Problem

The actuator does not trans- mit the correct position after a power loss

There is a rapid clicking noise when the motor is operating

The motor operates in one direc- tion only

The motor will not move in either direction

The motor runs intermittently, several minutes on, several min- utes off

Reason

The motor was manually moved while the position sensor was not powered.

The motor brake is not working properly

The position sensor’s EEPROM memory has failed

The photochopper is misaligned with the slotted optocouplers

The photochopper is positioned too low on the motor shaft.

A motor bearing has failed

There is a loose connection in the screw terminal blocks

There is a loose or dirty connection in the yellow Turck cable

The position sensor has failed

There is a broken motor lead or winding

The thermal switch has tripped because the motor is overheated

Any of the reasons listed in “The motor operates in one direction only”

The command shaft is jammed

Broken gears in the gearmotor

Motor is overheating and the ther- mal switch is tripping

Solution

Recalibrate.

Get the motor brake to where it operates freely and then recalibrate.

Replace the actuator.

Try to realign or replace the actuator.

Adjust the photochopper so that the fence extends further into the optocoupler slots.

Replace the actuator.

Tighten.

Clean and tighten.

Replace the actuator.

The motor will resume opera- tion when it cools. This could be caused by a malfunction- ing control panel. Consult the factory.

See above.

Free the command shaft.

Replace the actuator.

This could be caused by a malfunctioning control panel. Consult the factory.