Trouble shooting
24 LME620-AI/-AN
(Contrac) 42/68-273-EN
8 Trouble
shooting
This chapter only covers hardware-related errors. For additional troubleshooting information,
refer to the online help for the operator interface.
Error
Possible cause
Troubleshooting
Valve cannot be moved by
actuator.
Failure either on the
actuator or the valve (e.g.,
stuffing box tightened too
much).
Disconnect actuator from valve.
If the actuator moves, the valve is
the possible cause.
If the actuator does not move, the
actuator is the possible cause.
Incorrect electronic unit or
incorrect data record.
Compare information on name
plates for actuator and electronic
unit.
Incorrectly configured
electronic unit.
Check/update the settings for the
parametrization software.
No communication with
the control system.
Check wiring.
Incorrect wiring between
actuator and electronic
unit.
Check wiring.
Defective motor/brake.
Check the winding resistance of
the motor and brake.
Check the brake lock.
Binary inputs on the
electronic unit are not
wired.
Make connection.
The actuator does not
respond.
Brake does not release
(no mechanical "click").
Check the brake air gap (approx.
0.25 mm (0.010 inch)) and
electrical connection to the brake.
Check winding resistance of the
brake coil.
Actuator does not run in AUT
mode, although “AUT” is
selected in the user interface.
Digital input 1 (DI 1) not
wired.
Make connection.
Check the software settings for
the digital inputs.
LEDs in the commissioning
and service panel (CSP)
flash synchronously.
Actuator is not adjusted
properly.
Adjust actuator.
LEDs flash alternately.
Electronic unit / drive
malfunction.
Malfunction when
approaching the end position.
Actuator in limit range of
positioning sensor.
Drive the actuator beyond the
adjusted end position (either
manually or using the pushbuttons
on the CSP). Disconnect from
valve, if necessary.
Drive the actuator back into the
operating range and connect it to
the valve.
Readjust the actuator for the
operating range.
Содержание LME620-AI
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