Troubleshooting; Electrical Test Values - ABB Contrac PME120AI Instructions Manual

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.
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
Table 9:

11.1 Electrical test values

Fig. 16: Motor block diagram
Winding resistance ± 5% at 20° C (motor)
Winding resistance ± 5% at 20° C (brake)
Table 10:
A68-2005-003 EN Electrical Part Turn Actuators for Continuous Modulating Control PME120AI (Contrac)
Error
Malfunction of actuator or valve
(e.g. cable gland fastened too
tightly)
No communication
Motor / brake is defective
Digital inputs 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
L1
L3
Possible reason
L1 (blue) - L2 (black):3,4 Ω
L1 (blue) - L3 (violet):3,4 Ω
50 Ω
Troubleshooting
Measures to be taken
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.
Set up communication using the
configuration program
Check the winding resistances of
the motor and brake.
Connect
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.
L2
(r00334x1)
19