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15. Troubleshooting
This section mainly describes how to handle hardware errors. Refer to the configuration program's on-
line help for errors related to the software.
Error
Valve cannot be moved by actuator
Actuator does not react
Actuator does not work in automatic
mode, although "AUT" has been
selected in the configuration program
LEDs on the commissioning and ser-
vice field are flashing simultaneously
Fault when approaching an end posi-
tion
Table 8:
Possible reason
Malfunction of actuator or valve (e.g.
stuffing box tightened too much)
Wrong electronic unit or wrong data Compare data lables of actuator and
Faulty electronic unit settings
Faulty communication to DCS
Faulty wiring between the electronic
unit and the actuator
Motor / brake is defective
Digital inputs of electronic unit are
not connected
Digital input 1 (DI 1) has not been
connected.
Actuator operating range has not
been adjusted properly
Actuator is working in the limit range
of the position sensor
Measures to be taken
Disconnect the actuator from the
valve.
If the actuator is working properly
then, the valve is likely to be defec-
tive. Otherwise, the actuator seems
to be the error source.
electronic unit
Check / modify settings using the
configuration software
Check wiring
Check wiring
Check the winding resistances of the
motor and brake. Check the brake
fuse.
Connect
- Connect DI 1
- Check software settings for digital
inputs
Adjust the actuator operating range
(see instruction for electronic unit).
- Move the actuator either manually
or with the LCP buttons to a posi-
tion beyond the end position (dis-
connect from valve if required).
- Move actuator back. If required,
reconnect to to the valve (if appli-
cable)
- Adapt actuator to new operating
range
27
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