Controlled Products Systems Group HTG 320-2 ST - Manual (Page 53)

StrongArm Installation and Reference 43
Troubleshooting Guide, StrongArm (HTG 320) Gate Operators
Important Note:
If the manual bypass valve is open, the electric motor will run, but nothing will move. See the drawing on
page 10 to locate the bypass valve. To close the valve, twist to allow the knob to re-engage.
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 gate is in the open position, and an open input is still active, a close input cannot close the
gate until the open input is cleared. Verify the input status by pressing the LED tact button.
6. If the motor contactor chatters, voltage drop due to undersized wires is the likely cause. Check
Appendix 9 for the maximum allowable length of wiring runs vs. wire size.
"Motor is running, but nothing is moving."
1. Check the manual bypass valve. Close it if found open. See note at top of this page.
2. If the power is three-phase and the electric motor is running clockwise reverse any two of the three
lines.
3. Check the fluid level in the reservoir. See maintenance instructions.
4. If the arm is closed and will not open, assist the arm by lifting it manually, if the arm moves with
help, the open brake valve may be set too tight or pressure relief valve set too low. Alternately,
there may not be sufficient counterweight. See page 11 for adjustments.
5. If the arm is open and will not close, check the close brake valve setting. See page 11.
"The arm tries to close when commanded to open."
1. Verify that the electrical coil to the hydraulic directional valve is connected.
2. Review information below pertaining to the directional valve.
"The arm bounces at the end of travel."
1. The brake valves and/or limit switches need adjustment. See page 13 for this procedure.
DIRECTIONAL VALVE: Our operators employ a two position, single solenoid directional valve. When
24-volt DC power is applied, the flow is directed to open the gate. In its normal spring loaded relaxed
position the flow is directed to close the gate. If a malfunction should occur, it would most likely cause the
gate to only move in the close direction. The directional valve is totally maintenance free.
To troubleshoot, first verify that 24 volts is being applied to the valve coil when an open command is
given. Next, verify that the valve coil is functioning by removing its retaining nut and holding the coil
slightly loose to verify that it is magnetized when the controls are activated to open the gate. If the
problem persists, exchange the valve and change the hydraulic oil so that any debris in the oil would be
removed.