Haier Freezer DW 86L388 P020130723364441210402

User Manual: Haier Freezer DW-86L388

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Page Count: 88

Servic

Manu

l

Ultra‐l

DW-86L

DW-86

owTe

88•DW-86

486•DW-8

DW-86

peratu

L338•DW-

L628•DW-

1006•DW

HaierM

eRefri

6L388•DW

6L728•D

86W420

edical&

erator

86L388A

-86L828

aborator

FILENo

Produc

:HMRSM

sCo.,Ltd

‐001‐01

.



2/88



Effective models

This service manual is effective for following models

Model name Product code Voltage(V) Frequency(Hz) Plug-type

DW-86L288 BE06S8E1T 220 50 All

DW-86L338 BE0FU3E1T 220 50 All

DW-86L388 BE06RCE1T 220 50 All

DW-86L388A BE0FV3E1T 220 50 All

DW-86L486 BE06RJE1T 220 50 All

DW-86L490 BE06QGE1T 220 50 All

DW-86L626 BE03D2E1T 220 50 All

DW-86L628 BE06QLE1T 220 50 All

DW-86L728 BE0EZLE1T 220 50 All

DW-86L828 BE0F09E1T 220 50 All

DW-86W100 BE0385E1T 220 50 All

DW-86W420 BE0381E1T 220 50 All



3/88



Content

●● Designation ........................................................................................................................................... 5

●● Introduction to product features ............................................................................................................ 6

●●Product appearance ............................................................................................................................... 7

●●Parts layout .......................................................................................................................................... 14

1. Display structure ........................................................................................................................... 14

2. Box structure ................................................................................................................................. 14

3. Electronic structure ....................................................................................................................... 17

4. System architecture....................................................................................................................... 20

●●Cooling unit parts ................................................................................................................................. 21

●●Refrigeration circuits ............................................................................................................................ 22

●● Circuit diagram .................................................................................................................................... 23

●●Connections on Main PCB ................................................................................................................... 25

●●Specifications of sensor ....................................................................................................................... 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: PT100) .......................... 27

●●Detailed technical data of the product .................................................................................................. 28

●●product nameplate ............................................................................................................................... 29

●●Transportation and Installation ............................................................................................................. 30

1. Transportation of the product and removal of package ................................................................. 30

2. The product enters the placement room ........................................................................................

3. Product installation and matters needing attention ........................................................................ 32

●●Specifications of LCD panel ................................................................................................................. 35

1. Unlock ........................................................................................................................................... 35

2. Temperature setting ....................................................................................................................... 35

3. High Temperature Alarm ................................................................................................................ 36

4. Low Temperature Alarm ................................................................................................................ 36

●●Indicating of working status of display panel ........................................................................................ 37

●●Indication of alarm status ..................................................................................................................... 38

●●Setting of special functions .................................................................................................................. 40

1. Setting of password value ............................................................................................................. 40

2. Setting of start delay...................................................................................................................... 40

3. Calibration function ....................................................................................................................... 40

4. Control of condensate fan ............................................................................................................. 40



4/88



5.Requirements of battery control ..................................................................................................... 41

6. Meanings of fault codes ................................................................................................................ 41

7 Precautions .................................................................................................................................... 42

●●Fault code ............................................................................................................................................ 43

The main fault codes ......................................................................................................................... 43

●●Product use and maintenance ............................................................................................................. 46

1. Principle of work: ........................................................................................................................... 46

2. Ultra-low temperature cabinet use ................................................................................................ 46

3. Pressure switch and infusion of freezing medium ......................................................................... 47

4. Fan parameters ............................................................................................................................. 50

●●Gas collection and charge .................................................................................................................... 51

1. Diagram of refrigerating machine .................................................................................................. 51

2. Compressor parameters ................................................................................................................ 51

3. The characteristics of the refrigerant ............................................................................................. 52

4. Refrigerant perfusion process ....................................................................................................... 52

5. Infusion flow of freezing medium ................................................................................................... 58

●●Refrigerant perfusion Details ................................................................................................................ 60

●●Troubleshooting ................................................................................................................................... 61

●●How to deal with High temperature alarm ............................................................................................ 65

●●How to deal with Low temperature alarm ............................................................................................. 66

●●Points needing attention during normal use of the product ..................................................................

1. Points needing attention during normal use-proper use ................................................................ 67

2. Points needing attention during normal use-safety requirement ................................................... 69

3. Points needing attention during normal use-disposal of special circumstances ............................ 73

●●Other maintenance and repair ............................................................................................................. 75

1. Clean storage box ......................................................................................................................... 75

2. Clean condenser filter screen ........................................................................................................ 75

3. Clean filter screen with water. ....................................................................................................... 75

4. Defrost inner wall .......................................................................................................................... 76

5. Battery maintenance ..................................................................................................................... 76

●●FAQ ...................................................................................................................................................... 78

1. Common Faults Analysis and Maintenance Measures .................................................................. 78

2.Alarm of battery low electric quantity: ............................................................................................. 79

3.Alarm of dirty condenser: ............................................................................................................... 80

●●Used Spare Parts Photo Gallery .......................................................................................................... 81

●●Testing Date ......................................................................................................................................... 86



5/88



【Designation】

Regulationsfortypenaming:



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628L.



DW XX X XXX X

Design No. is expressed with pinyin character

sequence

Rated volume value is shown with L

Classification of low temperature cabinet (W is

horizontal and L is vertical)

It shows the temperature at the characteristic point

inside cabinet (without minus mark)

(For example: temperature at the characteristic point

inside cabinet -86℃ can be expressed as 86)

Low temperature cabinet



6/88



【Introduction to product features】



1.1Temperatureinsidetheultralowtemperaturecabinet:‐10~‐86℃,adjustable，temperatureset

arrange‐40～‐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(high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.





7/88



【Product appearance】



DW‐86L388/486/628/728/828



8/88



DW‐86L288



DW‐86L338/388A



9/88



DW‐86L490



DW‐86W100



10/88



DW‐86W420



11/88



【Dimensions】

DW-86W100



12/88



DW-86L490



13/88



Other Modles



SN Model A B C D E F G H I

1 DW-86L388 1310 550 296 620 1960 1980 620 915 870

2 DW-86L486 1310 630 296 590 1960 1980 590 945 900

3 DW-86L628 1310 630 296 760 1960 1980 760 1035 900

4 DW-86L728 1310 630 296 870 1960 1980 870 1145 900

5 DW-86L828 1310 710 296 870 1960 1980 870 1145 980



14/88



【Parts layout】

1. Display structure



2. Box structure



Locked

network

Run

ulator

Back s

stem

High temp

alarm

Low temp

alarm

Sensor failure

Low batter

Condenser dirty

High ambient

temperature

Buzzer cancel

Shelf:replacethe

shelfaround45°

Shelfstrips

Innerdoor:PU

foamstructure

Theinnerdoor

outerseal

Innerdoormiddle

seal

Maindoors:PU

foamstructure+VIP

Outerdoormiddle

seals

Outerdoorouter

seals

Chartrecorder

Inletgrille

Power failueImproper

voltageambient

temperatur

Voltage

Maindoorhandle



Main

cover

senso

Stainl

shelvi

dec

enser:The

ofthemain

rinthebox

sssteel

gfixedcla

xbeams

ratedbar

ixed

p



15/88



Innercol

Material:

steelshe

r:Creamye

electro‐galv

t

Inner door

replace dis

handle the

rotation of t

Cabinetmo

low

nized

andle:

antled

enter of

escrew

th



Theca

Thec

Doorh

Nam

num

esthole

O2backup

abinguard

binrightgua

binleftgua

owercode

inge(under)

plateand

er

enserhole

ystem

late

d

serial



16/88



Powe

Batte

rswtich

ryswtich



3. Elect



in control bo

Lowte

pressuri

Thehig

BuckAC

Transfor

Batt

Conde

onic str

perature

edACconta

temperatur

contactor

er

ry

ser

cture

tor



Ele



17/88

tricalcontro

box

Remote

alarm

wirin



R232/

port



iringboard

Relay

85serial

odule

Batter

Switch

Condens

Fan



r



18/88



High temperature

compressor

Low

temperature

compressor

Condensation

fan

Induced draft

fan

Standby

Pressure

increase

Pressure

decrease

MotherBoard



19/88



Network

connection

Display

panel

connection

Temperature

regulation

screw

Master sensor

Condenser

sensor

Heat

exchanger

sensor

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.

Ambient

temperature sensor

MotherBoard

Voltage

adjustment

Screw



20/88



4. System architecture





Compressor: look from the back

The left: High temperature stage

The right: Low Temperature stage

High-stage

gas-liquid

separator

High‐temperature

filter

Low‐temperature

filter

Anti‐dewtube

Hightemperature

condenser

Condenserfan

Oilseparator

LowTemperat ure 

pressurecontrol

valve



21/88



【Cooling unit parts】



Partdecripetionparameter

ModelsHightemperaturestageLowtemperaturestage

compressor

DW‐86L628/728/828

Escop/DanfossGS26CLX

power220‐240V/50Hz

Startcapacitance117U5381（100uF）

Runcapacitance117‐7135（20uF）

compressor

DW‐86L628/728/828

DanfossGS26CLX

power208‐230V/60Hz

Startcapacitance117U5381（100uF）

Runcapacitance117‐7138（20uF）

compressorDW‐86L486/388/288/490/338/

388A

DW‐86W420

Escop/DanfossSC21CL

power220‐240V/50Hz

Startcapacitance117U5373（80uF）

Runcapacitance117‐7112（10uF）

compressor

DW‐86L628/486

Escop/DanfossSC18CLX.2

power115V/60Hz

Startcapacitance117U5043（410uF）

Runcapacitance117‐7114（23.5uF）

compressor

DW‐86L486/338/490

Escop/DanfossSC18CLX.2

power208‐230V/60Hz

Startcapacitance117U5373（80uF）

Runcapacitance117‐7121（10uF）

compressor

DW‐86W100

Escop/DanfossSC12CL

power208‐230V/60Hz

Startcapacitance117U5017（80uF）

Runcapacitance

RefrigerantInthenameplateR134aR404aR290R508b

RefrigerantOilAlltheULT‐freezerRH32H

EvaporimeterDW‐86L486/388/288/490/628/ /Ф9.52X0.8

EvaporimeterDW‐86L338/388A/Ф9.52X0.75

gas‐liquidseparatorAlltheULT‐freezer0.130XФ60X1.2/

FanmotorAlltheULT‐freezer EBM M4Q045-CA03-51, AC230V/50/60Hz, 36/34W

DisplaypanelAlltheULT‐freezerHaierHY‐DLBPCB‐220V/120V

ControlboardAlltheULT‐freezerHaierHY‐DLBPCB‐220V/120V

Dry‐filterAlltheULT‐freezerDanfoss DML 083S

gas‐liquidseparatorAlltheULT‐freezer/Temprite900G

condenserAlltheULT‐freezerФ9.52X0.33/

AternatingcurrentAlltheULT‐freezerGC6‐30S/11H（220V50Hz/60Hz45FLA,240Vac）

RelayAlltheULT‐freezer 841-S-1A-D(AC250V, 25A, T60)

BatteryAlltheULT‐freezer12V7AH/12V4AH

TransformerAlltheULT‐freezer（exceptP41-175-24 (SMY-080165)





22/88



【Refrigeration circuits】



Diagramofrefrigeratingsystem





Dry filter

Dry filter

Capillary tube

Condenser

Eva

orator

Heat exchanger

Gas-liquid

separator

High temperature

compressor Lo

temperature

compressor

Pressurecontrol

Valve

Oil separator



23/88



【 Circuit diagram】

Motherboard



Displaypanel



E B

6 5

2 1

1 2

2 1

1 2

2345678

91112131416 15

1 2

2 1

2 2

E B

7 6 5

432

1 2 3 4

78 6 5

1 2 3 4

78 6 5

7 6 5

432

2 1

1 2

Bottom Test-Point

Bottom Test- Point

25 26 27 28 29

17 17 17

17 17 17 17 17 17

17 0

1 2

123

2 1

123

2 13

2 1

K A

K AK AK A

KAKAKA

434

31 2 31 2

29282726242322

4130

4231

15171819

37 38 3932 34 35 3625

671314 12 11 5 34101621

0 0

23 1

1 2

A K

K AK A

5431 2 52 431

3 2 145

1 2 3 4 5

54321

641 2 3 55 641 2 3

122 1

1 3 421 3 42

122 1

134 2

6 7 8

689

3 1

3 2

3 1

1 2 3 4

5 4

K A

1 0

2 12 1

3 2 1

133 1



24/88



Heat prober

Power panel

Booster

High Temperature compressor

Low Tem

erature com

resso

Blower fan

Pressure

switch

Heating wire

Boosting relay

Reduction relay

Suction fan

Display

board

Rechargeable

battery



25/88



【Connections on Main PCB】



ConnectorConnecttoUsage

CN1wiringboardPowersupply

CN3CompressorrealyControlcompressor

CN4batteryBatterypower

CN5MainsensorMainsensor

CN6TwofansandheaterControlfansandheater

CN7CondensersensorCondensersensor

CN8HeatexchangersensorHeatexchangersensor

CN9Fordisplaypanelbackup

CN10Fordisplaypanelbackup

CN12ACcantactorControlthevoltage

CN13remotealarmremotealarm

CN15BackupsystemBackupsystemcontrol

CN18DisplaypanelControldisplaypanel





26/88



【Specifications of sensor】

1. The value of the probe resistance varies with temperature (probe type: NTC)

temperature

（℃）

Resistance

（KΩ）

temperature

（℃）

Resistance

（KΩ）

temperature

（℃）

Resistance

（KΩ）

temperature

（℃）

Resistance

（KΩ）

‐4063.3‐1917.825.8232.1

‐3959.4‐1816.835.5242.0

‐3855.8‐1715.945.2251.9

‐3752.3‐1615.055.0261.8

‐3649.2‐1514.264.7271.8

‐3546.2‐1413.474.5281.7

‐3443.4‐1312.784.3291.6

‐3340.8‐1212.094.1301.5

‐3238.4‐1111.4103.9311.5

‐3136.1‐1010.8113.7321.4

‐3034.0‐910.2123.5331.4

‐2932.0‐89.7133.4341.3

‐2830.1‐79.2143.2351.2

‐2728.4‐68.7153.1361.2

‐2626.7‐58.3162.9371.1

‐2525.2‐47.8172.8381.1

‐2423.8‐37.4182.7391.0

‐2322.4‐27.1192.5401.0

‐2221.2‐16.7202.4411.0

‐2120.006.4212.3420.9

‐2018.916.1222.2430.9



27/88



2. The value of the probe resistance varies with temperature (probe type: PT100)

temperature

（℃）

Resistance

（KΩ）

temperature

（℃）

Resistance

（KΩ）

temperature

（℃）

Resistance

（KΩ）

temperature

（℃）

Resistance

（KΩ）

‐13048‐8068.3‐3088.220107.8

‐12052.1‐7072.3‐2092.230111.7

‐11056.2‐6076.3‐1096.140115.5

‐10060.3‐5080.3010050119.4

‐9064.3‐4084.310103.960123.2



28/88



【Detailed technical data of the product】





Type

Effective

volume(L)

Ratedvoltage

Input

power(W)

Overalldimensions

(depth*width*height)

(mm)

Innerdimensions

(depth*width*height)

(mm)

Compre

ssor

Inner

door

DW‐86

L288/28

6

288/286L220V50Hz930W1641*915*870971*620*550SC21CL 3

DW‐86

L388/38

6

388/386L220V50Hz1000W1980*915*8701310*620*550SC21CL 4

DW‐86

L628/62

6

628/626L220V50Hz1200W1980*1035*9001310*760*630

GS26CL

X

4

DW‐86

L728

728L220V50Hz1200W1980*1145*9001310*870*630

GS26CL

X

4

DW‐86

L828

828L220V50Hz1200W1980*1145*9801310*870*710

GS26CL

X

4

DW‐86

L338

338L220V50Hz900W1866*812*8931165*465*630SC21CL 2

DW‐86

L490

490L220V50Hz1100W1980*860*9001310*590*630SC21CL 4

DW‐86

L486

486L220V50Hz1000W1980*945*9001310*590*630SC21CL 4



29/88



【product nameplate】



Forexample:DW‐86L338







30/88



【Transportation and Installation】

1. 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.Pleasenotethattheconnectingpiecesfrontandrearmustberemovedbeforethewooden

supportistakenout.



31/88



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①Removetwoscrewsbelowthefrontcapofcabinet.

②Removethefrontcap.



32/88







Removetwoscrewsoffrontcapofcabinetremovethefrontcapofcabinet

③Opentheoutsidedoorto180degree

④After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.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

①avoidthedirectsunshine

②goodventilationaroundthesite

③avoidacollectionofdust

④avoidthemechanicalswingorvibration

⑤Ambienttemperature:5℃‐28℃，themaximumtemperatureshallnotexceed32℃，andthe

optimaltemperaturewillbe18℃‐25℃.Ifnecessary,theairconditioningsystemwillbeused.



33/88



⑥Heightoftheworkingpositionoftheequipment:lessthan2000m

⑦Operatinghumidity:lessthan80%RH.Ifthemaximumoperatingtemperatureis32℃，the

humidityshallbelessthan57%RH.

⑧Input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

①Atleasta20cmclearanceshallbereservedbetweenthewallandthebackofequipment

②Groundoftheinstallationsitemustbelevel,whoseambienttemperatureshallnotexceed

30℃.③Theequipmentshallbeappliedunderanenvironmentof25℃.Ifthetemperatureis

toohigh,thentheairconditionerisrequiredforsolution.

④Fixthemachinewellwithfixedbolts.

⑤Goodventilationindoor.

⑥Don't’usethesamesocketwiththeplugofotherequipment,theplugandsocketmustbe

connectedsecurely.

⑦Pleasenotethatthepowerlineshallnotbetwistedorpressed.

⑧Ifthewireshallbelengthened,standardofthefeederlinewillbe230Vand15A,andthe

lengthenedpartshallnotexceed3m.

⑨Theequipmentisespeciallyusedfor208~230V，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.

⑩Theequipmentmustbeguaranteedtoreliablyground.

⑾Ifthepowerplugisequippedwiththeearthwire;pleasecheckitsoutputbeforeuse.

⑿If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



34/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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

①Theequipmentshallbeenergizedonlyaftertherefrigeratorhasbeenrestedformorethan

24h.

②The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℃,thento‐60℃afternormalstartupandshutdown.

Thencoolto‐80℃8hoursafteritsnormalstartupandshutdown.Observetherefrigeratorfor

normalstartupandshutdownforover24h,toproveitsnormalperformance.

③After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℃shallnotexceed1/3volume.Iftemperatureof

thearticlesstoredexceeds‐60℃,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℃).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freeze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.



35/88



【Specifications of LCD panel】

1. Unlock



Foradjustingthesettingvalues,firstlytheymustbeunlocked.Press“△”or ”▽”,temperature

settingvalueswillflash,press“△”or ”▽”,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.



2. Temperature setting



For“TemperatureSet”,thedisplayareawillflash,todisplaythetemperaturesettingvalue.Atthis

time,press“△”and“▽”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thatthevalueshavebeeninputtothecomputer,otherwisetheyareinvalid.Te mperature

settingrangewillbe‐10~‐86℃.



2

1

3



36/88



3. High Temperature Alarm

Whenset“HighTempe rature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℃whensettingthehightemperature



4. Low Temperature Alarm

Whensetting“LowTemperatureAlarm”,ifsettingtemperaturedisplayareaflashes,itindicates

thatthetemperaturesettingvalues.Atthistime,press“△”and“▽”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℃whensettingthehightemperature;

otherwisethesettingcan’tberealized.



37/88



【Indicating of working status of display panel】

1.Therefrigeratorwillenterstartingstatus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to

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.



38/88



【Indication of alarm status】

“Hightemperature”indicatinglamp:ifthelamplights,indicatingthealarmdisplaywhenthe

temperatureinsidetherefrigeratorishigherthanthesettingvalue.

“Lowtemperature”indicatinglamp:ifthelamplights,indicatingthealarmdisplaywhenthe

temperatureinsidetherefrigeratorislowerthanthesettingvalue.

“Overvoltage”lamplights,indicatingthevoltageislowerthan184V(95V)orhigherthan253V

(136V),buzzing.

“Toohighambienttemperature”indicatinglamp:ifthelamplights,indicatingtheambient

temperatureishigherthan32℃.

“Sensorfault”indicatinglamp:ifthelamplights,indicatingthesensorhasfaulted.

“Powerinterruption”indicatinglamp:ifthelamplights,indicatingtheinterruptionofpowerline.

“Dirtycondenser”indicating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℃(after5minuteslater),“dirty

condenser”indicatinglamplights,accompaniedbythebuzzeralarm.

“Lowbattery”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



39/88



ambienttemperature,whentheambienttemperatureexceeds38℃(excluding38℃),

“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.



40/88



【Setting of special functions】

1. Setting of password value

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“▲”and“▼”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canbedisplayedamong01,02,03……98,99.

2. Setting of start delay

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““△or”▽“.Thedefaultdelayis1

minute.

3. Calibration function

Undertheunlockstatus,press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℃andtemperature

ataspecialpointis‐75℃,then+5℃canbeinputtochangethedisplaytemperatureinto

‐75℃,thereforethecalibrationrangeis±5℃.

4. Control of condensate fan

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℃,thetwofanswillbeturnedon;

whenitislowerthan20℃(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



41/88



twofanswillbeturnedoff.

5. Requirements of battery control

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screen,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.

6. Meanings of fault codes

Whenthereisanytroublewiththesensor,“SensorFault”indicatinglamplights



①Whenthemainsensorhasanytrouble,actualtemperaturewillbealternatively

displayedonthedisplayscreenandthecodeisE2.



②When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E0.



④Whentheheatexchangesensorhasanytrouble,actualtemperaturewillbe

alternativelydisplayedonthedisplayscreenandthecodeisE3.



⑤Whentemperatureoftheheatexchangerpickedupbythesensor≥90℃,thealarm

displaysE4.

⑥Duringalarmtesting,whenthebatteryswitchisn’tconnectedorthebatteryislow,



42/88



displayfaultonthedisplayscreenisE5.



Alternatedisplaytime:theactualtemperaturedisplayis6secondsandfaultcodedisplay

is2seconds(sinceNov.2009).

7. Precautions

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standfor24

hoursafterthepoweruseafteryouinstallthefixedplace

7.2Theroomtemperatureshouldbekeptbelow28℃(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℃~‐80℃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display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.



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

45/88



⑦Whenheatexchangersensorsensesthetemperature≥90℃,alarmdisplayE4



Remarks:(Model‐25°Cand‐50℃heatexchangersensorsonoE3,E4,fault)

(Model:independentbackupsystemnoE0,E1,E3,E4fault)

Alternatelydisplaytime:theactualtemperaturedisplay6seconds,thefaultcodeisdisplayed

for2seconds.



Theheatexchanger

sensorprobesfoam

boxinsideofthe

bottom

Heat exchanger

sensor terminal



46/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℃,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medium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℃.

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

Howto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



47/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

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℃

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a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

Pressureswitch

Principle:whenpipelinepressureatpressureswitchexceeds2.1MPa,contactdisconnects,

lowtemperaturecabinetstopsoperation,pressurebeginsdecreasing;whenpressure



48/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℃.Theparametersofpressureswitchcannotbeadjusted.

Parameters:voltage220V,50Hz,contactcapacity:6A.



Freezingmedium

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.



Infusionoffreezingmedium

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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



49/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tubes.



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.



50/88



4. Fan parameters

Productmodel

Parameter

SL‐490C2W

SpecialNo.//

FanapplicationEvaporationfanCondensationfan

ManufacturerEBMEBM

Fanmodel//

Ratedvoltage230V230V

Inputpower10W10W

FantypeInduceddrafttypeInduceddrafttype

DimensionFanbladediameter200 Fanbladediameter230





51/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)208~230

Refrigerating

output(W)

3/4HPRatedfrequency(Hz)50

Inputpower(W)800WCurrent(A)3

Ratedvoltage(V)220CoolingmodeForcedwindcooling

ProductmodelDW‐86L626/628/728/828

CompressormodelGS26CLXVoltagerange(V)220~240

Refrigerating

output(W)

1HPRatedfrequency(Hz)50

Inputpower(W)927WCurrent(A)4

Ratedvoltage(V)220CoolingmodeForcedwindcooling



High temperature

level compressor

Low temperature

level compressor

Condensation fan Oil separator



52/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

Preparatorywork

1)refrigerant(R134A,R404A,HRA,HRB)

2)Hansenvalve

3)standardelectron(error≤±3g)

4)vacuumpump(≥4L)

5)Thepressuregauge(requirementscanbereadatthesametimea

high‐pressure,lowpressure)isshowninFigure1



Weldedopensystem

1)Thefailureofthesystemfromtheendoftheprocesstube,pipeclampcut



53/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,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



Vacuum

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≤3Pa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



hig

sea

Fig

4)l

thi

the

pre

as

【Note】

1)

to

pressur

lingmac

notseal

re4

owpress

gevalve,

rormor

periodr

timeto

ssuresta

hepress



sing4li

2hours

ethetim

inerefri

themou

urefort

pressure

etochec

quirest

oretha

eformo

redoes

ersorm

eandqu

eration

h),lowp

kingthe

gaugeis

kthema

atthe

oneho

ethano

otriseso

reofthe



54/88

icklyhigh

ighpres

essurec

timeto

henmai

hinesys

achinepi

r,andth

ehour,s

farbefor

vacuum

PICTURE1

tempera

ure(refr

ntinues

nehour

taineda

emisin

ckedup

ncontin

oevacua

reperfu

pumpis



3Pa

tureperf

gerantp

ofindti

afterthe

anegati

avacuu

hecase,

uetore

edopera

ion.

ecessary

usiontu

essureis

etoone

closeth

epressu

state,o

therwis

aininth

tionuntil

fortakin



a

eweldin

toohigh

hour.Se

pressur

reforon

servedi

re‐takin

negativ

suchtim

thetim



,



55/88

PICTURE2

PICTURE3

PICTURE4



nit:Pa



3Pa



56/88



Perfusionrefrigerant

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



57/88



refrigerantnecessary,usingtheaboveexportperfusion,theaboveinfusion

refrigerant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



58/88



PICTURE6



5. Infusion flow of freezing medium

①Theschematicdiagramofeachfreezingmediumcylinder

   

②Infusion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

prepareeverythinginadvancewhenyouaregoingtoinfuselowtemperaturelevelfreezing



59/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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.



60/88



【Refrigerant perfusion Details】

Type

High-temperature stage Low-temperature stage

The refrigerant (type /

amount) 1

The refrigerant (type / amount) 2

Improved date

R134A（g） R404A（g）R508B（g）R290（g）R23（g）

DW-86W100 / 510 140 20 /

DW-86W420 / 540 160 20 /

DW-86L288/286 / 540 210 20 /

DW-86L338 / 560 200 20 /

DW-86L386 / 570 235 20 /

DW-86L388 / 560 235 20 /

DW-86L486 / 580 265 30 /

DW-86L490 / 550 285 30 /

DW-86L626/628 90 810 305 30 /

DW-86L728 90 800 320 30 /

DW-86L828 80 685 315 30 /

DW-86W420

(old type)

180 420 / 20 140 2012.4.1

DW-86L288

(old type)

165 385 / 24 135 2011.1.10

DW-86L386

(old type)

95 525 / 28 162 2010.11.24

DW-86L388

(old type)

95 525 / 28 162 2011.1.12

DW-86L626/628

(old type)

180 420 / 30 180 2010.12.25

[Note] refrigerant type and weight of the nameplate subject shall not be mixed

or misuse of refrigerant.



61/88



【Troubleshooting】

Fault Analysis Maintenance Measures

1.High temperature level

compressor fails to start

1. User’s fuse burns out Change the fuse

2. Machine storehouse wiring connector plugs s are

damaged Change the connector plugs

3. Bas wire contact Check contact and make in good

condition.

4. Display panel and control panel connection failure Checking if it is due to bad

connection, otherwise, change it.

5. Relay, start capacitor or heat protector is

damaged Change the part.

6. Compressor fault Change the compressor

7. User’s voltage is too low Add a manostat

2.Low temperature level

compressor fails to start

1. Same reason as high temperature level

compressor

Same measure as high

temperature level compressor

2. Pressure switch is damaged Change the pressure switch

3. High temperature level compressor has poor

refrigeration

Repair high temperature level

refrigerating system

3.Fan does not rotate

1. Fan wiring is loose Checking the wiring

2. Fan blades are blocked by foreign matters Checking and clean them

3. Fan is damaged Change parts

4.High temperature in

cabinet

1. The temperature setting of outage is too high. Re-set computer board

2. Refrigerant leaks. Find leak location and make repair

welding. Infuse refrigerant again.

3.Temperature probe is damaged Change parts

4. Capillary tube or system is blocked by dirt\ greasy Clean the capillary tube or change

filter.

5. High ambient temperature Turn on air-conditioner，reduce

ambient temperature.

6. Condenser blockage Clean condenser

5.Display board displays

E0 E1 E2

1. Temperature probe short circuit or disconnect Checking the temperature probe

2.No temperature probe Install a temperature probe



62/88



Fault Analysis Maintenance Measures

6.Freezing cabinet noise is

high

1. Uneven placement Change the location of the

freezing cabinet.

2. When compressor is running, there is resonance

between pipeline and cabinet.

Clear up pipeline，or add a shock

pad under compressor

baseboard

To avoid resonance.

3. Interior fan and fan holder are fixed tightly Fix them

4. Compressor connecting bolts are loose. Screw the connecting bolts tightly.

7.Ultra-low-temperature

freezing cabinet does not

refrigerate

High temperature

level compressor

vent-pipe is not hot

High/low temperature level

pipe leaks

Find the leak location and make

repair welding

Compressor is damaged Change the compressor

Low temperature

level compressor

vent-pipe is not hot

Low temperature level pipe

leaks

Find the leak location and make

repair welding

Compressor is damaged Change the compressor

High and low

temperature level

compressor

vent-pipes not hot.

High/low temperature level

pipe leaks

Find the leak location and make

repair welding

Compressor is damaged Change the compressor

Low temperature

level compressor

protection

High temperature level pipe

leaks

Find the leak location and r make

repair welding

Low temperature level

refrigerant is infused too

much

Reduce infusion

Compressor does not'

start

Same analysis as the

non-start of high/low

temperature level

compressor

Same repair measure as the

non-start of high/low temperature

level compressor



63/88



Fault Analysis Maintenance Measures

8. Displayed temperature is

different from actually tested

temperature

1. The user's test instrument is not accurate Change the test instrument

2. Temperature probe of sensor is not accurate

under locked state，press down

"temperature" button until

temperature calibration value

displays flickeringly on the displaying

area of setting temperature, now you

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.

9 Temperature difference

between upper part and

lower part in refrigerator is

too large

If a user opens and closes the door frequently，

it is normal that temperature inside the box is

unstable, it is not fault.

Reduce the times of opening and

closing the door.

It is normal that there is temperature difference

between upper part and lower part in low

temperature cabinet.

10. it Displays that inside

temperature sometimes is

high and sometimes is

low(Sometimes more than

20 °, sometimes below zero)

Computer board has a failure，refrigerating

system can not work normally. Change the Computer board

11. Display E0 or other signs. Master sensor fault: E2，condenser- sensor

fault: E1，ambient temperature sensor fault: E0

Check if sensor contact is bad or

not，otherwise, change the sensor.

12. The start of high

temperature level

compressor is normal，but

Low temperature level

compressor protection is not

normal, does not start and

fails to refrigerate.

High temperature level refrigerant leaks Maintenance high temperature level

compressor.

13 Temperature can only be

maintained at about 50° for a

long time, and temperature

neither rises nor falls, and the

machine is operating

normally.

Low temperature level refrigerant leaks Infuse refrigerant

Refrigeration pipe line is blocked

After shutdown, open the cover to

balance inside and outside

temperature， then start up again.

Infuse refrigerant again，and change

the filter.

14. It displays that voltage is

high or low

Displayed voltage is the voltage at the user’s

socket，it is normal. /



64/88



1.E0alarmRingtemperaturesensorinputvoltage

≥ 4.9V,thesensoropen;≤0.1V,the

short‐circuit

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

2.E1alarmWhenthecondensersensorinput

voltage≥4.9V,thesensoropen;≤

0.1V,theshort‐circuit

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

3.E2alarmMainsensorinputvoltage≥4.9V,the

sensoropen;≤0.1V,theshort‐circuit

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

4.E3alarmHeatexchangersensorinputvoltage≥

4.9V,thesensoropen;≤0.1V,the

short‐circuit

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

4."E3",longpressto"beepcancel"after5seconds,"E3"alarm

willdisappearwhenthealarm.Thetemperaturestageoneminute

afterthestartoftheLowTemperaturestartup

5.Thecondenser

dirty,alarm

Condenserprobeperceptionof

condensertemperatureminusthe

differenceinambienttemperature≥

13°C(forfiveminutes),alarm

occurred

1.Openthefrontgrilleandcleanthefilter

2.Checkwhetherthecondenserprobeawayfromthecondenser

outlettooclose

3.ThecondenserprobetakeChanguoprocessingtape

6.Batterylow

alarm

≤ 10.5Vbatterypower,batterylow

alarm

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≤5V





65/88



【How to deal with High temperature alarm】



High-temperature stage fan is

normal

Low-temperature stage fan is

normal



Refrigeratortemperature≥hightemperature

alarmsettemperature(hightemperature

alarmsettemperature≥runsettemperature

+5°C)



Checkthepowerisnormal



Checkthefanandthe

controlcircuit

Checkthefanandthe

controlcircuit

Check the compressor

and control circuit

Check whether there is a refrigerant leakage, repair leakage

Hightemperaturealarm

Lightsflashing

CheckthedisplayboardLED

lightsandcontrolcircuit

After15minutesflashing

alarm,soundalarm

Checkthecontrolpanel

buzzerandcontrolcircuits

TestInputvoltagedisplayis

normal

Checkthecompressorand

controlcircuit

Low‐temperaturestage

compressorisnormal

High-temperature stage

compressor is normal



66/88



【How to deal with Low temperature alarm】



Low-temperature stage fan is

normal

Measuring the actual

temperature of the refrigerator

Low-temperature stage

compressor is normal

After 15 minutes flashing alarm,

sound alarm

Low temperature alarm Lights

flashing

Refrigerator temperature ≥ high

temperature alarm set temperature

(high temperature alarm set

temperature ≥ run set temperature +5 °

Check the display board

LED lights and control

circuit

Check the control panel

buzzer and control circuits

Check the compressor

and control circuit

Adjust the temperature

deviation

Checkthefanandthe

controlcircuit

Check whether there is a refrigerant leakage, repair leakage

【Points needing to pay attention】

1. Points needing attention during normal use-proper use

●When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.

●When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.

●Beforethearticlesareputintothestoragebox,firstlythetemperatureinsidetherefrigerator

mustbeconfirmedtohaveadequatelydropped,thenputthearticlesintoitinbatches,to

avoidtemperaturerise.

●Temperature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.

●A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.

●The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.

●Afterthestorageboxhasrunforaperiod,alayeroffrostwillbeformedontheinnerwalland



68/88



innerdooroftherefrigeratorbody.If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.

●Prior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.

●There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.

●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.



69/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.

Powerwireofthestorageboxisequippedwith3‐wire(earthing)plug,meeting16Astandard

3‐wire(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.

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notbeearthedviagaspipe,watersupplypipe,telephonelineorarrestor.

Becausetheaboveearthingwillproduceelectricshockorotherdangers.

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.

Theequipmentonlycanbeinstalledbythequalifiedtechnicianormaintenancepersonnel.

Otherwiseelectricshockorfirewillbecaused.

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.

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cause



70/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.

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.

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.

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,and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.

Anyelectricalpartsorswitchsuchaspowerplugshallnotbetouchedwithwethands;

otherwisetheelectricshockwillbeproduced.

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



71/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.

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.

Theglovesshallbewornduringrepair,toavoiddamagingthehandsbythesharpedgeor

corner.

Thefilternetshallne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.

Theplasticbagsshallnotbeapproachedbythechildren,becauseitwillpossiblyproduce

suffocationaccident.

WhenCo2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notexceed45degree.

Don’tpourthewaterontheequipmentdirectly,otherwisetheelectricshockorshortcircuit

willbecaused.

Theusershallnotdismantle,repairor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.

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.

Oncethestorageboxisdisconnectedfromthepower,itshallbeconnectedagainfiveminutes



72/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.



73/88



3. Points needing attention during normal use-disposal of special circumstances

Iftheequipmenthasanyfault,pleasecheckthefollowingfaultypointsbeforemaintenance:

Theequipmentcan’tbestarted

●Checkthepowerisnormallyconnectedorthemainsswitchisswitchedonornot?

●Isthevoltageistoolow?

●Istheretoomucharticlesstoredinthestorageboxonetime?

Badcooling

●Istheambienttemperaturetoohigh?

●Theinsideandtheoutsidedoorareopenedtightly?(Frostbetweentheboxbodyandthedoor

sealwilldamagethesealingofdoor).

●Isthefilternetofthecondenserblockedbydirt?

●Isthetemperaturesettingiscorrect?

●Isthestorageboxfarawaythedirectsunshine?

●Isthestorageboxclosetoheatsource?

●Aretherubbercoverandheatinsulatingmaterialusedbythetestingthroughholeplaced

correctly?

●Is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).

●Isthestorageboxinstalledonthesolidground?

●Doesthecasingofstorageboxtouchanyobject?

●Isthestorageboxsupportedwithhorizontalsupports?

●Isthestorageboxinlowtemperaturerunningstatus?

●There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.

●Pleasecheckwhetherthenoiseisfromthecompressor(noiseoftheultralowequipment’s

compressorisbiggerthanthehouseholdproducts).

●Tapping:Itmaybecausedbytheurgentcoolingandshrinkageofthepartsinsidetheequipment;



74/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.





75/88



【Other maintenance and repair】

1. Clean storage box

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

cleanedonceamonth.



2. Clean condenser filter screen

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.



3. Clean filter screen with water.

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.



76/88



4. Defrost inner wall

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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.



5. Battery maintenance

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



77/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suspended

particulatesaroundtheequipment,whichmaybeharmfultoyourhealth.



78/88



【FAQ】

1. Common Faults Analysis and Maintenance Measures



①Question: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.



②Question: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is5~8℃,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.



③Question: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;



④Question:Auserhasset‐86℃,whyitrisesupto‐82℃？

Answer:Toensuretheservicelifeofmachine,ourproductsaredesignedasthefollowings:

whenambienttemperatureishigherthan32℃,ifsettingtemperatureislowerthan‐82℃,it

willreturnto‐82℃,ifambienttemperatureislowerthan32℃(including32℃),itwillreturn

tooriginalsetting;



79/88



⑤Question:WhyisitdisplayingE0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.



⑥Question:IfthemachineismovingwhenIopenitsdoors,whatshallI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.



⑦Question: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refrigerator.

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.



2. Alarm of battery low electric quantity:

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



80/88



6,itshallbeover7.5V)，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;



3. Alarm of dirty condenser:

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℃(exceed32℃inearlierstage),atthistime,dirtycondenser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℃,atthistime,themachinewillalsooccurthe

phenomenonofdirtycondenseralarm;

Deposalmethod:reducethemachine’s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.



【Used Spare Parts Photo Gallery】

DW-86L628

SnPartcodeSparesNameqty picture

Whether

wearing

parts

10070701061Filterdryer1



20070700606

pressurecontrolswitchfor

2ndstage

1



30070701865Suctionaccumulator1



40270200538Outergasketforouterdoor 1



Y

50270200322BInnergasketforouterdoor 1



Y

60074091319controlboard1



Y



70070101872duplexall‐roundcaster1



80074091318Displayboard1Y

90074091225

Condensertemperature

sensor

1



100074090884Ambientsensor1



Y

110070204295Coverforaccessport1



120070204827Innerdoorhandle1



Y

13/Defrostshovel1



140270800385

Outergasketforinnerdoor

(Interiordoorassembly)

1



Y

160270800385

Innergasketforinnerdoor

(Interiordoorassembly)

1



Y

170070401235Batterypowerswitch1



Y

180070106373Innerdoorhinge1



Y

190070107087Outerdoorhinge2



Y

200070107112Outerdoorhandle1



210074091430A

Rechargeablebatteryof

12VDC

1



220070

230074

240270

25

260074

270074

280074

290074

00552

91183

00027



90871

90857

91167

Oilsep

Cabinette

control

Aircooled

Doorswitch

system

Ccontactor

Fanforl

(220V

Fanforhi

20V/60Hz)1

compressor(

（dan

arator

perature

sensor

00

ondenser

forbackup

ontrol

(220V/60Hz)

wstage

60Hz)

ghstage

&22&25&2

220V/50Hz)

oss）



1

4

1

2

1



Y



300024

310070

320074

00070

15591

90752

Powerr

compressor(

Catchassem

mech

Circuit

layfor

220V/60Hz)

blyforlatch

nism

reaker



1



Y



【Testing Date】



CoolingRate

SNModelPowersupplyAmbienttempCoolingtime(fromambienttemp

to‐80℃)min

1DW‐86L288220‐240V/50Hz

25℃±3

≤360

2DW‐86L388220‐240V/50Hz≤420

3DW‐86L486

220‐240V/50Hz

208‐230V/60Hz

115V60Hz

≤420

4DW‐86L628

220‐240V/50Hz

208‐230V/60Hz

115V60Hz

≤450

5DW‐86L728220‐240V/50Hz

208‐230V/60Hz≤480

6DW‐86L828220‐240V/50Hz

208‐230V/60Hz≤500

7DW‐86L338220‐240V/50Hz

208‐230V/60Hz≤360

8DW‐86L388A220‐240V/50Hz≤360

9DW‐86W100220‐240V/50Hz

115V60Hz≤300

10DW‐86W420220‐240V/50Hz≤360

11DW‐86W490220‐240V/50Hz

208‐230V/60Hz≤420

CoolingRate

Ambienttemp

Thethirdfloor

centertemperature



Temperatureofthecoolingsystemparts



Temperatureoftheparts

snmodelPowersupplyAmbient

temp

Coolingsystemtemperature

H‐INH‐OUTL‐INE‐INE‐OUT

1DW‐86L288220‐240V/50Hz

25℃±3≤‐32℃≤

‐32℃

≤

‐32℃

≤

‐86℃

≤

‐85℃

2DW‐86L388220‐240V/50Hz

3DW‐86L486

220‐240V/50Hz

208‐230V/60Hz

115V60Hz

4DW‐86L628

220‐240V/50Hz

208‐230V/60Hz

115V60Hz

5DW‐86L728220‐240V/50Hz

208‐230V/60Hz

6DW‐86L828220‐240V/50Hz

208‐230V/60Hz

7DW‐86L338220‐240V/50Hz

208‐230V/60Hz

8DW‐86L388A220‐240V/50Hz

9DW‐86W100220‐240V/50Hz

115V60Hz

10DW‐86W420220‐240V/50Hz

11DW‐86W490220‐240V/50Hz

208‐230V/60Hz



Inspired living

HaierMedical&LaboratoryProductsCo.,Ltd.

Room403D,BrandBuilding,HaierIndustrialPark,No.1HaierRoad

QingdaoChina



Website:www.haiermedical.com

Haier Freezer DW 86L388 P020130723364441210402

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