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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 connec-
tion 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
thermal switch is tripping
Recalibrate.
Get the motor brake to where it
operates freely and then recali-
brate.
Replace the actuator.
Try to realign or replace the ac-
tuator.
Adjust the photochopper so that
the fence extends further into
the optocoupler slots.
Replace the actuator.
Tighten.
Clean and tighten.
Replace the actuator.
Replace the actuator.
The motor will resume opera-
tion when it cools. This could be
caused by a malfunctioning con-
trol panel. Consult the factory.
See above.
Free the command shaft.
Replace the actuator.
This could be caused by a mal-
functioning control panel. Con-
sult the factory.
The actuator does not trans-
mit the correct position after
a power loss
There is a rapid clicking noise
when the motor is operat-
ing
The motor operates in one
direction only
The motor will not move in
either direction
The motor runs intermittently,
several minutes on, several
minutes off
Slide Valve Actuator Trouble Shooting Guide
Problem Reason Solution