FlexPro AEH/18 Quick start guide

Airtowaterheatpump
OperationalInstructions
Model: AEH/18

General Specifications
Rated heating capacity: 18.4kW
Rated cooling capacity: 12kW (option)
Average heating input power: 4.6kW
Rated current: 9A
Hot water supply: 400 L/h
Water connection: DN25
Max outlet water temperature: 60°C
Noise: 55Db
Dimensions: 1120 x 490 x 1270mm
Packing Dimensions: 1200 x 520 x 1425mm
Weight: ~175kg
Recommended heating surface: 150 sqm
Power Supply: 220V or 380V
Compressor: COPELAND
Refrigerant: R407C
Hot water flow: 5000 L/h

Airtowaterheatpumpoperationmanual
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Heat Heat Heat Heatpump pump pump pumpcontrol control control controlinstruction instruction instruction instruction
Ⅰ、Summarize Summarize Summarize Summarize
Thecontrollerfirforsingle
or doublecompressor(singlephase&threephase) air source,directoutlet
hotwater or circulatingheatingtypeheatpumpwaterheater.Thecontrolsystemconsistsofmainboard,
controlpanel,thermostat(optional).
Ⅱ、Main Main Main Maintechnical technical technical technicalparameters parameters parameters parameters
1.Use Use Use Usecondition condition condition condition
Operatingvoltage:AC220～240V/380～410V±10%,50Hz～60Hz±1Hz
Operatingenvironmentaltemperature:-20～+75℃
Storetemperature:-30～+80℃
Relativehumidity:0～95％RH
2.Temperature Temperature Temperature Temperaturecontrol control control controlprecision precision precision precision: :::1℃
3.The The The Thecontrol control control controlboard board board boardcomplies complies complies complieswith with with withthe the the thefollow follow follow followrequirement: requirement: requirement: requirement:
□GB4706.1-1998“Householdandsimilarelectricequipment
’ ssafetypart1—currency
requirement
□GB4706.32-1996“Householdandsimilarelectricequipment ’ ssafety,heatpump, air
conditioneranddehumidifier ’ sspecialrequirement
□GB18430.1-2001“Steamcompressorcyclecoolingwaterheatpumpmachinesuitforindustryand
commerceusingandrelevantusing
□GB18430.2-2001“Steamcompresscyclecoolingwaterheatpumpmachine,householdandsimilar
purposecoolingwater(heatpump)units.”
□Anti-jammingdegreecomplieswithGB4343.2-1999
□PrintedCircuitBoardcomplywithGB4588.1andGB4588.2 ’ srule
Ⅲ、The The The Themain main main mainfunction function function functionof of of ofc cccontrol ontrol ontrol ontrolpanel panel panel panel
1111. ...Heatingand/orcoolingwaterfunction
2222. ...Show
Water tanktemperatures,presettemperatures,runningstate,outputstate,clockandsoon.
3. 3. 3. 3.Caninquireaboutevaporatorpipetemp,environmentaltemp,exhausttemp,returngastemp,outletwater
temp,returnwatertemp,currentofcompressor,electricexpansionvalveopening,errorcodeandsoon.
4444. ...Automaticallyrememberallparameters,ifpoweroff,andresumerunningautomaticallyafterpoweron.
5. 5. 5. 5.Clockworkonafterpoweroff,needn’treadjusteverytime.
6. 6. 6. 6.Turnon/offattwocertainperiodoftimewithin24hours.
7. 7. 7. 7.Supplyhotwaterattwocertainperiodoftimewithin24hours.
8. 8. 8. 8.Amendrunningparameterstobebestatallkindsofworkingcondition.
9. 9. 9. 9.Electricexpansionvalveiscontroledautomatically(accordingtothedegreeeofsuperheattoadjustintime)
10. 10. 10. 10.Automaticallydefrostingfunction(ithasdroppingwaterfunctionwhendefrosting)
11. 11. 11. 11.Forceddefrostingfunction.

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12. 12. 12. 12.Key-presslockedautomatically.
13. 13. 13. 13.Functionoftimelimitedviapassword
14. 14. 14. 14.HugeLCDwithbluebackgroundandwhitewordsshowing.
15. 15. 15. 15.Perfectprotectfunction(lackofphaseandwrongpahseprotectionof3-phasesupply,compressorover
currentprotection,highpressureprotection,lowpressureprotection,lackofwaterprotectionandsoon).
16 16 16 16.High,middle,lowwaterlevelsensortestshowingoncontrolpanel
17. 17. 17. 17.Functionofsupplywaterautomatically(cansupplywateraccordingtotemp,alsocansupplywaternot
accordingtotemp)
18. 18. 18. 18.Returnwaterfunction
19. 19. 19. 19.Anti-frostfunction
20. 20. 20. 20.Heatpumpcanindentifyautomaticallyandstartuptoheatwaterundertheconditionofwithoutcontrol
panel(orcontrolpanelisbroken)
Ⅳ、main main main mainboard board board board
1, 1, 1, 1,Control Control Control Controlboard board board boardinput input input input
Lowwaterlevelswitch(lead
or probe)middlewaterlevelswitch(lead or probe)
highwaterlevelswitch(lead or probe)Lowpressureswitch
highpressureswitchwaterflowswitch
W aterpressureswitchThreephaseAC-A,B,C
2, 2, 2, 2,Control Control Control Controlboard board board boardoutput output output output
Circulatingpump(contactcurrent20A)auxiliaryelectricheating(contactcurrent8A)
Fanmotor(contactcurrent8A)waterSuppyvalve(contactcurrent8A)
Compressor(contactcurrent20A)Fourwayvalve(contactcurrent8A)
CrankcaseHeating(contactcurrent8A)Returnwaterpump(contactcurrent8A)
Hotwatersupplypump(contactcurrent8A)
3,Control 3,Control 3,Control 3,Controlboard board board boardsimulation simulation simulation simulationsignal signal signal signalinput input input input
W atertanktemperature(rangeofmeasure:0-160dc),
Evaporatorpipecoiltemperature(rangeofmeasure:-30-110dc)
Returngastemperature(rangeofmeasure:-30-110dc)
Exhausttemperature(rangeofmeasure:0-160dc)
Environmentaltemperature(rangeofmeasure:-30-110dc)
Outletwatertemperatuer(rangeofmeasure:0-160dc)
Returnwatertemperature(rangeofmeasure:0-160dc)
Compressorcurrent(rangeofmeasure:0-30A)

Airtowaterheatpumpoperationmanual
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water
tem
perature
s e
t
tem
perature
1 2 3 4 5 6 7
8
2222，，，，Operate Operate Operate Operate
Controlpanelpower-on,buzzergivealongringing,LCDdisplayes,backgroundlightgivemicrolight,
now,thekey-pressarelocked, it isineffectivetotouchanykey.
2222．．．．1111Unlock Unlock Unlock Unlockkey-press: key-press: key-press: key-press:touch“power”key by fingerformorethan3seconds,afterhear“toot”sound,moveaway
finger,nowbackgroundlightgivehighlight,key-pressareunlocked,key-lockedsignaldisappear(60s
later,ifanykeyisn’ t pressed,keycanbelockedautomatically,key-lockedsignaldisplay).
2222 ．．．． 2222On/off On/off On/off On/off: :::Touch“power”key by finger,ifcontrolpanelisunderONstate,thenpoweroff,ifcontrolpanelunde r
OFFstate,thenpoweron.
2222．．．．3333Water Water Water Watertank tank tank tanktemperature temperature temperature temperaturesetting setting setting setting：Touch “▲” ， “settemperature”signalflashanddisplaythepreset
temperatureofwatertank,touch“▲”again,thepresettemperatureofwatertankincrease.Touch “▼” ，
“settemperature”signalflashanddisplaythepresettemperatureofwatertank,touch“ ▼” again,thepreset
temperatureofwatertankdecrease.Thesettingrangeofwatertankis20℃to60℃.
2222．．．．4444Definite Definite Definite Definitetime time time timesetting setting setting setting：Touch“timer”key,enterdefinitetimesettingstate.
Firstadjustthe“hour”ofthefirstperiodofdefinitetimeforpower-on,thentouch”timer”keyagain,then
adjustthe“minute”ofthefirstperiodofdefinitetimeforpower-on,touch“timer“keyagain,thenadjustthe
“hour”ofthefirstperiodofdefinitetimeforpower-off,touch“timer”keyagain,thenadjustthe“minute”ofthefirst
periodofdefinitetimeforpower-off.Touch“timer”keyagain,entertheseconddefinitetimesetting,theoperationis
thesameasthefirstdefinitetimesetting,untilfinishallthedefinitetimesetting,thenquitsetting.
Afterquitdefinitetimesetting, it displaytheandsignal.
ONOFF
2222 ．．．． 4444 ．．．． 1111Cancel Cancel Cancel Canceldefinite definite definite definitetime time time time ： Press“ timer “key
for3s,heara“toot”voice,thenmoveawayfinger,thendefinite
Ⅴ、ccccon on on ont tttr rrrol ol ol olp pppan an an ane eeel llli iiil llll lllu uuus ssst tttr rrrat at at ati iiion on on on
1111，，，，ccccon on on ont tttr rrrol ol ol olp pppan an an ane eeel lllp pppi iiic ccct tttu uuur rrre eee

Airtowaterheatpumpoperationmanual
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timesettingcanceld
2222
．．．． 5555Clock Clock Clock Clocksetting setting setting setting ： press“timer”keyfor3s,heara“toot”voice,presscontinuingly,afterpressthe“timer”keyfor8s,
whenhear“toot”voiceagain,thenmoveawayfinger,enterclocksettingstate,
Firstadjustthe“hour”ofclock,press“timer”keyagain,thenadjust“minute”ofclock,press“timer”key
again,thenfinishsettingandquitsetting.
Note:clocksettingjustcanbeoperatedundertheconditionofthereisn’ t definitetimeset.
2222 ． 6666Force Force Force Forcedefrosting defrosting defrosting defrosting ： aftertheheatpumpwaspoweronandthecompressorhasstarted,thenpress“ ▼” over8s,
whenheara“toot”voice,moveawayfinger,thenenterdefroststate,whenthetemperatureofcoil（evaporator ） o r
defrostingtimereachpresetparameter,thenquitdefrost.
2222．7777Cooling Cooling Cooling Coolingmode mode mode mode：Underheatingwatermode,press“▲”keyover8s,thenheara“toot”voice,entercooling
mode.Rangeofwatertemperatureadjusting:7℃-30℃，undercoolingmode,thenpress“▲”over8s,
enterheatingmode.
Parametersettingandinquiry（attachedtable1）
AAAA ：function function function functioninquiry inquiry inquiry inquiry
Underpoweronstate,press“setting”key,inquirycodeisfromA1toA9,ifsinglecompressorheatpump,
press“setting”keyagain,thenquitinquirystate,ifdoublecompressorheatpump,another9inquirycode
canbeinquired,from b1 tob9,press“setting”keyagain,quitinquirystate.Pleasecheckfollowingstable：
BBBB：function function function functionsetting setting setting setting
Underpoweronstate,press“setting”keyover3s,whenhear“toot”voice,moveawayfinger,
enterparametersettingstate,afterparameterset,press“setting”key,enternextparameter
setting,untilallthesettingofparametersarefinished,thenquitsetting.
Inquiry
code
Meaning(singlecompressor
Heatpump)
Meaning(doublesystCodeMeaning(doublesyst)
A1Coil(evaporator)temperatureCoil(evaporator)
temperature1
b1Coil(evaporator)
temperature2
A2ReturngastemperatureReturngastemperature1b2Returngastemperature2
A3ExhausttemperatureExhausttemperature1b3Exhausttemperature2
A4EnvironmenttemperatureEnvironmenttemperatureb4Environmenttemperature
A5OutletwatertemperatureOutletwatertemperatureb5Outletwatertemperature
A6ReturnwatertemperatureReturnwatertemperatureb6Returnwatertemperature
A70000b700
A8CompressorcurrentCompressorcurrent1b8Compressorcurrent2
A9Openingangleof
expansionvalve
Openingangleof
expansionvalve1
b9Openingangleof
expansionvalve1
ErDisplayoferrorcodeDisplayoferrorcodeErDisplayoferrorcode
SetcodeParameternamerangeInitial
/// W atertanktemperature
20℃─60℃50℃
L1 T empdifferentcebetweenwater
tankrealtempanddisplaytemp
0℃─15℃0℃
L2
T empdifferencebetweencompressorstard
restart
tempandpresetwatertanktemp
3℃─18℃5℃

Airtowaterheatpumpoperationmanual
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CCCC：Error Error Error Errorcode code code codedisplay display display displayand and and andalarm alarm alarm alarm：
L3Outletwatertempsetting(onlyforinstant
heatingmode)
35℃─99℃55℃
L4
W atertanktempupperlimitsetting
30℃─99℃60℃(swimming
poolheat
pumpis45℃)
L5environmenttempatwhich
electricheatingstartup
0℃─35℃
0（0meanno
electricheat）
L6Returnwatertemperture
30℃─65℃45℃
L7 T empatwhichcoolwatersupplyallowed
20℃─60℃20℃(20℃means
coolwatercan’tbesupplied)
L8Compressorcurrent0-48A0(0meansnotdetect)
h1Cycleofdefrost
20─99min
35min
h2 T empofenterdefrosting
-15℃─1℃
-1℃
h3Runtimeofdefrost5-20min10min
h4
T empofquitdefrosting
1℃─40℃
20℃
p1Cycleofelectricexpansionvalveregulating20-180S30s
p2Degreeofsuperheat
-8─15℃
0
p3Exhausttempallowedprotect
70℃─135℃90℃
p4Electricexpansionvalveopeningangle
whendefrosting
6-55degree50degree
p5Minopeningangleofelectricexpansion
valve
6-30degree15degree
P6Compensationofsuperheatdegree
0-12℃4℃
CodeDescriptionoffaultof
singlecompressorsystem
CodeDescriptionoffaultof
doublecompressorsystem
01Ewrongphase01Ewrongphase
02ELackofphase02ELackofphase
03E W aterflowswitch03E W aterflowswitch
05EHighpressure05EHighpressure1
06ELowpressure06ELowpressure1
07E07EHighpressure2
08E08ELowpressure2
09ECommunication09ECommunication
11ELimittime11ELimittime
12EExhausttemperaturetoohigh12EExhausttemperature1toohigh
13E13EExhausttemperature2toohigh
15E W atertanktempsensordamaged15E W atertanksensordamaged
16Ecoilpipe(evaporator)sensordamaged16Ecoilpipe(evaporator)sensor1damaged
17E17Ecoilpipe(evaporator)sensor
2damaged
18EExhaustsensordamaged18EExhaustsensor1damaged
19E19EExhaustsensor2damaged

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Ⅵ、function function function functiondescription description description description
1111．HHHHeating eating eating eating
1.1hydronicheating
1.1.1flowsheetofhydronicheating
poweron→waterlevelswitchtest→waterpressureswitchtest→cyclewaterpumpwork(16s)→waterflow
switchtest→fanwork（6s
） →compressorwork（whenlowwaterleveldisconnect，coolwatersupplyswitcho n,
compressor、fan、cyclewaterpumpwork.
1.1.2、Coolwatersupplycontrolling
（1）whenlowwaterlevelswitchdisconnected,coolwatersupplyswitchonandbeginsupplywater,cyclewater
pumpstartup,fanoff,compressoroff.
（2）whenlowwaterlevelswitchon,cyclewaterpumpon,fanon,compressoron,hydronicheatingbegin.
meanwhilewatersupplyvalvebegintosupplywateraccordingtothepresetwatersupplytempL7.：ifwater
tanktemperature≥L7 ， watersupplyvalveopen ， supplywater ； ifwatertanktemperature≤L7-5degree ， water
supplyvalveclose，stopsupplyingwater.
（3 ） afterhighwaterlevelcloseup,stopsupplyingwater.Ifhighwaterlevelhasclosedupbefore,when it disconnect
again,notsupplywateratonce, it willsupplywateruntilmiddlewaterleveldisconnect.
Notice:：ifL7=20℃,watersupplyisnotcontroled by watertemperature.
1.1.3、watertemperaturecontrolling
Rangeofwatertemperaturecontrolling：35-60℃，
1.1.4Runningcontrolling
ON
OFF
L2presetwatertemperaturewatertemperature
1.2Instantlyheating
21EEnvironmentsensordamaged21EEnviormnetsensordamaged
22EReturnwatersensordamaged22EReturnwatersensordamaged
23E23E
25E W aterlevelswitchdamaged25E W aterlevelswitchdamaged
26E26E
27EOutletwatersensordamaged27EOutletwatersensor1damaged
28E28EOutletwatersensor2damaged
29EReturngassensordamaged29EReturngassensor1damaged
30E30EReturngassensor2damaged
31E W aterpressureswitchdamaged31E W aterpressureswitchdamaged
32ECoolingwatertemptoolow32ECoolingwatertemptoolow
33E33E
34E34E
35ECompressorovercurrent35Ecompressor1overcurrent
36E36Ecompressor2overcurrent

Airtowaterheatpumpoperationmanual
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1.2.1Poweron→waterpressureswitchtest→openwatersupplyvalvetosupplywater→fanon→compressoron,
afterhighwaterlevelconnected,watersupplyvalveclose,ifwatertanktemperaturedoesn’
t reachpreset
temperature,cyclewaterpumpon,waterwasheatingtopresettemperaturecircularly,thenpoweroff.
1.3Supplywatercontrolling
（1)whenhigh 、 middle 、 lowwaterlevelswitchesalldisconnect,watersupplyvalvesupplywater,thencheckwa ter
pressureswitch,ifwaterpressureswitchisclosedup,thenfanon,compressoron,thermostaton,beginto
supplywateruntillhighwaterlevelswitchclosedup,thermostatandwatersupplyvalveclose,stopsupplying
water.
（2）ifhighwaterlevelswitchhavebeenclosedup,whenthehighwaterlevelswitchdisconnect, it willnotsupply
wateratonce, it mustuntillmiddlewaterleveldisconnect.Thenwatersupplyvalveon,fanon,compressoron,
thermostaton.
1.4 Water temperaturecontrolling
Rangeofwatertemperaturecontrolling:35-65℃ , whenpresettemperaturereach60℃ , ifwanttosetthewater
temperature＞60℃ , press▲keyover6s , whenhearinga“toot”voice , moveawayfinger , press▲keyagain,
nowthemaxwatertemperaturecanbesetat65℃.
1.4 .1 Runningcontrolling
ON
OFF
Lowwaterlevelhighwaterlevel
2222.Auxiliary .Auxiliary .Auxiliary .Auxiliaryelectric electric electric electricheating heating heating heatingcontrolling controlling controlling controlling
2.1 2.1 2.1 2.1Conditionofauxiliaryelectricityheatingstartup
A.underheatinghotwaterstate;
B.watertanktemperature+5℃≤presettemperature
C.watertanktemperature＜45℃;
D.environmentaltemperature≤L5
Alloftheaboveconditionsaremetatthesametime,theauxiliaryelectricheatingstartup.
2.2 2.2 2.2 2.2Conditionofauxiliaryelectricityheatingstop.
A.underforceddefrostingstate;
B.watertanktemperature≥presettemperature
C.watertanktemperature≥50℃
D.environmentaltemperature＞L5
A ny oneofaboveconditionsismet,theauxiliaryelectricheatingwillstop
3333、Defrosting Defrosting Defrosting Defrostingrunning running running running（attheconditionofparametersarenotchanged,thedefaultdefrostingprocessofsystemis
following，ifneedamending,thendefrostingwillbeaccordingtotheamendedmethod）
3.1、conditionsofenterdefrosting
A,cumulativeruntimeofcompressorreach35minuteswhenheating,andcontinuingruntimeover6minutes
B,evaporatorcopperpipetemperatureunderh2(theoriginalvalueis-1℃,changeable)；
IfbothA,Bconditionsaremet,thenenterdefrosting,frombeginningtotheendofdefrosting,LCDdisplay
defrostingsignal.(whendefrosting,cyclewaterpumpon,4-wayvalveon,compressoron,fanoff,thermostatoff)。
C,Runningstatewhendefrost:
Compressoroff,fanoff,postpone50s
, 4-wayvalveopen,postpone40sstill,compressoron,cyclewaterpumpon.
3.2、conditionsofquitdefrosting

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A:Evaporatorcoilpipetemperature≥h4(originalvalueis12℃
, changeable)
B:Defrostingtime≥h3(orgininalvalueis10minutes,changeable)
Note:anyoneofaboveconditionismet,Systemquitfromdefrosting,specificactionandtimesequenceas
followingchart:
C:Runningstate:compressoroff,fanon,postpone60S,fourwayvalveoff,postpone30sstill,compresoron,cycle
waterpumpon.
3.3forceddefrosting
Undertheconditionofpoweron,andcompressorstartuptoheatingwater, T ouch▼keyover8s,whenheara
“toot“voice,moveawayfinger,enterforceddefrostingstateatonce,whenforceddefrostingmeetpresettime or
presettemperature,systemquitfromforceddefrostingstateautomatically,enternormalheatinghotwaterstate.
4.Cooling 4.Cooling 4.Cooling 4.Coolingwater water water waterrunning running running running
Afterheatpumppoweron,touch▲keyforover8s,whenheara“toot”voice,moveawayfinger,entercooling
watermode,touche▲keyagainforover8s,whenhear“toot”voice,moveawayfinger,thenenterheathotwater
mode.
5555. ...Cycle Cycle Cycle Cyclewater water water waterpump: pump: pump: pump:
W aterpumpturnonwhenheatpumprunning,ifheatpumpstop,postpone30s,thenwaterpumpstop(ifselect
instantlyheatingmode,whenwatersupplyvalveandthermostatturnon,thencyclewaterpumpturnedoff, it just
turnonwhenthewaterintankneedtoreheat).
6.four 6.four 6.four 6.fourway way way wayvalve: valve: valve: valve:
4-wayvalveturnoffatnormalheatingwaterstate, it justturnonwhendefrost.Butifcoolingwater, it turnon.
7. 7. 7. 7.Water Water Water Watersupply supply supply supplyvalve: valve: valve: valve:
Referwatersupplycontrolling(whendefrosting,
it doesn’ t supplywater)
8. 8. 8. 8.crankcase crankcase crankcase crankcaseheating heating heating heating
Whenenvironmenttemperature<8℃ , crankcaseturnson,whencompressorstartup,crankcaseheatingstop.if
compressordon’ t runwithinonehour,crankcaseheatingturnson;Wheninvironmenttemprerature≥8℃ ,
crankcaseheatingstop.
9. 9. 9. 9.Return Return Return Returnwater water water watervalve valve valve valve: :::
Theconditionofreturnwatervalveopen
A.Lowwaterlevelswitchon
B.
Water tanktemperature≥L6+5℃
B.Returnwatertemperature≤≤L6
D.Thepresetintervaltimeofwaterreturnisreach.
Aboveconditionsaremetatthesametime,returnwatervalveopen.
Theconditionofreturnwatervalveclose:

Airtowaterheatpumpoperationmanual
P9
Whenretrunwatertemperature≥L6,returnwatervalveclose.
10. 10. 10. 10.Automatical Automatical Automatical Automaticalrunning: running: running: running:
Undertheconditionofnocontrolpanel
or controlpanelisdamaged,systemcheckabout 1 minute,confirm
thereisnotcontrolpanelenterautomaticalcontrolling.
Whenrunautomatically:
W atertankpresettemperature=55℃
Presetoutletwatertempofdirectoutletwater=50℃
Deviationvalueof W atertanktemprerature=0
T empdifferenceatwhichCompressorcanrestartaftercompressorstop=5℃
Periodofdefrosting=35minutes
T emperatureatwhichsystementerdefroststate=-5℃
Defrostruntime=8minutes
T emperatureatwhichsystemquitdefroststate=20℃
T emperatureatwhichelectricheatingstartup=10℃
Returnwatertemperture=45℃
W atersupplytemperature=40℃
Degreeofsuperheat=0℃
Noncheckcompressorcurrent.
Ⅶ、Protection Protection Protection Protectionillustration illustration illustration illustration
1、Pretectionofcompressorpostpones3minutes,bothcompressorturnonandoffneed3minutes.everytime,
compressorneeds3minutestorestartafter
it stoped.
2 、 Water flowswitchprotection(hydronicheatingsystemuse it ). Afterpress“power ” key, andcyclewaterpump
run,ifwaterflowswitchoff,thencompressorandfanoff.
3、Highexhausttemperaturepretection:whenexhausttemperature≥115℃andlast30s,systemconsider
temperationistoohigh,closeoutput,displayerrorcode,3minuteslatersystemcanrestart.
4 、 Highpressureprotection ： whenhighpressureswitchdisconnect3timeswithinanhour,displaypanelshowerr or
codeandalarm.Thencompressoroff,fanoff,cyclewaterpumpoff.Afterhighpressureswitchrecover ,
postpone3minutes,compressorrestart,Ifhighpressureswitchdisconnectover3timeswithinanhour,control
panellocktheerror,turnoff all outputsignal,andwillnotrestartwhetherpressureswitchwillrecover or not.
5、Lowpressureprotection.whenlowpressureswitchdisconnect3timeswithinanhour,displaypanelshowerror
codeandalarm.Thencompressoroff,fanoff,cyclewaterpumpoff.Afterlowpressureswitchrecover,postpone
3minutes,compressorrestart.Iflowpressureswitchdisconnectover3timeswithinanhour,controlpanelwill
locktheerror,close all outputsignal,andwillnotrestartwhetherpressureswitchwillrecover or
not..(Remarks:whendefrosting, or within 5 minutesaftercompressorstartup,systemdoesn’ t testlowpressure
switch)
6 、 Sensorerror:ifsensoroccureerror(brokencircuit or shortcircuit), all outputstop,andshowerrorcode.Sensorcan
restartaftererroedisappear.
7、Threephaseprotection：whendialswitch
1 selectnumberside, it hasthreephasetestfunction, it willtestthree

Airtowaterheatpumpoperationmanual
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phasesupplyassoonaspoweron.Iflackofphase
or wrongphase , systemwillenterthreephaseprotection,
turnoff all outputandshowerrorcode, it willrecoveronlywhentroubleremovaledandpoweronagain.
8、Anti-frostprotection:whenenvironmenttemperature≤5℃，ifcompressorunderstoppingstateover30
minutes,thencyclewaterpumpwillstartandrun30S.(cyclewaterpumpwork30sper30minutes)
9、 Water pressureswitchprotection:coolwatersupplymagnetvalveopen,aftercontrollerdetectedwaterpressure
switchofffor6scontinuingly,turnoff all output,showerrorcode,untillwaterpressureswitchon.Systemwill
restart3minuteslater
10 10 10 10、Compressorovercurrentprotection:aftercompressorstartedandrunsfor6s,testcompressorcurrent,if
compressorcurrent≥L8andlast6s,turnoff all output,iftheovercurrentiscaused by lackofphase,thenthe
controlpanelwillshowlackofphaseerrorcodeandalarm,systemwillrestartafterfaultremovaled.

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Ⅷ、single single single singlecompressor compressor compressor compressorheat heat heat heatpump pump pump pumpmain main main mainboard board board boardillustration illustration illustration illustration
Remarks:
Dialswitch 1 selectONsideissingle-phasesupply,selectnumbersideisthree-phasesupply.
Dialswitch 2 selectONsideiscommonheatpump,selectnumbersideisswimmingpoolheatpump.
Dialswitch3selectONsideisnon-online,selectnumbersideisonline..
Whenselectlinkage,iflinkageswitchon , thenpospone16s , cyclewaterpumpstart,then16slater , fanstart,
then16slater,compressorstart.
Dialswitch4selectONsideiscircularmode,selectnumbersideisstraightoutlet+circularmode

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Ⅸ、double double double doublecompressor compressor compressor compressorheat heat heat heatpump pump pump pumpmain main main mainboard board board board
Remarks:1：
Dialswitch 1 selectonsideis1phasesupply,selectunmbersideis3phasesupply.
D ial switch 2 selectonsideiscommon air sourceheatpump,selectnumbersideisswimmingpool
heatpump.
D ial switch3selectonsideishydronicheatingmode,selectnumbersideisdirectoutlet+hydronic
heatingmode.

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380V 380V 380V 380Vsingle single single singlecompressor compressor compressor compressorheat heat heat heatpump pump pump pumpwir wir wir wiring ing ing ingdiagram diagram diagram diagram
A
B
C
N
PE
COMP
KM1 FR1
FAN
PUMP
KM1 FR1
C
Crankcase
heater
red
blue
yellow
AB C
N
TH1 TH2 TH3 TH4 TH5 TH6 TH7
1
2
3
4
5 6
4wV
water flow
switch
TH7 TH6 TH5 TH4 TH3 TH2 TH1
power supply
3N380V~50Hz
high pressure low pressure
return water temp
return gas temp
outlet water temp
exhaust gas temp
environment temp
evaporator coil temp
water tank temp
N
HP P L
2.6-3.2MPa 0.15-0.3MPa
control panel
electric expansion valve
1234
ONDIP
COMP
PUMP
4wV
fan
electric heater
water supply valve

Airtowaterheatpumpoperationmanual
P14
220Vsingle single single singlecompressor compressor compressor compressorheat heat heat heatpump pump pump pumpwir wir wir wiring ing ing ingdiagram diagram diagram diagram
L
N
PE
COMP
KM1
FAN
PUMP
KM1 FR1
C
Crankcase
heater
red
blue
yellow
AB C
N
TH1 TH2 TH3 TH4 TH5 TH6 TH7
1
2
3
4
5
6
4wV
water flow
switch
TH7 TH6 TH5 TH4 TH3 TH2 TH1
POWER
SUPPLY
1N220V~50Hz
high pressure low pressure
return water temp
return gas temp
outlet water temp
exhaust temp
environment temp
evaporator coil temp
water tank temp
N
HP P L
2.6-3.2MPa 0.15-0.3MPa
control panel
electric expansion valve
1234
ONDIP
comp
PUMP
4wV
fan
electric heater
supply water valve
C
CRS

Airtowaterheatpumpoperationmanual
P15
380V 380V 380V 380Vdouble double double doublecompressor compressor compressor compressorheat heat heat heatpump pump pump pumpwir wir wir wiring ing ing ingdiagram diagram diagram diagram
A
B
C
N
earth wire
2#compressor
KM2 FR2
FAN
cycle
water pump
KM1
FR1
C
crankcase heating
red
blue
yellow
AB C
N
TH1
1
2
3
4
5
6
4wV
water flow switch
TH7 TH6 TH5 TH4 TH3 TH2 TH1
power supply input
3N380V~50Hz
high pressure protection low pressure protection
return water temp return gas temp2 return gas temp1
environment temp exhaust temp2
exhaust temp1
evaporator coil temp2
N
HP P L
2.3-2.8MPa 0.05-0.15MPa
control
panel
electric
expansion
valve
123
ON
cycle
water pump
fan
auxiliary electric heating
water supply valve
4-way valve
compressor1
double compressors system wiring diagram
1#compressor
KM1 FR1
TH2 TH3 TH4 TH5 TH6 TH7 TH8 TH9 TH10 TH11
KM2
FR2 compressor2
return water valve transformer
TH8
evaporator coil temp1
TH9
outlet water temp2
TH10
outlet water temp1
TH11
water tank temp

Airtowaterheatpumpoperationmanual
P16
WARRANTY WARRANTY WARRANTY WARRANTY
Dearcustomers,
Thankyouforusingourproducts.
We willsupplyyouwithcompleteafter-servicesaccordingto
“SUN&DAY”and“Newthreeguaranteesofquality” . Pleasereadourinstructionformoredetailbeforeusing,so
thatyouknowhowtoinstallanduseproperl y itsexcellentcharacteroffunction.Ifyouhaveanyproblems or
suggestions,pleasecontactthelocalagent or appointedRepairCompany.Theywillgiveyougoodanswerandbetter
service.
Themeanwhile,Pleasesendthecertificationthatyoucutawayfromwarrantycardtoourcompanyafteryou
installtheheatpumpintwoweeks. We willrecord it validly,andthenyourheatpumpwillgetrepairsforeverfrom
thedaywhenyoubrought it (Excepttheprojectmachinewhichfixperiodis 1 year).Duringwarrantyperiodwecan
freelysupplyaccessory.Afterthattimeyoushouldpayforrelevantmaterialfee.
Ifthereisproblem,pleasewritedownthesituationaboutproblem&theNo.ofcertificationandinformour
company,thenwewillsendpersontorepair it. Butthefollowsituationsarebeyondourfreerepairprogram.
1.
Theforcesofnaturecausedtheproblem.A>Flood,earthquake,typhoon,snowstorm,andthunderand
lighting.B>Pleasecleanuptheinside,wateraroundcondenserwhennotusing it Whentemperatureis
belowzero5Cdegreeandthereisnoelectricity.Makesure it isnotdamaged by ice.
2.
Incorrectaction.Forexample:Didn’ t cleanevaporator,lackingofwater,notenoughvoltageandsoon.
3.
Theproblemcaused by overuserange.A>beyondthefixedtemperaturerange,Using it whenthe
voltageistoohigh or too low. B>themachineworkscontinuouslyover12hoursperiodleadingto
compressordamaged.
4.
Theproblemcaused
by changecircuitboard or changeaccessorywithoutpermission
5.
Theproblemcaused by repairs,ifdone by someonenotcertified by ourcompany.
6.
Theproblemcause
by incorrectinstallation.A>themistakeofmisleadpipeB>themistakeofmislead
cable.C>Modifiedproductswithoutpermission.
We reservetherightoftheproblemofthefinalrelease
Repairrecord
DateReasonRepaircompanyMemory