Midea UR-BCD830WX-ST User manual

Service Manual_2023-V1.0
1
Service Manual
French-Door Series
Applicable Models
Product Models
Applicable Models
HC-1079WE
UR-BCD830WX-ST
22031040002601
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.

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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, CircuitBoard 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 originaldesign 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
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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Contents
1. SAFETY WARNING.........................................................................................................................................................................6
1.1 WARNING FOR OPERATION SAFETY..........................................................................................................................................6
1.2 SAFETY INSTRUCTION FOR REFRIGERANT ..............................................................................................................................8
2. INSTALLATION AND COMMISSIONING................................................................................................................................9
2.1 HANDLING INTO THE ROOM .........................................................................................................................................................9
2.2 DOOR DISASSEMBLY AND ASSEMBLY .................................................................................................................................... 10
2.3 INSTALLATION OF THE REFRIGERATOR ................................................................................................................................... 13
2.4 INSTALLATION OF THE DOOR HANDLE（OPTION）............................................................................................................ 15
2.5 LEVELING OF THE REFRIGERATOR ......................................................................................................................................... 16
2.6 ADJUSTMENT OF DOORS UNEVENNESS................................................................................................................................ 16
3. MAIN PARTS AND EXTERNAL DIMENSION .................................................................................................................... 19
3.1 MAIN PARTS................................................................................................................................................................................. 19
3.2 EXTERNAL DIMENSION .............................................................................................................................................................. 20
3.3 MIDEA PRODUCT SERIAL NUMBER AND LOCATION ............................................................................................................... 20
4. ELECTRIC CONTROL SYSTEM............................................................................................................................................. 22
4.1 ELECTRICAL PARTS PARAMETERS........................................................................................................................................... 22
4.2 PRODUCT CIRCUIT DIAGRAM .................................................................................................................................................. 24
4.3 MAIN CONTROL BOARD TERMINALS DIAGRAM.................................................................................................................... 26
4.4 POWER & ICE-MAKING BOARD TERMINALS DIAGRAM....................................................................................................... 27
4.5 INVERTER DRIV ER BOARD TERMINALS DIAGRAM ............................................................................................................... 28
5. REFRIGERATION SYSTEM...................................................................................................................................................... 29
5.1 REFRIGERATION SYSTEM WORKING PRINCIPLE ................................................................................................................... 29
5.2 REFRIGERATION TUBES SYSTEM OF REFRIGERANT FLOW THROUGH ........................................................................... 30
5.3 CIRCULATION OF COLD AIR IN THE AIR DUCT........................................................................................................................ 31
5.4 TUBES AND AIR DUCTS INSIDE THE CABINET ........................................................................................................................ 32
5.5 WELDING POINTS IN CHAMBERS OR FOAM LAYER ............................................................................................................... 32
5.6 WELDING POINT IN THE COMPRESSOR CASE........................................................................................................................ 33
6. DISASSEMBLY AND ASSEMBLY OF COMPONENTS.................................................................................................. 34
6.1 PARTS ON THE DOOR ................................................................................................................................................................ 34
6.2 COMPONENTS IN THE CABINET................................................................................................................................................ 36
6.3 LIGHTING SYSTEM ...................................................................................................................................................................... 37
6.4 AIR DUCT AND DAMPER IN THE REFRIGERATED CHAMBER ................................................................................................ 39
6.5 ICE MAKING A IR DUCT AND FAN MOTOR.................................................................................................................................. 41
6.6 AIR DUCT AND FAN MOTOR IN THE FREEZ ER CHAMBER ..................................................................................................... 43
6.7 EVAPORATOR AND DEFROST COMPONENTS......................................................................................................................... 45
6.8 COMPONENTS IN THE COMPRESSOR COMPARTMENT ......................................................................................................... 49
6.9 MAIN PCB & POWER-ICE PCB & INV ERTER PCB ............................................................................................................. 57

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6.10 DISPLAY CONTROL BOARD..................................................................................................................................................... 59
6.11 WATER SUPPLY & ICE MAKING SYSTEM............................................................................................................................. 60
6.12 ICE MAKER................................................................................................................................................................................. 64
6.13 ICE PUSHING & CRUSHING COMPONENT ............................................................................................................................. 67
6.14 ICE & WATER DISPENSER ...................................................................................................................................................... 68
7. TEMPERATURE SENSING SYSTEM ................................................................................................................................... 70
7.1 POSITION OF SENSORS............................................................................................................................................................. 70
7.2 REPLACEMENT OF SENSORS ................................................................................................................................................... 70
7.3 SENSOR WITHOUT CONNECTOR REPLACEMENT .................................................................................................................. 73
7.4 SENSOR R/ T TABLE................................................................................................................................................................... 74
8. FUNCTION AND OPERATION................................................................................................................................................. 75
8.1 DISPLAY OPERATION PANEL ..................................................................................................................................................... 75
8.2 TEMPERATURE CONTROL ......................................................................................................................................................... 76
8.3 MODE SETTING ........................................................................................................................................................................... 76
8.4 DEFROSTING FUNCTION............................................................................................................................................................ 77
8.5 OPEN DOOR ALARM ................................................................................................................................................................... 78
8.6 ERROR CODE AND SOLUTIONS ................................................................................................................................................ 78
8.7 TEST MODE.................................................................................................................................................................................. 80
8.8 EYE DETECTION MODE OF ICE MAKER................................................................................................................................ 81
8.9 DEMO MODE................................................................................................................................................................................ 81
8.10 BACKUP DATA FOR POWER FAIL ............................................................................................................................................ 81
9. COMPRESSOR.............................................................................................................................................................................. 82
9.1 COMPRESSOR ON AND OFF CONTROL SPECIFICATIONS ..................................................................................................... 82
9.2 INVERTER BOARD FAULT ANALYSIS ......................................................................................................................................... 82
10. TROUBLESHOOTING METHOD.......................................................................................................................................... 84
10.1 ERROR CODE E0 ..................................................................................................................................................................... 84
10.2 ERROR CODE E1 / E2 / E3 / E4 / E5 / E7 / E8 / EE / C9 / CC / F4 ............................................................................. 85
10.3 ERROR CODE E6 ..................................................................................................................................................................... 86
10.4 ERROR CODE EF ..................................................................................................................................................................... 87
10.5 ERROR CODE EH.................................................................................................................................................................... 88
10.6 ERROR CODE EP..................................................................................................................................................................... 89
10.7 ERROR CODE CA .................................................................................................................................................................... 90
10.8 NOT COOLING IN ALL THE CHAMBERS .................................................................................................................................. 91
10.9 POOR COOLING IN ALL THE CHAMBERS............................................................................................................................... 92
10.10 OVERCOOLING IN THE REFRIGERATED CHAMBER........................................................................................................... 92
10.11 NOT & POOR COOLING IN THE REFRIGERATED CHAMBER............................................................................................. 93
10.12 NO WORKING OF COMPRESSOR......................................................................................................................................... 94
10.13 CONDENSATION & FROST ................................................................................................................................................... 95
10.14 DISPLAY PANEL FAILURE ...................................................................................................................................................... 96
10.15 LIGHT FAILURE ....................................................................................................................................................................... 96
10.16 NO WATER FROM THE ICE & WATER DISPENSER............................................................................................................. 97

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10.17 NO ICE FROM THE ICE & WATER DISPENSER.................................................................................................................... 98
10.18 NOISE ...................................................................................................................................................................................... 99
11. PRODUCT EXPLODED VIEW AND SPARE PARTS LIST .......................................................................................100

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1. SafetyWarning
1.1 Warning for Operation Safety
ImportantSafetyInstructions
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.
WARNING
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this appliance near water.
6) Clean only with a damp cloth.
7) Do not block any ventilation openings.
8) Install in accordance with the manufacturer’s instructions.
9) Do not install near 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 blades with one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replacement
of the obsolete outlet.
11) Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the appliance.
12) Do not attempt to modify or extend the power cord of this appliance.
13) Unplug this appliance during lightning storms or when it will not be used for long
periods of time.
14) make sure that the available AC power matches the voltage requirements of this
appliance.

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CONNECTINGELECTRICITY
ElectricalShockHazard.
Plug into a grounded 3-prong outlet.
Do not remove the ground prong.
Do not use an adapter.
Failure to follow these instructions can result in death, fire, or electrical shock.
WARNING
Electric Shock Hazard
Failure to follow these instructions can result in electric shock, fire, or death.
1) WARNING– Keep ventilation openings, in both the refrigerator and the built-in
structure, clear of obstruction.
2) WARNING– Do not touch the interior of the refrigerator with wet hands. This could
result in frost bite.
3) WARNING– Do not use mechanical devices or other means to accelerate the
defrosting process, other than those recommended by the manufacturer.
4) WARNING– Do not damage the refrigerant circuit.
5) WARNING– Do not damage the refrigerant tubing when handling, moving, or using
the refrigerator.
6) WARNING– DANGER– Never allow children to play with, operate, or crawl inside the
refrigerator. Risk of child entrapment.
Before you throw away your old refrigerator:
6-1) Take off the doors.
6-2) Leaves the shelves in place so that children may not easily climb inside.
7) Unplug the refrigerator before carrying out user maintenance on it.
8) This refrigerator can be used by children age eight years and older and persons with
reduced physical or mental capabilities or lack of experience and knowledge if they are
given supervision or instruction concerning the use of the refrigerator in a safe way and
understand the hazards involved. Children should not play with the refrigerator. Cleaning
and maintenance should not be performed by children without supervision.
9) If a component part is damaged, it must be replaced by the manufacturer, its service
agent, or similar qualified persons in order to avoid a hazard.
10) Please dispose of the refrigerator according to local regulations as the refrigerator
contains flammable gas and refrigerant.
11) Follow local regulations regarding disposal of the refrigerator due to flammable
refrigerant and gas. All refrigeration products contain refrigerants, which under the
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.

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12) This refrigerator 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
refrigerator.
14) Do not use extension cords or ungrounded (two-prong) adapters with this
refrigerator. If the power cord is too short, have a qualified electrician install an outlet near
the refrigerator. Use of an extension power cord can negatively affect the refrigerator’s
performance.
Grounding requirement
This refrigerator must be grounded. This refrigerator is equipped with a cord having a
grounding wire with a grounding plug. The plug must be inserted into an outlet that is
properly installed and grounded.
Improper use of the grounding plug can result in a risk of electric shock. Consult a
qualified electrician or service person if the grounding instructions are not completely
understood, or if doubt exists as to whether the refrigerator is properly grounded.
1.2 Safety Instruction for Refrigerant
ExplosionHazard.
Keep flammable materials and vapors, such as gasoline, away from refrigerator. Failure to
do so can result in fire, explosion, or death.
Safety instruction for refrigerant
DANGER–Risk of Fire or Explosion.
Flammable Refrigerant Used.
Dispose of Properly In Accordance With Federal Or Local Regulations.
To Be Repaired Only By Trained Service Personnel.
Consult Service Manual/Owner’s Guide Before Attempting To Repair This Product.
Do Not Use Mechanical Devices To Puncture Refrigerant Tubing.
All Safety Precautions Must be Followed.

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2. Installationandcommissioning
2.1 Handling into the room
Handling
1) Protect the refrigerator in moving it, same asshown as
the left photo. Recommend to use the handcart with
cushion.
2) For large size refrigerators, it is recommended that two
people handle it together.
3) Know the door size in advance.
4) Recommend to remove all packing and protective
materials such as the carton box and foam parts in the
cabinet, then move into the home for placement.
5) When the refrigerator cannot enter the room because
it's too big, you can remove the doors from the cabinet
and enter separately, then assemble them again.

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2.2 Door Disassembly and Assembly
When the refrigerator cannot enter the room because it's too big, you can remove the doors and enter
separately.
Tools required
Door assembly
1）In the state of refrigerator door closure, remove the
three fixing screws from the hinge cover and remove the
upper hinge cover.
2）When removing the left (right) door, remove the wiring
harness plug and water pipe connector on the left (right)
side, and remove the left (right) hinge fixing screw.

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3）Take down the left (right) hinge.
4）Open the door approximately 90°, lift the left (right)
refrigerated door in the direction of the arrow, and
remove it from the left (right) middle hinge;

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5）Remove the freezer door and pull the door open to
remove the drawer in the freezer room;
6）Freezer door removal method one：
Use a screwdriver to press the plastic latches in the
middle of the left and right guide rails, and pull the left
and right sides of the freezer door slightly outward. After
the plastic latches and guide rails on both sides are
removed, pull out the freezer door and remove it；

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Freezer door removal method two：
Remove the screws securing the left and right guide
rails and the freezer door, and lift the freezer door to
remove the door.
Assembly
1) Insert the metal slides on both sides of the freezer
door into the plastic rails of the cabinet, keep both
sides pushed in synchronously, and close the door
tightly. Make sure the door fit the cabinet closely.
2) Re-open the freezer bottom door, put the freezer
drawer on the slide and fix it well, then close the
door.
2.3 Installation of the refrigerator
Installation space
1) Please select a ventilated place to place the
refrigerator, and reserve space according to the
recommended size in the picture, which is beneficial
for heat dissipation, cooling performance
improvement and power consumption reduction.

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2) This refrigerator can be placed in a narrow space
such as a cabinet, please reserve space according
to the recommended size shown in the picture, and
set a large enough vent at the top and bottom of the
cabinet to allow air flow.

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After moving it to appropriate location, wait for at least 2
hours before power on. The main reason of resting is to
let the refrigerant and lubricant flow back, otherwise the
compressor may be damaged.Separate sockets
recommended, otherwise safety accidents can easily
occur.Attention! The refrigerator has a metal casing and
must be reliably grounded, otherwise an electric shock
accident may occur.
2.4 Installation of the Door Handle（Option）
Installation of handle
Installation of handle
1）Take out the bolts for fixing the handle from the
package bag of the user manual and then fasten it on the
door body with a cross screwdriver;
2）Take out the door handle from the refrigerating
chamber, and place it in the two handle fixed bolts in the
direction as shown in the attached diagram
3）Use the allen wrench to fasten the screws in two holes
of each handle with the handle fixing bolts;
4）The installation of freezer door handle is same as the
refrigerator door handle assembly step, the location is as
shown in the diagram. Please make sure the direction of
screw hole at where the tightening screw at both sides of
the handle is downward (towards the ground) during
installation.

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2.5 Leveling of the Refrigerator
Leveling of the case
1) The refrigerator can be leveled using the front
levelling feet on the bottom of the case.
2) Leveling can be done with a one-head screwdriver.
Turn the feet clockwise to raise the case, turn the
feet counterclockwise to lower the case.
2.6 Adjustment of Doors Unevenness
Adjustment of non-level on the top of two refrigerated doors
Stuff the spacers in the hinge under the door to be
adjusted, so that the height of the left and right doors can
be consistent.

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Adjustment of uneven gaps between two refrigerated doors
1) Use screwdriver to remove the 3 pcs screws, and
then remove the upper hinge cover.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 3
pcs screws.

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Adjustment of uneven plane between two refrigerated doors
1) First check the condition of the door gasket for
uneven thickness. If so, remove the door gasket and
reinstall it or replace it with a new one.
2) If not ok, use screwdriver to remove the 2 screws,
and then remove the upper hinge cover.
3) Use screwdriver to loosen the 2 screws, front and
back adjust the upper hinge to make door aperture
be homogeneity.
4) Put the hinge cover on suitable position, and then
use the screwdriver to fix the 2 screws.

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3. Mainpartsandexternaldimension
3.1 Main parts
(The picture is onlyfor reference, and specific appearance and configuration are subject to the real
product)

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3.2 External dimension
Description
Code
Size (mm)
Size (in)
Height to top of cabinet
A
1775
69.9
Width
B
910
35.8
Depth / + Door
C
862.5
34
Depth / + Handle
C1
918
36.1
Depth / Only Cabinet
C2
745
29.3
Depth (Door open 90° )
D
1221.5
48.1
Width (Door open 90°) No handle
E
1027
40.4
Width (Door open 90°) +Handle
E1
1139
44.8
Depth (Door open 135°)
F
1172
46.1
Width (Door open 135°) No handle
G
1593
62.7
Width (Door open 135°) + Handle
G1
1644
64.7
(The picture is onlyfor reference)
3.3 Midea product serial number and location
1） Product factory serial number — Include the product's order number, production date and other
information. When the product occur problems, it needs to be recorded or photographed.