This service manual details the Midea French-Door Series refrigerator, specifically models HQ-827WEN and UR-BCD636WE-ST, with a production code of 22031040001341. It serves as a comprehensive guide for maintenance personnel with electrical, electronic, and mechanical experience, emphasizing safety and proper repair procedures.
Function Description:
The device is a French-Door refrigerator designed for household and similar environments. It features a refrigerator chamber at the top and a freezer chamber at the bottom, with an ice maker system. The refrigeration system utilizes an R600a refrigerant and a DC Inverter compressor (TRA100E23DAH, part code: 11101020001442). The electric control system manages temperature, defrosting, fan operation, and lighting.
Important Technical Specifications:
- Applicable Models: HQ-827WEN, UR-BCD636WE-ST
- Rated Voltage: 115V, 60Hz
- Refrigerant: R600a
- Compressor: TRA100E23DAH (DC Inverter), Max cooling capacity: 255W, COP: 2.00 (W/W)
- Inverter Driver Board: Part code: 17131000005321
- Fan Motors:
- Freezing chamber: DC12V, 3.0W, 1800r/min
- Refrigerating chamber: None
- Condensation fan motor (compressor case): DC12V, 2.5W, 1300r/min
- Electric Damper and Heater: DC12V, 1W
- Ice Maker: DC12V, 0.6W
- Lights:
- Freezing chamber: DC12V, 0.6W
- Top of refrigerating chamber: DC12V, 1.6W
- Both sides of refrigerating chamber: DC12V, 1W
- Defrosting Sensor: NTC B3839 (B5/25=3839K±2%)
- Defrost Heater (freezing chamber): AC230V, 190W
- Flipping Beam Heating Wire: AC220V, 11W
- Heating Wire for Freezing Inlet Water Pipe (Option): DC12V, 2.5W
- Water Valve: 220-240V 20W
- External Dimensions (HQ-827WEN):
- Height to Top of Case (A): 1775mm (69.88in)
- Width (B): 914mm (35.98in)
- Depth w/ No handle (C): 737mm (29.02in)
- Depth w/ Handle (C1): 795mm (31.30in)
- Depth w/ No door (C2): 625mm (24.61in)
- Depth (Door open 90 deg. w) (D): 1097mm (43.19in)
- Width (Door open 90 deg. w) No handle (E): 1032mm (40.63in)
- Width (Door open 90 deg. w) Handle (E1): 1144mm (45.04in)
- Depth (Door open 135 deg. w) (F): 1047mm (41.22in)
- Width (Door open 135 deg. w) No handle (G): 1600mm (63in)
- Width (Door open 135 deg. w) Handle (G1): 1647mm (64.84in)
- Water Pressure for Ice Maker: 0.17 MPa (24.95 PSI) to 0.82 MPa (119.66 PSI)
Usage Features:
The refrigerator features a display operation panel with buttons for:
- Ice maker mode (ON/OFF)
- Super cool mode (sets cooling temperature to 2°C)
- Refrigeration temperature adjustment (2°C to 8°C, 1°C increments)
- Freezing temperature adjustment (-24°C to -16°C, 1°C increments)
- Super freeze mode (sets freezing temperature to -24°C)
- Lock/unlock
- Fahrenheit and Celsius conversion (by pressing "FRIDGE" and "FREEZER" for 3 seconds)
- Open door alarm: A buzzer alarm sounds if a door is open for 120 seconds.
- Demo mode: Stops refrigeration and heating, display remains on.
- Backup data for power fail: Remembers running state and settings after 1 hour of continuous operation or setting changes.
Maintenance Features:
The manual provides detailed instructions for dismantling and replacing various parts, including:
- Door Disassembly and Assembly: Instructions for removing and reattaching refrigerator and freezer doors, including hinges and guide rails.
- Handle Installation: Steps for fastening handles to the door body.
- Door Leveling: Adjusting door height and alignment using gaskets and hinge screws.
- Internal Parts: Removing door gaskets, door trays, rollover beams, shelves, drawers, and their covers.
- Light System: Dismantling LED lamps and light switches in both chambers.
- Air Duct Components: Removing air duct covers, fan motors, and electric dampers in the refrigerating and freezing chambers.
- Evaporator and Defrost System: Disconnecting and removing the evaporator, defrost heater, and defrost sensor. The defrost heater, sensor, and fuse are integrated and replaced as a single unit.
- Compressor Case: Removing the rear cover, identifying piping system components (suction tube, dry filter, condenser fan, water tray, etc.), and detailed steps for compressor replacement, including cutting pipelines, removing screws/clamps, and welding.
- Display Control Board: Detaching the display panel, ceiling lamp, and PCB board.
- Main Control Board: Accessing and replacing the main PCB and inverter board located at the rear of the cabinet.
- Waterway System: Connecting the water pipe to the water tap and the refrigerator's inlet pipe.
- Temperature Sensing System: Locating and replacing temperature sensors in the freezing chamber, refrigerating chamber, ambient humidity sensor, and defrost sensor. Instructions are provided for sensor replacement without terminal replacement, involving cutting and re-connecting wires.
- Troubleshooting Method: Flowcharts are provided for common issues such as "No cooling," "No working of compressor," "Inside frosting, no defrosting," "Light is not on," "Fan failure," "Defective defrost circuit," "Noise," and "Air duct not operated (electronically)."
- Fault Codes: A table lists fault codes (E0, E1, E2, E4, E5, E6, E7, EH) and their corresponding maintenance steps.
- Test Modes: Instructions for entering and exiting various test modes, including a general test mode, forced cooling mode, forced defrosting mode, and an ice maker test.
- Product Exploded View and Spare Parts List: Available through the Midea TSP system for detailed component identification and ordering.
Safety warnings are prominently featured, advising against modifying the original design, emphasizing the replacement of critical parts with manufacturer-specified components, and cautioning about electrical shock hazards and flammable refrigerants (R600a). The manual also provides guidelines for proper disposal of the appliance due to flammable gas and refrigerant.
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