Danfoss AK-CC 550 - Function Survey and Parameters

AK-CC 550 Manual RS8EN502 © Danfoss 02-2010 15
Survey of functions
Function Para-
meter
Parameter by operation via data
communication
Normal display
NormallythetemperaturevaluefromoneofthetwothermostatsensorsS3orS4ora
mixture of the two measurements is displayed.
Ino17theratioisdetermined.
Displayair(u56)
Thermostat Thermostat control
Set point
Regulationisbasedonthesetvalueplusadisplacement,ifapplicable.Thevalueisset
viaapushonthecentrebutton.
Thesetvaluecanbelockedorlimitedtoarangewiththesettingsinr02andr03.
Thereferenceatanytimecanbeseenin"u91Cutouttemp".
Cutout °C
Differential
Whenthetemperatureishigherthanthereference+thesetdierential,thecom-
pressorrelaywillbecutin.Itwillcutoutagainwhenthetemperaturecomesdownto
the set reference.
r01 Dierential
Setpoint limitation
Thecontroller’ssettingrangeforthesetpointmaybenarroweddown,sothatmuch
toohighormuchtoolowvaluesarenotsetaccidentally-withresultingdamages.
Toavoidatoohighsettingofthesetpoint,themax.allowablereferencevaluemaybe
lowered.
r02 Max cutout °C
Toavoidatoolowsettingofthesetpoint,themin.allowablereferencevaluemaybe
increased.
r03 Min cutout °C
Correction of the display’s temperature
Ifthetemperatureattheproductsandthetemperaturereceivedbythecontrollerare
notidentical,anosetadjustmentofthedisplaytemperaturecanbecarriedout.
r04 Disp.Adj.K
Temperature unit
Sethereifthecontrolleristoshowtemperaturevaluesin°Corin°F.
r05 Temp. unit
°C=0./°F=1
(Only°ConAKM,whatevertheset-
ting)
Correction of signal from S4
Compensation possibility due to long sensor cable
r09 AdjustS4
Correction of signal from S3
Compensation possibility due to long sensor cable
r10 AdjustS3
Start / stop of refrigeration
Withthissettingrefrigerationcanbestarted,stoppedoramanualoverrideofthe
outputscanbeallowed.(Formanualcontrolthevalueissetat-1.ThentheAKVoutlet
andtherelayoutletscanbeforce-controlledbytherespectivereadingparameters
(u23,u58,etc.).Herethereadvaluecanbeoverwritten.)
Start/stopofrefrigerationcanalsobeaccomplishedwiththeexternalswitchfunc-
tionconnectedtoaDIinput.
Stoppedrefrigerationwillgivea”Standbyalarm”.
r12 Main Switch
1: Start
0: Stop
-1: Manual control of outputs allowed
Night setback value
Thethermostat’sreferencewillbethesetpointplusthisvaluewhenthecontroller
changesovertonightoperation.(Selectanegativevalueifthereistobecoldac-
cumulation.)
r13 Nightoset
Thermostat function
Hereitisdenedhowthethermostatistooperate.EitherasanordinaryON/OFFther-
mostat or as a modulating thermostat.
1:ON/OFFthermostat
2: Modulating
Whenoperationis”modulating”theAKVvalvewilllimittheowofrefrigerantsothat
thetemperaturevariationwillbelessthanfortheON/OFFthermostat.
Thedierential(r01)mustnotbesetlowerthan2Kfor"modulating".
InadecentralisedplantyoumustselecttheON/OFFthermostatsetting.
r14 Therm. mode
Selection of thermostat sensor
Hereyoudenethesensorthethermostatistouseforitscontrolfunction.S3,S4,ora
combinationofthem.Withthesetting0%,onlyS3isused(Sin).With100%,onlyS4.
r15 Ther.S4%
Melt function
Onlyforcontrolofrefrigeration(-5to+10°C).Thefunctionensuresthattheevapora-
torwillnotbeblockedbyfrost.Hereyousethowoftenthefunctionistostopthe
refrigerationandhencetransformthefrosttowater(oriceifthereistoomuchfrost).
r16 MeltInterval
Melt period
Hereyousethowlonganon-goingmeltfunctionistolast.
r17 Melt period
Ref. Dif.