Test Mode - Aprilaire 350 Owner's Manual

Condensation onwindows. Reduce the setting onthe control dial b y
1increment.
Lack ofhumidity. Increase the setting onthe control dial b y
1increment.
Humidifier does n ot o perate.
(Solenoid does n ot " click"
when c ontrol ismoved to
"Test/Reset" position.)
Humidifier won't shut off.
Turn d ial t o"Test/Reset". Make c ertain
HVAC blower isoperating and HVAC is
calling forheat. Ifunit s till d oes not
operate, consult aheating contractor.
Turn d ial t o"Off': Ifunit c ontinues to
operate, consult aheating contractor.
Test mode.
Red " Call Dealer forService"
light flashes (Figure
A).
Yellow"Change Water Panel"
lightflashes(FigureA).
Systemoperation is checked bysetting
the knobto "Test/Reset". M akecertain
HVAC bloweris operating andHVAC is
callingfor heat.Humidifier w ill operate
for oneminute.NOTE: Placing the knob
in "Test/Reset" resetstheWater Panel
changetimer.
Notetheerrorcodeon thedisplay(El, E2,
E3or E4) andcall yourheating and air
conditioning dealer.
Referto the AnnualMaintenancesection
(page11)for instructionson changing
the Water Panel o r call yourheatingand
air conditioning dealerfor service.After
the Water Panelis replaced, t urnthe
Controlknobto the "Test/Reset"
positionuntilthe green"HumidifierOn"
lightflashes,to resettheWater Panel
changetimer.
WHENOUTSmDETEMPIS -2O _ 0_ .20 _
RESETHUMIDITYTO 15% 25% 35%
OFF
90 1237
YourAprilaire humidifieris controlledby a ManualHumidifierControl(see
FigureC).The ManualHumidifierControlis installedeither in the coldair
returnduct or on an interiorwall of the home.With the ManualHumidifier
Control,it is importantto anticipatea dropin outdoortemperature andreduce
the setting accordinglyto avoid excessive condensation, j ust as with the
AutomaticDigital HumidifierControlinstalledin ManualMode(seepage6).
Todetermine theindoor R H,slowlyturntheknobclockwise a ndcounterclockwise
and listenfor 2 clicks.TheindoorRHiswithin the rangeof the 2 clicks.
Setthe knobto "Test/Reset",makesurethat thewater saddlevalveis open
and that there is electricityto the humidifier.The HVACsystemmust be
operating for the humidifier to function. Note: Turning the knob to
"Test/Reset"resetsthe "ChangeWater Panel"timer. The humidifierwill
only operatefor 1 minute in test mode. Reducethe Humidifier Control
setting to the recommendedinside RH, depending on the outside
temperature.DO NOT LEAVEIN TEST MODE AS HUMIDIFIERWILL
NOT OPERATE.
Setthe knobto the highestsetting,makesurethat thewater saddlevalveis
openand that there is electricityto the humidifier.TheHVAC systemmust
be operating for the humidifier to function.Confirmthat the solenoidvalveis
energized andwater is flowing intothe humidifier(Models400Aand 400M:
Floatsmustbe downfor the solenoidvalve to allow water flow).