HTW HTW-AT-O-200VA1 Operating manual

USER AND INSTALLATION
MANUAL
HEAT PUMP WATER HEATER
VA1
HTW-AT-O-200VA1 / HTW-ATS-O-200VA1
Thanks for choose our product.
Please, read carefully this manual
before use the product
ENGLISH

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Dear Users,
Hello! We sincerely thank you for choosing our air source heat pump water heater. Please
note that only the fourth part of this manual can be operated by users, the rest must be done by
professionals. Or it will affect the machine’s normal use and performance.
Before you install and use this product, please read this manual carefully, since it will be great
help for installation and operation, and to avoid damage or accident caused by incorrect use.
Thanks in advance for your cooperation.
The information is subject to change without prior notice.
WARNING:
1. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
 similarlyqualiedpersonsinordertoavoidahazard.
2. This appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge if they
have been given supervision or instruction concerning use of the appliance in a safe way
 andunderstandthehazardsinvolved.Childrenshallnotplaywiththeappliance.Cleaning
and user maintenance shall not be made by children without supervision.
3.Inordertoavoidahazardduetoinadvertentresettingofthethermalcut-out,thisappliance
must not be supplied through an external switching device, such as a timer, or connected to
a circuit that is regularly switched on and off by the utility.
4. The product’s installation and maintenance must be done by professionals and users
cannot install and maintain by themselves.
5.Whentheenvironmenttemperatureisbelow0ºC,pleasedrainthewateroutofallthepipes
if the machine is not working or no power supply.
6.Clean the water evaporator ns regularly, otherwise it will affect the machine’s normal
operation. Turn off the power when cleaning.
7. Do not use the machine to heat groundwater, seawater and other hard water, otherwise it
will affect the heat transfer performance and damage the heat exchanger and compressor
assembly.
8. Details of type and rating of fuses; (see main report).
ATTENTION
The damages caused by the above operations are not covered by warranty.

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Contents
PART 1:
TheCharacteristicsandOperationalPrinciples............................................................................................... 4
PART 2:
CautionsofUsingtheHeatPumpWaterHeater ............................................................................................. 5
PART 3:
The Installation of Heat Pump.................................................................................................................................... 7
PART 4:
Instructions of Usage and Daily Operations of Heat Pump.................................................................... 14
PART 5:
Repair and Maintenance of the Heat Pump Water Heater..................................................................... 16
PART 6:
CommonMalfunctionsandSolutions................................................................................................................. 19
PART 7:
After-SalesService ......................................................................................................................................................... 22

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PART 1. The Characteristics and Operational Principles
Heat pump water heater is one of the most modern water heater machines with the highest
energyefciencyratiointheworld.Theoperationalprincipleofheatingistoabsorbheatfrom
the air based on the changing status of the refrigerant in the pipe system, and then release
heat into the water so the storage water’s temperature increases, so as to heat the hot water.
This product is suitable for domestic use, enterprises and institutions, service business and
other industries, providing hot water for shower and washing.
Characteristics
High-Efciency, Energy-Saving
This product consumes little electric power. It absorbs a large number of free thermal energy
fromtheairwithhighheat-collectingefciencyandlowoperationalcost.Comparedwiththe
traditional electric water heater, the machine can save energy by 70% or above.
Environmental Friendly
This product consumes natural energy, with no air pollution, no smoke emissions and no
harmfulgasemissions.Ithaszero-pollutionsandisabsolutelyenvironmentalfriendly.
Safe and Reliable
This product’s operation separates the water and the electricity, excluding any potential safety
problems of explosion, combustion, electric shock, poisoning etc.
Convenient-To-Use
Thisproducthastheelectricity-assistantfunction,soitisnotinuencedbycloudy,rainyor
snowyweather,nomatterdayornight.Itcanproducehotwaterefcientlyintheenvironment
ranging--15ºC~-43ºC.
Intelligent Control
Thisproducthasmicro-computerunittocontrol,easytooperateandwithautomaticmemory
function when power supply interrupts. It is no need to operate specially by person. Besides,
theelectricity-assistantfunctionistogetherwithanti-dryandanti-over-high-water-temperature
protection.
Stand Wear and Tear
Thecompressor’scorepartisofhigh-qualitywithstrongreliableperformanceandlongservicelife.
Operational Principle
1. AirSourceHeatPumpWaterHeater’sOperationalPrinciplesandInstructions

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The refrigerant which is low temperature and low pressure should be breathed into the
compressor to become high temperature and high pressure gas. Then it will exchange heat
with water in the condenser and become liquid. The water keeps absorbing the heat and the
temperature is rising. The high pressure liquid will go through throttling device and evaporator
to become the low pressure gas again. Then the refrigerant will run again and again the above
way so as to heat water.
2. ThePrincipleandInstructionofElectricity-AssistantHeatingPipe
Electricity-assistantheatingpipetransferstheelectricalenergyintothethermalenergy,from
which water will absorb constantly and the temperature rises. When the temperature reaches
thesettingtemperature,thetemperaturecontroldevices(whichisonthePCBboard)willshut
offalternatively,thentheheatingpipestopsworking.Iftheheateroccursdry-burningandover-
high-temperaturephenomenon,theprotectiondeviceswillshutoffimmediatelyforprotection.
PART 2: Cautions of Using the Heat Pump Water Heater
●MakesuretoinstallYlteratthewaterinletentranceduringtheinstallation.
●Removethe plugofcondensed water outlet exitandkeep it unblocked beforeusing the
heat pump.
●Whennishedtheinstallation,pleasecheckagainbeforellinginwaterandsupplyingpower.
●Beforeusingtheheatpump,makesurethatonePPRconnectingpipenoshorterthan1.5m
has been installed to the inlet water entrance.
■ Please check if the following accessories are complete.
Note: If the accessories list updates as products improve, there will not be further notice.
 Sopleaserefertotheactualaccessorieslist.
Part Name Qty Pic
(Just for reference.) Descriptions
User Manual 1 Please use this part during
the installation and using.
Y-TypeFilter 1Please use this part during
the installation.
SafetyValve 1Please use this part during
the installation.
Electricity Guard 2 Please use this part during
the installation.

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■ Power Supply Requirement
●Wiringworkshouldbedonebyofcialqualiedelectrician,andallworksshouldmeetthe
electric appliances safety requirements.
●Thesupplyingwiresforthewaterheatermusthaveearthwire,whichshouldbeconnected
to the reliable outside earth wire. Besides, the outside earth wire must be effective.
●Itmustprovidethepowerinlinewithratedparametersfortheheatpumpwaterheater.
●Accordingtothenationalrequirementsforelectricappliances,thereshouldbeanelectrical
leakage protector for the heat pump.
●Theinstallationshouldbeinlinewiththenationalrulesofthewiring.
●Whenconnectingtothepowersupply,thereshouldbeaatleast3mmall-poledisconnect
 deviceawayfromtheall-poleelectricshock.
●Ifthepowerwiringisbroken,itshouldbereplacedbythemanufacturer,themaintenance
 departmentorotherprofessionals.Duringthereplacement,thezerowireandtherewire
 shouldbecorrespondedwiththezerowireterminal(N)andtherewireterminal(L),make
sure that the connecting is reliable.
●Note:Itisnotallowedtodisconnectortakeapartthegroundwireofpowersupplyunder
 anycircumstances;itispreventedtousedamagedwiresandswitches.Youshouldreplace
it immediately once it is damaged.
■ Safety Instruction
●The heat pump is designed to offer suitable hot water to the users, only applying to the
described usage.
●Donotuseorstoregasolineorotherammable,explosivegasesorliquidsneartheheat
pump water heater, otherwise it may cause dangers.
●Foryourpersonalandotherpeople’ssafety,pleasedonotputanythingnearthewind–outlet
mouth of the heat pump.
●Childrenarenotallowedtoplaywiththeheatpumpinordertoavoiddangers.
●Pleaseturnoffthepowerwhenmaintaininordertoavoidaccidents.
●Be sure that refrigerant in the refrigeration system has been drained completely before
taking the welding maintenance, because the refrigerant will produce harmful gases if meets
 reandcouldeasilycausere.
●Installtheanti-electricwallmanufacturedbyourcompanytothewateroutletexitifnecessary
■ To Change the Installation Site
If you need to change the installation site of heat pump, please contact your dealer or our
local customer service department.

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PART 3: The Installation of Heat Pump
■ Basic Installation Tools and Materials Needed
■ Installation Instructions
1.Machine Moving
●Thismachineisquiteheavysothatitrequirestwoormorepeopletomoveandinstall,orit
may cause in personal injury or other accidents.
●Pleasetransferthemachineasitsdeliverystatus,donotdisassembleitbyyourself.
●Inordertoavoidscratchesanddeformationonthesurface,pleaseaddprotectionboard
over the surface of the machine which may contact hard objects directly.
●Becarefulnottotouchthewindvanewithyourhandsorotherobjects.
●Donottransferthemachineastheinclinationisover45°.Donotlaydownthemachine
 recumbentlyontheoor.
2. Installation Location Selection
●Themachineshouldbeinstalledintheroom.
●Pleasechoosethelocationwhichcanbeartheheatpump’sweight,willnotcausemuch
vibration and noise when hanging on it, and have good ventilation. The air outlet place
 shouldavoidfacingthewinddirectionandremainthehorizontallineplace.Ifthemachined
is installed in the place vulnerable to rain, it is essential to take the necessary measures to
prevent rain and avoid rain erosion.
●Pleaseselecttheplacewhereeasilyconnectingtothewaterpipesandelectricpowersuply.
● Pleaseselecttheplacewherewatercansuccessfullyexhaustoutofthereliefvalvewhenitworks.
●Pleaseselecttheplacewherewaterexhaustedoutofthereliefvalvewillnotsplashonthe
 woodoororfurniture.
●Wheninstalling,pleaseleavespaceforinstallationandmaintenanceshownasthebelow
drawings. There should be no obstacles at the machine’s wind outlet within the range of
600mm.
●Wheninstalltheheater,theinclinationshouldnotmorethan5°.
NAME QTY Usage
Pipe wrench 2 pcs To connect the water pipes.
Straightscrewdriver
Phillips screwdriver 1 pc per each To disassemble the battery box and connecting wires.
Wire scissor / stripper 1pc To trim thread and strip wire.
Percussive drill/wrench 1/2 pcs Toxthemachine’sanchorbolt.
Ball valve 1 pc To install the tank inlet water pipes.
Waterpipe,exiblejoint Depends on the actual need. PPR pipes, PAP pipes.
Hot water pipe
insulation material
Depends on the length of the
heat pipe. To insulate.

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3. Installation/Usage Requirements (Please refer to the installation diagrams)
●Theheatpumpshouldbeplacedstably(horizontal),andwaterpipes,waterlters,safecare
 andone-wayreliefvalveshouldbeinstalledaccordancewiththenationalstandards.
●Waterinjection:Turn onone ofthe water outletand water inletvalve.Itmeans injection
 nishedwhenthereiswatercomesoutoftheoutlet.Youcanswitchontheheaterafterthat.
●Thewaterqualityshouldmeetthefollowingstandards:Hardness(CaCO3)≤200milliliter/liter,
 Chlorideions≤50milliliter/liter,PHvalue6.5~8.5,andyoushouldcleantheinnerwater
tank regularly.
●Ifyouremovethesedimentdirtoftheinnerwatertankregularly,itwillimprovetheworking
 efciency.Sewerage/drainagemethod:turnoffthepowerandinletwatervalve,openoneof
the water outlet and sewage valve, and then the sewage and sediment will come out. Turn
 offthesewagevalveuntildischargeofthewaternishes.

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4. The Connection of Pipe System
●ConnectionFigureofPipeSystem
ATTENTION
●Donotuseironpipetoinstalltheheater.Thewatersystemshouldadoptnewpipeswhich
 meetdrinkingwaterstandards, suchasCPVC/PPRpipeor PB,Pleasedo notusesmelly
 PVCpipe.
●Installthewaterpipes,connectorsandotherpartsastheabovegure.Iftheinstallation
 environmentisunder0ºC,allpipesshouldbewithinsulationtreatment.
●Pleasekeepthecondensedwateroutletandsafetyvalveoutletcleanandunblocked.
5. Pipes Connection Instructions
(1) Installation requirements of water inlet pipes
Screw threads are G3/4” (nipple). The lifetime of pipes and pipe components cannot
be shorter than the lifetime of the machine, and they should be able to withstand high
temperatureof80ºC,soastoavoiddamage.
(2) Installation requirements of safety valve connection pipes
ScrewthreadsareG1/2’’(internal),makesurethewatercanowoutofthesafetyvalve
andthewateroutletpartshouldbeinstalledstraightdownwards.Afternishinginstallation,
pleasemakesurethatalltheconnectingdrain-pipesshouldbeconnectedtoeachother
onebyonedownwardsinfrost-freeenvironment.
(3)InstallationrequirementsofY-lter
ScrewthreadsareG1/2’’.Thedirectionofinstallationshouldbeconsistentwiththewater
inletdirection,whilethedrainoutletoftheltershouldbedownwards.
(4)Thetank’ssupplywaterpressureranges0.15MPa~0.5MPa.Ifthewaterinletpressure
is always lower than 0.15MPa and much water quantity required, you need to add a booster
pump at the water inlet so as to keep the water pressure no lower than 0.15MPa; if the
water inlet pressure is always higher than 0.5MPa, you need to add a reducing valve of
0.5MPa at water inlet pipe so as to make sure the safety use of the tank.

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6. Electrical Wiring
ATTENTION
●Thewaterheater shoulduse specialpowercord,whichshouldberequiredas thebelow
table. The voltage of power should also be suitable with the rate voltage requirement.
●Thepowersupplycircuitshouldhavegroundwire,whichshouldbeconnectedwithoutside
ground reliable device effectively.
●Cableconnectionmustbedonebyprofessionaltechnicalpersonstrictlyaccordingtothe
electrical diagram.
●It should set up earth leakage protection according to the relevant national electrical
equipment standards.
●It should use all-pole disconnection device which has at least 3 mm contact separation
when connecting the power.
●Itneedsdouble-checktheelectricalcircuitbeforeconnectingtothepowersupply.
●Itshouldnotdisconnectordisassemblethegroundwire,norusebrokencablesandswitches
 underanycircumstances.Ifyoundoutanybreakage,youmustreplaceitassoonaspossible.
(1) PowerSpecications
(2) Earth Leakage Protection
power cord ground wire earth leakage protection
Power Connection Diagram
≤30m
Power
PowerCordDiameter
(mm2)ManualSwitch(A)
EarthLeakage
Protection
Naught
Wire
Length
≤30m
Ground
Wire Capacity Fuse
HTW-AT-O-200VA1
HTW-ATS-O-200VA1 230V~50Hz ≥1.5 ≥1.5 20 15 30mA Below 0.1 sec
Items
Model

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7. Trial Operation
(1) Precautions required before trial operation
●Thewaterheatershouldbeinstalledandcompletedcorrectly.
●Pipingandwiringshouldbecorrect.
●Powersupplyvoltageshouldmatchwiththeratedvoltagethewaterheaterrequires.
●Drainageshouldworksmoothly.
●Theinsulationshouldbeimproved.
●Thegroundwireshouldbeproperlyconnected.
●Thereshouldnotbeanyobstaclesattheairinletplace.
●Makesureallthepipesaredrainedandemptyandallthevalveshavebeenturnedon.
(2) Operation with power
●Makesureallthecontrolswitchesarenormalaswellasallfunctionbuttonsaregood.
●Observeifthehotwatersystemworksproperlyandthetemperatureofoutletwaterisnormal
or not.
●Whenthesafetyvalveisworking,pleasecheckifitcandrainoutwatersuccessfully.
●Thereisn’tanyabnormalvibrationorsoundduringthemachine’soperation.
8. Technical Parameters
Air source heat pump water heater
Model HTW-AT-O-200VA1/HTW-ATS-O-200VA1
RatedVoltage/Frequency 230V~50Hz
Electric heating rated power 2000W
Heat pump rated power 610W
RatedCapacity 200L
Waterproof rating IPX4
Net weight 95kg
Noise ≤60dB(A)
Dimension Φ580x1860
Refrigerant R410A/900g
Refrigeration system
allows working
overpressure
Exhaust side 4.4MPa
Suctionside 1.6MPa
Water pipeline
system
Outlet water temp DN20
Inlet pipe Dia DN20
Outlet pipe Dia DN20
Drain pipe Dia DN20
Rated.pressure 0.7MPa
Max.pressure 0.7MPa
Noted: The test conditions for rated parameters are dry bulb temperature of 20 degrees,
Wet-bulbtemperatureof15degrees,inletwatertemperatureof10degrees,outletwater
temperature of 52degrees.

– 12 –
ATTENTION
The parameters in the above table are only for reference. When the contents of this table differ
from those of the nameplate on the machine, please refer to the nameplate.
■ TheRelationsofthePartsCOPandtheAmbientTemperature

– 13 –
■ Electrical Diagram
ElectricalandGasConnectingExplanationDiagramforModelHTW-AT-O-200VA1/HTW-ATS-O-200VA1
ATTENTION
This diagram is for reference only. When the content of the above diagram differs from that on
the machine, please refer to the electrical diagram within the machine.
P

– 14 –
PART 4: Instructions of Usage and Daily Operations of Heat Pump
■ Instruction of Buttons
Note: It shows the temperature of tank water in unattended operation, while it shows no value
instand-bystatus.Whenthetankwatertemperatureindicatorashes,itmeansthemachine’s
disinfection function is on.
■ Operation Instruction
(1) Turn on / off the Machine
Withthepowerconnection,pressthebutton“On/Off”,thentheheatpumpwillturnon.Press
thebutton“On/Off”again,theheatpumpwillturnoff.
(2)ModeSelection
Whenthemachineison,youcanselectthemode“automatic”,“heatpump”or“assistance”
(electrical assistance).
Note: heat pump mode and assistant mode cannot be used at the same time.
●Whenunder“automatic”or“heatpump”mode,thecompressorhas3-minutestartingdelay
protection function.
●In orderto avoid starting frequently, when it reaches the setting temperature and stops,
 theheatpumpwillrestartwhenthetemperatureoftankwater4ºClowerthanthesetting
temperature.
●Whenunder“automatic”mode,turnontheheappumpandletitheatinguntilthetank
 watertemperaturereaches52ºCandstop,thenselectthe“assistant”modetoincreasethe
 watertemperatureto70ºC.
●Whenthedisplayison,pressthemodebuttonforatleast3seconds,andthenpress▲or▼
button referring to the follows:
 F1:thetemperatureofdischarge;
 F2:thetemperatureofenvironment;
 F3:thetemperatureofpipes;

– 15 –
 F4:thetemperatureofsuction;
 F5:thestatusofcompressor;0meanscompressoroff,1meanscompressoron.
 F6:thestatusoffanmotor;0meansmotoroff,1meansmotorrunsatlowspeed,2means
motor runs at high speed;
 F7:thestatusoffour-wayvalve;0meansfour-wayvalveoff,1meansfour-wayvalveon.
(3)TemperatureSettingofWaterTank
Whenthemachineison,youcanadjustthetemperatureofwatertankbypressing▲or▼
button,whichmakesthetemperatureincreasingordecreasingby1ºCThehighesttemperature
of“heatpump”modeis52ºC,whiletheoneof“automatic”modeand“assistance”modeis
both70ºC.
(4)ClockSetting.
When the power is on, press the clock button for a long time and enter into the clock setting
status.Youcanadjustthecurrentdatabypressing▲or▼button.Pressthetimertochoose
theoneyouwanttoadjustand“minutes”and“hours”willashinthetimezonebyreturns.You
canadjustthe“minutes”withpressing▲or▼button.Afternishingsetting,youcanpress
the clock button again or wait for 30 seconds, and then the clock setting will switch to home
page.
Intheprocessofsettingtime,ifyoudon’tpress▲or▼buttonwhenthedataashingformore
than 30 seconds, then the machine will automatically exit and maintain the current setting time.
(5)TimerFunction
Inthehomepage,pressthetimerbuttononce,thenitwillenterthetimersettingstatus.You
canadjusttheglitterydataonthedisplaybypressing▲or▼button.Thesettingorderwillbe
asfollows:thersttimer→thesecondtimer→thethirdtimer→nish.Foreachtimersetting,it
isrequiredtosettheturn-ontimerst(thetimerindicatorwillbeon).Duringthesetting,please
press the timer button to choose the data you want to adjust, and it will show on the display
ashours→minutes→temperature→hours.Pressthetimerbuttontosettheturn-offtimeand
temperature(thetimerindicatorwillbeoff).Pressthemodebuttononemoretimetoconrm
thedataandnishthesetting(onlywhenthethirdtimerisnishedsetting).
If you press the mode button for a long time during the setting, the data will not be kept and it
will go back to the home automatically.
(6) Delete the Timer Records
During the setting, press the timer button for a long time until it goes back to the home page
automatically, and then all the timer records will be deleted.
(7) Trace the Timer Records
Activate the display and press the timer button, and then enter the status to trace the timer
records. Press mode buttons to change over different records.
Kindly reminder:
◊ You canselect the timeslot from12a.m. to5 p.m.asthe turn-ontimetowarmupthe
machine, because the temperature will be higher and can absorb much heat, which
 guaranteesgoodworkingefciency.
◊ Itissuggestedtochooseoff-peakpowerconsumptionandusethepumpintheevening,
because most of the regions have cheaper electric charge for night.
◊ Choosetheheatingtimeandwatertemperatureasneeded,becausetherewillbeheatloss
 thoughtheheatpumphasheatinsulationfunction.Besides,long-timeinsulationwillmake
the machine keep running and consume more electricity.
◊ Innormaluse,openanyoneofwateroutletexitswillcomeouthotwater,andcoldwaterwill
 berelledautomatically.

– 16 –
◊ Whenthemachinewillnotbeusedforalongtime,itissuggestedtoturnoffthecontroller
switch, and disconnect the power plug. Please note that the current timer setting may fail
(because it needs working with battery). Reset it when you use the pump next time.
◊ Controlboardarenotallowedtoinstallinhigh-temperatureplacessuchasbathroom,soas
to prevent moisture from affecting the normal work .
◊ Thetemperatureofwatertankissetat52ºCinfactory.Thehigherwatertemperatureyou
 setthelowerenergyefciencyratio(copvalue)itruns.
◊ Iftherstoneortwotimersaresetandyouwanttosetmore,youneedtodeletethemand
reset all of the timers.
◊ Thismachinehasauto-self-sterilizedfunction.Thisfunctionwillbeactivatedwhenreaches
 certaincircumstances,eventhemachineisinstand-bystatus.Thetargetwatertemperature
on the display will keep glittery during this function is on.
WARNING
◊ Duringtheoperation,whentheevaporatorcoil’stemperatureislowertoacertainextent,
the evaporator may be frost. At this time, the system will automatically defrost. After that, it
will recover and run automatically.
◊ Thewaterproducedbyheatpumpshallnotbeusedasdrinkingwater.Pleaseaddcoolwater
to the hot water before using, so as get the proper water temperature and avoid scalding.
ATTENTION
Pleasestopoperationandunplugthemachineifoccursthefollowingcircumstances.Contact
our dealers or maintenance personnel and do not repair the heat pump water heater on your
own,becausewrongrepairmaycausecasualtiesorre.
●Fusesandprotectorsoftendisconnect.
●Powercordandpowerswitchheatabnormally.
●Badsmellduringoperation.
●Leakageoftheheatpumpwaterheater.
PART 5: Repair and Maintenance of the Heat Pump Water Heater
When using the heat pump water heater, please check the unit’s operation regularly. If it can
providelong-termandeffectivemaintenancetotheheater,theunit’soperationreliabilityand
service span will be improved.
1.Cleanthewaterlterregularlyandmakesurethatthewaterwithinthesystemisclean,avoid
 damagesduetothewaterlter’sblocking.
2.All safety protection devices have been set correctly and completely in the factory, so please
do not adjust on your own.
3.The heat pump should be kept in clean and dry places with good ventilation so as to achieve
 good heat exchange. Please clean the lter regularly according to different extent of the
environmental pollution.
4.Toensurethelong-termworkefciencyofthewaterheater,itisrecommendedtodrainthe
inner water out totally and clean one time every six months, remove accumulative sediment
during the operation.

– 17 –
Operation steps are as follows:
(1) Turn off the power.
(2)Turn offthe cold-water inletvalve,andthen turnon the hot-waterfaucet(as thebelow
picture shows).
(3) Connect the drain mouth to an appropriate outfall with a hose, (The minimum durable
temperature of the host should not be lower than 80ºC, if the host does not meet these
requirements,pleaseopenthecold-waterinletvalveandthehot-wateroutletfaucetuntilthe
water is not hot).
(4) Open the water outlet and drain all the tank water out. If needed, clean the inner tank
several times to remove all sediment (it depends on the cleanliness of the water outlet).
(5)Turnoffthewateroutlet,thenrellthetankandreconnecttothepower.
5.Please check regularly whether the unit’s power supply and the wiring of electrical systems
 arermornot,whethertheelectricalcomponentshaveanyabnormalphenomenonornot.
If yes, please ask your local dealer or contact us to replace and repair the machine.
6.Please check whether the safety valve of water system is working properly or not, so as not
to affect the unit’s heating capacity and the reliability of the unit’s operation.
7. If you shut down the heat pump for a long time, please remove the water of pipes system and
 thetank,thencutoffthepowerandputaprotectioncover.Beforere-operatingthemachine,
 pleaseconductacomprehensiveexaminationofthesystemrst,llwithwaterandthen
restart the machine.
8.Each water heater is equipped with an anode rod to protect the water tank from corrosion,
but the anode rod will also be corroded slowly. The corrosion rate depends on the local water
quality. We recommend that you check the anode rod every six months and change a new
one if the anode rod runs out. Please contact the dealer or special technical center about
detailed information.

– 18 –
9. Totheregionswhosetemperatureisbelow0ºC,pleasebesuretoinsulatethewaterinlet
 andoutletpipes.Ifnecessary,installpipeheatingdevicetoavoidpipesfreezing.
10. When the machine is breakdown and the user cannot solve the problem, please contact
the local service center or dealer to send servicemen to repair the machine promptly.
ATTENTION
Guidelines for replacing the anode protection rod:
1. Turn off the power and the water inlet valve.
2. Turn on the hot water valve or faucet, so as to
decrease the pressure of inner tank.
3. Open the water outlet; drain the water until it is
lower than the magnesium rod position.
4. Follow the instructions of the left diagram,
remove the magnesium rod with a socket or
wrench.
5. Replace the new anode protection rod: new
anode rod threads need to be coated with
suitable screw sealant and place the groove
joints in magnesium rod with original seals or new
specicationseals.Finally,assemblemagnesium
rod.
6.Whennishedtheinstallation,heatthewater
to52ºC,checkwhetherthereisleakagearound
the installation position of magnesium rod during
the process.
● Itneedstopullthehandleofdrainvalveonce
every six months to remove the deposit calcium
andconrmthedeviceisnotclogged.Itsoutlet
water temperature may be high, so be careful to
avoid scolding.
● Thewatermaydripfromthedischargepipeof
thepressure-reliefdeviceandthatthispipemust
be left open to the atmosphere.
● The pressure-relief device is to be operated
regularly to remove lime deposits and to verifythat
it is not blocked.
● In case of that drain pipes are freezing in
winter, which causes accidents, please handle
the outlet pipes with insulation protection.

– 19 –
PART 6: COMMON MALFUNCTIONS AND SOLUTIONS
Form1MalfunctionCodeTable
Malfunction
Code Malfunction Name Reason Solution
P1 High pressure switch
failure
1. High pressure switch is
broken
2. The system is blocking
and water tank sensor is
fallen off, resulting in water
temperatureover-high.
3. Refrigerant is too much.
4.Thereisnon-condensable
gas in the refrigerant
system.
1. Replace the high
pressure switch.
2.Checkandxthesystem
with replacing the water
tank temperature sensor
correctly.
3. Eliminate excess
refrigerant.
4.Eliminatenon-
condensable gas.
P2 Protection for high
discharge temperature
1. Refrigerant is not
enough.
2.Thereisnon-
condensable gas in the
refrigerant system.
1.Increase the amount of
refrigerant.
2.Eliminatenon-
condensable gas.
E0 Communicationdata
transmission failure
A open or short circuit
between circuit board and
display.
1.Fixtheconnectionline.
2.Replace the connection
line or display.
E2
Ambient temperature
sensor fault (open or
short circuit)
1. The sensor’s connecting
wire is open circuit.
2. The sensor’s probe is
fallen off.
3. The sensor’s wire is
short circuit.
1. Repair the wire.
2.Fixthesensorprobe
again.
3. Repair the wire, and then
rule out the breakdown.
E3
Coiltemperature
sensor failure (open or
short circuit)
1. The sensor’s connecting
wire is open circuit.
2. The sensor’s probe is
fallen off.
3. The sensor’s wire is
short circuit.
1. Repair the wire.
2.Fixthesensorprobe
again.
3. Repair the wire, and then
rule out the breakdown.
E5
Water tank
temperature sensor
failure (open or short
circuit)
1. The sensor’s connecting
wire is open circuit.
2. The sensor’s probe is fall
off.
3. The sensor’s wire is
short circuit.
1. Repair the wire.
2.Fixthesensorprobe
again.
3. Repair the wire, and then
rule out the breakdown.
E6
Discharge
temperature sensor
failure (open or short
circuit)
1. The sensor’s connecting
wire is open circuit.
2. The sensor’s probe is fall
off.
3. The sensor’s wire is
short circuit.
1. Repair the wire.
2.Fixthesensorprobe
again.
3. Repair the wire, and then
rule out the breakdown.
E7
Protection for high
temperature of return
gas
1. The sensor’s connecting
wire is open circuit.
2. The sensor’s probe is fall
off.
3. The sensor’s wire is
short circuit.
1. Repair the wire.
2.Fixthesensorprobe
again.
3. Repair the wire, and then
rule out the breakdown.

– 20 –
Form2CommonMalfunctions
Malfunction
Description Reason Solution
The machine does not
work.
1. Power failure
2. Power cord is loose.
3.Controlpowerfuseisbroken.
1. Turn off the power switch and
check the power.
2.Findouttheproblemandxit.
3. Replace the fuse.
The machine has low
Heating capacity
1.Refrigerantisinsufcient.
2. Water pipe’s thermal insulation
performance is poor.
3.Drylterisclogging.
4. The heat exchanger with air has
poor cooling.
1.Checkifthereisleakageand
note the standard quantity of
refrigerant.
2.Strengthenwatersystem
insulation function.
3.Replacethedrylter.
4.Cleanheatexchangerwithair.
The compressor does
not work
1. Power supply or the controller is
broken.
2. The compressor’s contactor fails.
3. The wire is loose
4. The compressor’s overheating
protection works.
1.Findoutthereasonandsolveit
accordingly.
2. Replace the contractor.
3.Findouttheloosepointandxit.
4. Identify the reason of
overheating and then turn on the
machine after trouble shooting.
The compressor works
noisily
1. Internal components are
damaged.
2.Frozenoilisnotenough.
1. Replace the compressor.
2.Addenoughfrozenoil.
The fan does not work
1. The capacitor is broken.
2. The screw is loose.
3. The motor is broken.
1. Replace the capacitor.
2. Tighten the screw.
3. Replace the motor.
The machine does not
produce heat, while the
compressor is working.
1. Refrigerant spreads out totally.
2. The compressor is broken.
1.Checkifthereisleakageand
fulllthestandardquantityof
refrigerant.
2. Replace the compressor.
Exhaustuepressureis
too high.
1. Refrigerant is too much.
2.Fluorine-waysystemcontains
non-condensablegas.
1. Expel excessive refrigerant.
2.Excludenon-condensablegas.
Suctionpressureistoo
low.
1.Drylterisblocked.
2. Refrigerant is too little.
1.Replacethedrylter.
2.Checkifthereisleakageandxit.