Midea HD-676REWN Service Manual Download Page 2

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Service Manual_2020-V3.0

WARNING

Important Safety Notice

There are special components used in this equipment which are important for safety. These parts are

marked by

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

Important Safety Notice

The Maintenance Manual is only for the use of maintenance personnel with certain experience and

background in electrical, electronic and mechanical field.

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

written approval by the Overseas Sales Corporation of Midea Refrigerators.

Summary of Contents for HD-676REWN

Page 1: ...cable 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 ma...

Page 2: ...rmission of manufacturer WARNING Important Safety Notice The Maintenance Manual is only for the use of maintenance personnel with certain experience and background in electrical electronic and mechani...

Page 3: ...TRIC CONTROL SYSTEM 15 5 1 ELECTRICAL PARTS PARAMETERS 15 5 2 CIRCUIT DIAGRAM 17 5 3 MAIN PCB TERMINAL CONNECTION DIAGRAM 18 6 REFRIGERATION SYSTEM 19 6 1 REFRIGERATION SYSTEM WORKING PRINCIPLE 19 6 2...

Page 4: ...E 44 9 8 TEST MODE 44 9 9 DEMO MODE NONE 45 9 10 BACKUP DATA FOR POWER FAIL 45 10 COMPRESSOR 46 10 1 COMPRESSOR ON AND OFF CONTROL SPECIFICATIONS 46 11 TROUBLESHOOTING METHOD 47 11 1 NO COOLING AIR CO...

Page 5: ...Service Manual_2020 V3 0 5 1 Significant update notes None...

Page 6: ...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 blad...

Page 7: ...e 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 years and older and...

Page 8: ...tions are not completely understood or if doubt exists as to whether the freezer is properly grounded 2 2 Safety instruction for refrigerant Explosion Hazard Keep flammable materials and vapors such a...

Page 9: ...g it to appropriate location wait for 2 hou rs before power on 3 2 Door Disassembly and Assembly When the whole refrigerator cannot enter the room the door can be disassembled then assembled after ent...

Page 10: ...door shelves Remove all food from the inner door liner 2 Remove the left cover plate and the right top hinge cover then unscrew screws and remove the right top hinge Keep the screws to reuse 3 Lift t...

Page 11: ...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 a...

Page 12: ...Service Manual_2020 V3 0 12 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: ...shelf of refrigerator room Glass shelf of refrigerator room Vegetable crisper small tray in refrigerator room large tray in refrigerator room 4 2 External dimension Description Code Size mm Height to...

Page 14: ...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 Some pr...

Page 15: ...resistance of compressor wiring terminal 20 Rmc 5 05 7 Rsc 4 43 7 Rms Rmc Rsc Winding resistance picture Starter PTC QP2 4R7 Part co 12031000001063 Overload protector OLP DRB31T61A1 Part co 120310000...

Page 16: ...16 Others Lights None Switch of the light Mechanical switch Magnetism control switch Defrosting parts Defrosting sensor NTC B3839 B5 25 3839K 2 Fuse in freezing chamber 115V 77 0 5 Defrost heater in f...

Page 17: ...Service Manual_2020 V3 0 17 5 2 Circuit diagram F Freezer R Refrigerator AMB Ambient temperature...

Page 18: ...ing defrost heater 5 LED of freezing chamber 6 Display control panel 7 Fan of freezing chamber 8 Electric damper heater 9 Electric damper 10 LED of refrigeration chamber 11 Ambient temperature sensor...

Page 19: ...ration system 6 1 Refrigeration system working principle Compressor Right condenser Anti condensation tube Left Condenser Dry filter Capillary tube Evaporator Suction tube Compressor 6 2 Cooling pipel...

Page 20: ...ding 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 Copper pipe 6 Aluminum pipe 6 35 2 Heat tr...

Page 21: ...f condenser tube and inlet of dry filter Steel pipe 4 0 Copper pipe 4 0 4 Outlet of dry filter and inlet of freezer capillary Copper pipe 2 8 Copper pipe 1 8 5 Heat transition tube and Suction connect...

Page 22: ...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 7 2 Parts inside the refrigerator Refrigerator Fruit box cover Rem...

Page 23: ...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 7 3 Light system Light Light of the refrigerating...

Page 24: ...Service Manual_2020 V3 0 24 Light of the freezing...

Page 25: ...screwdriver and pull out the switch until the wire connector reveals The switch is locate in the top hinge cover of cabinet 1 Remove the screw of hinge cover 2 Remove the hinge cover 3 Remove the swit...

Page 26: ...or 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...

Page 27: ...s in the freezing chamber should be dismantled before removing the air duct components Remove the support iron screw Lift up the door of freezer remove the door from the slide rail Take out the freeze...

Page 28: ...he 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 ass...

Page 29: ...omponents in freezing chamber 2 Disconnect all connectors 3 Remove the welding on inlet and outlet tubes Remove two screws which are used to fix the evaporator and remove the evaporator Components on...

Page 30: ...Defrost heater The defrost heater is located at bottom of the evaporator 1 Disconnect the connector of defrost heater 2 Cut off the band which fixes the defrost heater 3 Take off the defrost heater fr...

Page 31: ...rmly and prevent the door dropping when the refrigerator dumping 2 Slowly tilt the refrigerator forward relying on the wall or a solid enough object leaving space to facilitate the operation For safet...

Page 32: ...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 7 Remov...

Page 33: ...emove the bolts by steps replace the compressor and reverse process can complete installation 10 Use Pipe cutter cut off the condenser tube then Shear off capillary by the capillary tube scissors 11 R...

Page 34: ...Ag welding rod Cu Cu tubes welding 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 s...

Page 35: ...eplace 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 fix...

Page 36: ...e 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 t...

Page 37: ...Manual_2020 V3 0 37 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 m...

Page 38: ...ment of sensors Sensor in refrigerating chamber 1 Before remove the sensor the duct assembly should be removedRemove the air duct assembly Remove the sensor Position of sensors Have 4 sensors Ambient...

Page 39: ...ensor 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 w...

Page 40: ...ged 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 Strip off t...

Page 41: ...5 315 29 84 20 1 687 20 4 00 18 90 5 41 00 5 060 30 86 00 1 617 19 2 20 17 87 6 42 80 4 818 31 87 80 1 550 18 0 40 16 90 7 44 60 4 589 32 89 60 1 486 17 1 40 15 98 8 46 40 4 372 33 91 40 1 426 16 3 2...

Page 42: ...press the middle gear to show operation Normal operation display When failure occurs the corresponding LED light group will display fault code circular display If no failure occurs the current operati...

Page 43: ...ere are foreign matters in them after cleaning the terminals plug them in again Step 2 If the fault still occurs pull out the corresponding connection terminal on the main PCB use a multimeter to chec...

Page 44: ...in a period between 6 and 24 hours as per the accumulative operation time of the Compressor Defrost in refrigerating chamber 1 Start Condition Refrigerate accumulated refrigeration over 6 hours begini...

Page 45: ...Or press the thermostat button once in mode operation then the refrigerator will exit the test mode and return to normal operation mode 9 9 Demo mode None 9 10 Backup data for power fail 1 The runnin...

Page 46: ...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 i...

Page 47: ...Service Manual_2020 V3 0 47 11 Troubleshooting Method 11 1 No cooling Air cooling Electronic...

Page 48: ...Service Manual_2020 V3 0 48...

Page 49: ...Service Manual_2020 V3 0 49 11 2 No working of compressor...

Page 50: ...Service Manual_2020 V3 0 50 11 3 Inside frosting no defrosting...

Page 51: ...Service Manual_2020 V3 0 51 11 4 Inside frosting no defrosting Maintenance guidelines...

Page 52: ...Service Manual_2020 V3 0 52 11 5 Light is not on...

Page 53: ...Service Manual_2020 V3 0 53 11 6 Fan failure 11 7 Defective defrost circuit...

Page 54: ...Service Manual_2020 V3 0 54 11 8 Noise 11 9 Air duct not operated...

Page 55: ...Service Manual_2020 V3 0 55 11 10 Ice makernot make ice Option...

Page 56: ...Service Manual_2020 V3 0 56 12 Product exploded view and spare parts list Please log in to TSP system to view and download these contents...

Page 57: ...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 abo...

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