Esco Ascent max - Page 40

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30
Connection
problemtorelay
board
• SeeComponentLayouttolocatetherelayboard.
• MeasuretheincomingvoltageontheRelayBoardatterminalJ1(Notepolarity,
BLUEcableclosesttoedgeisnegative‐).SeeFigure1‐8.
• Voltageshouldbebetween6.75–8.25VDC.
• If
voltageisoutofrange,checkconnectionbetweenSMPSandrelayboard.
• Ifvoltageiscorrect,proceedtonextstep.

Defectiverelay
board
• Ensurethefollowingarecorrect:
o Mainboardisoperational
o FlatRibboncableisinstalledcorrectlytorelayboardandmainboardandshows
nophysicaldamage
o Relayboardhasthecorrectincomingvoltage(6.75–8.25VDC)
o Checkallfusesonrelayboard:Turn
offpower,removefusesandphysically
inspectorcheckcontinuity
o Allwiringconnectionsaregood
• Turnthecabineton.IftheFAN,LIGHT,SOCKETandcannotbecontrolled,replace
theRelayBoard.
NOTE:Whenreplacingrelayboard,pleasere‐connectallthecablesbackcorrectly.Anywrong
wiringmayresultindamage.

Problem2:Blowerdoesn’tfunction
Cause CorrectiveAction
FanisOff
• SwitchontheFanbypressingFanbuttononcontrolpanel.
• EntertheFanPINnumberifrequired(defaultis0001)
• TheLEDforFANshouldilluminateandtheFANshouldstart.
• IftheFANdoesnotoperate,proceedtonextstep.
• If
theLEDonthemembranedoesnotilluminate,checkconnectionfromcontrol
paneltomainboardandLCD,keypadmembrane.

Figure1‐8
Figure1‐9