Trouble Shooting - ABB EBN853 Operating Instructions Manual

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Trouble shooting

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This chapter only covers failures caused by the hardware. Use the online-help of the
configuration software for an extended troubleshooting.
failure pattern
actuator can not move the
valve
actuator does not react
actuator does not run in AUT
mode, although "AUT" is
selected in the user interface
LEDs in the commissioning
and service panel (CSP)
flash synchronously
LEDs flash alternately
failure when approaching the
end position
,
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possible reason
failure either at the
actuator or at the final
control element (e.g.,
stuffing box tightened too
much)
incorrect electronic unit or
incorrect data set
Incorrectly configured
electronic unit
no communication with
the control system
incorrect wiring between
actuator and electronic
unit
motor / brake faulty
Binary inputs on the
electronic unit are not
wired
Brake does not release
(no mechanical "click")
Binary input 1 (BE 1) not
wired
Actuator is not adjusted
properly
Electronic unit / drive
failure
Actuator in limit range of
positioning sensor
EBN853, EBN861 (Contrac)
Trouble shooting
troubleshooting
detach actuator from valve
if the actuator moves the valve is
the possible cause
if the actuator does not run, the
actuator is the possible cause
Compare the nameplate data on
the actuator and electronic unit.
Check/update the settings for the
parametrization software
Check wiring
Check wiring
Check the winding resistance of
the motor and brakes
Check the brake lock
Make connection
Check the brake air gap (approx.
0.25 mm) and electrical
connection to the brake
check winding resistance of the
brake coil
Make connection
Check the software settings for
the binary inputs
Adjust actuator
drive the actuator beyond the
adjusted end position (either
manually or using the push buttons
on the CSP); <:hr>(if necessary
disconnect from valve or damper)
drive the actuator back into the
operating range and connect it to
the valve / damper
re-adjust the operating range
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