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5-3

7. There may be a problem with the thermistor which controls the solid state power

control (TSE1) See the section on “Checking the Thermistors.” There may also be

a problem with the power control itself (SSP1) Substitute a new part.

5.5 POOR DEHUMIDIFYING PERFORMANCE

1. Checkthetwointakelters,showninFig.1-4.Iftheseltersaredirty,cleanthem

asdescribedinthesectionon“CleaningtheAirFilters.”

2. Ifyouhaveinstalledbirdscreensontheintakeandoutletforthereactivationair,

check these.

3. Has something changed in the process space which could increase the moisture

load on the unit? Check all openings into the process space to be sure all doors

and windows are closed. Check for leaks in the ductwork.

4. Thevolumeofprocessairmaybetoogreat.Youcanreducethevolumeofprocess

air by closing the process damper. (The control system will sense the changing con-

ditionsinthestreamofprocessair,andmakeadjustmentstothetemperatureand

volumeofthereactivationair.)

5. Checktheairtemperatureattheoutletforthereactivationair.Itshouldbe120°F,

±5°.Ifitisnot,seethesectionon“ReactivationOutletTemperatureisTooLow.”

6. Oneormoreoftheheatingelementsmaynotbeworking.Seethesectionon

“Checking the Heating Elements.”

7. Iftheprocessblowerisoverloaded,itwillshutdownautomatically.Thiswillprevent

theunitfromdryingtheprocessair.Themotorwillrestartautomatically,onceithas

cooled.

8. The HoneyCombe

wheel may be stopped. See the next section.

5.6 HONEYCOMBE

WHEEL IS STOPPED, RUNNING LIGHT IS ON

1. Checkthewheeldrivesystem.SeeFig.1-4.Pullbackonthetensionertoloosen

thebelt.Removethebeltfromthedrivewheelonthemotor.SettheManual/Off/

AutoswitchtotheManualpositiontoturnontheunit.Thedrivemotorshouldturn

slowly.Seesection5.10,CheckingtheDriveMotor,WheelandSeals.

2. Afterlonguse,thelowersealmaywear.TheHoneyCombe

wheel will then ride on

theinnerlayerofthesealmaterial.Sincethisisnotasslipperyastheouterlayer,

the wheel will not turn easily. Check the condition of the lower seal. The surface of

thesealshouldbesmooth.Ifthesealisveryworn,youwillbeabletoseesomeof

theinnerlayerofsealmaterial.Ifthesealmustbereplaced,pleasecontactthefac-

tory for instructions.

Munters HC-300 User Manual

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