ABB Contrac RSD 20-5,0 Manual de instruções - Página 17

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ABB Contrac RSD 20-5,0 Manual de instruções

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:

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-

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

1290 Ohm

1079 Ohm

MC 112 BA

1,4 Ohn

1020 Ohm