Service manual

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. R&D, HOBART CHINA AMX/AM900 / 19
7.4.2SOFTENERCHECKPROCEDURE
Check:
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Parameter[C84]=numberofsaltfillings.
Parameter[C85]=numberofwashcycleswithdeficiencyofsalt(illuminatedsaltindicator).
Whatyouneedtoverifythesoftenerfunction:
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1. Testkittomeasurethewaterhardness(partnumber607236).Payattentiontoexpiry‐date.
2. Aconductivity‐meter(possiblypHindicatorstrips609927).
Howrespectivelywheretomeasure?
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Usecleantea‐cuporbeakerforsamplingwater.
1. Takemeasurementofthetotalwaterhardness(°dh)atthetapwherethemachineisconnectedto.
2. Measuretheconductivity(μS/cm)at thetapwherethemachineisconnectedto.
3. Measurethehardnessofthewaterin
thebooster.
Therefore,theboosterdrainhoseistobeused.Discardthefirstcupofwatertoensurethatnoresiduals
fromthehosefalsifythemeasuredvalue.
4. Measuretheconductivityoftheboosterwater.
Adjustmentofsoftenersettingaccordingtothehardnessofincomingwater:
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1. Ensureadequatesoftenersetting:
H01=upto7°dh/H02=8to14°dh/H03=15to21°dh/H04=22to30°dh.
2. Ensurethatthesaltchambercontainssalt.
3. Ensurethatgranularsaltisused(salttabletsarenotallowed).
4. Ensure
thatthesaltchamberhasbeenfilledupwithwater.
ApproximatevaluesifsoftenerfunctionisO.K.:
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Theconductivityoftheboosterwatershallbeabout300μS/cmhigherthantheconductivityofthatwatertaken
atthetap.
Forexample:Ifthetotalhardnessoftheincomingwateris500μS/cm,theconductivityoftheboosterwaterwill
beroughly800μS/cm.Ifthisvalueis
significantlyhigher(e.g.3000μS/cm),anincorrectsoftenerfunctionisvery
likely.
Furthersteps:
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1. Adjustthesoftenerto"H04"toensureanewregenerationwillbeactuatedevery3cycles.
2. Selecttheshortestprogram“P01”andtakeasampleofwater(atea‐cup)attheboosterdrainhose
immediatelyaftertheprogramcyclehasceased.
3. Measureandnotedownthe
waterhardness.
4. Measureandnotedowntheconductivity.
Repeatprocedures1to4seventimestoensuresaltingofbothresincolumns.
Anincorrectsoftenerfunctionismostsupposableifthemeasuredhardnessattheboosterdrainhoseishigher
than5°dhand/ortheconductivityisextremelyhigh
(i.e.intherangeof3000μS/cm).
Proceedasfollowingincaseoftoohighhardnessand/orconductivityvalues:
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1. Runthedraincycletoensureboosteremptyingdowntothepumpintake.
2. Removethesidepanels.
3. Activatethesoftenertestprogram"U03"asdescribedonnextpage.
Observetheresincolumnswiththeaidofatorchfromthelefthandsideofthemachine.
(Column
"A"isattheleft,column"B"isattherightfromthispointofview).
Ifthesequentialoperationdeviatesfromthedescribedone(seenextpage),i.e.resin"B"wassixtimes
activated,itisverylikelythatasoftenervalveisjammingortheelectricalconnectionsareinterchanged
(thisislessprobable).
Theboostermustbeflushedthoroughlyattheendofthisprocedure(run5washcycles)toensurethe
chloridecontentisatanacceptableleveltopreventcorrosion.
Neverrunthesoftenertestprogramatthebeginofthehereindescribedprocedurebecauseit
isunavoidable
thatsaltwillbeflushedintothesystem.Thus,measurementswouldbecomeincorrect.
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