USAutomatic SENTRY 300 S - Single or dual gate installation gate auto opens instead of auto closing; Gate begins to open or close and stops and reverses after a couple of seconds; Pressing the “RESET” button only, causes the gate to operate (open, close and stop) acts like transmitter.

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6. Single or dual gate
installation gate auto
opens instead of auto
closing
1. Inthisconditiontheopentimecanbecontrolledbyadjusting
theautoclosetimeradjustment.
2. Ifinstalledinthepulltoopencongurationthencontrolswitch
number2shouldbeturned“OFF”verifyitis.Ifinstalledinthe
pushtoopencongurationverifyswitchisturned“ON”.
3. Gateistryingtoclosetoofar.Readjustcloselimitadjustfor
gate1orgate2tothecorrectstopposition.
4. Iftimebeforeautoopeningcannotbeadjustedandoccurs
inacoupleofsecondsafterclosingthenthecloselimit
adjustmentofoneorbothgatesismisadjusted.Thefeature
thatiscausingthegatetoopenisthecurrentsensecircuit
onthecontrolboard.Thegateistryingtoclosefartherthan
possibleandithastraveledtothefullextentofthelinear
actuator.Verifythatlinearactuatorharnesshasnocutsor
nicks.
5. Verifycorrectinstallationoftheuniversalactuatorbracket.
Possiblecauseisincorrectinstallationofthegatebracketor
linearactuatorbracket.Verifyandcorrectasrequired.
7. Gate begins to open or
close and stops and
reverses after a couple
of seconds
1. Thisoccurswhenthesensitivitycircuitonthecontrolboard
sensesanobstruction.Verifythatthegateisnotobstructed
bysomeobjectatthepointwhereitreverses.Couldalsobe
duetohingesbindingorgatecontactingground.
2. Thisisanadjustablefeatureandthecausecouldsimplybe
an adjustment of the Gate 1 or Gate 2 sensitivity. Turn the
sensitivityadjustmenttowardaminimumsettingandalways
settheGate1andGate2adjustmenttothesamesettingon
asinglegateinstallation.Indualgateinstallationadjustboth
asnecessary.
8. Pressing the “RESET”
button only, causes the
gate to operate (open,
close and stop) acts like
transmitter.
1. Thisproblemisprobablyduetoabadreceiver.
2. ToisolatethisdisconnecttheJ3connectorfromthecontrol
board.
3. WithJ3disconnectedseeifResetbuttoncausesgateto
operate.IfgatenolongeroperateswhenResetispressed
thenthereceiverwasthecause.
4. ConnectJ3backtoSentrycontrolboardandseeifproblem
returns.Ifproblemreturnsthenthereceiverisbad.