Midea FDB Series User manual

Service Manual_2018-V1.0
1
Service Manual FDB SERIES
(The picture in this service manual is
only for reference, and specific
appearance and configuration are
subject to the real product)
Applicable Models
Model Code
UL-BCD636WE-ST
22031040001001
Prepared by
R&D:Wang Jian
Reviewed by
QA:Cheng Yi
SVC:Liu Jicheng
Approved by
R&D:Chen Pingchuan
SVC:Guang Taoshuai

Service Manual_2018-V1.0
2
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
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.

Service Manual_2018-V1.0
3
Contents
1. SAFETY WARNING CODE............................................................................................................................. 5
1.1WARNING FOR OPERATION SAFETY................................................................................................................ 5
1.2 SAFETY INSTRUCTION FOR REFRIGERANT ...................................................................................................... 7
2. DESCRIPTION FOR PRODUCT FEATURES ................................................................................................ 8
3. INSTALLATION AND COMMISSIONING....................................................................................................... 9
3.1 HANDLING.................................................................................................................................................... 9
3.2 DOOR DISASSEMBLY AND ASSEMBLY ............................................................................................................. 9
3.3 INSTALLATION LOCATION ............................................................................................................................... 9
3.4 LEVELING OF THE REFRIGERATOR................................................................................................................ 10
3.5 DOOR REVERSAL(NONE) ............................................................................................................................ 10
3.6 INSTALLATION OF HANDLE............................................................................................................................ 10
3.7 INSTALLATION OF DOOR LOCK...................................................................................................................... 10
3.8ADJUSTMENT TO LEVEL THE DOOR............................................................................................................... 10
3.9ADJUSTMENT TO SHELVES........................................................................................................................... 10
4. TERMS ...........................................................................................................................................................11
4.1 DEFINITION OF MODEL(NONE)......................................................................................................................11
4.2 LOCATION OF NAMEPLATE(NONE).................................................................................................................11
5. PRODUCT SPECIFICATION ........................................................................................................................ 12
5.1 TYPE SPECIFICATION(NONE)....................................................................................................................... 12
5.2 ELECTRICAL PARAMETERS .......................................................................................................................... 12
5.3INSIDE TEMPERATURE................................................................................................................................. 13
5.4 DEFROSTING PARTS.................................................................................................................................... 13
5.5 CIRCUIT DIAGRAM....................................................................................................................................... 14
6. INTERNAL VIEW AND DIMENSION............................................................................................................ 15
6.1 MAIN PARTS AND THEIR NAMES.................................................................................................................... 15
6.2 EXTERNAL DIMENSION ................................................................................................................................ 15
7.REFRIGERATING PIPING SYSTEM AND CIRCULATING ROUTE OF COOLING AIR.............................. 16
7.1 REFRIGERATING PIPING SYSTEM.................................................................................................................. 16
7.2 CIRCULATING ROUTE OF COOLING AIR.......................................................................................................... 17
8. DISMANTLING OF PARTS........................................................................................................................... 18
8.1 PARTS ON THE DOOR .................................................................................................................................. 18
8.2 PARTS INSIDE THE REFRIGERATOR............................................................................................................... 20
8.3 LIGHT SYSTEM............................................................................................................................................ 21
8.4AIR DUCTAND FAN MOTOR........................................................................................................................... 22
8.5 EVAPORATOR AND TEMPERATURE SENSING SYSTEM ..................................................................................... 24
8.6 COMPRESSOR CASE................................................................................................................................... 25

Service Manual_2018-V1.0
4
8.7 DISPLAY CONTROL BOARD........................................................................................................................... 27
8.8 MAIN CONTROL BOARD ............................................................................................................................... 28
8.9 BAR COUNTER............................................................................................................................................ 30
8.10WATER DISPENSER................................................................................................................................... 30
8.11ICE MAKER ................................................................................................................................................ 30
8.12WATER FILTER ........................................................................................................................................... 31
9. FUNCTION AND OPERATION ..................................................................................................................... 32
9.1 OPERATION PANEL...................................................................................................................................... 32
9.2 DISPLAY..................................................................................................................................................... 32
9.3 TEMPERATURE SETTING.............................................................................................................................. 32
9.4 MODE SETTING........................................................................................................................................... 33
9.4.1 SUPER FREEZE MODE.............................................................................................................................. 33
9.5 FAULT CODE AND SOLUTIONS....................................................................................................................... 34
9.6 DEFROSTING FUNCTION.............................................................................................................................. 35
9.7 TEST MODE................................................................................................................................................ 36
10. CIRCUIT DESCRIPTION ............................................................................................................................ 37
10.1 SENSOR RESISTANCE(R/T)....................................................................................................................... 37
11. TROUBLESHOOTING METHOD................................................................................................................ 38
11.1 NO COOLING(AIR COOLING-ELECTRONIC).................................................................................................. 38
11.2 NO WORKING OF COMPRESSOR................................................................................................................. 39
11.3 INSIDE FROSTING,NO DEFROSTING............................................................................................................ 39
11.4 INSIDE FROSTING,NO DEFROSTING-MAINTENANCE GUIDELINES................................................................... 40
11.5 LIGHT IS NOT ON....................................................................................................................................... 41
11.6AIR DUCT NOT OPERATED(ELECTRONICALLY).............................................................................................. 41
11.7 FAN FAILURE............................................................................................................................................. 42
11.8 DEFECTIVE DEFROST CIRCUIT.................................................................................................................... 42
11.9 NOISE...................................................................................................................................................... 43
12. FIGURES AND DETAILS OF REPAIR PARTS (DOCUMENTS ARE PROVIDED IN THE TSP) .............. 44
13. APPENDIX................................................................................................................................................... 45
13.1 REFRIGERATOR MAINTENANCE TOOLING AND EQUIPMENTAND MATERIAL...................................................... 45

Service Manual_2018-V1.0
5
1. Safety Warning Code
1.1 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.
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 availableAC power matches the voltage requirements of this
appliance.

Service Manual_2018-V1.0
6
CONNECTING ELECTRICITY
Electrical Shock Hazard.
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 freezer and the built-in structure,
clear of obstruction.
2) WARNING–Do not touch the interior of the freezer 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 freezer.
6) WARNING–DANGER–Never allow children to play with, operate, or crawl inside the
freezer. Risk of child entrapment. Before you throw away your old freezer:
6-1) Take off the doors
6-2) Leave 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 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 freezer in a safe way and
understand the hazards involved. Children should not play with the freezer. 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 freezer according to local regulations as the freezer contains
flammable gas and refrigerant.
11) Follow local regulations regarding disposal of the freezer 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.
12) This freezer is intended to be used in household and similar environments.

Service Manual_2018-V1.0
7
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.
Grounding requirement
This freezer must be grounded. This freezer 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 freezer is properly grounded.
1.2 Safety instruction for refrigerant
Explosion Hazard.
Keep flammable materials and vapors, such as gasoline, away from freezer. Failure to do so
can result in fire, explosion, or death.
Safety instruction for refrigerant
DANGER–Risk of Fire or Explosion. Flammable Refrigerant Used. To Be Repaired Only By
Trained Service Personnel. Do Not Use Mechanical Devices. Do Not Puncture Refrigerant
Tubing. CAUTION–Risk of Fire or Explosion. Flammable Refrigerant Used. Consult Repair
Manual/Owner’s Guide Before Attempting To Service This Product. All Safety Precautions
Must be Followed. CAUTION–Risk of Fire or Explosion. Dispose of Properly InAccordance
With Federal Or Local Regulations. Flammable Refrigerant Used. CAUTION–Risk of Fire or
Explosion Due To Puncture Of Refrigerant Tubing; Follow Handling Instructions Carefully.
Flammable Refrigerant Used.

Service Manual_2018-V1.0
8
2. Description for product features
This product is provided with following features:
1）Full air-cooling and frost-free design
2）Electronic temperature control system with more accurate temperature control
3）The big freezer, may store a lot of frozen foods

Service Manual_2018-V1.0
9
3. Installation and commissioning
3.1 Handling
Handling
1)Protect the refrigerator in moving it,Same as shown as
left photo, please move it by handcart with cushion;
2)Remove all packing materials and bottom cushion, the
move into house for placement;
3)After moving it to appropriate location, wait for 2 hours
before power on.
3.2 Door Disassembly and Assembly
The refrigerator door needs to be dismantled if it cannot enter the room in the whole.
Disassembly of Freezer door
Disassembly of Freezer door
None
Disassembly of refrigerator door
Disassembly of refrigerator door
None
3.3 Installation location
Installation location
Location that is easy for ventilation shall be chosen to
facilitate heat dissipation, enhance its performance and
reduce the energy consumption.

Service Manual_2018-V1.0
10
3.4 Leveling of the refrigerator
Leveling of the refrigerator
If the refrigerator cannot be placed steadily, adjust the
footing to level it.
3.5 Door reversal(None)
3.6 Installation of handle
Installation of handle
Installation of handle
None
3.7 Installation of door lock
Installation of door lock
Installation of door lock
None
3.8 Adjustment to level the door
Adjustment to level the door
Stuff the adjusting gasket in the hinge under the door to
be adjusted, so that the height of the left and right doors
can be consistent.
3.9 Adjustment to shelves
Adjustment to shelves
Adjustment to shelves
None

Service Manual_2018-V1.0
11
4. Terms
4.1 Definition of model(None)
4.2 Location of nameplate(None)

Service Manual_2018-V1.0
12
5. Product specification
5.1 Type specification(None)
5.2 Electrical parameters
Product Name
UL-BCD636WE-S
/
Product Code
22031040001001
/
Name
Item
Type
Specification
Specification
Compresso
r
Compressor
inverter
compressor
EEI76CE13DCH
/
Starter
PTC
/
/
Overload
protector
OLP
MM3-71CCX
/
Winding
resistance of
compressor
wiring
terminal
20℃U-V12.4Ω±5%
20℃V-W12.4Ω±5%
20℃W-U12.4Ω±5%
/
Variable
frequency
driver board
/
ITRP04BX1.A
110V/50 or 60Hz
/
Motor
Fan motor of
the freezing
chamber
/
DC 12V/1600±100
/
Ventilation
door of the
refrigerating
chamber
/
/
/
Electric
switch valve
/
/
/
refrigerator
damper
/
DC 12V,1W
/
Condensatio
n fan
/
DC 12V/1150±150
/
Lights
inside the
refrigerator
Lights inside
the freezing
chamber
LED
12V/≤0.6W
/
Lights inside
LED
12V/≤1.6W
/

Service Manual_2018-V1.0
13
the
refrigerating
chamber
The side
light of
refrigerating
chamber
LED
12V/≤1W
/
Switch
Switch of the
refrigerating
chamber
door
Pillar switch
M7G7-505,
VDE，CQC
/
Switch of the
freezing
chamber
Door
Sector-shaped
switch
2027
VDE，CQC
/
5.3 Inside temperature
Temperature tolerance ≤ 2 oC
Compartment
The highest
Lowest
Freezing
-14oC( 6.8℉)
-22oC ( -7.6℉)
Refrigerating
7oC( 44.6℉)
1oC ( 33.8℉)
Variable temperature
/
/
5.4 Defrosting parts
Item
Initial defrosting period
Normal defrosting period
Defrosting period
6hours
6-48 hours
Defrosting sensor
NTC
NTC
Defrosting temperature
controller
None
None
Thermal fuse
Can’t be restored
77℃( 170.6℉)
Defrosting heater in freezing
chamber
Steel pipe
Defrosting heater 115V/190W

Service Manual_2018-V1.0
14
5.5 Circuit diagram
F: Freezer; R: Refrigerator; FD: Freezer Defrost; C: Condensation.

Service Manual_2018-V1.0
15
6. Internal view and dimension
6.1 Main parts and their names
Refrigerator chamber
Freezer chamber
6.2 External dimension
Description
Code
Size (mm)
Size (in)
Height to Top of Case
A
1775
70
Width
B
910
35.8
Depth
C
737
29.0
Depth (135deg. with Door Open)
D
993
39.1
Width (door open 135 deg.)
E
1593
62.7

Service Manual_2018-V1.0
16
7.Refrigerating piping system and circulating route of cooling air
7.1 Refrigerating piping system
❶→❷→❸→❹→→❺→❻→❼→❽❶Compressor→❷Condenser→❸Anti-condensation
tube→❹Dry filter→❺Capillary tube→❻Evaporator→❼Suction tube→❽Compressor

Service Manual_2018-V1.0
17
7.2 Circulating route of cooling air

Service Manual_2018-V1.0
18
8. Dismantling of parts
8.1 Parts on the door
Door seal
Door seal is installed into door liner groove.
1）Open the refrigerator door;
2）Take the door seal ①out of door liner.
Door tray
While squeezing it inward, lift up the baffle and
take it out from refrigerator liner.
rollover beam
Use a Philips screwdriver to remove the total of
2 screws;

Service Manual_2018-V1.0
19
1）pull out the upper part on the rollover beam to
separate the upper part from the door;
2）pull out the whole rollover beam to seperature
the lower part from the door;
3）Unplug the wire terminal, remove the rollover
beam, reverse the operation to complete the
installation.
Disassembly and assembly of freezer door and annex
1) open the refrigerator doors, and pull the freezer
drawer outwards to the end, then incline the inside
drawer liner at an angle and take it out;
2）With the assistive tooling, press down left and
right bottom of bracket;

Service Manual_2018-V1.0
20
3) Continue to pull drawer outwards so as to
separate the metal guide rail;
4)Place the upper freezer drawer on ground as
the way shown in the right picture;
5）)Separate the metal connection lever by pull the
guide rail to the opposite direction;
6）Push the gear slantingly as shown in right
picture, and separate the gear from the guide rail.
8.2 Parts inside the refrigerator
Shelves
1) Hold the front edge of glass shelf by uplift by
certain angle;
2) Uplift the glass shelf ,and separate it from the
shelf;
3）Take out the shelf horizontally.