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ULT Energy-saving Series

After-sales Service Manual

Revision record

Revision

number

Revision

date

Reviser

Major revision content

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 refrigerants with the model and
name unchanged.

March 26,

2020

Li Jiangtao

Addition of content for model DW-86L100J.

Содержание DW-86L100J

Страница 1: ...ibited 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 86W420J DW 86W100J 578J 626 728J 828J DW 86L100J Biomedical After sales Service Manual ...

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

Страница 3: ...or 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 refrigerants with the model and name unchanged 02 March 26 2020 Li Jiangtao Addition of content for model DW 86L100J ...

Страница 4: ...ctions 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 ambient temperature sensor condensation temperature sensor and heat exchanger sensor 23 IV Main technical parameters of the product 24 6 1 List of technical parameters 24 6 2 Product nameplate 27 VI...

Страница 5: ...ncel 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 Perspective view and pan view of refrigeration cycle 41 XI Installation and disassembly process 42 11 1 Installation location 42 11 2 Product handling and package removal 42 11 3 Put the product in storage ...

Страница 6: ...face 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 computer the standard interface of DW 86L100J is RS485 interface 1 1 8 With 5 V power supply output function it is convenient for users to use this power supply to directly power wireless network mo...

Страница 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 designed computer controlled low temperature can avoid the cascade system s general wrong control to the compressor of the low temperature stage system 2 4 Humanization design 2 4 1 LED display scree...

Страница 8: ...rms 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 environment which will not make the users fidgety III Product appearance and structure characteristics 3 1 New energy saving structure series DW 86L578J 626 728J 828J 3 2 Narrow series 3 3 Double door series...

Страница 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 Front view Front view ...

Страница 10: ...2 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 High ambient temperature Lock Dirty condenser Function Door opening alarm Overtemperature alarm Low battery Dirty condenser Operating Temperature display area ...

Страница 11: ...ting 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 Take it out directly during replacement Trim of freezer cross beam Electric zinc steel plate liner with color coat Back threading hole Test hole 2 Test hole 1 5V power supply output port Right guard s...

Страница 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 hole which is a four channel structure Inner door handle of model DW 86L626 ...

Страница 13: ...andard 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 Ergonomic handle design saves time and effort in opening and closing the door Lock nose Caster feet Four layer silicone seal for outer door Door opening magnetic control Shelf bar Freezer entrance O...

Страница 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 ...

Страница 15: ...he 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 between the main sensor and computer board Connection between heat exchange sensor and computer board Connection between condenser sensor and computer board Remote alarm wiring Balance hole heating bl...

Страница 16: ...J 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 outlet Relay Atmosphere Micro channel condenser Condenser fan 2 Condenser sensor fault Compressor ...

Страница 17: ...or 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 sensor Condenser sensor fault Ambient temperature sensor Main sensor Thermocouple plate Remote alarm Switch power supply Load board Fan heating wire at the freezer entrance Pressure switch Strong cu...

Страница 18: ...gy 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 Compressor relay ...

Страница 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 High temperature filter Low temperature filter Anti dew tube High temperature condenser Condenser fan Low temperature oil separator Low temperature pressure control valve ...

Страница 20: ...et 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 initial installation or moving of the equipment please rotate the horizontal support legs clockwise to support the ground to ensure that the freezer does not move when it is in use After installation and...

Страница 21: ...ot 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 contact the local after sales service as soon as possible 5 3 9 In case of alarm fault or other faults please follow the prompts on the display board to eliminate the fault If there is no prompt or fail...

Страница 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 7 When the perceived temperature of heat exchanger sensor is greater than or equal to 90 C the alarm displays E4 Note The models are 25 C and 50 C freezer without heat exchanger sensor therefore ther...

Страница 23: ...rm 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 Lithium battery When the battery is connected the battery voltage is less than 9 0 V after charging for 24 hours Alarm light flicker Power failure alarm E30 When the refrigerator is powered off The alarm lig...

Страница 24: ...nical 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 Microcomputer control Display LED display minimum display accuracy of 1 C Temperature sensor PT100 Basic parameters Capacity L 578 728 338 388 Voltage frequency V Hz 220 240 50 220 240 50 220 240 5...

Страница 25: ...Power 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 gross weight kg t 380 410 kg 295 335 kg 301 323 kg Materials External material Electric zinc steel plate coat Internal material Electric zinc steel plate coat Insulation layer VIP fluorine free PU fo...

Страница 26: ...er 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 Accessories Number of clapboards inner doors 0 3 0 1 Clapboard dimensions W D Caster test hole 4 1 Compressor brand and type Enclosed type SECOP 2 Compressor SC21CNX 2 NLE12 6CNL Refrigerant type HC Free H ...

Страница 27: ...gerant 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 LSYJXSCX 20100176 Product registration No and technical requirement No LXZZ 20162580180 Model DW 86L828J Refrigerant High temperature stage R290 150 g Inner temperature 40 C 86 C Low temperature sta...

Страница 28: ...r 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 evaporator of the low temperature stage system and transfers the heat to the refrigerant of the high temperature stage system through the condensing evaporator and then the heat is transferred to the coo...

Страница 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 explosive Refrigerant charging place shall be well ventilated and ignition or sparking is not allowed nearby in case of leakage If there is a problem in the refrigeration system the local after sales ...

Страница 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 valve after one hour of low pressure vacuumization At this time the freezer is required to be kept in negative pressure for more than one hour to check whether the system of the freezer is in a vacu...

Страница 31: ...et 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 weighed with electronic scale when filling If vacuum pumping and refrigerant filling are not carried out in accordance with the above requirements and operation procedures resulting in poor or non refrig...

Страница 32: ...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 ...

Страница 33: ...ensor 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 temperature stage press Low temperature stage press Low temperature pressure switch Condenser fan Condenser fan Capillary tube heating wire Cryogenic capillary tube Heat regenerator Evaporator Heat ex...

Страница 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 and then press the Function Selection button for 5 Main control board Display board Card reading board Compress or Filter Live wire Neu tral line Gro und wire USB board Item connecti on board Switchi...

Страница 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 stop flashing indicating that the value has been entered into the computer otherwise the setting will be invalid When setting low temperature alarm the setting temperature shall not be lower than the mi...

Страница 36: ...y 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 buzzer sound alarm will start again after 30 minutes 9 3 Special function setting Setting of password When the ULT Freezer is used for the first time the unlocking password is 06 After unlocking press...

Страница 37: ...y 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 procedure of charging for 24 hours and detecting for 5 min there is no low battery alarm 4 After the accidental failure of strong current the battery shall supply power to the display screen etc When the b...

Страница 38: ...ether 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 If the start up conditions are met start the high temperature compressor and delay for 10 minutes from the start up of the high temperature compressor if the temperature of the heat exchanger sensor...

Страница 39: ...d 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 temperature of low temperature alarm and temperature test data by U flash disk The computer board can automatically collect and store test data of more than 10 years The data is collected every 6 minutes a...

Страница 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 display area displays the freezer temperature normally In the above setting process of P1 P5 after setting any parameter if other parameters do not need to be adjusted you can directly press the Functio...

Страница 41: ...ocedure 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 case of switching power supply damage due to output short circuit of the isolation transformer winding of the switching power supply and there is no 12 V output the freezer temperature display area ...

Страница 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 Working humidity lower than 80 RH If the maximum working temperature is 32 C the humidity should be lower than 57 RH 11 1 8 Input voltage Within 220 10 Note Because the ULT Freezer is sensitive to the...

Страница 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 remove the fixing connector king bolt B between the two parts of the wooden pallet with adjustable wrenches as shown in Figure B 3 Finally the maintenance personnel push the freezer and pull out the wood...

Страница 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 problems Avoid bumping and scratching during handling During handling the maximum tilt angle should not exceed 45 angle with horizontal direction to avoid refrigeration system fault and affect normal us...

Страница 45: ...ture 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 brands have added the function of slow temperature rise in the design of computer board and temperature sensing probe so the temperature rises slowly when opening the door or the same temperature as that...

Страница 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 starting of high temperature compressor In other cases with normal power on check whether the connection plug of the compressor is normal and observe the surface temperature and the abnormal noise etc ...

Страница 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 sensor is 0 1 V the sensor is short circuited 1 Check whether the terminal of the main sensor is improperly connected or dropped and whether the sensor is damaged 2 Check whether the sensor connector te...

Страница 48: ...art 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 switching power supply damage due to output short circuit of the isolation transformer winding of the switching power supply and there is no 12 V output the freezer temperature display area will imme...

Страница 49: ...temperature 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 No Check whether the compressor is normal or the control circuit is normal No Check whether the fan is normal or the control circuit is normal No Check whether the fan is normal or the control circui...

Страница 50: ...normal 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 Yes Check the buzzer and control circuit of the control board Check whether the high temperature stage compressor and low temperature stage compressor operate normally No Measure the actual temperatu...

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