Troubleshooting
A68-2005-003 EN
Electrical Part Turn Actuators for Continuous Modulating Control PME120AI (Contrac)
19
11
Troubleshooting
This section only describes how to handle hardware errors. Refer to the configuration program’s on-
line help for errors related to the software.
Table 9:
11.1 Electrical test values
Fig. 16:
Motor block diagram
Table 10:
Error
Possible reason
Measures to be taken
Valve cannot be moved by actu-
ator
Malfunction of actuator or valve
(e.g. cable gland fastened too
tightly)
Disconnect the actuator from the
valve.
If the actuator is working properly
then, the valve is likely to be de-
fective. Otherwise, the actuator
seems to be the error source.
Actuator does not react
No communication
Set up communication using the
configuration program
Motor / brake is defective
Check the winding resistances of
the motor and brake.
Digital inputs of electronics are
not connected
Connect
Brake does not release (no audi-
ble “click“ noise)
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.
Actuator does not work in auto-
matic mode, although “AUT“ has
been selected in the configura-
tion program
Digital input 1 (DI 1) has not been
connected.
Connect DI 1.
LEDs on the commissioning and
service field are flashing simulta-
neously
Actuator has not been adjusted
properly
Adjust the actuator.
Winding resistance ± 5% at 20° C (motor)
L1 (blue) - L2 (black):3,4
Ω
L1 (blue) - L3 (violet):3,4
Ω
Winding resistance ± 5% at 20° C (brake)
50
Ω
L1
L2
L3
(r00334x1)
