Midea BMF No Frost Series User manual

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Service Manual
BMF No Frost Series
Applicable Models
Model Code
Applicable Models
HD-332RWN
CE-BCD255WE-JT
22031020008081
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, 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.

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Contents
1. SIGNIFICANT UPDATE NOTES (NONE).............................................................................................................5
2. SAFETY WARNING CODE....................................................................................................................................6
2.1WARNING FOR OPERATION SAFETY ........................................................................................................................... 6
2.2 SAFETY INSTRUCTION FOR REFRIGERANT................................................................................................................. 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 ........................................................................................................................... 12
3.5 LEFT OR RIGHT OPEN DOOR REVERSAL................................................................................................................... 13
4. MAIN PARTS AND EXTERNAL DIMENSION....................................................................................................16
4.1 MAIN PARTS.............................................................................................................................................................. 16
4.2 EXTERNAL DIMENSION.............................................................................................................................................. 17
4.3 MIDEA PRODUCT SERIAL NUMBER AND LOCATION ................................................................................................... 17
5. ELECTRIC CONTROL SYSTEM.........................................................................................................................19
5.1 ELECTRICAL PARAMETERS....................................................................................................................................... 19
5.2 CIRCUIT DIAGRAM .................................................................................................................................................... 19
5.3 MAIN CONTROL BOARD STRUCTURE DIAGRAM ........................................................................................................ 21
6. REFRIGERATION SYSTEM................................................................................................................................22
6.1 REFRIGERATING PIPING SYSTEM.............................................................................................................................. 22
6.2 COOLING PIPELINE AND DRAIN PIPE INSIDE THE CABINET........................................................................................ 22
6.3 CIRCULATING ROUTE OF COOLING AIR..................................................................................................................... 23
6.4WELDING POINTS IN CHAMBERS OR FOAM LAYER.................................................................................................... 23
6.5WELDING POINT IN THE COMPRESSOR CASE........................................................................................................... 24
7. DISMANTLING OF PARTS..................................................................................................................................25
7.1 PARTS ON THE DOOR................................................................................................................................................ 25
7.2 PARTS INSIDE THE REFRIGERATOR .......................................................................................................................... 25
7.3 LIGHT SYSTEM.......................................................................................................................................................... 26
7.4AIR DUCT COMPONENTS REFRIGERATING CHAMBER AND FAN MOTOR.................................................................... 27
7.5AIR DUCT COMPONENTS IN FREEZING CHAMBERAND FAN MOTOR.......................................................................... 28
7.6 EVAPORATOR AND DEFROST SYSTEM...................................................................................................................... 29
7.7 COMPRESSOR CASE................................................................................................................................................. 30
7.8 DISPLAY CONTROL BOARD ....................................................................................................................................... 35
7.9 MAIN CONTROL BOARD ............................................................................................................................................ 36
8. TEMPERATURE SENSING SYSTEM.................................................................................................................37
8.1 POSITION OF SENSORS............................................................................................................................................ 37

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8.2 REPLACEMENT OF SENSORS ................................................................................................................................... 37
8.3 SENSOR WITHOUT TERMINAL REPLACEMENT........................................................................................................... 38
8.4 SENSOR RESISTANCE (R/T)..................................................................................................................................... 39
9. FUNCTION AND OPERATION............................................................................................................................40
9.1 DISPLAY OPERATION PANEL ..................................................................................................................................... 40
9.2 DISPLAY.................................................................................................................................................................... 40
9.3 SETTING OF THE GEAR............................................................................................................................................. 40
9.4 LOCK AND UNLOCK SETTINGS.................................................................................................................................. 41
9.5 MEMORY FUNCTION.................................................................................................................................................. 41
9.6 CONTROL OF STANDBY FUNCTION ........................................................................................................................... 41
9.7 OPEN DOORALARM (NONE)..................................................................................................................................... 41
9.8 FUNCTION SELECTION (NONE)................................................................................................................................. 41
9.9 FAULT CODE AND SOLUTIONS................................................................................................................................... 41
9.10 DEFROSTING FUNCTION......................................................................................................................................... 42
9.11 TEST MODE............................................................................................................................................................. 43
10. COMPRESSOR ..................................................................................................................................................44
10.1 COMPRESSOR ONAND OFF CONTROL SPECIFICATIONS........................................................................................ 44
11. TROUBLESHOOTING METHOD......................................................................................................................45
11.1 NO COOLING (AIR COOLING-ELECTRONIC)............................................................................................................ 45
11.2 NO WORKING OF COMPRESSOR............................................................................................................................. 46
11.3 INSIDE FROSTING,NO DEFROSTING....................................................................................................................... 46
11.4 INSIDE FROSTING,NO DEFROSTING-MAINTENANCE GUIDELINES.......................................................................... 47
11.5 LIGHT IS NOT ON..................................................................................................................................................... 48
11.6 FAN FAILURE........................................................................................................................................................... 48
11.7 DEFECTIVE DEFROST CIRCUIT ............................................................................................................................... 49
11.8 NOISE ..................................................................................................................................................................... 49
11.9AIR DUCT NOT OPERATED(ELECTRONICALLY)(NONE)........................................................................................... 50
12. FIGURES AND DETAILS OF REPAIR PARTS................................................................................................51

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1. Significant update notes (None)

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2. Safety Warning Code
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.
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. Agrounding 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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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.

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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.
2.2 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.

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3. Installation and commissioning
3.1 Handling
Handling
1)Protect the refrigerator in moving it,Same as shown as lef
t photo, please move it by handcart with cushion
2)Remove all packing materials and bottom cushion, the m
ove into house for placement
3)After moving it to appropriate location, wait for 2 hours bef
ore power on.
3.2 Door Disassembly and Assembly
The refrigerator door needs to be dismantled if it cannot enter the room in the whole.
3.3 Installation location
Installation location
Refrigerator installed in the cabinet and
the size requirements such as the right
figure.

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Installation Steps
Push the refrigerator into the cabinet and adjusted it
to make the baffle flange touch the edge of the
cabinet, and the supporting limit is hooked to the
bottom edge of the cabinet.
Fix the lower support with screws, and cover the
screw cap.

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Fix the top baffle to the top of the cabinet with
screws, and cover the screw cap.
The lower door of the cabinet is opened to the
maximum angle, and the lower door of the
refrigerator is opened to the corresponding position.
Sliding the block to make inner edge align with the
door edge, then fix the block to the door with screw
and cover the screw cap. Fix the top door to the
cabinet door in the same way.

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The sealing strip in the accessory is sealed in the
gap between the cabinet and the refrigerator.
Installation is complete.
3.4 Leveling of the refrigerator
Leveling of the refrigerator
If the refrigerator cannot be placed steadily, adjust the
footing to level it.

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3.5 Left or right open door reversal
1. Power off the refrigerator, and remove all objects
from the door trays.
2. Remove the upper hinge and hole caps of
refrigerator door.
3. Remove the refrigerator door, the bottom hinge and
the hole cover.
4. Exchange the R bottom hinge and R upper hinge ,then
assemble them and assemble top hole caps .

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5. Remove the fixed block of refrigerator door and rotate
it for 180°, assemble it on other side of refrigerator door.
6. Remove the upper hinge of refrigerator door.
7. Remove the freezer door, the bottom hinge and the
hole caps.

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8. Exchange the F bottom hinge and F:upper hinge ,then
assemble them.
9. Remove the fixed block of refrigerator door and
rotate it for 180°，assemble it on other side of refrigerator
door.
10.Finished

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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)

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4.2 External dimension
Description
Code
Size (mm)
Height to Top of Case
A
1785
Width
B
540
Depth w/o Handles
C
545
Depth (90 deg. with Door Open)
D
1060
Height to match the cabinet
E
1775
Depth to match the cabinet
F
510
(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.

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2）Paste location
Some products also have S/N on the lower part of the right side of the Cabinet.

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5. Electric control system
5.1 Electrical parameters
市场型号 Applicable Model
HD-332RWEN
产品型号 Product Model
CE-BCD255WE-JT
产品编码 Product code
22031020008081
额定电压 Rated Voltage
200-240V、50Hz
项目 Item
规格 Specification
制冷剂 Refrigerant
R600a
压缩机型号和品牌 Compressor
PZ75H1X
(Part code : 11101010001986)
压缩机驱动类型 Starting device type
定速 Fixed Speed
压缩机 COP The COP of compressor
1.80 (W/W)
压缩机最大制冷量 The max cooling
capacity of compressor
137W
压缩机接线柱绕组值 Winding
resistance of compressor wiring
terminal (20℃)
主绕组 Rmc:29.6Ω±7%
副绕组 Rsc:31.5Ω±7%
Rms = Rmc + Rsc
绕组图示 Winding resistance picture
启动器 Starter(PTC)
型号：QPE2-A15MD3
过载保护器 Overload protector(OLP)
型号：DRB12N61A1
整体式启动器+保 护 器 Integrate
PTC+OLP
None
变频驱动板 Variable frequency
driver board
None
电容 Capacitor
3.0μF
电源滤波器 Power filter (EMI)
None
电源电抗器 Power reactor (EU EMC)
None
电机 Motor
冷冻室风扇电机 Fan motor of the
freezing chamber
DC12V、1.8W、2700r/min
冷藏室风扇电机 Fan motor of the
refrigerating chamber
DC12V、1.0W、1900r/min
电动风门 Electric damper
None
灯Lights
冷藏室灯 Lights inside the
refrigerating chamber
12V/2W

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冷冻室灯 Lights inside the freezing
chamber
None
其它灯 Others Lights
None
冰箱灯开关 Switch of the light
■机械 Mechanical switch
□磁控 Magnetism control switch
化霜部件 Defrosting parts
化霜传感器 Defrosting sensor
型号：NTC B3839 ( B5/25=3839K±2% )
冷冻室化霜熔断器 Fuse in freezing
chamber
230V、77(0 ～-5) ℃
冷冻室化霜加热器 Defrost heater in
freezing chamber
230V、170W
5.2 Circuit diagram
F: Freezer R: Refrigerator RD: Refrigerator defrost FD: Freezer defrost
HW: Ambient temperature