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Haier DW-25L92 Service Manual

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

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  Summary of Contents for Haier DW-25L92

  • Page 1 Service Manual FILE No: HMRSM-02-002 Deep Freezer-upright DW-25L92•DW-40L92•DW-40L188•DW-25L300•DW-40L262 DW-40L92 DW-40L188 DW-40L262 Haier Medical & Laboratory Products Co., Ltd.
  • Page 2 Effective models This service manual is effective for following models Model name Product code Voltage(V) Frequency(Hz) Plug-type BE02M9E0N English Standard DW-25L92 220-240 英式三扁(flat) BE02M8E0N EU Standard 欧式两圆一孔 DW-40L92 220-240 BE02M7E0N English Standard 英式三扁(flat) BE02P1E1T EU Standard 欧式两圆一孔 DW-40L188 220-240 BE02P2E1T English Standard 英式三扁(flat)
  • Page 3: Table Of Contents

    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】.............................
  • Page 4: Designation

    【Designation】 Regulations for type naming: 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℃...
  • Page 5: Safe Caution

    【Safe Caution】 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. 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.
  • Page 6: Product Appearance

    【Product appearance】 6 / 33...
  • Page 7 7 / 33...
  • Page 8 8 / 33...
  • Page 9 【 】 Dimensions DW-25 L92/ DW-40L92 DW-40L188 DW-25L300/DW-40L262 9 / 33...
  • Page 10: Product Specifications

    【Product Specifications】 10 / 33...
  • Page 11 11 / 33...
  • Page 12: Components And Function Modules

    【Components and Function Modules】 1. Temperature control It is controlled by microcomputer with digital display for temperature while the inner temperature can be adjusted from -10℃~-25/-40℃; there is parameter setting for super low temperature alarming and break down memory. 2. Safety system 2 error alarming (high/low temperature alarming, sensor error alarming 2 alarming methods (sound buzzing alarming, red light alarming) Starting up delay protection function...
  • Page 13 5. Product graphical representation Remark:  For DW-25L92 Series or DW-40L92 Series, please take out the suite of lock catch from the accessory and install the lock catch on the left side of the box according to “Lock Catch Installation Instruction leaflet”...
  • Page 14: Disassemble Steps

    【Disassemble Steps】 1. Install the Handle ① .Align the handle to the screw hole on the door; ② .Use screw to fix the handle. 2. Disassemble steps for control board  Unscrew the following screws mark ed 1 and 2 in following figure, the control board can be fetched.
  • Page 15  The following is details for connection of computer board and ports; Mark “1” in the above figure is connecting port for power line to connect power line; mark “2” in the  above figure is sensor port to connect sensor line. 3.
  • Page 16: Screen Control System

    【Screen Control System】 1 External view of computer board 2 Basic parameters for computer board  Rated power 3W  Control current for press under normal operation shall be no more than 10A  The 30 seconds start delay for the first energization of press . In normal operation, each time it is shut down, start timing, the compressor will not start if the start up time is less than 5 minutes;...
  • Page 17 8 Temperature adjustment principle and alignment This machine adopts microcomputer controlled temperature control system to control on-off of the press. In electrified condition, the screen may display current temperature. If you want to change the set temperature, for example, change from -30℃ to -35℃, please operate as following: Press both “∧”...
  • Page 18: Control System Principle

    【Control System Principle】 1 Working principle for press on and off When inner temperature reaches set temperature, induct the temperature by sensor and change into electrical signal which is sent to control chip of computer board. By pre-set procedure, the chip then sends out stop order to compressor to shut it down.
  • Page 19: System Schematic Diagram

    【System Schematic Diagram】 19 / 33...
  • Page 20: System Circuit Diagram

    【System Circuit Diagram】 20 / 33...
  • Page 21: Inspection And Maintenance Process For Typical Error

    【Inspection and Maintenance Process for Typical Error】 Problem points Reason analysis Maintenance measures 1. the press can not start 1. The fuse is burned out. Change the fuse 2. Connecting parts of cabinet is Change socket connector. damaged. 3. The connecting line for electric Install correctly after inspection.
  • Page 22: Faq&A

    【FAQ&A】 Question Answers Measures able to adopt 1. Inner temperature is too high or Can be resolved by adjusting and detailed operation too low. control of temperature. instruction manual. 2. Sides of the refrigerator is hot. There anticoagulant near Can turn off the electric heating refrigerator open on side surface.
  • Page 23: Cooling Unit Parts

    115/60Hz Start capacitance 117U5023(240μF) compressor jiaxipera ZBC1115CY DW-25L92/300 power 220-240V/50HzHz Start capacitance TY-QZ-108 Refrigerant DW-40L R404a Refrigerant DW-25L R600a Fan motor DW-40L EBM AC230V/50/60Hz, 29/5W,1300rpm 0070809344 ,Haier PCB Display panel DW-25/40L92/188 0070809343 ,Haier PCB Display panel DW-25/40L262/300 23 / 33...
  • Page 24: Product Nameplate

    【product nameplate】 24 / 33...
  • Page 25 25 / 33...
  • Page 26: Refrigerant Perfusion Details

    【Refrigerant perfusion Details】 DW-40L188 DW-40L262 DW-40L262 DW-25L92 DW-25L300 Type DW-40L92 (220-240V/50 Hz /60Hz) (115V/60Hz) R404a R600a [Note] refrigerant type and weight of the nameplate subject shall not misuse of refrigerant. 26 / 33...
  • Page 27: Troubleshooting

    【Troubleshooting】 Fault Analysis Maintenance Measures 1. Machine storehouse wiring connector plugs s are Change the connector plugs damaged Check contact and make in good 2. Bas wire contact condition. Checking if it is due to bad 3. Display panel connection failure 1.
  • Page 28: How To Deal With Poor Cooling

    【How to deal with poor cooling】 Refrigerator temperature ≥ high temperature alarm set temperature (high temperature alarm set temperature ≥ run set temperature +5 ° C) Check the display board LED High temperature alarm lights and control circuit Lights flashing Check the control panel After 15 minutes flashing buzzer and control circuits...
  • Page 29: Used Spare Parts Photo Gallery

    【Used Spare Parts Photo Gallery】 DW-25/40L262/300 Exploded view DW-25/40L262/300 spare part list Code Name Screw 15M6*16 0060802007 Seat of lower hinge Q215-A5mm 0060100278 Washer 65Mn 0064240002 Rotation shaft 15 0067113077 Washer PA white 0067744009 Right limit block PP 0060201602 DW-40L262 evaporator 0070809547 Left limit block PP 0060201601...
  • Page 30 Compressor 0075010051 DW-40L SC12CL(220-240V/50Hz) Compressor 0274000190 1 DW-40L SC12CLX.2(220-240V/50Hz/60Hz) Compressor 0074091173 SC12CLX.2(115/60Hz) 1 DW-40L DW-40L262 drier filter 0070701909 Compressor wire 0070401698 Wire connection box 0072040045 Screw 0077050051 Cover of cabin 0070107165 ROHS-sealing tube(black)490MM 0073150003 Screw 0077050051 built-in fitting parts PP 0067412381 Condenser 0060502027...
  • Page 31 DW-25/40L92exploded view DW-25L92spare part list Code Name Screw 15M6*16 0060802007 Seat of lower hinge 00609380634 Washer 65Mn 0064240002 Rotation shaft 15 0067113077 Washer of hinge 0067744009 Evaporator 0270700332 Foaming cabinet 0060809635 Fix board of compressor 0070104306 clips 0072130028 Power cable cn 0060611001 0070400325D Euro power cable British 3-pinpower cable...
  • Page 32 DW-40L188 compressor wire RVV3 ×0.75 0070401698 Wire connect box 0072040045 Screw 0077050051 Cover of cabin 0070107165 Screw 15B3.5*9.5 0060801078 Built-in fitting of condenser PP 0067412381 Condenser 00605020261 Inner pipe suit PVC 0067266077 Seal of power cable 0060211012 Support board 0060106846 Upper hinge 188/368 0060812716 Screw...
  • Page 33 Inspired living Haier Medical & Laboratory Products Co., Ltd. Room 403D, Brand Building, Haier Industrial Park, No.1 Haier Road Qingdao China Website: www.haiermedical.com 33 / 33...

This manual is also suitable for:

Dw-40l92Dw-40l188Dw-40l262Dw-25l300