The table below provides guidance on identifying and correcting any problems with your Model 400 Series sliding gate. Please refer to the HPU O&M manual for more detailed troubleshooting guides referring to the pumping unit. If you encounter problems that you cannot fix, contact B&B ARMR and we will gladly work with you to correct them.
| Symptom | Actions |
|---|---|
| Gate does not go open | 1. Check power. 2. Check overload protector. 3. Check pressure gauge. 4. Manually open the gate by depressing the directional control valve to see if the problem is mechanical or electrical. If mechanical, check for binding on the gate. If not: 5. Check PLC input. 6. Check that safeties are clear. 7. Check PLC output. 8. Check push button operation. 9. Check locking pin and proximity switch, gate will not open unless the pins are up and I3 is lit on the PLC. |
| Gate does not go close | 1. Check power. 2. Check overload protector. 3. Check pressure gauge. 4. Manually close the gate by depressing the directional control valve to see if problem is mechanical or electrical. If mechanical, check for binding on the gate. If not: 5. Check PLC input. 6. Check that safeties are clear. 7. Check PLC output. 8. Check push button operation. 9. Check locking pin and proximity switch, gate will not open unless the pins are up and I3 is lit on the PLC. |
| HPU does not build up pressure, but is running | 1. Check power. 2. Close pressure relief valve. |
| HPU pump will not turn on | 1. Check power. 2. Check motor overload, press start. 3. Check motor starter. 4. Check low level switch. 5. Check pressure switch. |
| Gate makes noise during operation | 1. Check that roller wheel bearings are greased 2. Check that gate is not moving too fast. 3. Check that the guide wheels are properly adjusted. 4. Check that the spur gear is properly adjusted to the gear rack. |
| Hydraulic unit is excessively hot | 1. Check that the pressure relief valve is closed (fully clockwise). 2. Check that the pressure switch is adjusted to shut the motor off before 1850psi. 3. Check for correct voltages. |
| Gate moves too slowly | 1. Check for mechanical binds (guide wheels out of adjustment, debris under the wheels or on the inside of gate). 2. Check flow control valve. |
| Traffic indicator light does not change | 1. Check proper limit switch operation. 2. Check bulbs. 3. Check PLC outputs. |
| Locking pins are moving but not giving signals up or down to I3 | 1. Check the proximity switches at the locking pin mechanism |