service manual for ULT
Contents
1. 0074091318 0074091225 0074090884 0070204295 0070204827 duplex all round caster Display board Condenser temperature sensor Ambient sensor Cover for access port Inner door handle Defrost shovel Outer gasket for inner door 0270800385 Interior door assembly Inner gasket for inner door 0270800385 Interior door assembly 0070401235 Battery power switch 0070106373 Inner door hinge 19 0070107087 Outer door hinge 2 0070107112 Outer door handle Rechargeable battery of 21 0074091430A 12VDC N O N 26 N N N N N N UT N 0074090857 0074090857 0074091167 Oil separator Cabinet temperature control sensor PT100 Air cooled condenser Door switch for backup system control AC contactor 220V 60Hz Fan for low stage 220V 60Hz Fan for high stage 220V 60Hz 17 amp 22 amp 25 amp 28 compressor 220V 50Hz danfoss 0024000070 0070815591 0074090752 Power relay for compressor 220V 60Hz Catch assembly for latch mechanism Circuit breaker Testing Date Cooling Rate Ambient temp ca cC y 100 200 300 400 500 600 FOO 800 200 1000 1100 1200 1300 1400 10 20 il Mp o 30 c 3 40 50 60 The third floor center temperature 50 30 100 Coin Cooling Rate Model Power supply Ambient temp Cooling time from ambient temp2. excluding 38 C too high ambient temperature indicating lamp in the alarm display area will light and send alarm accompanied with buzzer alarm Light flashing alarm can t be cancelled until the fault is removed While the buzzer audible alarm can be silent when press buzzing cancel with mute period of 30 minutes 30 minutes later the buzzer audible alarm will be started again 39 88 Setting of special functions When the low temperature refrigerator is firstly used unlock password is 06 After unlocking press Function Selection and Buzzer Cancel for 5 seconds simultaneously 06 will be displayed on the display then press A and V to adjust the password values Password value can be chosen among 05 06 07 29 30 No operation will be done within 5 seconds after the password value is set then it will enter the lock status automatically indicating the password value set is valid When unlock the password value the display figures be displayed among 01 02 03 98 99 Under the unlock status press and hold down Function Selection and for 5 seconds at the same time Start delay of high temperature compressor is 01 1 minute when the display indicates that the equipment is energized then the start delay can be set as 01 02 03 09 10 1 minute 10 minutes by pressing A or V The default delay is 1 minute Under the unlock status press
3. of freezing MEU eet EE 58 eeRefrigerant perfusion Details enne nnne nnn r nnne rasis 60 eeTroublesShoolllg ossa rri a uc 61 e eHow to deal with High temperature 65 e eHow to deal with Low temperature alarm 66 eePoints needing attention during normal use of the product 67 1 Points needing attention during normal use proper 67 2 Points needing attention during normal use safety requirement 69 Points needing attention during normal use disposal of special circumstances 13 e OIherialinenapnecesndrepalru y ou u er 15 telen SOFC DON ree yasta 75 2 Clean condenser filter screen 75 3 Clean Tiller screen Wit E een dete 75 ABT ie Mel Wallis ds hoe 76 Batey Mantenan E 76 Oe O M 78 1 Common Faults Analysis and Maintenance 78 2 Alarm of battery low electric ss 19 SEA Er De ellene e E 80 eeUsed Spare Parts Photo Gallen 81 WO CSE RE 86 4 88 Designation Regulations for type naming Design No is expressed with pinyin character Sequence Rated volume
4. sensor open lt 0 1V the short circuit Heat exchanger sensor input voltage gt 4 9V the sensor open lt 0 1V the short circuit Condenser probe perception of condenser temperature minus the difference in ambient temperature 2 I3 for five minutes alarm occurred lt 10 5V battery power battery low alarm 1 Check the ambient temperature sensor terminal plug bad or falling sensor for damage 2 Check the display board sensor connector terminals are loose or poor contact whether the display panel damage 1 Check the ambient temperature sensor terminal plug bad or falling sensor for damage 2 Check the display board sensor connector terminals are loose or poor contact whether the display panel damage 1 Check the main sensor terminal plug bad or falling sensor for damage 2 Check the main control board sensor plug terminal is loose or poor contact master plate for damage 1 Check the heat exchanger sensor terminal plug bad or falling sensor for damage 2 Check the main control board sensor plug terminal is loose or poor contact whether the display panel damage 3 Replacement spare sensor long press to beep cancel after 5 seconds alarm will disappear when the alarm The temperature stage one minute after the start of the Low Temperature startup 1 Open the front grille and clean the filter 2 Check whether the condenser probe away from the con
5. eight hours and then transferred to 80 degrees observed freezer there are normally open to stop more than 24 hours Prove freezer performance is normal 3 Press operation after 2 confirm the freezer normal freezers memory to place items 60 C items should be stored in principle does not exceed 1 3 of tank capacity Items stored in the temperature is higher than 60 C freezer temperature should be set higher than the storage temperature 3 C i e if the articles temperature is 20 C then the cryogenic cabinet set at a temperature of 23 C ensure the shutdown of the freezer and a normally open stop more than eight hours 4 prohibits are all temperature freezer cold storage equipment storage of low temperature materials can not be used to the higher temperature of quick frozen plasma products non disposable put too many relatively too hot items this will cause the compressor stop time machine the temperature does not drop it is easy to burn the compressor resulting in damage to the machine box items Items must be in batches into the points ladder temperature cooling low temperature until needed 5 If the user needs way to in a short time the frozen equipment forming plasma products now we specifically developed a frozen machine to meet user demand for frozen plasma 3 Pressure switch and infusion of freezing medium Principle when pipeline pressure at pressure switch exceeds 2 1MPa contact disconnects l
6. Temperature pressure control Low temperature filter valve 20 88 Cooling unit parts parameter Part decripetion Models High temperature stage Low temperature stage Escop Danfoss GS26CLX power 220 240V 50Hz DW 86L628 728 828 Start capacitance 117U5381 100uF 117 7135 20uF Danfoss GS26CLX 208 230V 60Hz DW 86L628 728 828 11705381 100uF 117 7138 20uF DW 86L486 388 288 490 338 coe Ch 220 240V 50Hz 388A Start capacitance 11705373 80uF DW 86W420 117 7112 10uF Escop Danfoss SC18CLX 2 DW 86L628 486 11705043 410uF 117 7114 23 50 DW 86L486 338 490 117U5373 80uF 117 7121 10uF Escop Danfoss SC12CL m 208 230V 60Hz 11705017 80uF Haier HY DLB PCB 220V 120V 12V7AH 12V4AH Escop Danfoss SC18CLX 2 208 230V 60Hz 21 88 Refrigeration circuits Diagram of refrigerating system Dry filter Capillary tube Dry filter Evaporator e Capillary tube s ll Gas liquid o SI 5 e V ml T_T 2 E lt Condenser i High temperature Low temperature I QO Pressure control compressor Valve mmm Heat exchanger compressor Se Oil separator 22 88 E wm Circuit diagram Mother board 9 20 CET qu di L lz Le NON dx EM TEE EE e
7. The maximum inclination angle shall not 45 when handling the included angle with the horizontal direction so as not to produce the fault to refrigerating system or influence its normal use 3 Product installation and matters needing attention 3 1 Installation site of the product avoid the direct sunshine good ventilation around the site avoid a collection of dust avoid the mechanical swing or vibration Ambient temperature 5 C 28 C the maximum temperature shall not exceed 32 and the optimal temperature will be 18 C 25 C If necessary the air conditioning system will be used 32 88 Height of the working position of the equipment less than 2000 DOperating humidity less than80 RH If the maximum operating temperature is 32 C the humidity shall be less than 57 RH Input voltage Within 220 10 Notes Because the ultralow equipment is sensitive to the ambient temperature if the machine can t operate normally if it is installed in the environment other than the above ones then it can be applied again after the environment is improved 3 2 Matters needing attention of the product At least a 20cm clearance shall be reserved between the wall and the back of equipment Ground of the installation site must be level whose ambient temperature shall not exceed 30 C The equipment shall be applied under an environment of 25 C If the temperature is too high then the air conditioner is required for soluti
8. for a period of time to melt frost 5 Use a dry cloth to wipe off the water on refrigerator bottom 6 After finishing cleaning refrigerator body and inner door restart the equipment 7 Put the objects back into already fully cooled refrigerator body 8 If there is an aided cooling device turn on the device When low temperature storage box is continuously working please check the electricity quantity of battery When you find the electricity quantity of battery is low please ensure that battery switch is ON at this time the battery is recharged When the battery has been recharged continuously for a week please test the electricity quantity of battery again under normal condition at this time the electricity quantity of battery should be full If the condition of insufficient electricity quantity of battery still appears please replace the rechargeable battery Power off alarm battery is a consumable The life service of battery is about 3 years If battery is used more than 3 years it may not fail to act at the time of alarming and the setting of 76 88 storage may be affected It is suggested that the battery shall be replaced as soon as possible If you need to replace battery please contact Haier after sale service personnel Warning To avoid electric shock or personal injury before equipment maintenance or repair the power must be cut off When maintaining the equipment make sure not to breathe in drugs or
9. it is too thick freezing effect of the storage box will be influenced to increase the power consumption Therefore when the frost layer reaches 5mm thick it shall be removed with the shovel attached at intervals ePrior to defrosting please take out the articles from the box and put them into another one for freezing to avoid damaging the articles due to temperature rise inside the storage box eThere are many cooling coils on the back of inner wall and the side don t remove the frost on inner wall with knife ice chisel or screwdriver During defrosting the inner wall shall not be scratched otherwise it will produce the equipment fault e When the storage box hasn t been used for a long time the power shall be shut off and the battery switch shall be switched off at the same time 68 88 2 Points needing attention during normal use safety requirement Please apply the special power AC220V 50Hz marked on the equipment nameplate If the voltage applied is less than 198V or higher than 242V the automatic stabilizer exceeding 4000W shall be provided If the power wire needs to be lengthened section and length of the lengthened part shall not be less than 2mm2 and greater than 3m respectively Application of the power with other voltage or frequency which isn t marked on the nameplate will possibly cause fire or electric shock 0 Power wire of the storage box is equipped with 3 wire earthing plug meeting 16A standard 3 wir
10. of DW 86L388 series of ultra low temperature cabinet products has very strict requirement for the infusion quantity accuracy gram of freezing medium maintenance shops must prepare a standard electronic scale within the error of 3 grams before maintenance as the freezing medium of ultra low temperature machine is made up of concentrated freezing medium mixtures the infusion quantity marked on the back of machine is only used for reference it is not actual infusion quantity before infusing freezing medium maintenance personnel must contact the Head Office which will provide maintenance guidance 59 88 Refrigerant perfusion Details High temperature stage Low temperature stage Type The refrigerant type The refrigerant type amount 2 amount Improved date R134A g R404A g R508B g R290 g R23 g DW 86W420 ae DW 86L288 286 reele ae mf eee omm wm m m meme om om pm o p DW 86W420 420 140 2012 4 1 old type DW 86L288 385 135 2011 1 10 old type DW 86L386 525 162 2010 11 24 old type DW 86L388 525 2011 1 12 old type DW 86L626 628 420 2010 12 25 old type Note refrigerant type and weight of the nameplate subject shall not be mixed or misuse of refrigerant 60 88 Troubleshooting 1 MentmaneMesues 1 User s fuse burns out Change the fuse 2 Machine storehouse wiring co
11. prohibiting the opening of the system should immediately open system machine pipe welding completed 3 because of the machine on the water in the system is very strict so the machine pipe openings should immediately tape each pipe junction sealed to prevent air from entering the system and requires the completion of 20 minutes each opening pipeline welding 1 the middle of the vacuum pump connector with a pressure gauge common connector as shown in Figure 2 2 Turn on the vacuum pump vacuum degree lt taking the time to time refer to the attached Note See Figure 3 3 When the requirements of the degree of vacuum is reached the first stop 53 88 high pressure the time and quickly high temperature perfusion tube welding sealing machine refrigeration high pressure refrigerant pressure is too high can not seal the mouth low pressure continues to find time to one hour See Figure 4 4 low pressure for taking the time to one hour after the close the pressure gauge valve pressure gauge is then maintained at a negative pressure for one hour or more to check the machine system is in a vacuum state observed in this period requires that the machine picked up the case otherwise re taking the time to more than one hour and then continue to remain in the negative pressure state for more than one hour so evacuated operation until such time as the pressure does not rise so far before reperfusion Note 1 Using 4 liters or more
12. set temperature high temperature alarm set temperature gt run set temperature 5 Check the display board LED lights and control circuit Low temperature alarm Lights flashing Check the control panel buzzer and control circuits After 15 minutes flashing alarm sound alarm Check the compressor and control circuit Low temperature stage compressor is normal Adjust the temperature deviation Measuring the actual temperature of the refrigerator Low temperature stage fan is normal Check the fan and the control circuit Check whether there is a refrigerant leakage repair leakage 66 88 1 Points needing to pay attention Points needing attention during normal use proper use eWhen the refrigerator is firstly used or the storage box hasn t been used for a long time the alarm Low battery will appear because the charged battery has been completely discharged But it doesn t mean that there is a fault In this case the empty battery will be charged adequately to make the storage box to continuously run for about 6 days eWhen the storage box runs areas around the door frame of the outside case of the refrigerator body will be heated and it isn t a fault This is because a dew removable tube is installed around the refrigerator door in order to avoid the condensation around the refrigerator body eBefore the articles are put into the storage box firstly the tem
13. suspended particulates around the equipment which may be harmful to your health 77 88 DQuestion Displayed temperature is not the same as actual test temperature Answer As the displayed temperature is the temperature at one point in refrigerator while a user is testing the temperature of another point in refrigerator as position is different temperature must be different meanwhile the user s testing tool may have certain measurement error with our temperature detector Q Question The temperature difference between upper part and lower part in refrigerator is too large Answer As our machines start refrigerating from up to down the upper part temperature is lower than lower part meanwhile the temperature difference is large The temperature difference of like products in the world 15 578 basically our temperature difference is maintained around the temperature In addition if a user open and close refrigerator doors frequently big temperature difference between upper part and lower part may appear 3 Question What is voltage increase start Answer To ensure the normal operation of machine our machines have the functions of increasing and decreasing voltage When a user s voltage is lower than 183 V the machine is unable to start at that time the user needs to check if his line is normal or not Question A user has set 86 C why it rises up to 82 2 Answer To ensure the service li
14. to 80 C min DW DW861288 220 220240V 50H 220 240V 50Hz 3 DW 86L486 208 230V 60Hz lt 420 220 240V 50Hz DW 86L628 208 230V 60Hz 220 240V 50Hz 208 230V 60H Z 25 3 220 240V 50Hz DW 86L828 208 230V 60Hz 220 240V 50Hz DW 86L338 208 230V Se E DW 86W100 lt 115V60Hz 220 240V 50Hz 11 DW 86W490 208 230V 60Hz Temperature of the cooling system parts zoo Y 200 300 400 500 600 700 800 200 1000 10 jJ 20 H out is N gp m gt E out 40 4 o 0 j Amb temp Temperature of the parts model Ambient Cooling system temperature ower supply En DW 86L288 220 220 240V 50Hz DW 86L388 220 240V 50Hz 220 240V 50Hz 3 DW 86L486 208 230V 60Hz 115V60Hz 220 240V 50Hz DW 86L628 208 230V 60Hz 115V60Hz 220 240V 50Hz DW 86L728 208 230V 60Hz 25C 3 lt 32C 220 240V 50Hz 32C 32C 86 C 85 C DW 86L828 208 230V 60Hz 220 240V 50Hz DW 861338 208 230V 60Hz Se DW 86L388A 220 240V 50Hz 220 240V 50Hz DW 86W100 115V60Hz DW 86W420 220 240V 50Hz 220 240V 50Hz DW 86W490 208 230V 60Hz Haier Inspired living Haier Medical amp Laboratory Products Co Ltd Room 403D Brand Building Haier Industrial Park No 1 Haier Road Qingdao China Website www haiermedical com
15. two level refrigeration which is divided into two independent systems of high temperature level and low temperature level at the time of maintenance the two systems shall not be opened at the same time you must distinguish which system is failure then open that system The humidity in maintenance shop shall not be too large if it is cloudy or rainy don t open 48 88 the systems For the machine that its system has already been opened the pipe welding shall be finished at once As the machines have strict requirement for system moisture content so when a machines pipe is opened the opening of pipe shall be sealed with tape at once to prevent air from entering in system and pipe welding of opening shall be finished within 20 minutes As the system of DW 86L386 series of ultra low temperature cabinet products has very strict requirement for vacuum degree the system will occur bad refrigeration or non refrigeration due to insufficient vacuum Therefore it is required that maintenance shop shall spend more time in vacuumizing this series of products than normal refrigerators vacuum pump above two liters needs more than 6 hours vacuum pump below two liters needs more than 8 hours To ensure vacuum degree when one system is being repaired it is required that two vacuum pumps high and low pressure shall vacuumize separately at the same time pressure gage and gage valve shall be installed on high and low pressure infusion t
16. 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 86 C can be expressed as 86 Low temperature cabinet Low temperature cabinet 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 86L628 means that the Ultra low temperature storage refrigerator with the temperature at characteristic temperature 86 horizontal and rated effective volume 6281 5 88 Introduction to product features 1 1 Temperature inside the ultralow temperature cabinet 10 86 C adjustable temperature set arrange 407 86 1 2 Balanced pressure design inside and outside the cabinet the door is easily opened and closed 1 3 Temperature inside the cabinet high and low temperature setting ambient temperature and input voltage can be displayed on the display screen High and low temperature alarm and temperature inside the cabinet can be set 1 4 Temperature inside the cabinet high and low temperature setting ambient temperature and input voltage can be displayed on the display screen 1 5 Various fault alarms hi
17. work normally low Sometimes more than 20 sometimes below zero Master sensor fault E2 condenser sensor Check if sensor contact is bad or 11 Display EO or other signs fault E1 ambient temperature sensor fault EO not otherwise change the sensor 12 The start of high temperature level compressor is normal but Maintenance high temperature level Low temperature level High temperature level refrigerant leaks df compressor compressor protection is not normal does not start and fails to refrigerate Low temperature level refrigerant leaks Infuse refrigerant 13 Temperature can only be maintained at about 50 for a After shutdown open the cover to long time and temperature balance inside and outside neither rises nor falls and the temperature then start up again Refrigeration pipe line is blocked machine is operatin d Infuse refrigerant again and change the filter 14 It displays that voltage is Displayed voltage is the voltage at the user s I high or low socket it is normal 63 88 normally 1 E0 alarm 2 1 2 4 E3 alarm 5 The condenser dirty alarm 6 Battery alarm low Ring temperature sensor input voltage gt 4 9V the sensor open lt 0 1V the short circuit When the condenser sensor input voltage gt 4 9V the sensor open lt 0 1V the short circuit Main sensor input voltage gt 4 9V the
18. 980 1145 900 1310 870 630 L728 DW 86 GS26CL 828L 220V50Hz 1200W 1980 1145 980 1310 870 710 L828 DW 86 338L 220V50Hz 900W 1866 812 893 1165 465 630 SC21CL L338 DW 86 490L 220V50Hz 1100W 1980 860 900 1310 590 630 SC21CL 490 DW 86 486L 220V50Hz 1000W 1980 945 900 1310 590 630 SC21CL L486 N NA OO LA NA NA 28 88 product nameplate For example DW 86L338 qa le f Ultra Low Temperature ULT Freezer Model DW 86L338 Rate Voltage 220 240V 50Hz Effective Volume 338L Climate Class Refrigerant towstags low stage 290 20 R508b 200g Haier Medical and Laboratory Products Co Ltd Haier Industrial Park Economic Technology Development Zone Qingdao 266510 P R China 29 88 Transportation and Installation Transportation of the product and removal of package 1 1 Transportation the product is heavy so fork or hydraulic jack will be used during transportation to avoid damaging the personnel and product 1 2 Removal of package packing method of the product wooden support EPE During transportation the fork or hydraulic jack is required to insert into the bottom of the wooden support to transport the product Packing scheme is shown as the following figure Notes Removal of packing refers to Single Page for Removal sticked to the inside of packing carton Pleas
19. Haier Service Manual FILE No HMRSM 001 01 Ultra low Temperature Refrigerator DW 86L288 DW 86L 338 DW 86L388 DW 86L388A DW 86L486 DW 86L628 DW 86L 728 DW 86L 828 DW 86W100 DW 86W420 Haier Medical amp Laboratory Products Co Ltd Effective models This service manual is effective for following models Model name Product code Voltage V Frequency Hz Plug type 2 88 se DESIA lOM an 5 ee Introduction to product features u u uuu unai tasu ni assays aswa S 6 El Te 7 sean 14 The DIS AY SIUC UUM E DOTEM 14 2 DOX DE 14 Oel ili gol glee Bel CN 17 4 System architecte EE 20 Ell lef amp 21 OFX EE 22 ew Ci ele E EE 23 seConn ctions on EE 25 be RL Le el Ce EE 26 1 The value of the probe resistance varies with temperature probe type NTC 26 2 The value of the probe resistance varies with temperature probe type 100 27 eeDetailed technical data of the product 28 _ CE VAIS vede ene 29 eeTransportation and Min EE Le Dior eee eerdere E EE votre EPOR DOVER ERR 30 1 Transportation of the product and removal of package 30 2 The product enters t
20. L288 DW 86L338 388A 8 88 DW 86L490 DW 86W100 9 88 DW 86W420 10 88 Dimensions DW 86W100 11 88 DW 86L490 S00 12 88 Other Modles L I IEN lI ____ Mim Spar 3 3 naas 1310 630 96 590 1960 1960 500 945 900 3 isi 636 296 T60 1960 i980 160 1035 900 Imaan 1310 636 2 6 1960 1980 ero 1145 900 13 88 Parts layout Low temp Buzzer cancel alarm High temp alarm Sensor failure High ambient temperature ambient temperatur Main doors PU foam structure VIP Outer door middle seals Main door handle Shelf replace the shelf around 45 The inner door Inner door middle outer seal Chart recorder Inlet grille seal Inner door PU foam structure 14 88 Main senser The fixed cover of the main sensor in the box Stainless steel Inner color Cream yellow shelving fixed clamp Material electro galvanized steel sheet Box beams decorated bar Inner door handle replace dismantled handle the center of rotation of the screw Cabinet mouth 15 88 Test hole CO2 backup system Senser hole Cabin guard plate Nameplate
21. alarm may occur When a user just starts a machine as the temperature inside refrigerator is high cooling load is large heat release is also large at this time condenser temperature is too high the signal sent by sensor to computer panel thinks that the condenser is dirty so alarm occurs after the machine has operated for a period of time the alarm will disappear automatically Deposal method communicate with users and explain the cause of alarm and machine features Second ambient temperature is too high so the condensing temperature of machine is correspondingly too high and exceeds 38 C at this time the machine will also occur the phenomenon of dirty condenser alarm Deposal method reduce the machine 5 ambient temperature Third the machine has been used for a long time or user environment is quite dirty there is too much dirt on condenser filter screen the heat dissipation of condenser is poor at this time the machine will sound the dirty condenser alarm Deposal method clean off the dirt on condenser filter screen 80 88 0070701061 0070700606 0070701865 0270200538 0270200322 0074091319 Used Spare Parts Photo Gallery DW 86L628 Spares Name qty picture Filter dryer pressure control switch for 2nd stage Suction accumulator Outer gasket for outer door Inner gasket for outer door control board 1 Whether wearing 10 11 12 1 0070101872
22. ance The equipment can t be started eCheck the power is normally connected or the mains switch is switched on or not els the voltage is too low els there too much articles stored in the storage box one time Bad cooling els the ambient temperature too high eThe inside and the outside door are opened tightly Frost between the box body and the door seal will damage the sealing of door els the filter net of the condenser blocked by dirt els the temperature setting is correct els the storage box far away the direct sunshine els the storage box close to heat source eAre the rubber cover and heat insulating material used by the testing through hole placed correctly els there too much unfrozen articles placed in the storage box within several hours Under this case it is a temporary problem The setting temperature can be adjusted to high making the storage box normally start and shutdown within a short time so as to reduce the setting temperature gradually els the storage box installed on the solid ground eDoes the casing of storage box touch any object els the storage box supported with horizontal supports els the storage box in low temperature running status eThere is noise with the storage box when it is in high temperature due to too much load This noise will become smaller and smaller with temperature reduction of the storage room ePlease check whether the noise is from the compressor noise of the ultralow e
23. and hold down Function Selection for 5 seconds Temperature calibration value will be displayed on screen display area at this time the difference between display temperature and that at the special point inside the refrigerator will be calibrated For example display temperature is 80 C and temperature at a special point is 75 C then 5 C can be input to change the display temperature into 75 therefore the calibration range is 5 When the compressor is turned on the two fans also will be turned on when the two compressors are turned off the two fans will depend on the following conditions for on or off when the ambient temperature is higher than 20 C the two fans will be turned on when it is lower than 20 C except for 20 one fan will be turned off and the other will be turned off when the ambient temperature is lower than 12 except for 12 the 40 88 two fans will be turned off There is a battery power switch on the equipment which will be turned on before normal start The equipment will enter normal operating status only it is connected to AC power satisfying the equipment requirement When AC power can provide the normal power supply the equipment can charge the battery as required When AC power is interrupted due to accident the battery can supply the display screen to realize normal display When the battery discharge is less than or equals 10 5V then the battery will stop supplying the display s
24. and serial number The cabin left guard 16 88 Remote Electrical control box alarm R232 485 serial NES wiring port module e F i Main control board Low temperature pressurized AC contactor Battery e Switch The high temperature Buck AC contactor s E Ew Switch Transformer Wiring board Relay Condenser Condenser Fan Battery 17 88 High temperature Condensation compressor fan Pressure decrease Induced draft fan Pressure increase temperature compressor 18 88 N gt N Voltage Network Display Temperature Master sensor adjustment connection panel regulation Screw connection screw NX ET Mother Board Heat exchanger sensor EES S gt m m mm w mmm asam Condenser sensor J Computer panel test key under the condition of power ON press down the test key and see if all relay lamps are lighting in continuous cycle otherwise check if the relays that are not lighting have failure HN Ambient temperature sensor emm CELL CR LCE Compressor look from the back Anti dew tube The left High temperature stage The right Low Temperature stage High temperature condenser Condenser fan High stage gas liquid separator Oil separator High temperature filter Low
25. at the values have been input to the computer otherwise they are invalid Temperature setting range will be 10 86 35 88 When set High Temperature Alarm if temperature set display area flashes it indicates the temperature setting value at this time press shifting and adjusting key to adjust the alarm setting value If no operation is done within 10 seconds after adjustment then it will enter locking status automatically If temperature display flashing stops it indicates that the values have been input to the computer otherwise they are invalid The temperature set shall not exceed the maximum limit temperature or be less than the setting temperature by 5 C when setting the high temperature When setting Low Temperature Alarm if setting temperature display area flashes it indicates that the temperature setting values At this time press A and V to adjust the alarm setting value If no operation is done within 10 seconds after adjustment then it will enter locking status automatically If temperature display flashing stops it indicates that the values have been input to the computer otherwise they are invalid The temperature set shall not exceed the maximum limit temperature or be less than the setting temperature by 5 C when setting the high temperature otherwise the setting can t be realized 36 88 Indicating of working status of display panel 1 The refrigerator will enter starting s
26. creen without any display If the power will be completely disconnected when the battery can provide the normal power it only needs to pull out AC power wire and shut off the battery on equipment and nothing will be displayed on the display screen When there is any trouble with the sensor Sensor Fault indicating lamp lights When the main sensor has any trouble actual temperature will be alternatively displayed on the display screen and the code is E2 2 When the condenser has any trouble actual temperature will be alternatively displayed on the display screen and the code is E1 3When the ambient temperature sensor has any trouble actual temperature will be alternatively displayed on the display screen and the code is EO When the heat exchange sensor has any trouble actual temperature will be alternatively displayed on the display screen and the code is E3 when temperature of the heat exchanger picked up by the sensor290 C the alarm displays E4 O During alarm testing when the battery switch isn t connected or the battery is low 41 88 display fault on the display screen is Alternate display time the actual temperature display is 6 seconds and fault code display is 2 seconds since Nov 2009 7 1 After initial installation or moving equipment clockwise rotation of the horizontal leg horizontal feet support the ground to ensure that the freezer does not move when you use need to sta
27. d once a month When condenser is dirty alarm lamp on storage box display panel is flashing filter screen needs to be cleaned Even the lamp is not flashing filter screen shall be cleaned once a month If filter screen is blocked the service life of compressor will be shortened temperature reduction will also be slowed down please clean filter screen according to following steps Pull machine storage front shield out Take out filter screen Put filter screen back to original place and install machine storage front shield If condenser is dirty alarm lamp is flashing before the cleaning of filter screen please check if the lamp is OFF after the cleaning 75 88 Generally frost occurs on the upper part of refrigerator body and inner door Frost may cause gap between refrigerator body and door sealing strip which may cause bad refrigerating effect Defrost on inner door with a defrosting shovel which is provided together with the equipment Empty refrigerator body and then defrost according to the following method Note Don t defrost with the tools that have sharp edge and corner for example a knife or a screw driver 1 Take out objects in refrigerator and put them into another storage box or a container with freezing liquid state carbon dioxide 2 If there is an aided cooling device turn off the device 3 Turn off the power 4 Open outer door and inner door let refrigerator outer door naturally open
28. denser outlet too close 3 The condenser probe take Changuo processing tape 1 Investigation and whether the battery have expired 2 the troubleshoot battery switch on terminal block whether the patch well or switch is damaged 3 Investigation and charging circuit is normal strong power after five minutes on the refrigerator the test master board battery terminal voltage output the output voltage should be lt 5V 64 88 How to deal with High temperature alarm Refrigerator temperature gt high temperature alarm set temperature high temperature alarm set temperature gt run set temperature 5 C Check the display board LED High temperature alarm Lights flashing lights and control circuit After 15 minutes flashing Check the control panel alarm sound alarm buzzer and control circuits Test Input voltage display is Check the power is normal normal Low temperature stage Check the compressor and compressor is normal control circuit Check the fan and the control circuit Low temperature stage fan is normal Check the fan and the control circuit High temperature stage fan is normal High temperature stage compressor is normal Check the compressor and control circuit Check whether there is a refrigerant leakage repair leakage 65 88 How to deal with Low temperature alarm Refrigerator temperature gt high temperature alarm
29. e earthing socket Under no circumstances earthing pins of the power wire shall not be cut off or removed Plug and socket of the power wire must be guaranteed to be connected securely otherwise it will produce fire d The power socket with earth wire shall be used to avoid electric shock If the power socket isn t earthed then the earth wire shall be installed by the qualified engineering technician The equipment shall be earthed via gas pipe water supply pipe telephone line arrestor Because the above earthing will produce electric shock or other dangers S This equipment shall not be used in open air When the storage box suffers rain the accidents such as current leakage or electric shock will possibly produced d The equipment only can be installed by the qualified technician or maintenance personnel Otherwise electric shock or fire will be caused d The equipment must be placed on the solid ground If the ground is unstable or placement location is improper the equipment will turnover or be damaged The equipment shall not be placed at the moist place or easily suffering from sprayed water Otherwise the accidents such as current leakage or electric shock will be caused due to reduction of insulation degree S The inflammable and explosive dangerous articles or the volatile articles shall not be stored in the equipment or the inflammable spray shall not be used nearby it otherwise it will cau
30. e note that the connecting pieces front and rear must be removed before the wooden support is taken out 30 88 Z Sa e 7 Vij 2 VID TEN Figure 1 Connecting pieces of the wooden base Figure 2 Fastening pieces of low temperature cabinet 2 The product enters the placement room 2 1 It is difficult to enter the door if the product can t enter the room height required by the client and its access is unavailable without the bottom base the front cover of the cabinet can be removed and open the door to 180 degree Removal of the front cap of cabinet and the notes for attention are shown as Notes In general we don t recommend removing the front cap of cabinet 2 2 Remove two screws below the front cap of cabinet 2 Remove the front cap 31 88 Remove two screws of front cap of cabinet remove the front cap of cabinet Open the outside door to 180 degree After the product enters the room install the front cap of cabinet as original Notes The installation must be in position otherwise the safety or performance problem will be caused Notes During the transportation the storage box shall be avoided being impacted or scratched
31. edium from being absorbed into compressor This is an integrated high temperature system refrigerating cycle After freezing medium is compressed by second level compressor freezing medium firstly receives pre cooling of precooler After passing through oil separator and dryer it condensates on heat exchange coil Condensed freezing medium passes through filter and capillary tube then forms low temperature and low pressure liquid and evaporates in evaporator in this way refrigerator body temperature is cooled to 86 to 90 C To put it simply first level compressor operates first level heat exchange coil cools second level compressor operates second level refrigerating system condenses in first level heat exchanger coil second level system reduces the temperature of refrigerator body lower than 86 or 90 2 Ultra low temperature cabinet use After the first use of ultra low temperature cabinets or ultra low temperature cabinet by handling or ultra low temperature cabinet power including power failure more than 10 46 88 hours prior to use or powered up again before use inspection machine Qualified to confirm the testing machine The use of the cryogenic cabinet 1 Must stand for the freezer for at least 24 hours to energize 2 empty containers not put items power on in stages so that the freezer before cooling to 40 C the normal open stop and then dropped to 60 degrees normally open to stop
32. eeze the high temperature blood plasma It is forbidden to store so many relatively hot articles the equipment The articles must be placed into the refrigerator in batches and cooled by stage temperature until reach the low temperature required If the client needs a freezing equipment to freeze the blood plasma within a short time presently we specially develop a kind of urgent refrigerator which can meet the client s need in blood freezing 34 88 Specifications of LCD panel ULTRA LOW TEMPERATURE FREEZER Volage Vj Aniani Temp CC For adjusting the setting values firstly they must be unlocked Press temperature setting values will flash press and input the number 06 then hold Function Selection for 5 seconds Lock lamp goes out to enter unlock status After that the settings as follows can be done press Function Selection to repeatedly choose temperature set high temperature alarm set and low temperature alarm set inside the refrigerator and the corresponding indicating lamps will be lighten DIL OT X x For Temperature Set the display area will flash to display the temperature setting value At this time press and V to change the setting values If no operation is done within 10 seconds after adjustment then it will enter locking status automatically If temperature display flashing stops it shows th
33. elay start 1 minute 44 88 er we The heat exchanger Wu LR wr sensor probes foam 4 box inside of the 4 2 bottom Heat exchanger sensor terminal When heat exchanger sensor senses the temperature gt 90 alarm display E4 Remarks Model 25 Cand 50 C heat exchanger sensor so E4 fault Model independent backup system no EO E1 E4 fault Alternately display time the actual temperature display 6 seconds the fault code is displayed for 2 seconds 45 88 Product use and maintenance 1 Principle of work The design of overlaying type freezing medium system is used for freezing mediums with different boiling points this system needs two independent cooling systems It is shown as above each system can work synchronously first level system is used for the high temperature section of second level cooling Second level is the main system which is used to maintain the temperature in low temperature cabinet Freezing medium is compressed by first level compressor and condensed by condenser and then dried by dryer After passing through capillary tube dried freezing medium becomes evaporated gas low temperature and low pressure Heat exchanger is cooled to below 20 C which is used for carrying out condensation on second level system gas Filter eliminates impurities in freezing medium freezing medium goes through liquid separator which can prevent liquid freezing m
34. fe of machine our products are designed as the followings when ambient temperature is higher than 32 C if setting temperature is lower than 82 C it will return to 82 C if ambient temperature is lower than 32 C including 32 C it will return to original setting 78 88 Question Why is it displaying EO and other signs Answer Main sensor failure E2 condenser sensor failure E1 ambient temperature sensor failure E0 check if above wiring is normal or not if is not normal please contact after sale service personnel for maintenance or replacement O Question If the machine is moving when open its doors what shall do Answer Our machines have casters which are flexible moveable lockable and supportable and can be slightly adjusted according to request After a machine is installed on the position appointed by a user the two front casters shall be fixed to prevent the machine from moving when its doors are opened Question Why the door of low temperature cabinet can not be opened Answer there are two cases First case There is a balance hole at the bottom of door body if it is blocked by ice the stuffiness may cause internal pressure to be too low and so the door can not be opened There is also a possibility that balance heater strip is broken so a new part needs to be replaced for you Disposal method Squeeze in a thin iron sheet between door sealing strip and door body to let air enter into refrigerat
35. gh and low temperature alarm sensor alarm high and low voltage alarm alarm of bad radiating of the condenser alarm of ambient temperature exceeding standard LV alarm and power failure alarm 1 6 Two alarm modes voice buzz alarm and light flashing alarm Multiple protective functions startup delay protection LV compensation protection and HV compensation protection 1 7 It has network functions provided with RS 232 data interface to connect the computer then the temperature inside cabinet can be displaced via computer to display the alarm information The temperature can be controlled by computer and whether the monitoring equipment is normal 1 8 It has the remote alarm function to connect the alarm equipment to realize alarm funciton of other rooms 1 9 HV and LV automatic compensation function 1 10 Caster wheels are provided which are flexible movable and locked 1 11 Recorder network monitoring system short message software freezing rack and freezing box can be provided 1 12 It has the function of short message alarm control 1 automatically send the alarm measage to 2 users at the same time 2 the user can send the short meassage to machine to inquire temperature and alarm 3 the user can send the short message to machine via mobile to set the temperature inside cabinet high and low temperature alarm value etc 6 88 Product appearance DW 86L388 486 628 728 828 TOR UA ull 7 88 DW 86
36. he placement room 31 Product installation and matters needing attention 32 ee SDECHICANONS OP EOD PANEL so rela ge 35 X X 35 2 Iemperature SEMO D 35 2 HON Temperature rt EE 36 d LOW Temperature bs Mti AE meet e eternal 36 eelndicating of working status of display panel 37 eeindicauon of alarm KE bc atau B 38 EE KEE EECHER 40 1 Setting of password value EE 40 2 SEWING Ko Bd 40 SAKE ee 40 EELER EEE 40 5 Requiremelitsoorballely EE 41 0 Oe nee E fault e EE 41 e EL EE 42 OF AQUI COGS E 43 The mal Paull ee 43 eeProduct use and 46 ER SR EN Rn usq r obec adnate ag 46 2 Ulira low temperature cabifiet USC u uuu u dere pb ME dus 46 3 Pressure switch and infusion of freezing medium 4T 4 FAN ee TEE 50 se Gas collection and Charg res teo bus dat date e boe t adulte ee Ue ammesso dba 51 1 Diagram of refrigerating machine rete alde A 51 2 Compressor ele un 51 The characteristics of the refrigerant nnne nnne nennen nnn nnns 52 4 Relrgerantperlusioh plOCeSS eeh tabe tavi Vic eege 52 5s Inf siol
37. l 129 1 9 7 1 465 EES LA es ES Display panel 23 88 Rechargeable battery High Temperature compressor s Blower fan Low Temperature compressor 24 88 Suction fan Power panel Pressure switch mn ZEN gt amp le 9 t O O m I JOB 101 Reduction relay Heat prober St Heat prober Connections on Main Connector Connect to Usage 25 88 Specifications of sensor 1 The value of the probe resistance varies with temperature probe type NTC temperature Resistance temperature Resistance temperature Resistance temperature Resistance KO e 26 88 2 The value of the probe resistance varies with temperature probe type PT100 temperature Resistance temperature Resistance temperature Resistance temperature Resistance Co KO KO KO KO 27 88 Detailed technical data of the product Overall dimensions Inner dimensions Effective Input Compre Inner Rated voltage depth width height depth width height Type power W door volume L ssor mm mm DW 86 288 286L 220V50Hz 930W 1641 915 870 971 620 550 SC21CL DW 86 388 386L 220V50Hz 1000W 1980 915 870 1310 620 550 SC21CL DW 86 GS26CL 628 626L 220V50Hz 1200W 1980 1035 900 1310 760 630 DW 86 GS26CL 728L 220V50Hz 1200W 1
38. lamp if the lamp lights indicating the condenser is blocked by dirt and needs to be cleaned When it is felt that the difference between the condenser and the ambient temperature is greater than or equals 13 C after 5 minutes later dirty condenser indicating lamp lights accompanied by the buzzer alarm indicating lamp if the lamp lights indicating the low battery and will be charged when the battery is connected to AC power the low temperature refrigerator will charge it automatically Notes When all alarms appear light alarm signal will immediately flash to alarm as well as the high and low temperature alarm information 15 minutes after light flashing the buzzer begins to send alarm by voice for the alarm information on power interruption and overvoltage the buzzer beings to send alarm by voice after the light flashes for 1 minute Under the power interruption the display appears black screen without any other information displayed and the alarm lamp operates under alarm mode After the black screen lasts for 30 seconds the display panel will normally display for 5 seconds and alternatively display as per this mode For alarm information on dirty condenser when the light flashes the buzzer and the voice will send alarm at the same time for that on low battery light flashing alarm is available without buzzer alarm for that on too high 38 88 ambient temperature when the ambient temperature exceeds 38
39. nd for 24 hours after the power use after you install the fixed place 7 2 The room temperature should be kept below 28 C If the ambient temperature is higher than 32 the cooling efficiency will decline rapidly and ambient temperature for a long time is higher than 32 may result in compressor damage or reduced life therefore to use the product environment is recommended to install air conditioning 7 3 Single piece of equipment should be independent and use a socket and power socket withstand current should be greater than 16A and reliable ground 7 4 Energized when you first open the battery switch on the machine electrical control box take a long time to shut down the power to turn off this switch 7 5 The cryogenic refrigerator door every time the time to try to not more than 1 minute before closing the door seals on the ice water to wipe clean to ensure good sealing effect 7 6 In order to extend the useful life of equipment and reduce energy consumption use under the premise of ensuring the security of stored items it is recommended that the temperature of the device is set between 50 C 80 C optimal 7 7 The device uses chilled goods and should not be used as quick frozen box cannot force rapid freezing a lot more hot items or large volume liquid items 7 8 If energization 2 3 hours after the machine is not cooling please unplug the power and as soon as possible and after sales contact 7 9 Eliminated in accordance with the dis
40. nnector plugs s are Change the connector plugs damaged Check contact and make in good 3 Bas wire contact condition 1 High temperature level Checking if it is due to bad fail 4 Display panel and control panel connection failure compressor fails to start connection otherwise change it 5 Relay start capacitor or heat protector is Change the part damaged 6 Compressor fault Change the compressor 7 User s voltage is too low Add a manostat 1 Same reason as high temperature level Same measure as high compressor temperature level compressor 2 Low temperature level 2 Pressure switch is damaged Change the pressure switch compressor fails to start 3 High temperature level compressor has poor Repair high temperature level refrigeration refrigerating system 1 Fan wiring is loose Checking the wiring 3 Fan does not rotate 2 Fan blades are blocked by foreign matters Checking and clean them 3 Fan is damaged Change parts 1 The temperature setting of outage is too high Re set computer board Find leak location and make repair 2 Refrigerant leaks welding Infuse refrigerant again 3 Temperature probe is damaged Change parts 4 High temperature in Clean the capillary tube or change cabinet 4 Capillary tube or system is blocked by dirt greasy S SES d ilter Turn on air conditioner reduce 5 High ambient temperature ambient temperature 1 Temperature probe sho
41. o 200V the booster will be connected to boost When the input voltage increases to 210V the booster will be disconnected with boosting amplitude 12V when the input voltage increases to 230V the booster will be connected to reduce voltage When the input voltage drops to 215V the booster will be disconnected with reduction amplitude 12V When the input voltage drops to 184V the compressor is in operation for a long time under no shutdown The alarm lamp flashes without buzz alarm when the input voltage increases to 253V the compressor will operate as per the normal procedure at the same time the alarm lamp flashes without buzz alarm Backup system lamp lights indicating the system is in operating status 37 88 Indication of alarm status indicating lamp if the lamp lights indicating the alarm display when the temperature inside the refrigerator is higher than the setting value indicating lamp if the lamp lights indicating the alarm display when the temperature inside the refrigerator is lower than the setting value lamp lights indicating the voltage is lower than 184V 95V or higher than 253V 136V buzzing indicating lamp if the lamp lights indicating the ambient temperature is higher than 32 indicating lamp if the lamp lights indicating the sensor has faulted indicating lamp if the lamp lights indicating the interruption of power line indicating
42. oached by the children because it will possibly produce suffocation accident When 2 is used to cool the system as an auxiliary mode air ventilation in the room shall be noted Rise of Co2 concentration in the air will harm the health and endanger the life safety When moving the storage box its inclination angle shall exceed 45 degree Don pour the water on the equipment directly otherwise the electric shock or short circuit will be caused user shall dismantle repair change the equipment by him If the above operations are done by the unauthorized personnel fire disaster or personal injury may be caused because of improper operation d If the equipment is placed at the unattended area for a long time please ensure that the children won t approach it and the box door can t be closed fully the storage box is disconnected from the power it shall be connected again five minutes 71 88 later so as not to damage the compressor or system The power plug must be pulled out during maintenance Don t roll or damage the power wire Disposal of the discarded equipment must be carried out by the relative personnel The box door shall be dismantled to avoid the accidents such as suffocation 72 88 3 Points needing attention during normal use disposal of special circumstances Ifthe equipment has any fault please check the following faulty points before mainten
43. of the vacuum pump is necessary for taking the time to 12 hours PICTURE 1 54 88 PICTURE 3 PICTURE 4 55 88 high temperature level perfusion the machine should be in a stopped state before perfusion R134A refrigerant and then perfusion R404A refrigerant Perfusion was performed in accordance with the attached table Note 1 To ensure the refrigerant once reperfusion in place the above refrigerant is required when the cylinder is inverted perfusion liquid perfusion in Figure 5 2 Low level refrigerant reperfusion the same machine should be in a stopped state first perfusion HRA refrigerant then perfusion HRB refrigerant because of higher the HRB refrigerant pressure Perfusion was performed in accordance with the attached table Irrigation after the infusion process tube sealing sealing effect is shown in Figure 6 Note 1 Low Temperature perfusion must be accurate small differences will affect the cooling effect 2 low temperature and high pressure refrigerant refrigerant cylinder is relatively small perfusion to open the cylinder valve slowly to avoid the waste of refrigerant 3 HRB refrigerant pressure is too high the general cylinders can not withstand the high pressure so the use of oxygen bottles filled irrigation HRB refrigerant cylinder below the export blocked with screws to prevent the leakage of 56 88 refrigerant necessary using the above export perfusion the above infusion refrigeran
44. on Fix the machine well with fixed bolts Good ventilation indoor Don t use the same socket with the plug of other equipment the plug and socket must be connected securely Please note that the power line shall not be twisted or pressed If the wire shall be lengthened standard of the feeder line will be 230V and 15A and the lengthened part shall not exceed 3m The equipment is especially used for 208 230 50 60Hz power Please check the operating voltage before use if it is lower than 180V then the transformer will be used to boost and the total transformation power shall be greater than 3kW When the voltage is higher than 230V the transformer will be used to reduce the voltage For the areas with unstable voltage the stabilizer shall be applied to guarantee the normally input voltage to be stabilized at 220V 10 Power of the stabilizer shall be greater than 3kW The equipment must be guaranteed to reliably ground If the power plug is equipped with the earth wire please check its output before use If the socket hasn t any earth wire firstly connect the earth terminal of the equipment to the earth wire then connect the other end of the earth wire to a copper plate finally bury it 33 88 underground burial depth is 25cm at least Notes The earth wire shall not be connected to the gas pipe telephone line or lighting line 3 3 Method of application after completion of installation For
45. or Second case When a user is storing an object containing water if water flows to sealing strips and freezes the door is unable to be opened Disposal method open the door with a tool There is a standby battery in every machine when there is power failure or a machine is breaking down the battery will supply power to display panel through the temperature displayed on display panel users can see the change of temperature inside machine Disposal method Check if battery switch is open or not if battery wiring and switch wiring are plugged or connected in position if battery electric quantity is over 10 5 V for old products with mode of 79 88 6 it shall be over 7 5 so model machine computer panel can recharge battery if battery electric quantity is lower than 10 5 for old products with mode of 6 when it is lower than 7 5V a machine starts to recharge the battery it takes about 5 days to finish recharging battery if the machine still meets the problem of battery alarm the battery needs to be replaced When the machine is not used battery switch must be turned off otherwise after battery electrical quantity is exhausted the battery cannot be recharged which will cause the battery to be scrapped There are three kinds of cases that may cause the alarm First new machine as there is a sensor on condenser when condensing temperature exceeds 38 C exceed 32 C in earlier stage at this time dirty condenser
46. ot be touched with wet hands otherwise the electric shock will be produced S When the equipment is restarted after power failure or the power is shut off its settings shall be checked Change of settings may damage the articles stored Don t put the vessels with water or heavy object on the equipment If the articles fall personal injury may be caused and the water from it will produce current leakage or electric shock due to reduction of insulation degree Don t climb up the equipment or put articles on the equipment otherwise personal injury or 70 88 equipment damage will be caused due to equipment turnover Close the box door with your hand holding the handle to avoid the fingers being clamped d Don t put the glass bottle or canned goods into the box since personal injury will be caused due to their frost cracking Don t touch the goods stored Direct touch of the freezing articles or inner wall of the equipment may produce cold injury S The gloves shall be worn during repair to avoid damaging the hands by the sharp edge or corner d The filter net shall check immediately and cleaned if necessary The filter net with accumulated dust will lead to temperature rise or fault When the equipment hasn t been used for a long time the power plug shall be pulled out to avoid electric shock current leakage or fire due to ageing of power wire plastic bags shall be appr
47. ow temperature cabinet stops operation pressure begins decreasing when pressure 47 88 decreases to 1 35MPa contact connects low temperature cabinet starts up when pressure exceeds 2 1MPa again contact disconnects again and it circulates in order Note When pressure switch is being welded put a wet towel on it to keep temperature below 100 C The parameters of pressure switch cannot be adjusted Parameters voltage 220V 50Hz contact capacity 6A Freezing medium is mixture part of it is inflammable and explosive freezing medium ventilation is required at infusion place In case of leakage avoid fire and spark near the place When refrigerating system has a problem it shall be judged by local after sale service personnel the problem shall be feed backed The technicians of Medical Application Business Department shall instruct local after sale service personnel to repair it When DW 86L386 series of ultra low temperature cabinet products are repaired there are very strict requirements for environment and repair otherwise refrigerating effect may be bad to normalize the maintenance operation specification of medical application refrigerator DW 86L388 series of ultra low temperature cabinet products the following requirements shall be followed Before the maintenance of system at first you should know the refrigerating principle of DW 86L388 series of ultra low temperature cabinet products the series of model is
48. pair welding Change the compressor Find the leak location and make repair welding Change the compressor Find the leak location and r make repair welding Reduce infusion Same repair measure as the non start of high low temperature level compressor Fault Analysis Maintenance Measures 1 The user s test instrument is not accurate Change the test instrument under locked state press down temperature button until temperature calibration value 8 Displayed temperature is 2 Temperature probe of sensor is not accurate displays flickeringly on the displaying different from actually tested area of setting temperature now you temperature can set a new temperature calibration value 3 Displayed temperature is the temperature at the temperature control probe it is normal that there is certain temperature difference between upper part and lower part in refrigerator If a user opens and closes the door frequently Reduce the times of opening and 9 Temperature difference it is normal that temperature inside the box is closing the door between upper part and unstable it is not fault lower part in refrigerator is It is normal that there is temperature difference too large between upper part and lower part in low temperature cabinet 10 it Displays that inside temperature sometimes is Computer board has a failure refrigerating high and sometimes is Change the Computer board system can not
49. perature inside the refrigerator must be confirmed to have adequately dropped then put the articles into it in batches to avoid temperature rise eTemperature display value of ultralow storage box is to display the temperature of heat detector of the storage room Although there is a difference between the displayed temperature and the actual temperature in the center of storage room it will approach to the true temperature gradually eA through hole is provided on the backwall board of the storage box so as to lead out the measurement wire from the refrigerator during testing After the measurement wire is led out the testing hole must be blocked well again with heat insulating material otherwise the temperature inside the storage room won t drop completely and condensation will be caused around outside the through hole eThe equipment shall be cleaned with the diluted neutral cleanser the cleanser undiluted will damage the plastic components Refer to Instructions for Cleanser for the dilution method The storage box shall not be cleansed with brush acid gasoline soap power polishing power or hot water because they will damage the painting surface or the plastic or rubber parts It must be specially note that the plastic or rubber parts shall not be wiped with the volatile solvent such as gasoline eAfter the storage box has run for a period a layer of frost will be formed on the inner wall and inner door of the refrigerator body If
50. play panel prompts encountered alarm malfunction or other failure malfunction such as silent or not self troubleshooting please do not attempt to disassemble contact the after sales professional maintenance staff to help eliminate the fault 42 88 Fault code The main fault codes DPerception condenser temperature minus ambient temperature difference gt 13 C for five minutes the condenser is dirty indicator light and accompanied by a buzzer alarm the initial on electricity within two hours the indicator and buzzer not alarm 2 When the sensor failure sensor failure indicator light 3When the main sensor failure the display alternately shows the actual temperature and the main sensor fault code E2 Main sensor in the boxType PT100 4 When condensation sensor fails the display alternately shows the actual temperature and the main sensor fault code E1 43 88 Condenser probe Type NTC When the ring temperature sensor failure the display alternately shows the actual temperature and the main sensor fault code EO Probe NTC When heat exchanger sensor failure sensor fault code in the display alternately shows the actual temperature and the heat exchange Select 86 failure fault disappears after the buzzer canceled 5 seconds long press E3 fault display boot when the high temperature level press start the Low Temperature pressure machine d
51. prepare everything in advance when you are going to infuse low temperature level freezing 58 88 medium at the time of infusion you must turn on cylinder valve a little to avoid wasting freezing medium and affecting maintenance progress When infusing low temperature level freezing medium machine shall also be under the status of stop firstly infuse HRA freezing medium then infuse HRB freezing medium as HRB freezing medium has very high pressure ordinary cylinders cannot bear very high pressure so oxygen cylinders are used to contain HRB freezing medium at the time of using the exit at the bottom of cylinder must be plugged up with a screw to prevent freezing medium from leaking The top opening can be used for infusion when infusing above freezing mediums cylinders can be infused with gas vertically To ensure the accuracy of freezing medium infusion at the time of infusing all freezing mediums an electronic scale shall be used to weigh the infusion If the evacuation time of machine system freezing medium infusion are not carried out according to above time requirement and operation flow as a result a machine has bad refrigeration or no refrigeration and the machine is replaced or returned once verified by our head office those that are re maintained shall be claimed according to two times of the machine s maintenance cost in case that machine is replaced or returned the maintenance shop shall pay for the cost As the system
52. quipment s compressor is bigger than the household products eTapping It may be caused by the urgent cooling and shrinkage of the parts inside the equipment 73 88 hence the equipment temperature shall be reduced by steps to avoid too much temperature reduction within a short time Warning In order to prevent electric shock or personal injury the equipment shall be disconnected from the power prior to any repair or maintenance Ensure that the chemicals or suspended particles around the equipment shall not be absorbed during maintenance otherwise it will endanger your health 74 88 Other maintenance and repair Storage box shall be cleaned once a month Regular cleaning can make storage box keep clean appearance Use a dry cloth to wipe off dirt on box shell inner chamber and all attached bodies If storage box is very dirty dip a clean cloth into neutral detergent and remove dirt and then use a wet cloth to remove residual detergent at last use a dry cloth to wipe dry Undiluted detergent may damage plastic parts please refer to the instructions for diluting detergent Don t pour water on storage box shell or in storage chamber otherwise electrical insulation may be damaged which may cause failure Compressor and other mechanical parts are under totally seal state they need not to be lubricated Frost or ice on inner wall shall be removed once a month condenser filter screen shall also be cleane
53. rrent A Rated voltage V 2 Cooling mode Forced wind cooling 51 88 3 The characteristics of the refrigerant 1 Refrigerant mixed working quality some flammable explosive refrigerant perfusion spaces should be ventilated once the leak not in the vicinity of the Ignition or sparking Refrigeration system problems feedback issues point by the local aftermarket judgment and guidance of the local after sales maintenance depending on the situation by the Medical Division technical staff 2 Refrigerant code high temperature level for R134a and R404a Low Temperature the HRA R290 and the HRB R508b 4 Refrigerant perfusion process 1 refrigerant R134A R404A HRA HRB 2 Hansen valve 3 standard electron error lt 3g 4 vacuum pump 2 4L 5 The pressure gauge requirements can be read at the same time a high pressure low pressure is shown in Figure 1 1 The failure of the system from the end of the process tube pipe clamp cut 52 88 open and let go of the refrigerant in the system 2 in the system the opening 20 minutes the open pipe with a pressure gauge welding is completed Note 1 This model is a two refrigeration sub high temperature and low temperature level two separate sets of system maintenance do not avoid two systems at the same time to open must understand that the open set of system 2 the maintenance shop humidity can not be too large in case of cloudy rainy weather
54. rt circuit or disconnect Checking the temperature probe 5 Display board displays EO E1 E2 2 No temperature probe Install a temperature probe 61 88 Fault Analysis Maintenance Measures Change the location of the 6 Freezing cabinet noise is high 7 Ultra low temperature freezing cabinet does not refrigerate 1 Uneven placement 2 When compressor is running there is resonance between pipeline and cabinet 3 Interior fan and fan holder are fixed tightly 4 Compressor connecting bolts are loose High temperature level compressor vent pipe is not hot Low temperature level compressor vent pipe is not hot High and low temperature level compressor vent pipes not hot Low temperature level compressor protection Compressor does not start High low temperature level pipe leaks Compressor is damaged Low temperature level pipe leaks Compressor is damaged High low temperature level pipe leaks Compressor is damaged High temperature level pipe leaks Low temperature level refrigerant is infused too much Same analysis as the non start of high low temperature level compressor 62 88 freezing cabinet Clear up pipeline or add a shock pad under compressor baseboard To avoid resonance Fix them Screw the connecting bolts tightly Find the leak location and make repair welding Change the compressor Find the leak location and make re
55. se 69 88 explosion or fire The corrosive articles such as acid and alkali shall not be stored in the equipment otherwise its inner components or electric parts will be damaged S The metal object such as iron nail or iron wire shall not be inserted into any port or clearance of this equipment or any exhaust port for inner air circulation otherwise the electric shock or damage will be produced due to the contact between above object and running part When the equipment is used to store the poison harmful or radioactive articles it shall be used in the safe area Otherwise it will cause personal injury or environmental harm due to improper use d When the inflammable gas such as gas leaks the leakage valve shall be shut off Then open the doors and windows for ventilation and exhaust Don t pull out or insert the power plug of the storage box d The equipment power shall be disconnected prior to its any repair or maintenance to avoid electric shock or personal injury During maintenance the chemicals or suspended particles inside the equipment and it s around shall not be absorbed otherwise the health hazard will be caused When the plug is pulled out from the power socket the plug shall be tightly held its lead shall not be pulled If it is pulled with hand the electric shock or fire disaster due to short circuit will possibly produced 4 Any electrical parts or switch such as power plug shall n
56. t cylinders upright perfusion the perfusion gas 4 In order to ensure the accuracy of refrigerant perfusion perfusion of all refrigerant necessary electronic weighing scales perfusion 5 Evacuation and refrigerant perfusion is not in accordance with the above requirements and operating process execution lead to machines refrigeration poor or no refrigeration and returned machine outlets 6 The number of ultra low temperature cabinet products perfusion refrigerant accuracy g is very strict said in 3g standard electronic network maintenance must be prepared before an error PICTURE 5 57 88 PICTURE 6 5 Infusion flow of freezing medium The schematic diagram of each freezing medium cylinder infusion flow of freezing medium When infusing high temperature level freezing medium machine shall be under the status of stop firstly infuse R134Afreezing medium then infuse R404Afreezing medium to ensure that freezing medium can be infused successfully at one time at the time of infusing above freezing mediums cylinders must be placed upside down to infuse liquid As the infusion quantity of low temperature level freezing medium is small and the requirement for the infusion quantity of freezing medium is very strict if infusion quantity is not accurate refrigerating effect will be directly affected As low temperature freezing medium has high pressure freezing medium in cylinder is small so you are required to
57. tatus after it is switched on and all parameters on the display screen will be saved as those before the last power interruption The displayer will display the actual temperature setting temperature and current voltage Indication of working status of the display panel Lock indicating lamp if the lamp lights indicating all settings are locked to prevent misoperation Network lamp if it lights indicating the network system has been in operating status Operating lamp if it lights indicating the compressor is operating Stabilization lamp if it lights indicating the voltage booster is boosting or reducing the voltage 115V When the refrigerator is applied to 115V circuit when the input voltage drops to 98V the booster will be connected to boost When the input voltage increases to 113V the booster will be disconnected with boosting amplitude 12V when the input voltage increases to 125V the booster will be connected to reduce voltage When the input voltage drops to 120V the booster will be disconnected with reduction amplitude 12V When the input voltage drops to 95V the compressor is in operating for a long time without shutdown The alarm lamp flashes free from buzz alarm when the input voltage increases to 136V the compressor will operate as per the normal procedure at the same time the alarm lamp flashes free from buzz alarm 220V When the refrigerator is applied to 220V circuit when the input voltage drops t
58. the ultralow temperature cabinet firstly used or after the ultralow temperature cabinet is handled or the ultralow temperature cabinet experiences power failure including outage for more than 10 hours then the equipment must be verified before use or before energization The verification shall confirm that The equipment shall be energized only after the refrigerator has been rested for more than 24h The articles shall not be put in the empty cabinet Turn on it after energization and then cool it by stages Firstly cool it to 40 C then to 60 C after normal startup and shutdown Then cool to 80 C 8 hours after its normal startup and shutdown Observe the refrigerator for normal startup and shutdown for over 24h to prove its normal performance S After the refrigerator is confirmed to be normal as per 2 and then the articles can be put in it In principle the articles stored at 60 C shall not exceed 1 3 volume If temperature of the articles stored exceeds 60 C then the temperature of refrigerator shall be set at a temperature higher 3 than that of the articles stored that is to say if the material temperature is 20 then the temperature of the refrigerator shall be set at 23 C The refrigerator shall be guaranteed to normally startup and shutdown for more than 8 hours Prohibitions All low temperature storage boxes shall be low temperature store equipment which is used to store low temperature articles but not to fr
59. ubes When evacuation time has been reached firstly stop high pressure evacuation and the opening of high temperature infusion tube shall be sealed and welded immediately as the pressure of freezing medium is too high when a machine is refrigerating high pressure can not seal the opening low pressure evacuation shall continue for an hour During this period prepare freezing medium needed for infusion and relevant equipment After one hour low pressure evacuation turn off pressure gage valve now it is required that the machine shall keep the state of negative pressure for more than one hour to check if machine system is in vacuum state or not During this period check if pressure gage appears the condition of rising otherwise re vacuumize for more than one hour then keep the state of negative pressure for more than one hour carry out such evacuation operation until pressure doesn t rise then infusion can be carried out 49 88 4 Fan parameters Product model SL 490C2W Parameter Fan application Evaporation fan Condensation fan was mm _ Input power 50 88 Gas collection and charge 1 Diagram of refrigerating machine 2 Compressor parameters Product model DW 86L386 288 388 DW 86W420 Compressor model SC21CL Voltage range V 2087230 Refrigerating 3 4 HP Rated frequency Hz output W Compressor model Voltage range V Refrigerating Rated frequency Hz output W Input power W 927W Cu
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