Installation and Maintenance Manual
50
Troubleshooting
Also review Page 13, Mechanical & Hydraulic Adjustments
Trouble With Gate Movement in General:
1. Disengage the operator from the gate and move the gate manually. If the gate does not roll well or is
warped, fix the gate before working on the gate operator.
2. For adequate grip, the red spring that clamps the drive wheels must be compressed to 2" in height.
Adjust by unclamping and turning the nut at the bottom of the threaded rod.
3. Look inside the operator under the wheels for metal shavings. Shavings indicate that the gate panel or
the operator is out of alignment. Realign the operator as necessary. The operator must always be
square to the gate and the drive rail must be shimmed if necessary to maintain an in/out tolerance of
1/4" throughout full gate travel.
Electrical Problems in General:
The Smart Touch Controller reports system malfunctions on its LCD display and the buzzer will emit
a series of chirps at defined intervals. Review the matrix of Alerts, Faults and Errors listed on the
next page. To disclose the status of all inputs on the terminal strip, the LED tact button must be
pushed. This button is in the upper left corner near the Stop input.
Specific Types of Problems:
“I pushed the open and close buttons, but nothing runs.”
1. Verify that the line voltage is present and matches the operator voltage + 10%.
2. Verify that control voltage is present at the power supply Common and 24VDC terminals. It may be
necessary to reset the circuit breaker (black button) on the transformer.
3. Verify a jumper wire joins Common to Stop, if an external stop button is not used.
4. Verify there are no Faults or Errors reported on the LCD display. See table on next page.
5. If the motor contactor chatters, voltage drop due to undersized wires is the likely cause. Check
Appendix 9 for maximum allowable length of wiring runs vs. wire size.
“The pump is running but the wheels are slow or not turning at all.”
(Hydraulic pressure is between 0 - 700 PSI on the gauge)
1. If the power is three-phase, reverse any two AC lines and verify CCW motor rotation.
2. Check the level of the hydraulic oil by removing the plug in the reservoir. If necessary, add oil at this
location to within one inch of the filler hole.
3. Unplug the hoses and run the pump. If the pressure is low, adjust the relief valve.
4. If relief valve does not respond to adjustment, remove it entirely and depress the plunger at the
nose end with a blunt tool (Allen wrench) and blow it to remove any debris.
5. If cleaning the relief valve does not help, repeat this procedure with the quick stop valve.
“Hydraulic pressure is above 700 PSI”
1. Unclamp and spread the drive wheels, then retest. If the wheels turn, verify that the gate will move
by manually pushing it. Fix the gate hardware if necessary.
2. Verify that the hose end quick disconnects are fully seated when connected.
3. If equipped with brake valves (E or EX type), loosen them a little by turning clockwise.
“The wheels turn backwards, or only in one direction.”
1. Check hose connections for correct handing.
2. Press the Open button and verify that the directional Valve coil develops a strong pull. (This can be
tested by removing the nut retaining the coil and grasping the coil)
“The gate only opens or only closes.”
1. If the gate only opens, the directional valve is probably stuck and needs replacement.
2. If the gate only closes, the valve coil is not being energized, or is defective.
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