Esco Ascent max - Page 39

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29
DuctlessFumeHoods
Defectivepower
supply(SMPS)
• SeeComponentLayouttolocatetheSMPS.
• Disconnectthe5‐pinconnectoroftheSMPSoutput,measuretheDCvoltage
betweenRed(pin1)andWhite(pin2)cablesontheSMPSside.SeeFigure1‐4.
• Thevoltageshouldbeinrangeof
+7.5VDC±10%.
• Ifoutofrange,pleasecheckincomingpowertotheSMPSMoldedcordintoSMPS–
checkterminalwherethecordisconnected.TheinputofSMPSshouldbe
230VAC±10%forADC‐__1/3or115VAC±10%forADC‐__2.Ifinputiscorrectbut
outputisnot,replace
theSMPS.

Connection
problemtomain
board
• SeeComponentLayouttolocatethemainboard.
• MeasuretheincomingvoltageonthemainboardatterminalJ13(Notepolarity,
bluecableclosesttoedgeisnegative‐).SeeFigure1‐6.
• Voltageshouldbebetween6.75–8.25VDC.
• If
voltageisoutofrange,checkconnectionbetweenSMPSandmainboard.
• Ifvoltageiscorrect,proceedtonextstep.

Defectivemain
board
• Restartthecabinet2to4times.
• Themainboardisdefectiveifthemainboardincomingsupplyisbetween6.75–
8.25VDCand:
o AllLED’sonthecontrolpanelareoff
o TheLCDisblank
o Nobuzzersound
• Iftheseconditions
existreplacethemainboard,otherwiseproceedtonextstep

Figure1‐4
Figure1‐5
Figure1‐6
Figure1‐7ADCMembrane
LCD
LED