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Condensationonwindows. Reducethesettingonthecontroldialby
1increment.
Lackofhumidity. Increasethesettingonthecontroldialby
1increment.
Humidifierdoesnotoperate.
(Solenoiddoesnot"click"
whencontrolismovedto
"Test/Reset"position.)
Humidifierwon'tshutoff.
Turndialto"Test/Reset".Makecertain
HVACblowerisoperatingandHVACis
callingforheat.Ifunitstilldoesnot
operate,consultaheatingcontractor.
Turndialto"Off':Ifunitcontinuesto
operate,consultaheatingcontractor.
Testmode.
Red"CallDealerforService"
lightflashes(FigureA).
Yellow"ChangeWaterPanel"
lightflashes(FigureA).
Systemoperationischeckedbysetting
theknobto"Test/Reset".Makecertain
HVACblowerisoperatingandHVACis
callingfor heat.Humidifierwill operate
foroneminute.NOTE:Placingtheknob
in"Test/Reset"resetstheWater Panel
changetimer.
Notetheerrorcodeonthedisplay(El,E2,
E3or E4)andcallyourheatingandair
conditioningdealer.
RefertotheAnnualMaintenancesection
(page11)forinstructionsonchanging
theWater Panelor callyourheatingand
air conditioningdealerforservice.After
theWater Panelisreplaced,turnthe
Controlknobtothe "Test/Reset"
positionuntilthegreen"HumidifierOn"
lightflashes,to resettheWater Panel
changetimer.
WHENOUTSmDETEMPIS-2O_ 0_ .20_
RESETHUMIDITYTO 15% 25% 35%
OFF
90 1237
YourAprilairehumidifieriscontrolledbya ManualHumidifierControl(see
FigureC).TheManualHumidifierControlis installedeitherin thecoldair
returnductor onan interiorwall of thehome.With theManualHumidifier
Control,itisimportanttoanticipateadropinoutdoortemperatureandreduce
the settingaccordinglyto avoidexcessivecondensation,just as with the
AutomaticDigitalHumidifierControlinstalledin ManualMode(seepage6).
TodeterminetheindoorRH,slowlyturntheknobclockwiseandcounterclockwise
andlistenfor2 clicks.TheindoorRHiswithin therangeofthe2clicks.
Settheknobto"Test/Reset",makesurethatthewatersaddlevalveisopen
andthat thereis electricityto the humidifier.TheHVACsystemmustbe
operating for the humidifier to function. Note: Turning the knob to
"Test/Reset"resetsthe "ChangeWater Panel"timer.Thehumidifierwill
only operatefor 1 minute in test mode.Reducethe HumidifierControl
setting to the recommendedinside RH, depending on the outside
temperature.DO NOT LEAVEIN TESTMODE AS HUMIDIFIERWILL
NOTOPERATE.
Settheknobtothehighestsetting,makesurethat thewatersaddlevalveis
openandthat thereiselectricitytothe humidifier.TheHVACsystemmust
beoperatingforthehumidifierto function.Confirmthatthesolenoidvalveis
energizedandwaterisflowing intothehumidifier(Models400Aand400M:
Floatsmustbedownforthesolenoidvalvetoallowwaterflow).
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