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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 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
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.
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.
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
Problem Reason Solution