Munters ML690 - Page 24

DehumidierML420-MLT1400
Item
Switch/Indicator
Function
1MainpowerswitchWhenthemainpowerswitchissetto”0”,thereisnopowerinthecontrolcircuit,
andtheunitcannotbestarted.Whenthemainpowerswitchissetto”1”,poweris
suppliedtothecontrolcircuit,andthedehumidiercanbestartedusingthemode
switch.
2Modeswitch
Whenthemodeswitchissetto”MAN”thedehumidierisinmanualmode.Itthen
runscontinuously(fullcapacity).
Withthepowerswitchsetto”0”,thedehumidierisswitchedoff.
Whenthemodeswitchissetto”AUT”thedehumidierisinautomaticmode.Inthis
mode,asingleortwostagehumiditysensormustbeconnectedtotheunitifitisnot
equippedwithaRH98oraVariDrycontrolsystem.Thehumiditysensor,RH98or
VariDrydictateswhenthedehumidierstopsandstarts.
3
ReactivationairfanindicatorThereactivationairfanindicatorlamplightswhenthefanisrunning.Itashesifthere
isafaultinthefan.
4Reactivationairtemperature
display
Indicatesthereactivationairtemperature.
5
Mainssupplyconnection
indicator
Indicatesthatmainssupplyisconnectedtothedehumidierandthemainpower
switchissetto”1”.
6Unitrunningindicator
Indicatesthattheunitisrunning,orisreadytostartuponasignalfromthehumidity
sensor,RH98orVariDry(automaticmode).
7
Faultindicator
Aashingfaultwarningindicatorlampindicatesthattheunithasshut-downduetoa
faultinoneofthefollowing:
-Processairfan
-Reactivationairfan
-Drivemotor
-Reactivationheater(stage1)(electricreactivationheatermodelsonly)
-Reactivationheater(stage2)(electricreactivationheatermodelsonly)
-Rotorhasstopped
(1)
-Auxiliaryequipment
(2)
Thecorrespondingindicatorsashtofacilitatefaulttracing.Inaddition,therelay
fortheremoteindicationoffaultsisactivated.Forfurtherinformationseesection
8.3,Faulttracinglist.
8Auxiliaryequipmentindicator
Thisisauserdenedoption.Theindicatorlightsinnormaloperationalmodeand
ashestoindicateafault.Thedehumidierisautomaticallyswitchedoff,andthe
faultandremoteindicatorsareactivatedifafaultoccursintheauxiliaryequipment.
Forunitsttedwithanair-cooledcondenser,theauxiliaryequipmentindicatorlamp
isonwhenthecondenserisinnormaloperationalmodeandashesifafaultoccurs
inthecondenserfanorheater.
9
Processairlterblocked
indicator
(1)
Whentheindicatorforblockedprocessairlterlights,thelterisblocked.Ablocked
lterdoesnotmeanthattheunitmustbeswitchedofforthatthefaultindicatoris
activatedTheremotefaultindicator(ifinstalled)isactivatedwhenablockedlteris
detected.
10DrivemotorindicatorThedrivemotorindicatorlamplightswhentherotor'sdrivemotorisrunning.It
asheswhenthereisafaultinthedrivemotorortherotorhasstopped.
11
ProcessairfanindicatorTheprocessairfanindicatorlamplightswhenthefanisrunning.Itashesifthere
isafault.
12Reactivationheaterindicator
(stage1)
Theindicatorlightswhentheheaterstarts.Itashesifthereisafaultintheheater
(stage1).
13Reactivationheaterindicator
(stage2)
Theindicatorlightswhentheheaterstarts.Itashesifthereisafaultintheheater
(stage2).
14
Reactivationairlterblocked
indicator
(1)
Whentheindicatorforablockedreactivationairlterlights,thelterisblocked.
Ablockedlterdoesnotmeanthattheunitmustbeswitchedofforthatthefault
indicatorisactivatedTheremotefaultindicator(ifinstalled)isactivatedwhena
blockedlterisdetected.
(1)Options.
(2)Forunitsttedwithanair-cooledcondenser,theauxiliaryequipmentindicatorlampisonwhenthecondenserisinnormal
operationalmodeandashesifafaultoccursinthecondenserfanorheater.
Table6.1Operatorpanelfunction
20Operation190TGB-1035-H1604