Bernard Controls EZ Serie Inbetriebnahmeanleitung Seite 12

5.6 DeaD BanD setting
MINIGAM+ control board dead band should be adjusted only if the actuator is "hunting".
In this case, use a small screwdriver to adjust the «Dead Band» potentiometer value until
the actuator stops and stays at the desired position.
5.7 auXiLiairY controL switches
The OPEN and CLOSED signalling can be managed separately by two separated control switches.
These switches are actuated by brown and grey cams.
They can be connected through terminals 20 to 25as follow :: :
5.8 heating resistor
To avoid any condensation, each EZ actuator is equipped with heating resistor. It's recommanded to
supply the heater as soon as the actuator is on site.
5.9 caution
Replace covers immediately after start-up and make sure that their seals are clean. Never fail
to replace the protection covers. If water ever enters, dry thoroughly before replacing covers.
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5.10 trouBLeshooting
PROBLEM CAUSE
No operation Motor thermal protective
No LED on. device tripped
Actuator power supply
Blown fuse
The actuator does not The yellow LED is on :
follow the commands. Torque limit switch is
tripped
Incorrect switches
configuration
Bad wiring
The actuator does not Dead band setting is not
stop on the right position correct.
and is hunting.
The remote position Bad wiring
feedback signal is wrong.
Incorrect switches
configuration
The torque limiter Torque limiter data storage The torque limiter data are stored electronically.
indication does not
diisappear once the torque
limiter sensor is no longer
tripped.
The actuator does not Reversed potentiomèter
follow the input signal.
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 (Minigam board)
Check the input signal switches configuration.
Check input signal connection between the
terminals 70 and 71
See paragraph 5.6
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.
Potentiometer on 18-17-16 positions :
- 4mA (or 0mA or 0V) = Open position and
clockwise closing.
Check switch 7 setting :
Switch 7 on A : clockwise rotation for closing.
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