Haier BD-478A User manual

BD-478A
Freezer
Service Manual
Features
Door lock for safetystorage
High pressurefoam coverfor efficientTemperature
preservation.
Adjustablethermostat.
Superior insulation.
Efficientdefrostedstorage
Designedfor cafeterias restaurantsand hotels
Haier Group
ManualNo.:BD-478AEdition:20051201
BD-478A
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Contents
1.Contents .1
2.Product Code Illumination and SeriesIntroduction
2
3.Features ... 3
4.Specifications 4
5.SafetyPrecautions(including Warning and Cautions) ...5
6.Net Dimension ....7
7.Installation and AccessoryParts . 8
8.Partsand Functions 12
9.SystemFlowChart 13
10.Function Schedule 14
11.Circuit Diagram 15
12.MaintenanceServiceand TroubleShooting
1.SystemTroubleshooting 16
2.Common freezer problems 28
3.Serviceand technicalrequirementsof R134a freezer 30
4.Application and maintenanceof freezer 33
5.Procedure and toolsrequired for evacuation and Charging 38
6.FreezersNoise 40
7.NationalStandard for noise 49
8.Measuring technologyof freezer performanceparameter 51
13.Exploded View 58
14.List of Parts 59
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PRODUCTCODE ILLUMINNATIONAND SERIES INTRODUCTION
Product Code Illumination and SeriesIntroduction
BD-- □□
AB CD
A:Thefirst letterof FREEZER”inChinese spelling.
B:Thefirst letterof FREEZER”inChinese spelling.
C:Capacity. (Unit:litre).
D:Improve Series Number.
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FEATURES
Features
Door lock for safetystorage
High pressurefoam coverfor efficientTemperature
preservation.
Adjustablethermostat.
Superior insulation.
Efficientdefrostedstorage
Designedfor cafeterias restaurantsand hotels
Lowpowerconsumption20%less thantheothersimilar
freezers
Importedhighqualitycompressorandcondenser,large
freezing capacity, 1.5times morethenregularfreezers
Freezingquick anddeepfreezefunctionsare2timesfasterthen
regularfreezers
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SPECIFICATIONS
Specifications
Model BD-388A BD-478A
Capacity(L) 388 478
Power Supply(V/Hz) 220V~/50Hz 220V~/50Hz
Unit Dimension (W*D*H) 1420*715*810 1690*715*810
Unit Weight (Kg) 72 78
BoxDimensions(W*D*H) 1495*765*870 1765*765*870
BoxWeight (Kg) 84 91
Container Quantity(40HC’) 66 57
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SAFETYPRECAUTIONS
SafetyPrecautions
Readalloftheinstructionsbeforeusing thisappliance.Whenusing
thisappliance,alwaysexercisebasicsafetyprecautions,including the
following:
1.Use thisapplianceonlyfor itsintendedpurpose as describedinthis
uses and careguide.
2.Thisfreezermust beproperlyinstalledinaccordancewiththe
installationsection.Instructionsbeforeitisused, Seegrounding
instructionsintheinstallation section.
3.Neverunplugyourfreezerbypuling onthepowercord,Always
grasptheplug firmlyand pull straightoutfromtheoutlet.
4.Repairor replace immediately,allelectricservicecordsthathave
become frayedorotherwisedamaged, Do notuseacordthat
shows cracksor abrasion damagealong itslength,theplug orthe
connector end.
5.Unplug yourfreezerbeforecleaning orbeforemaking anyrepairs,
Note: Iffor anyreason thisproduct requires service,we strongly,
recommend that acertifiedtechnicianperformtheservice.
6.Ifyouroldfreezerisnotbeingused, werecommend thatyou
removethedoorand leavetheshelvesinplace;thiswillreduce the
possibilityofdanger tochildren.
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SAFETYPRECAUTIONS
SafetyPrecautions
7. Thisfreezer shouldnotberecessedor built-inanenclosed
Cabinet. Itisdesignedfor freestanding installation only
8.Do notoperate your freezer inthepresence ofexplosive fumes.
9. Do notrefreezefoods, whichhave beenthawedcompletely.
10.Do notuse anyelectricaldeviceoranysharpinstrumentin
defrosting your freezer.
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NETDIMENSION
NetDimension
Ha
LW
H
Model BD-388A BD-478A
Unit Dimension (W*D*H) 1420*715*810 1690*715*810
Dimension (Door open) 1420*715*1470 1690*715*1470
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INSTALLATIONAND ACCESSORYPARTS
Installation and AccessoryParts
Unpacking Your Freezer
1.Removeall packagingmaterial;thisincludesthefoambaseandalladhesive
tape holding the freezer accessoriesinside and outside.
2.Inspectandremoveanyremainsofpacking,tape orprintedmaterialsbefore
powering on the freezer.
Adjusting Your Freezer
1.Yourfreezer isdesignedforfreestanding installation only.It shouldnotbe
recessed or built-in.
2.Placethe freezer on afloor strong enough tosupport it fullyloaded.
3.When movingthefreezer,nevertiltitmorethan a45-degreeangle.Thiscould
damage the compressor and the sealed system.
4.Ifthe freezer istilted letitstandinan uprightposition for atleast24 hoursprior
toplugging.Thisistoallowthe refrigerant tosettle.
·ProperAirCirculation
l Toassureyourfreezer worksatthemaximumefficiencyitwasdesignedfor,
you shouldinstall it inalocation where there isproper aircirculation,
l Plumbing and electricalconnections.
l The following are recommended clearancesaround the freezer:
Sides ..2”(50mm)
Top. 2”(50mm)
Back ..2”(50mm)
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INSTALLATIONAND ACCESSORYPARTS
Installation and AccessoryParts
l Donot over fill freezer for proper internalaircirculation.
Electrical Requirement
l Makesure thereisasuitablepower Outlet(220V)withpropergrounding to
power the freezer.
l Avoidtheuseofcutting offthe thirdgrounding,thisisadangerouspractice
sinceitprovidesno effectivegrounding for the freezerand mayresultin
shockhazard.
Install Limitations
l Donotinstall yourfreezer inanylocation notproperlyinsulated or heatede.g.
garage etc,
l Selectasuitablelocationfor the freezer onahard evensurfacesawayfrom
directsunlightorheatsourcee.g.radiators,baseboardheaters,cooking
appliancesetc,Anyfloor unevenness shouldbe corrected.
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Operating Your Freezer
INSTALLATIONAND ACCESSORYPARTS
Installation and AccessoryParts
Oncethefreezerisinitsproperplace,plugitinanelectricaloutlethaving 220
volts.
Setthetemperature,onthetemperature contrail knob.”1”being the warmestand
“6”being the coldest. Initiallysetthetemperature on”3”.Placefood insidethe
freezerAfterusing thefreezer for24hourssetthe freezertoyourdesired
setting.
Incaseyou unplug your freezer or experiencean electricaloutage, allow5
Minutesbefore plugging it backin.
(Note:If thefreezerhasbeen placedinahorizontalortiltedpositionforany
period of timewait 24 hoursbefore plugging the unit in.)
Adjustabletemperaturedial:
Yourfreezerwill automaticallymaintainthetemperaturelevelyou select. The
temperaturelevelyouselect. Thetemperaturecontroldialhas6settingsplus
0.”1”isthe warmest,”6”isthecoldest.Turningthe dialto0stopscooling the
freezer.Setthedialto “3”andallow24hourstopassbeforeadjustingthe
temperature toyour needs.
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INSTALLATIONAND ACCESSORYPARTS
Installation and AccessoryParts
Food StorageBasket
YourFreezerhas1or2removablebasket.Itallowsyou tostorefoodmore
accessiblyor you can removeit if not needed.
Defrosting and Draining TheFreezer
·Defrost wheneverthe frostbecomes5MM thick.Neveruseasharpor
metallicinstrumenttoremovethefrostasitmaydamagethecooling
coils.(Apunctured coil will void the warranty)
·Turnthetemperaturecontrolto0positionand unplug theunit.Fordraining,
placeatraybeneaththeouterdrainplug.Pullout thedraindialand rotateit
sothatthearrowpoints downward.Thiswill letthewater flowoutintothe
tray.
·Removethe drainplugfromtheinsideofthe freezer.Defrostingusually
takes afewhours. Todefrost fasterkeepthe freezer dooropen. Whendone,
pushthedraindialinandturnthe arrowtotheupposition.Re-plugthe
drainpluginside thefreezer compartment.Note:monitorthecontainer
under the drain toavoid overflow.
·Wipetheinteriorofthefreezer and replacetheelectricalplug in the
electrical outlet.
·Rest the temperature control tothe desired setting.
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SYSTEMFLOWCHART
SystemFlowChart
The refrigeration systemofdirectcooling single-systemfreezers
belongstothe categoryofasingle-temperature and single-control
refrigerating systemwithonlyoneevaporator and iscontrolled bya
singletemperature control.
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FUNCTIONSCHEDULE
Function Schedule
Setthetemperature,on the temperature contrailknob.”1”being the
warmestand “6”being thecoldest.Initiallysetthetemperature on”3”.
Placefoodinside thefreezer .After using the freezer for 24 hoursset
the freezer toyour desired setting.
Incaseyou unplug your freezer or experiencean electricaloutage,
allow5
minutesbefore plugging it back in.
(Note: If the freezer hasbeen placed inahorizontalor tilted position for
anyperiod of timewait 24 hoursbefore plugging the unit in.)
Adjustabletemperaturedial:
Your freezer will automaticallymaintainthetemperature levelyou
select.Thetemperature levelyouselect.The temperature controldial
has6settingsplus01.”1”isthe warmest,”6”isthecoldest.Turning the
dialto0stopscoolingthefreezer.Setthedialto “3”and allow24 hours
topass before adjusting the temperature toyour needs.
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CIRCUITDIAGRAM
Circuit Diagram
Brief description ofprincipleaboutBD-318A/428A:
Brief description ofprincipleaboutThermostat:
When the temperature inthe freezer ishigher and reachesthe
value for starting the machine,the thermostatwill be closed,the
compressor will run;When the temperature inthefreezer islower and
reachesthe valuefor closingthe machine,the thermostatwill be open,
thusthe compressor will be stop running.
MAINTENANCESERVICEAND TROUBLESHOOTING
Maintenance Service and TroubleShooting
12.1SystemTroubleshooting
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12.1.1Servicing freezer
(1)Check thewholecircuitoffreezer, iftherearewireconnections
cameoff, anywires broken, or ashortcircuit.
(2) Check theinsulation ofthewholefreezer.Atnormal situation,
theresistance isgreaterthan2mebohms;ifitisless than2
mebohms, please make afurthercheck ofthefreezerresistance.
Set thevoltmetertoR1Ohm position, putthetwovoltmeterleads
pencilsintoLand Nterminalsrespectively, watchtheindication
ofodometer. Thenormal valueisseveral Ohm totensofohm. If
theresistance iszero, meansthat thereisashortinthefreezer
circuitor thereisashortcausedbyabadcompressor or fan
motor. Thereason shouldbefound outand repaired. Ifthe
resistance istoo bigor infinite, thismeansthat thereisbroken
circuit, please check and solve it.
Afterthe abovechecks, the freezerwill not haveany
electrical problemand you can switchpoweron forfurther
completelycheck.
MAINTENANCESERVICEAND TROUBLESHOOTING
MaintenanceServiceand Trouble Shooting
12.1.2Reasonsofelectricityleakageoffreezer
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(1) Leakageofcompressor:mainlybecause ofseriousvibration,
themotor coilofcompressorcontactswiththeshell,thecoatof
enameledwirewillcomeoff somewhereandconnect withshell.
Otherreasonsmaybeovervoltage,insufficientofvoltage,
adverse circumstances (temperaturetoo high,ventilation and
heat radiationtobad)forfreezer,thermalprotectionunitoutof
order,etc.Theywillmake themotor coil overtemperature,
insulation materialloose,insulation isdamagedthenelectricity
will occur.
(2) Leakageofmotorconnectionterminals:theconnection
terminalsoffullyenclosedcompressoraremadefromhigh
temperaturesodaglass sinteredceramics,around theterminals
arefilledwithahighpolymer.Theterminalsand insulation
materialmusthave thesamelinearexpansioncoefficient,thefor
requirementbetweenterminalsand theshell ismorethan0.5
millionohm. Thereason ofterminalleakageisthat sodaglassis
brokenorthereareconductive materialssuchas water,dirt,etc.,
adheredtoterminals.
MAINTENANCESERVICEAND TROUBLESHOOTING
Maintenance Service and TroubleShooting
Ifelectricityleakageoccursoutsidethecompressor,pleaseuse
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tetrachloromethaneoralcoholtocleanit.Iftheleakageoccursin
theinnerofcompressor, itneedstobechanged.
(3) Leakageoftemperaturecontroller:becauseoftoolonga
periodofservice ortoohigh temperature,ortoomuchdirt,ortoo
high humidity,theremaybeelectricityleakage.Ifithas been
definedthat thereisleakageoftemperaturecontroller,please
change.
(4) Leakageofstartingrelay:duringmountingandrepairing,
screwofrelayleadiseasytocontact theshell andleakagewill
thenoccur.Ifyou suspect therelayisbad,checkit.Ifthereis
leakage,please make theconnectionsagainand leave apiece of
insulation paperunderthescrew.
(5) Leakageoffan:because oftoo highhumidityoffreezer
environmentor abadfancontrollingunit,thefanisburnedafter
longtimeoperationand thuscauses leakage.Usingvoltammeter
tomeasuretheinsulation resistance betweeneachrespective
connection terminalandthefreezerbody,iftheresistance istoo
little, meansthereisleakagecausedbyhumidity;iftheresistance
Iszero,meansthefancoil isburnedorshort-circuited.Please
changethefan.
MAINTENANCESERVICEAND TROUBLESHOOTING
Maintenance Service and TroubleShooting
12.1.3Troubleshooting observation
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(1) Atnormaloperationconditions,thetemperaturearoundthe
surface offreezerevaporator isnearlythesame;thethickness of
frost layerissimilar.Ifthereisno frost atthesurfaceof
evaporator (bedtypefreezerat allofitsinnerwall),oronlyasmall
partat theupper,conclusioncanbemadethattheoperationof
refrigerationsystem isnotnormal, therefrigerantisinsufficientor
thereisleakage.
(2) Check thesystemtubing and make surethereisnoleakage,
especiallyat thejointconnections.Refrigeranthas good
permeability,and italsocontainsalittlerefrigerantoil.Ifthereis
leak, therewill betraces ofoil at theleak points.
12.1.4Troubleshooting bysounds
(1) Whenthefreezerisworkingnormal, high-pressureliquid
refrigerantflowsintothelow-pressureevaporatorvia
acapillarytube, agas flowing sound and waterflowing sound can
beheard.Openthefreezerdoorand access totheevaporator,you
canhearthesound.Ifthereisno soundorthereissoundalittle
nowand then,theremustbeleakageofsystemrefrigerantor
insufficientcharge.
MAINTENANCESERVICEAND TROUBLESHOOTING
Maintenance Service and TroubleShooting
(2) Afterswitching on power,Listentotherunning sound ofthe
compressor whetheritisnormalor not.Whetheror nothear
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normalrunning sounds.Ifthereisheavybuzzthat meansthe
motor has notbeenstartednormally.Ifthereisbumpsound,this
meansthat thesuspendedspring inthecompressor isbroken
and thecompressor isrunning intilt.Whenthese mattersoccur,
please changecompressor.
12.1.5troubleshooting bytouch
(1) Touchthecoverofcondenser,aftercontinuousoperation,
theupperpartofthecoveristhewarmest;thetemperatureof
lowerpartissimilartoroomtemperature.Itstemperatureis
relative toenvironmenttemperature.Thetemperatureinwinteris
lowandthecondenser’stemperatureislowtoo,andthereisonly
asmallpartwarm. Insummer,thetemperatureishighandthe
temperatureofcondensercoverishigh too,and thewhole
condenseriswarm.
(2) Thetemperatureofhigh-pressureexhaust pipeishigh,when
touching withyour hand, insummeritishot;inwinteritisalso
hot. Thetemperatureoflow-pressuregas inlet pipeislow. In
summerthereisdewat thepipewall and itwill feel cool when
touching;whentouching inwinter, itwill feel cooler.
MAINTENANCESERVICEAND TROUBLESHOOTING
Maintenance Service and TroubleShooting
(3) ThecovertemperatureofTheevaporator canbeas lowas
-30℃itwillfeelstickywhentouching.Ifyou’dlike totouch,
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