Haier DW-25L92 User manual

Service Manual
Deep Freezer-upright
DW-25L92•DW-40L92•DW-40L188•DW-25L300•DW-40L262
Haier Medical & Laboratory Products Co., Ltd.
DW-40L92
DW-40L188
DW-40L262
FILE No: HMRSM-02-002

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Effective models
This service manual is effective for following models
Model name
Product code
Voltage(V)
Frequency(Hz)
Plug-type
DW-25L92
BE02M9E0N
220-240
50
English Standard
英式三扁(flat)
DW-40L92
BE02M8E0N
220-240
50
EU Standard
欧式两圆一孔
BE02M7E0N
English Standard
英式三扁(flat)
DW-40L188
BE02P1E1T
220-240
50
EU Standard
欧式两圆一孔
BE02P2E1T
English Standard
英式三扁(flat)
DW-25L300
BE02QDE0N
220-240
50
English Standard
英式三圆(round)
DW-40L262
BE02Q4E1T
220-240
50
EU Standard
欧式两圆一孔
BE02Q3E1T
English Standard
英式三扁(flat)
BE02Q5E1T
English Standard
英式三圆(round)
BE02QBE0N
50/60
English Standard
英式三扁(flat)
BE02Q0E0A
America Standard
美式
BE02QCE0N
115
60
America Standard
美式

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Content
【Designation】.......................................................................................................................................................... 4
【Safe Caution】......................................................................................................................................................... 5
【Product appearance】.............................................................................................................................................. 6
【Product Specifications】....................................................................................................................................... 10
【Components and Function Modules】.................................................................................................................. 12
.【Disassemble Steps】............................................................................................................................................. 14
【Disassemble Steps】.............................................................................................................................................. 14
【Screen Control System】....................................................................................................................................... 16
【Control System Principle】................................................................................................................................... 18
【System Schematic Diagram】............................................................................................................................... 19
【System Circuit Diagram】..................................................................................................................................... 20
【Inspection and Maintenance Process for Typical Error】..................................................................................... 21
【FAQ&A】.............................................................................................................................................................. 22
【Cooling unit parts】............................................................................................................................................... 23
【product nameplate】.............................................................................................................................................. 24
【Refrigerant perfusion Details】............................................................................................................................. 26
【Troubleshooting】................................................................................................................................................. 27
【How to deal with poor cooling】........................................................................................................................... 26
【Used Spare Parts Photo Gallery】......................................................................................................................... 27
【Testing Date】....................................................................................................................................................... 28

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【Designation】
Regulations for type naming:
Note: rated volume can be the gross volume or effective volume; the manufacturer can decide it by
him according to the actual situation. The effective volume value must be marked on the nameplate
whether effective volume or gross volume is marked in the product name.
Examples:
DW-40L262 means that the Deep temperature storage refrigerator with the temperature at
characteristic temperature -40℃, horizontal and rated effective volume 262L.
DW
XX
X
XXX
X
A
Design No. is expressed with pinyin character
sequence
Rated volume value is shown with L
Classification of low temperature cabinet (W is
horizontal and L is vertical)
It shows the temperature at the characteristic point
inside cabinet (without minus mark)
(For example: temperature at the characteristic point
inside cabinet -40℃can be expressed as 40)
Low temperature cabinet
Deep temperature cabinet

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【Safe Caution】
1. If the voltage used is 10% higher or lower than rated voltage, an auto stabilizer above 1000W shall be
equipped. Power line that required for lengthening shall be with a cross section no less than 1mm.
2. An independent private jack shall be used and reliably connected. The power line for refrigerator is
equipped with three-wire, grounding-type plug which meets standard three-wire, grounding-type
receptacle. In no circumstance should the third plug foot (grounding) of the power line be cut or removed.
The plug shall be touchable after installation of refrigerator. Power line or plug with abrasion shall not be
used. Abraded or damaged power line shall be sent to maintenance point designated by the manufacturer
or be replaced by qualified personnel.
3. Hazardous articles of inflammable, explosive, materials such as acid and alkali with strong corrosion
are prohibited in the refrigerator.
4. Please don’t use flammable spray closely to avid fire.
5. When there is inflammable gas such as coal gas leakage:
●Shut the valve for leakage;
●Open the door and window for ventilation;
●Don’t pull out or insert power plug of the refrigerator.
6. Prevent children playing in the refrigerator to avoid accident.
7. Once the power of the refrigerator is cut, it shall be re-connected at least five minutes later to avoid
damage on compressor or the system. The power shall be cut for maintenance. Do not roll or damage the
power line.
8. Please wear protective equipments during accessing to the refrigerator to avoid freezing injury. When
the refrigerator is scrapped, please remove the doorman. The scrapped refrigerator shall be away from
fire and be sent to appointed site for disposition.

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【Product appearance】

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【Dimensions】
DW-25 L92/ DW-40L92
DW-40L188
DW-25L300/DW-40L262

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【Product Specifications】