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Haier DW-86L338J, Service Manual

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Haier DW-86L338J Service Manual Download Page 32

ULT Energy-saving Series

 After-sales Service Manual 

32 

 

DW-86L828J 

150

 

5 

100 

DW-86W100J 

135

 

5 

35 

DW-86W420J 

150

 

/ 

60 

 

 

 

 

DW-86L100J 

R600A of 75 g, R1150 of 15 

g, and R50 of 5 g 

 

 

VIII. System schematic diagram and wiring diagram 

Schematic diagram

：

 

 

Wiring diagram

：

 

High temperature capillary tube 

Cryogenic capillary tube 

Filter 

Intermediate heat exchanger 

Evaporator 

condenser 

Precooling condenser 

Anti-dew tube  

Gas-liquid separator 

Pressure 

switch 

Cryogenic 

compressor 

Filter 

High temperature 

compressor 

Oil 

separator 

Summary of Contents for DW-86L338J

Page 1: ...bited No YL P3 06 ULT DW 8 Energy saving Series 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 8...

Page 2: ...ULT Energy saving Series After sales Service Manual 2 Prepared by Reviewed by Approved by Version 01 Issue date...

Page 3: ...r revision content 01 March 13 2018 Zheng Wendong Addition of content for model DW 86L626 replacement of the original general compressor of DW 86L626 by hydrocarbon compressor Use of hydrocarbon refri...

Page 4: ...tions and product improvement 20 5 1 Unlocking 20 5 2 Temperature setting 20 5 3 Precautions 20 5 4 Fault code query 21 5 5 Probe resistance changes with temperature probe type NTC which is mainly for...

Page 5: ...cel capillary tube heating wire after November 2016 41 9 15 Computer board power failure alarm 41 X Perspective view and pan view of refrigeration cycle 41 10 1 Refrigeration principle 41 10 2 Perspec...

Page 6: ...ace optional it can be connected to the computer display the freezer temperature and alarm message via the computer control the temperature and monitor whether the equipment is normal by operating the...

Page 7: ...and VIP special insulation material has good insulation effect 2 3 3 Independent multi layer sealing structure and heat insulation system design can effectively eliminate frosting 2 3 4 The specially...

Page 8: ...ms 2 6 3 The actual operating temperature in the freezer can be downloaded through USB data storage module 2 7 Noise It is world leading with lower noise and it can keep a comfortable working environm...

Page 9: ...Series After sales Service Manual 9 3 4 Horizontal freezer series DW 86W100J Horizontal freezer series DW 86W420J 3 5 Vertical under table series DW 86L100J Rear view Front view Internal structure Fro...

Page 10: ...Freezer structure High temperature alarm The sensor malfunction Buzzer Low temperature alarm Low battery Lock Network Operating Voltage stabilization Back up system Door opening alarm Power failure H...

Page 11: ...ing hole Outlet air grid Inner door handle Remove the side screw of the handle during replacement Unibody freezer entrance Fixing cover of main sensor in freezer Fixing clip of stainless steel shelf T...

Page 12: ...DW 86L100J Outer door handle Balance hole Foam inner door Inner door seal strip Magnetism switch box for door opening alarm Outer door seal strip Inner door handle of J series Freezer back threading h...

Page 13: ...ndard configuration for storage of 15 year operation data Stainless steel inner door Clapboard Inner door handle USB Door magnet Outer door 70 mm foam layer 25 mm aviation vacuum VIP Outer door handle...

Page 14: ...ULT Energy saving Series After sales Service Manual 14 Main sensor housing Main sensor 5 V cold chain and IoT interface Test hole Hinge Caster and feet...

Page 15: ...e relay that is not on has a fault Temperature adjustment screw Signal cable connection of display board USB signal cable connection Voltage adjustment screw Door opening alarm connection Connection b...

Page 16: ...Ambient temperature sensor connection 232 485 interface connection Switch power supply Battery switch Main switch Remote alarm and 485 interface Master control board Lead acid battery Filter Socket o...

Page 17: ...r light Printer Door switch Backup system board 5 V cold chain Frequency conversion signal cable Networking Electromagne tic lock Battery Electromagne tic lock Display board Balance hole Heat exchange...

Page 18: ...y saving Series After sales Service Manual 18 4 3 2 Installation structure of electric cabinet DW 86W420J Remote alarm and RS485 Main sensor Battery switch Battery Control board Terminal block Compres...

Page 19: ...R232 485 interface Compressor from the back there is high temperature stage system on the left side and low temperature stage system on the right side High temperature gas liquid separator in tube Hig...

Page 20: ...t button to enter the current temperature setting value of freezer is flashing displayed press the Up or Down button to modify the temperature setting value of freezer 5 3 Precautions 5 3 1 After init...

Page 21: ...t be used to freeze a large number of hot items or large volume liquid forcibly and rapidly 5 3 8 If the machine does not refrigerate after 2 3 hours of power on please unplug the power supply and con...

Page 22: ...fault disappears After E3 fault is displayed and when the compressor of the high temperature stage system is started the compressor of the low temperature stage system starts with a delay of 1 minute...

Page 23: ...arm light flicker Long buzzer sound alarm Low battery E22 Lead acid battery When the battery is connected the battery voltage is less than 10 5 V after charging for 24 hours Alarm light flicker Lithiu...

Page 24: ...cal 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 N Control mode...

Page 25: ...ower W 1000 900 950 Current A 10 8 7 5 Internal dimensions W D H 870 716 1310 mm 590 630 1310 mm 760 630 1310 mm External dimensions W D H 1145 980 1980 mm 860 900 1980 mm 1035 900 1980 mm Net weight...

Page 26: ...r VIP fluorine free PU foam layer Door thickness 80 Freezer thickness 140mm Seal structure of outer door Single layer silicone seal strip Seal structure of inner door Door lock Y 1 Y 1 Product Accesso...

Page 27: ...erant type HC Free R600A R1150 R50 6 2 Product nameplate Take DW 86L578J as an example Medical low temperature refrigeration chamber for conservation Medical Device Manufacturing Enterprise License No...

Page 28: ...which is both the evaporator of high temperature stage system and the condenser of low temperature stage system The low temperature refrigerant absorbs the heat of the object to be cooled in the evap...

Page 29: ...of the pressure switch are not adjustable C Parameters Voltage 220 V 50 Hz contact capacity 6A 7 4 Characteristics of refrigerant 1 The refrigerant is a mixed working medium which is inflammable and e...

Page 30: ...the refrigerant pressure is too high the high pressure cannot be sealed when the freezer is refrigerating and continue to vacuumize at low pressure for one hour See Figure 4 4 Close the pressure gauge...

Page 31: ...t is used for filling When filling above refrigerant the steel cylinder can be filled vertically and filled with gas In order to ensure the accuracy of refrigerant filling all refrigerant must be weig...

Page 32: ...and R50 of 5 g VIII System schematic diagram and wiring diagram Schematic diagram Wiring diagram High temperature capillary tube Cryogenic capillary tube Filter Intermediate heat exchanger Evaporator...

Page 33: ...nsor Condenser sensor Remote alarm wiring block Backup system terminal block Computer board Balance hole heating wire Filter Power switch Ground wire Neutral line Live wire Temperature recorder High t...

Page 34: ...board controls the start and stop of the compressor 1 To adjust the setting value unlocking must be carried out first First press or the temperature setting value flashes press or input the number 06...

Page 35: ...At this time press the and buttons can adjust the alarm setting value In case of no operation within 10s after setting it will automatically enter the locked state and the temperature display will sto...

Page 36: ...area accompanied by buzzer alarm The light flashing alarm cannot be canceled until the fault is eliminated while the buzzer sound alarm can be muted for 30 minutes by pressing Buzzer Cancel and the b...

Page 37: ...voltage reaches 12 5 V after that charging is not needed 3 When the strong current is applied detect the battery voltage for 5 min If it meets the requirements of 10 5 V U 11 5 V carry out the proced...

Page 38: ...ther the back up battery switch is on or not the remote alarm function is started 9 8 Control of compressor When it is just powered on delay the delay time set by the user the default time is 1 minute...

Page 39: ...on the computer board which can export the setting temperature in the freezer actual temperature in the freezer ambient temperature voltage seting temperature of high temperature alarm setting temper...

Page 40: ...to adjust press the button to enter the minute time 5P to set After the setting of minute time 5P long press the Function Selection button for 5 seconds to save and exit After that the temperature dis...

Page 41: ...cedure after a delay of 3 min while the freezer temperature display restores the display of the freezer temperature The forced heating procedure is completed 9 15 Computer board power failure alarm In...

Page 42: ...is not more than 32 C The optimal temperature is between 18 C and 25 C and the air conditioning system shall be used if necessary 11 1 6 Height of equipment working position lower than 2000 m 11 1 7 W...

Page 43: ...shown below Removal of wooden pallet 1 Firstly remove the fixing connector A between the machine compartment back and the wooded pallet with a phillips screwdriver as shown in Figure A 2 Secondly remo...

Page 44: ...Open the outer door by 180 After the product enters the door install the machine compartment front shield as it is Note It must be installed in place otherwise it will cause safety and performance pro...

Page 45: ...ure difference between the freezer temperature and the ambient temperature Our freezer s temperature sensing probe is more sensitive so the temperature rises quickly when opening the door 2 Other bran...

Page 46: ...the condition of power on If the voltage is too low or too high the customer is required to provide a voltage regulator 2 Low temperature stage compressor does not start 1 Same as the causes of not st...

Page 47: ...is loosened or poor contacted and whether the display board is damaged 7 E2 alarm When the input voltage of the main sensor is 4 9 V the sensor is open circuited when the input voltage of the main sen...

Page 48: ...rt the system and add refrigerant R508B for low temperature system Or add refrigerant with a needle control valve 12 The display board displays EEE Power transformer fault of control board In case of...

Page 49: ...emperature stage compressor and low temperature stage compressor are normal Yes No Yes Yes Check whether the power supply is normal No Check whether the fan is normal or the control circuit is normal...

Page 50: ...ormal case Sound alarm after 15 minutes of light flashing alarm Yes No Yes The Alarm light flashes the Low temperature alarm light flashes Check the LED light and control circuit of the display board...

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