40
10. Photo-eye or other
safety accessory will
not reverse the gate
when closing or hold
the gate open
1. The first thing to check is the accessory wiring. See
accessory wiring information on page 21.
2. Accessory being used should be wired with the N/O wire
connected to J2 pin 5 on the Sentry control board.
3. Verify the control switch “Operating Direction Reverse” switch
is set in the correct position, Pull to Open switch is OFF.
4. Connect a wire to J2.5 then start the gate closing and then
touch the free end of this wire to J2.2. Gate should stop and
reverse. If gate reverses then the control board is working
correctly and the accessory is the problem.
5. If gate does not stop and reverse, the control board is the
problem.
11. Transmitter operating
range seems short
1. Replace the batteries in the transmitter.
2. Verify that the receiver antenna (short wire connected to
the receiver) is not twisted or rolled up. It should be pointing
toward the control box cover.
3. Some type of radio frequency interference is obstructing
signal from transmitter to receiver. Possible causes are
electric fence, high voltage electric lines in ground or
overhead. Radio towers in the area, military bases etc.. In
some cases this might not be avoided or possibly a different
frequency receiver needs to be installed.
12. Gate 1 or 2 opens
and closes, but stop
positions have changed
1. Readjust retract or extend limits
2. Verify gate open or close speed is approximately 16 seconds
3. If much slower than 16 seconds, see problem 4.
13. Gate 1 or Gate 2
only operates in one
direction
1. Verify that the cable from linear actuator to control board has
not been damaged.
2. If cable has splices, verify that connections are good and that
any exposed wires are dry.
3. Verify that the problem exists in both the Gate 1 and gate
2 connectors on the control board. make sure dipswitch for
Gate 1 or gate 2 is ON when testing.
4. If problem persists, call Sentry Customer Service.
1-866-711-0001.
