V2.0 This defrost heater with defrost sensor and fuse can be dismantled separately, it DOES NOT need to replace the evaporator assembly if only heater fail to work. Defrosting fuse ① Defrost sensor ② Defrost heater ③ 1）Disconnect the connecting terminals. 2）Cut off the band.
  • Page 35 Service Manual_2023-V2.0 ❶Drier ❺Compressor ❷Suction Pipe ❻Condenser fan ❸Capillary Tube ❼Condenser ❹Anti-water condensed pipe ❽Water valve 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 36 Service Manual_2023-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 37 Service Manual_2023-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 38 Service Manual_2023-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.
  • Page 39 Service Manual_2023-V2.0 2) Pull the fan blade pointed by the arrow to the left and remove it 3）Remove the screws fixing the motor. 4）Push the fan bracket to the left in the direction of the arrow until the motor can be taken out. Water valve 1）Remove the fixing screw as shown in the figure...
  • Page 40 Service Manual_2023-V2.0 2）Take out the water valve and pull off the connecting terminal 3）Press the position shown in the figure, take out the water pipe and complete the replacement of water valve. Drain tray 1）Remove the bottom screws of the compressor bottom plate 2）Replace the drain tray, the reverse process can complete installation.

  • Page 41: Display Control Board

    Service Manual_2023-V2.0 7.10 Display control board Display control board 1）Use vacuum cap to pull the control panel outwards 2）Disconnect the fast connector, then remove the control PCB Distributor display control panel Use vacuum cap to pull the distributor display control panel outwards 2）Disconnect the fast connector, then remove the control PCB...

  • Page 42: Main Control Board, Power Board And Inverter Driver Board

    Service Manual_2023-V2.0 7.11 Main control board, Power board and Inverter driver board Main control board, Power board and Inverter driver board 1) Dismantle the screw, then remove the PCB mounting box cover. 2) Disconnect all the wiring connectors. Method of disconnecting the connection terminals： a.

  • Page 43: Distributor

    Service Manual_2023-V2.0 7.12 Distributor Distributor on the door 1) Use a suction cup to remove the display control panel on the dispenser. 2) After removing the display control panel, use a screwdriver to remove the two screws as shown in the figure.
  • Page 44 Service Manual_2023-V2.0 1) After removing the distributor, use a screwdriver to remove the screw as shown in the figure. 2) Take out the open door motor. Take out the connecting terminal, complete motor replacement. 3) Remove the ice blocking plate. 5) Take out the connecting terminal, complete the ice blocking plate and the assistive heater replacement.

  • Page 45: Waterway System

    Service Manual_2023-V2.0 7.14 Waterway system Disassembly of internal water filter Installation of external waterway You need a suitable pipe connector for connecting the water pipe with the water tap. 1) Please insert the water pipe(14) into one end of pipe connector (13);...
  • Page 46 Service Manual_2023-V2.0 3) Insert the end of white water pipe into one end of pipe adapter ; Disassembly and installation of water filter After 6 months of continuous use, the light of WATER FILTER on display panel will blink. If that happens, please replace the water filter.

  • Page 47: Temperature Sensing System

    Service Manual_2023-V2.0 8. Temperature sensing system 8.1 Position of sensors Position of sensors Have 5 sensors ① Ice maker temperature sensor ② Freezer temperature sensor ③ Freezer defrosting temperature sensor ④ Ambient temperature and humidity sensor ⑤ Refrigerator temperature sensor 8.2 Replacement of sensors Sensor in freezing chamber 1）To remove the sensor cover, you may squeeze it up...
  • Page 48 Service Manual_2023-V2.0 Ambient temperature and humidity sensor The sensor used for measurement of ambient temperature is located within upper hinge cover of refrigerating chamber door; Defrost sensor in freezing chamber The defrost sensor is located on top of the evaporator. 1）Disconnect the connector of defrost sensor 2）Cut off the band which fixes the sensor.

  • Page 49: 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 50: Sensor R/Ttable

    Service Manual_2023-V2.0 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 51: Function And Operation

    Service Manual_2023-V2.0 9. Function and operation 9.1 Display operation panel Icons Button ❶R/F temperature display area A. Ref. temperature adjustment ❷Super freezing B. Frz. temperature adjustment ❸Super cooling C. Water Filter time resetIce maker on/off ❹ Water filter over-use warning light D.

  • Page 52: Temperature Control

    Service Manual_2023-V2.0 9.2 Temperature control 9.2.1 Temperature setting of refrigerating chamber Unlock the display control panel first. Press “REF. TEMP” button, then press “REF.TEMP” to adjust temperature, the setting temperature is changed circularly as below. Click the LOCK button to take effect. 7℃→6℃...

  • Page 53: Defrosting Function

    Service Manual_2023-V2.0 9.3.5 Dispenser heater shutdown Unlock the display control panel first. Then press the LOCK button and the ICE ON button at the same time for 3 seconds to enter the mode. Click the LOCK button to take effect.Under this mode, turn off the heater for the distributor, thermal insulating door and mouth frame.

  • Page 54: Open Door Alarm

    Note: When open the door, the display panel will 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. 9.6 Error code and solutions Note: Midea full common fault code, combined with the actual product display reference. Fault Type Troubleshooting and Solutions...
  • Page 55 Service Manual_2023-V2.0 see if it is broken. If test value is ∞Ω, the wire is broken.(If the wire in the door is broken, replace the door. Other conditions cannot be repaired.) Step 3: If the wire is OK, replace the display control board. Step 4: If the fault still occurs, replace the main control PCB.
  • Page 56 Service Manual_2023-V2.0 Step 2: Enter the forced ice making mode and check whether the ice maker works normally. Step 3: If the ice maker does not work, replace the ice motor. Step 4: If the fault still occurs, replace the main control PCB. Step 1: Check whether the connection terminal s in the hinge cover and the main control PCB are plugged in place and whether there are foreign matters in them;...

  • Page 57: Eye Test Mode Of Ice Maker

    Service Manual_2023-V2.0 Step 1: Check whether the connection terminal on the dispenser display PCB, hinge cover and Ice-making PCB are plugged in place and whether there are foreign matters in them; after cleaning the terminals, plug them in again. Three indicators blink at the same time. Step 2: If the fault still occurs, pull out all connection terminals, use a multimeter to check the resistance value of the wire between the dispenser display PCB and the Ice-making PCB...

  • Page 58: Demo Mode

    Service Manual_2023-V2.0 Test items Setting Method Setting result Unlock the display control panel first. Keep pressing the “LOCK” and “FRZ. LED indicators display “0”, then the refrigerator enters into test mode Enter Test TEMP” button for 3 seconds and Mode release After entering into test mode, if no The refrigerator will exit the test mode...

  • Page 59: Backup Data For Power Fail

    Service Manual_2023-V2.0 Mode state: The display board and lighting will light up normally, the compressor, fan motor, defrost heater, ice maker, water dispenser stop working. Exit: Unlock the display control panel first, press the "D" and "E" button at the same time for 3 seconds again, all lights on the display board show for 2 seconds and then the unit will exit the mode after the display control panel locks.

  • Page 60: Compressor

    Service Manual_2023-V2.0 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 freezer room ≤ Shutdown temperature of freezer room 2) Enter defrosting cycle 3) The compressor runs continuously for more than 3 hours, will stop at least 5 minutes 1.2 When all the following conditions are met, the compressor starts up: 1) Measured temperature in freezer room ≥...
  • Page 61 Service Manual_2023-V2.0 Step 4: If the connection is fine, replace a new compressor Step 1: Measure whether the U-V-W resistance of compressor is same Blink eight times: light 0.5 second, Misstep extinguish 0.5 second, interval Step 2: If ok, replace a new inverter board protection time(extinguish) is 2 second Step 3: If the fault still occurs, replace a new...

  • Page 62: Troubleshooting Method

    Service Manual_2023-V2.0 11. Troubleshooting Method 11.1 No cooling (Air cooling-Electronic)

  • Page 63: No Working Of Compressor

    Service Manual_2023-V2.0 11.2 No working of compressor...

  • Page 64: Inside Frosting, No Defrosting

    Service Manual_2023-V2.0 11.3 Inside frosting, no defrosting...

  • Page 65: Inside Frosting, No Defrosting-Maintenance Guidelines

    Service Manual_2023-V2.0 11.4 Inside frosting, no defrosting-Maintenance guidelines...

  • Page 66: Light Is Not On

    Service Manual_2023-V2.0 11.5 Light is not on...

  • Page 67: Fan Failure

    Service Manual_2023-V2.0 11.6 Fan failure 11.7 Defective defrost circuit...

  • Page 68: Noise

    Service Manual_2023-V2.0 11.8 Noise 11.9 Air duct not operated...

  • Page 69: Ice Maker Not Make Ice（Option

    Service Manual_2023-V2.0 11.10 Ice maker not make ice（Option）...

  • Page 70: No Ice Or Crushed Ice Falling Off The Distributor（Option

    Service Manual_2023-V2.0 11.11 No ice or crushed ice falling off the distributor（Option）...

  • Page 71: Product Exploded View And Spare Parts List

    Service Manual_2023-V2.0 12. Product exploded view and spare parts list Please log in to TSP system to view and download these contents.
  • Page 72 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...

This manual is also suitable for:

Hc-957wenUr-bcd746we-dt

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