Slide Valve Trouble Shooting Guide
Problem | Reason | Solution |
The actuator cannot be cali- brated
The actuator goes into cali- bration mode spontaneously
The actuator goes into calibra- tion mode every time power is restored after a power loss
Dirt or debris is blocking one or both optocoupler slots
The photochopper fence extends less than about half way into the optocoupler slots
The white calibrate wire in the grey Turck cable is grounded
Dirt and/or condensation on the position sensor boards are causing it to malfunction
The calibrate button is stuck down
The position sensor has failed
Push button is being held down for more that ¾ second when going through the calibration proce- dure
The white calibrate wire in the grey Turck cable is grounding intermit- tently
A very strong source of electro- magnetic interference (EMI), such as a contactor, is in the vicinity of the actuator or grey cable
There is an intermittent failure of the position sensor
The motor brake is not working properly (see theory section above.)
Clean the optocoupler slots with a
Adjust the photochopper so that the fence extends further into the optocoupler slots. Make sure the motor brake operates freely and the pho- tochopper will not contact the optocouplers when the shaft is pressed down.
Tape the end of the white wire in the panel and make sure that it cannot touch metal
Clean the boards with an elec- tronics cleaner or compressed air.
Try to free the stuck button.
Replace the actuator.
Depress the button quickly and then let go. Each ¾ sec- ond the button is held down counts as another press.
Tape the end of the white wire in the panel and make sure that it cannot touch metal.
Increase the distance between the EMI source and the actua- tor.
Install additional metal shield- ing material between the EMI source and the actuator or cable.
Replace the actuator.
Get the motor brake to where it operates freely and recali- brate.
50