Troubleshooting; Electrical Test Values - ABB RHD8000 Series Instructions Manual

12. Troubleshooting

16
This section only describes how to handle hardware errors. Refer to the configura-
tion program's online 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 pro-
gram
LEDs on the commission-
ing and service field are
flashing simultaneously
Fault when approaching
an end position
Table 5:
1)
If actuator end position = valve end position, mount the sensor as described in
section 11.3.2

12.1Electrical test values

Winding resistance ± 5% at 20° C
(motor)
Winding resistance ± 5% at 20° C
(brake)
Table 6:
Possible reason
Malfunction of actuator or
valve (e.g. cable gland fas-
tened too tightly)
No communication
Motor / brake is defective
Digital inputs of electron-
ics are not connected
Brake does not release (no
audible "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
Motor MC 090 BA
3,7 Ohm
1290 Ohm
Measures to be taken
Disconnect the actuator
from the valve.
If the actuator is working
properly then, the valve is
likely to be defective. Oth-
erwise, the actuator
seems to be the error
source.
Set up communication
using the configuration
program
Check the winding resis-
tances of the motor and
brake. Check the brake
fuse.
Connect
Check the air gap (should
be around 0.25 mm) and
the electrical connection
of the brake.
Check the winding resis-
tance of the brake coil.
Connect DI 1.
Adjust the actuator.
- Move the actuator ei-
ther manually or with
the CSF buttons to a
position beyond the
end posi-
1)
tion (disconnect from
valve if required).
- Move actuator back. If
required, reconnect to
to the valve (if applica-
ble)
- Adapt actuator to new
operating range
Motor MC 112 BA
1,4 Ohm
1020 Ohm