Bernard Controls MINIGRAL+ Anleitung Seite 14

8 TROUBLESHOOTING
PROBLEM
No operation
No LED on.
The actuator does not
follow the commands.
The actuator does not
stop on the right position
and is hunting.
The remote position
feedback signal is wrong.
The torque limiter
indication does not
diisappear once the torque
limiter sensor is no longer
tripped.
The actuator does not
follow the input signal.
14
CAUSE
Motor thermal protective
device tripped
Actuator power supply
Blown fuse
The yellow LED is on :
Torque limit switch is
tripped
Incorrect switches
configuration
Bad wiring
Dead band setting is not
correct.
Bad wiring
Incorrect switches
configuration
Torque limiter data storage The torque limiter data are stored electronically.
Reversed potentiomèter
Direction of rotation
CORRECTIVE ACTION
Check if the motor is hot. The actuator will be
available after the motor has cooled down.
Check the power supply voltage between termi-
nals L and N. Compare to voltage indicated on the
identification plate.
Check the fuse and replace if required..
f the actuator has stopped on a mechanical stop,
disengage it with the handwheel and set again
the stroke (stops and end of travel switches).
Check the switches are set according to the
actuator configuration (MINIGRAL+ / MINIGAM+)
MINIGAM+: Check the input signal switches
configuration.
MINIGRAL+: Check commands connection
between terminals 31 - L and between terminals
32 - L.
MINIGAM+: Check input signal connection
between the terminals 70 and 71
See paragraph 3.6
Check signal with a voltmeter or a milliammeter
between terminals 71 and 72
Check that switches are set correctly
To clear a torque limiter memory, a reverse
command must be sent.
Check potentiometer connections.
Potentiometer is connected on 16-17-18 positions :
- 4mA (or 0mA or 0V) = Closed position and
clockwise closing.
- 4mA (or 0mA or 0V) = Open position and coun-
ter clockwise closing.
Potentiometer on 18-17-16 positions :
- 4mA (or 0mA or 0V) = Closed position and
counter clockwise closing
- 4mA (or 0mA or 0V) = Open position and
clockwise closing.
Check switch 7 setting :
Switch 7 on A : clockwise rotation for closing.
Switch 7 on B : counter clockwise rotation for closing..