Sulzer ABS PC 441 - Pump Reversing; Other Settings Regarding Pump Reversing

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3.5 Pump reversing
In the Settings / Common P1-P4 / Pump reversingspecieswhichpumporpumpsshallusethereversing
function.
Thereversingcanbetriggeredon:
• Digitalinput“PumpFail”
• Tripped motor protector (after auto reset)
• High motor current
• Lowpumpcapacity
• Preset number of pump starts
If more than the set threshold for number of reverse triggers occurs within a preset time frame (default 5/60
minutes),nofurtherreverseattemptsaredonewithinthesetblocktime(default24h),ifmanualresetnotis
required.AcknowledgeoftheMaxreverseattemptsalarmoramanualreversefromlocalcontrolpanelclears
potentialreverseblockconditions.
Reversing when digital in pump fail active
If set to YES;ReversecyclestartswhendigitalinputsignalPumpFailgoesactive.Thesignalmustgobackto
inactivestatebeforethepumpstartreversing.Ifnotreversingcycleisaborted.
Reversing when Fallen motor-protector
If set to YES;ReversecyclestartswhenthedigitalinputsignalMotorProtectorgoesactive.Motorprotector
will be reset before the pump starts reversing. You must enable auto reset motor protector function for the
pump. Set the cold down time and pulse time in the auto reset menu. If the motor protector reset fails reversing
cycleisaborted.
Reversing when Low pump capacity
If set to YES;Reversecyclestartsonalarmforlowpumpcapacity.Forthisfunctiontoworkyouneedtoen-
ablethelowpumpcapacityalarminthepumpalarmsmenu.Afterreversing,thefunctionisdisableduntila
minimumof10newpumpcapacitiescalculationshavebeencompleted.Whenenablingthepumpcapacity
calculation,theusermustsetthenominalcapacityforthepump:
- In menu Status / Pump X / Pump capacity
Reversing on overcurrent
Reversecyclestartswhenalarmforhighmotorcurrentisactivated.Forthisfunctiontoworkyouneedtoen-
ablethealarminthepumpalarmmenu.Usethealarmdelaytimetodelaythestartofreversing(don’ttrigger
on pump start current).
Reversing on start count
Thereverscyclecanbetriggedafterspeciednumberofstartsforeachpumptoeliminateclogsandensure
proper function. If this function is set to YES,thesubmenuappears,andselectablenumberofstartscanbe
speciedforeachpump.Inthissubmenu,thecurrentstartcountersaredisplayed.
3.5.1 Other settings regarding pump reversing:
In menu Settings / Common P1-P4 / Pump reversing
- Set [Reversing pump x] to [Yes].
- Set [Start rev. delay time].Thetimetoholdthepumpino󰀨positionbeforethestartofpumpreversing
- Set [Rev. run time]. The reversing run time.
- Set [Max no. attempts]Afterthereversing,thepumpwillstartagain.Ifthepumpfailsagain,anewreversing
cyclewillbegin.Hereyousetmaxnumberofattempts.
Pump reverse is considered successful when the pump has been running for the set time [Start rev. delay
time]withoutanypumperror.
On success the attempt counter is reset.
Iftheattemptscounterreachesmaxnumberofattempts,analarmwillbegeneratedandallfurtherreversing
stoppeduntilmotorprotectoralarmorpumpfailalarmshasbeenresetmanually.
- Set [Stop pumps before rev.] to [Yes]ifyouwanttheotherpumpstostopandstayblockedwhenreversing
cyclerun.
If [Pump rel. when rev] is set to [ON],thepumprelaywillbeactivated1secafterthereversingrelayandwill
bedeactivated1secbeforethereversingrelayisdeactivated.Herepumprelayisusedtocontrolthepump
(on/o󰀨)andreversingrelayisusedtoshifttwophasesbeforereversing.
If [Pump rel. when rev] is set to [OFF]onlyreversingrelayisactivatedduringreversing.Pumprelayisalways
o󰀨duringthereversingprocess.