Haier DW-86L338J Service Manual
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Haier DW-86L338J Service Manual

Ult freezer, biomedical after-sales
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Haier after-sales internal training information, external circulation is strictly prohibited
Biomedical After-sales Service Manual
Product type:
ULT Freezer
Product model: DW-86L338J/388J/578J/626/728J/828J/490J/100J
DW-86W420J/100J
Product illustration:
DW-86L338J/388J
DW-86L490J
DW-86W420J
DW-86W100J
/578J/626/728J/828J
DW-86L100J
No.: YL-P3-06-ULT DW-8 Energy-saving Series

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Summary of Contents for Haier DW-86L338J

  • Page 1 Haier after-sales internal training information, external circulation is strictly prohibited Biomedical After-sales Service Manual Product type: ULT Freezer Product model: DW-86L338J/388J/578J/626/728J/828J/490J/100J DW-86W420J/100J Product illustration: DW-86L338J/388J DW-86L490J DW-86W420J DW-86W100J /578J/626/728J/828J DW-86L100J No.: YL-P3-06-ULT DW-8 Energy-saving Series...
  • Page 2 ULT Energy-saving Series After-sales Service Manual Prepared by: Reviewed by: Approved by: Version: 01 Issue date:...
  • Page 3 ULT Energy-saving Series After-sales Service Manual Revision record Revision Revision Reviser Major revision content number date March 13, Zheng Addition of content for model DW-86L626, replacement of the 2018 Wendong original general compressor of DW-86L626 by hydrocarbon compressor. Use of hydrocarbon refrigerants with the model and name unchanged.

  • Page 4: Table Of Contents

    ULT Energy-saving Series After-sales Service Manual Contents I. Product features and model designation ........................6 1.1 Main functions and features of the product ..................... 6 1.2 Model designation ............................6 II. Product promotion points and selling points ......................7 2.2 Safety control: ..............................7 2.3 Refrigerating system: ............................
  • Page 5 ULT Energy-saving Series After-sales Service Manual 9.5 Adjustment method of temperature drift ......................37 9.6 Control of condenser fan:..........................38 9.7 Remote alarm function ........................... 38 9.8 Control of compressor ........................... 38 9.9 Voltage calibration ............................38 9.10 Adjustment of setting value ......................... 39 9.11 USB data download and time setting ......................

  • Page 6: Product Features And Model Designation

    ULT Energy-saving Series After-sales Service Manual I. Product features and model designation 1.1 Main functions and features of the product 1.1.1 The applicable temperature range in the ULT Freezer is -40°C~-86°C; 1.1.2 The design of pressure balance inside and outside the freezer facilitates door open and close; (DW-86L100J has a small door without balance hole that is easy to open) 1.1.3 The display board is divided into working area and alarm area, which can display the machine startup status, whether the network is connected, whether the voltage is increased or decreased, and lock display, at the same time,...

  • Page 7: Product Promotion Points And Selling Points

    ULT Energy-saving Series After-sales Service Manual Initial letters from "Di Wen" means low temperature II. Product promotion points and selling points 2.1 Temperature control: Computer controlled, digital display of temperature with adjustment unit of 1 °C, and the applicable temperature range is -40°C~- 86°C;...

  • Page 8: Temperature Monitoring Function

    ULT Energy-saving Series After-sales Service Manual time; 2.6 Temperature monitoring function 2.6.1 The alarm message on the device can be sent to registered mobile phone users in the form of SMS; 2.6.2 Users can send short messages to the device to query the real-time temperature and alarms; 2.6.3 The actual operating temperature in the freezer can be downloaded through USB data storage module;...

  • Page 9: Horizontal Freezer Series: Dw-86W100J Horizontal Freezer Series: Dw-86W420J

    ULT Energy-saving Series After-sales Service Manual Rear view Front view Internal structure 3.4 Horizontal freezer series: DW-86W100J Horizontal freezer series: DW-86W420J Front view Front view 3.5 Vertical under table series: DW-86L100J...

  • Page 10: Product Component Structure Name

    ULT Energy-saving Series After-sales Service Manual IV. Product component structure name 4.1 Display structure of display board Buzzer The sensor malfunction Low temperature alarm High temperature alarm Low battery Lock Network Operating Voltage stabilization Back-up system Power failure Door opening alarm Function Dirty condenser High ambient...
  • Page 11 ULT Energy-saving Series After-sales Service Manual Outer door: PU foam structure + Inner door: PU foam structure Outer door seal strip: Take it out of the fixing groove during replacement Inner door handle: Remove the side screw of the handle during replacement Inner seal strip of inner door: Take it out of the fixing groove...
  • Page 12 ULT Energy-saving Series After-sales Service Manual Outer door handle Balance hole Inner door seal strip Magnetism switch box for door Foam inner door opening alarm Outer door seal strip Inner door handle of J Inner door handle of model DW-86L626 Freezer back threading hole, which is a four- series channel structure...
  • Page 13 ULT Energy-saving Series After-sales Service Manual Microcomputer controlled with LED digital display of Stainless steel inner Clapboard Door magnet temperature in the freezer, with door Outer door: 70 mm voltage and ambient temperature, alarm indication, and compressor foam layer + 25 mm operation status displayed, with aviation vacuum VIP equipped...
  • Page 14 ULT Energy-saving Series After-sales Service Manual Main sensor housing Main sensor 5 V cold chain and IoT interface Hinge Test hole Caster and feet...

  • Page 15: Structure Of Electric Cabinet

    ULT Energy-saving Series After-sales Service Manual 4.3 Structure of electric cabinet R232/485 serial port Master control module port (optional) board Condenser fan Remote alarm wiring Power switch Battery High temperature relay Battery switch Low temperature relay Filter Terminal block Electric cabinet Computer board test button: Press the test Signal cable...
  • Page 16 ULT Energy-saving Series After-sales Service Manual Ambient temperature 232/485 interface sensor connection connection 4.3.1 Electric cabinet of model DW-86L100J Switch power supply Battery switch Remote alarm and 485 interface Master control board Main switch Filter Lead acid battery Socket-outlet Relay Atmosphere Micro channel condenser Compressor...
  • Page 17 ULT Energy-saving Series After-sales Service Manual Display board shiled Display board cover Communicati on cable USB drive board USB board USB communication cable USB board Master control board 5 V cold Backup system Frequency conversion Printer Networking Door switch Tri-color light chain board signal cable...
  • Page 18 ULT Energy-saving Series After-sales Service Manual Remote alarm and RS485 Main sensor Battery switch 4.3.2 Installation structure of electric cabinet (DW-86W420J) Battery Control board Terminal block Compressor relay...

  • Page 19: System Structure

    ULT Energy-saving Series After-sales Service Manual Power switch Battery switch Remote alarm interface Backup R232/485 interface 4.4 System structure Anti-dew tube Compressor: from the back, there high temperature stage system on the left side and low temperature High temperature stage system on the condenser right side Condenser fan...

  • Page 20: Product Instructions And Product Improvement

    ULT Energy-saving Series After-sales Service Manual High temperature compressor High temperature gas-liquid High temperature separator filter condenser Condenser fan Cryogenic compressor Low temperature filter Oil separator V. Product instructions and product improvement 5.1 Unlocking: First press the "Up" or "Down" button, the display screen shows "00", press " " to adjust to "06" ("06" is the password), and then press and hold the "Function Selection"...

  • Page 21: Fault Code Query

    ULT Energy-saving Series After-sales Service Manual conditioning in the environment where the product is used). 5.3.3 A socket should be equipped for each single equipment, and the power socket should withstand a current greater than 16 A and be reliably grounded. 5.3.4 Turn on the battery switch on the electric cabinet of the machine when it is powered on, and turn off the switch when it needs to be shut down for a long time.
  • Page 22 ULT Energy-saving Series After-sales Service Manual 4) In case of condenser sensor fault, the actual temperature and the condenser sensor fault code "E1" are displayed alternately on the display screen. Condenser sensor E1 5) In case of ambient temperature sensor fault, the actual temperature and the ambient temperature sensor fault code "E0"...

  • Page 23: Probe Resistance Changes With Temperature (Probe Type: Ntc, Which Is Mainly For Ambient Temperature Sensor, Condensation Temperature Sensor, And Heat Exchanger Sensor)

    ULT Energy-saving Series After-sales Service Manual Alarm Alarm Status Instruction Buzzer + remote alarm code It displays that the temperature is The alarm light High temperature higher than or equal to the high flickers and Buzzer alarm + remote alarm temperature alarm setting temperature overtemperature alarm output...

  • Page 24: Main Technical Parameters Of The Product

    119.4 68.3 96.1 123.2 IV. Main technical parameters of the product 6.1 List of technical parameters Model DW-86L578J DW-86L728J DW-86L338J DW-86L388J Technical parameter Product attributes Vertical, single door Climate type Control mode Microcomputer control Display LED display (minimum display accuracy of 1°C)
  • Page 25 ULT Energy-saving Series After-sales Service Manual door Seal structure of inner Single-layer silicone seal strip for Single-layer silicone seal strip for door independent inner door independent inner door Door lock Product Accessories Number of clapboards/inner doors Clapboard dimensions 602*680 750*680 449*595 (W*D) Caster/test hole...
  • Page 26 ULT Energy-saving Series After-sales Service Manual Display LED display (minimum display accuracy of 1°C) Temperature sensor PT100 Basic parameters Capacity (L) Voltage frequency (V/Hz) 220~240/50 220~240/50 Power (W) 1000 1000 Current (A) Internal dimensions 1367*462*652 470*450*480 (mm) (W*D*H) External dimensions 2130*870*1020 769*825*1120 (mm) (W*D*H)

  • Page 27: Product Nameplate

    See the Manual. Net weight: 380 kg Please refer to the Manual for other contents. Electric shock protection type: Address: Haier Industrial Park, Qingdao Economic Qingdao Haier Special Electrical and Technological Development Zone Service Appliances Co., Ltd. hotline: 4006 99 2008...

  • Page 28: Case Preventive Measures, Product Use And Daily Maintenance Knowledge

    Please refer to the Manual for other contents. Net weight: 108 kg Electric shock protection type: Address: Haier Industrial Park, Qingdao Economic Qingdao Haier Special Electrical and Technological Development Zone Service Appliances Co., Ltd. hotline: 4006 99 2017 VII. Case preventive measures, product use and daily maintenance knowledge 7.1 Principle of ultra-low temperature refrigeration:...

  • Page 29: Working Principle Of Pressure Switch

    ULT Energy-saving Series After-sales Service Manual freezer capacity. 4) Prohibition: All ULT Freezers are low temperature storage equipment, which are used to store low temperature items, and are not allowed to be used for quickly freezing plasmanate with high temperature. It is strictly prohibited to put too many relatively hot items at one time, which may cause the compressor to stay in operation for a long time, the temperature will not drop, and it is easy to burn the compressor, resulting in damage to the items in the freezer.
  • Page 30 ULT Energy-saving Series After-sales Service Manual high temperature stage system and low temperature stage system. Do not open the two systems at the same time during maintenance, and always separate one system from another. *The humidity in the maintenance workshop should not be too high. In case of cloudy and rainy days, it is forbidden to open the system.
  • Page 31 2 g must be prepared in the outlet before maintenance. Figure 5 Figure 6 Refrigerant filling capacity of products Refrigerant (type/capacity) 1 Refrigerant (type/capacity) 2 Model High temperature stage (g) Low temperature stage (g) R290 R290 R170 DW-86L338J DW-86L388J DW-86L490J DW-86L578J DW-86L626 DW-86L728J...

  • Page 32: System Schematic Diagram And Wiring Diagram

    ULT Energy-saving Series After-sales Service Manual DW-86L828J DW-86W100J DW-86W420J R600A of 75 g, R1150 of 15 DW-86L100J g, and R50 of 5 g VIII. System schematic diagram and wiring diagram Schematic diagram： High temperature capillary tube Cryogenic capillary tube Filter Evaporator Intermediate heat exchanger condenser...
  • Page 33 ULT Energy-saving Series After-sales Service Manual Wireless cold Lead storage battery USB adapter board chain power Display board supply plug USB drive board Magnetic door switch Inner temperature sensor Heat exchanger Computer Temperature sensor board Balance hole heating wire Condenser sensor Remote alarm wiring block Backup system terminal block Live wire...

  • Page 34: Specific Control, Working Principle And Parameters

    IX. Specific control, working principle and parameters Take the display panel of DW-86L338J as an example, which is LED display. 9.1 The temperature control system controlled by computer board controls the start and stop of the compressor 1) To adjust the setting value, unlocking must be carried out first.

  • Page 35: Display And Alarm

    ULT Energy-saving Series After-sales Service Manual seconds, the "Lock" light is off, enter the unlocking state, and the following settings can be carried out. Press the "Function Selection" button to circularly select the temperature setting, high temperature alarm setting and low temperature alarm setting in the freezer, and the corresponding indicator lights are on.

  • Page 36: Special Function Setting

    ULT Energy-saving Series After-sales Service Manual D. "Excessive Ambient Temperature" indicator light: when the indicator light is on, it indicates that the ambient temperature is higher than 32°C. E. "Sensor Fault" indicator light: when the indicator light is on, it indicates sensor fault. f.

  • Page 37: Battery Control Requirements

    ULT Energy-saving Series After-sales Service Manual (5) The setting methods of high temperature alarm and low temperature alarm are the same as that of temperature in the freezer. 9.4 Battery control requirements: There is a battery power switch on the equipment, which should be turned on before normal startup. As long as the AC power supply meeting the requirements of the equipment is connected, the equipment will enter into normal working state.

  • Page 38: Control Of Condenser Fan

    ULT Energy-saving Series After-sales Service Manual temperature, and the display temperature is (For DW-86L100J: After unlocking the display board, long press the combination button of "Up" + "Down" for 5s, enter the unlocking password (which is 16 by default and is adjustable within 00~99) of after-sales/factory parameter level, press the "Setting"...

  • Page 39: Adjustment Of Setting Value

    ULT Energy-saving Series After-sales Service Manual as follows: press the "Alarm Cancel" button and "▽" button for 5 seconds when the display board is unlocked, at this time, the display board displays the current voltage deviation, and then uses the "△" and "▽" buttons to calibrate the voltage increase and decrease.

  • Page 40: Door Opening Management

    ULT Energy-saving Series After-sales Service Manual after selecting the current date. After that, the freezer temperature display area displays “4P” stably, press the “Function Selection” button and the freezer temperature display area flashing displays the hour (factory default of 01), press the “△” button or the “▽” button, it circularly displays from 00 to 23, and press the “Function Selection” button to save and confirm after selecting the current hour time.

  • Page 41: Control Of Balance Hole Heating Wire

    ULT Energy-saving Series After-sales Service Manual Press "Up" or "Down" button to modify the setting value of door opening alarm delay;) 9.13 Control of balance hole heating wire When the temperature in the freezer is higher than -35°C, the heating wire at the balance hole dose not heat; when the temperature in the freezer is lower than -35°C (including -35°C), the heating wire at the balance hole is connected for heating.

  • Page 42: Installation And Disassembly Process

    ULT Energy-saving Series After-sales Service Manual A -----------Condenser B -----------Dry filter C -----------One stage compressor D -----------Capillary tube E ----------- Gas-liquid separator F -----------Heat exchanger G ----------- Pressure switch H -----------Oil separator I ----------- Two stage compressor J----------- Evaporator XI. Installation and disassembly process 11.1 Installation location: 11.1.1 Avoid exposure to direct sunlight 11.1.2 The surrounding air is well-ventilated...
  • Page 43 ULT Energy-saving Series After-sales Service Manual product. 11.2.2 Package removal: The packaging of the product is made of wooden pallet, honeycomb corrugated film wrapping and carton box. During handling, the forklift or pallet jack shall be inserted into the bottom for handling. The packaging scheme is shown below.

  • Page 44: Put The Product In Storage Room

    ULT Energy-saving Series After-sales Service Manual 11.3 Put the product in storage room 11.3.1 Difficulty in entering: if the height of the door of the room, which is required by the customer for placing the freezer is lower than the freezer without pallet, and there is no other way, the method of removing the machine compartment front shield and opening the outer door by 180°...
  • Page 45 ULT Energy-saving Series After-sales Service Manual B. Excessive temperature difference between upper and lower parts of the freezer: Because the freezer starts cooling top down, the temperature on the top is lower than that at the bottom, besides, there is also a large temperature difference between the upper and lower parts. The temperature difference of similar products in the world is between 5~8°C, and that of our products is basically not higher than 6°C.

  • Page 46: Troubleshooting Of Common Problems

    ULT Energy-saving Series After-sales Service Manual 12.2 Troubleshooting of common problems Problem Cause analysis Maintenance measures Measure the resistance of the switch or fuse with a 1. Power switch or fuse fault multimeter, if it is confirmed that the switch is broken, replace the fuse or power switch.
  • Page 47 ULT Energy-saving Series After-sales Service Manual temperature in shutdown point according to the customer's requirements, if not, reset the the freezer temperature. Check all welding points of machine compartment, find 2. Refrigerant leakage out leakage points and repair welding. Refill refrigerant. If the display board displays an abnormal code alarm, such as E0/E1/E2/E3, it indicates the fault of temperature 3.
  • Page 48 ULT Energy-saving Series After-sales Service Manual 1. If the top temperature is too high, treat the door seal and 11. The replace the inner door to ensure good sealing performance; temperature in Large temperature difference in the 2. If the bottom temperature is too high, restart the system the freezer is not freezer and add refrigerant R508B for low temperature system (Or...
  • Page 49 ULT Energy-saving Series After-sales Service Manual Treatment method of high temperature alarm: Display temperature of the freezer ≥ setting temperature of high temperature alarm (setting temperature of high No (normal case) temperature alarm ≥ setting temperature of operation + 5°C) Check the LED light and The "Alarm"...
  • Page 50 ULT Energy-saving Series After-sales Service Manual Treatment method of low temperature alarm: Display temperature of the freezer ≤ setting temperature of low temperature alarm (setting temperature of low temperature alarm ≤ setting temperature of operation - 5°C) No (normal case) The "Alarm"...

This manual is also suitable for:

Dw-86l388jDw-86l578jDw-86l626Dw-86l728jDw-86l828jDw-86l490j ... Show all

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