Instruction manual Help in case of faults
67
10.3 Troubleshooting
Repair the fault either while the supply voltage is still applied or when the actuator
is briefly disconnected from the main power (not effective in cycle monitoring).
1. Check the cause of fault. To do so, open the cover of the actuator, if necessary.
2. In order to remove the fault, press the SET button on the base board, in order
to acknowledge the error, or disconnect the actuator from the mains.
3. Perform troubleshooting in accordance with the table.
Fault
Possible cause
Remedy
Actuator does
not react
No power available Check voltage source.
Internal wiring error
Correct the wiring of the actuator,
see Chapter “Installation”
End positions not correctly set
Adjust the end positions;
see Chapter “Adjusting end
positions”.
Motor blocked
Use emergency manual override;
see Chapter “Insert the emergency
manual override hand crank”.
Actuator only
runs in one
direction
Position sensor defective
Use emergency manual override;
see Chapter “Insert the emergency
manual override hand crank”.
Perform a learning run as described
in chapter “Teaching of the position
sensor”.
Overload
protection is
activated
Valve dirty/jammed Clean the valve, see valve manual.
Ambient temperature too high
If possible, reduce ambient
temperature.
Valve does not
fully close or
open
End positions not adjusted
Adjust the end positions,
see Chapter “Adjusting end
positions”.
Valve dirty/jammed Clean the valve, see valve manual.
Valve does not
close or open
correctly
Valve stem twisted Replace valve stem
If an end position is not reached, the actuator automatically switches off after 2 min.
and displays an error message.
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