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13. Troubleshooting
This section only describes how to handle hardware errors. Refer to the configuration program's online
help for errors related to the software.
Error
Valve cannot be moved by actu-
ator
Actuator does not react
Actuator does not work in auto-
matic mode, although "AUT" has
been selected in the configura-
tion program
LEDs on the commissioning and
service field are flashing simulta-
neously
Fault when approaching an end
position
Table 10:
1)
If actuator end position = valve end position, mount the sensor as described in section 12.3.2.
13.1 Electrical test values
winding resistance
± 5% at 20° C (motor)
winding resistance
± 5% at 20° C (brake)
Table 11:
Possible reason
Malfunction of actuator or valve
(e.g. cable gland fastened too
tightly)
No communication
Motor / brake is defective
Digital input of electronics are
not connected
Brake does not release (no audi-
ble "click" noise)
Digital input 1 (DI 1) has not been
connected.
Actuator has not been adjusted
properly
Actuator is working in the limit
range of the position sensor
MCS 71 BA
MCS 80 BA
21 Ohm
8 Ohm
2180 Ohm
1730 Ohm
Measures to be taken
Disconnect the actuator from the
valve.
If the actuator is working prop-
erly then, the valve is likely to be
defective. Otherwise, the actua-
tor seems to be the error source.
Set up communication using the
configuration program
Check the winding resistances of
the motor and brake. Check the
brake fuse.
Connect input
Check the air gap (should be
around 0.25 mm) and the electri-
cal connection of the brake.
Check the winding resistance of
the brake coil.
Connect DI 1.
Adjust the actuator.
- Move the actuator either man-
ually or with the CSF buttons
to a position beyond the end
posi-
1)
tion
(disconnect from valve if
required).
- Move actuator back. If re-
quired, reconnect to to the
valve (if applicable)
- Adapt actuator to new operat-
ing range
MC 90 BA
MC 100 BA
3.7 Ohm
3.7 Ohm
1290 Ohm
1079 Ohm
MC 112 BA
1,4 Ohn
1020 Ohm
17
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