Mack MRU - Page 22

18INSTRUMENTSANDCONTROLS
3.TraceSensorAlarmIndicators(Amber)—IlluminationoftheamberLEDfor
"Zone1"(cabcompartment)or"Zone2"(enginecompartment)indicatesthesystem
hasdetectedagasconcentrationabove20%oftheLEL.Thisisacautionarysituation.
Correctivemeasuresshouldbetakenassoonaspossible—includingopeningthe
vehiclewindowsandreturningthevehicleforservice—toidentifyandcorrectthe
sourceofthemethaneleak.
4.AudibleAlarmSilenceButton—Presstosilencetheaudiblealarm.
5.AlarmSilencedIndicator—Illuminatestoindicatetheaudiblealarmhasbeen
silenced.
6.RelayOn/OffIndicator—IfthereisaSIGNIFICANTalarmdetectedfor15
seconds,the"RelayEngaged"LEDwillgoon.Theremotewindshield-visiblegreen
lampwillgooutandtheremotewindshield-visibleredlampwillilluminate.
7.Relay(Shutdown)ResetButton—Onlyafterthemethanegashasclearedand
thealarmsareoff,maytheinternalrelayberesetbypressingthe"ShutdownReset"
button.AfterpressingtheShutdownResetbutton,the"RelayEngaged"LEDgoesoff.
8.SystemTestButton—Pressingthebuttonwillcausethesystemtoperforma
self-testofallelectricalandsensorfunctionsandsimulateanalarmcondition.The
systemreturnstonormalwhenthetestbuttonisreleased.
9.SensorFaultIndicators—IfeitherSensorFaultlightremainsilluminated
orilluminatesintermittently,adisconnectedorfaultysensorisindicatedinthe
correspondingzone.Zone1indicatesthecabcompartmentsensorandZone2
indicatestheenginecompartmentsensor.Donotoperatethevehicleuntilaqualied
personcorrectsthiscondition.
CAUTION
AMGaDSIIIPlusisapropane,CNG(CompressedNaturalGas)andLNG(Liquid
NaturalGas)detectoronly.However,becausethesensorsdetectallhydrocarbon
vapors,analarmmaybetriggeredbytheuseofchemicalssuchascleaners,paint,
polish,lacquer,etc.Donotexposesensorstoliquidsorchemicalsunnecessarily.
Whenusingsuchsubstances,keepthevehiclewellventilatedanddonotallow
directcontactwiththesensors.ForcleaningandmaintenanceoftheGasDetection
System,refertotheAMGaDSIIIPlusOwner’sManualsuppliedwiththevehicle.