1
st
Issue rev. b
04/2016
DBL462e
Page 6
N°
LEDs
behaviour
Error
Actuator use
Actuator behaviour
Typical trouble shooting
condition
Reset
procedure
Automatic calibration
(DIP N. 7 OFF)
Manual calibration
(DIP N. 7 ON)
1
RED ON
Valve stroke less
than 5mm
Calibration/first
installation
The actuator
pushes/pulls 2 times
(unexpected stall)
trying to remove the
possible obstacle.
After 2 tries an alarm
is signalled and the
actuator moves to
initial position and does
not respond to control
signal. Stroke value is
not updated because
out of range
The actuator pushes/
pulls 2 times against
endpoint during
calibration and the
actuator moves to the
initial position and then
it does not respond to
the control signal. The
actuator keeps the
previous stroke
Valve with a stroke
length lower than 5mm
Remove
power and
power up
again
2
RED LED
quick
bl
GREEN ON
Stroke longer
than 60mm
Calibration/first
installation
The actuator exits the
60mm stroke range
and it moves toward
the new stroke limit
signalling an anomaly.
The actuator pushes/
pulls 2 times against the
new stroke limit, then it
goes back to the initial
position still signalling
the anomaly until it is
not within 60mm. The
actuator does not
calibrate the stroke
after 10s (wrong range)
The actuator exits the
60mm stroke range
and it moves toward
the new stroke limit
signalling an anomaly.
The actuator pushes/
pulls 2 times against
the new stroke limit,
then it goes back to
the initial position still
signalling the anomaly
until it is not within
60mm. The actuator
does not calibrate the
stroke after 10s (wrong
range)
Valve with a stroke
length longer than
60mm
Remove
power and
power up
again
3
RED Quick
Blinking
Unexpected
stall within the
calibrated stroke
range
normal operation
The actuator tries 5
times against the new
stall condition and then
after 10s the actuator
updates the new stroke
length
The actuator tries 5
times against the new
stall condition. At the
end of the attempts
the fault will be
signalled. The actuator
does not update the
new stroke length, but
after 60s makes other
attempts to verify the
stall condition
Valve stuck
Inverted
control signal
4
RED Quick
Blinking
Stroke longer
than expected Normal operation
The actuator moves
toward the new stall
condition with a lower
speed; after 10s the
actuator updates the
new stroke value
The actuator moves
toward the new stall
condition with a lower
speed; after 10s the
actuator does not
update the new stroke
value
Stem connection loose
or valve damaged
Inverted
control signal
5
RED slow
Blinking
Low Power
Voltage
Normal operation
The actuator is
still working but
performance cannot
be guaranteed
The actuator is
still working but
performance cannot
be guaranteed
1. Wrong transformer
size
Correct
Voltage
Power
2. Unstable power
6
RED slow
Blinking
High Power
Voltage
Normal operation
The actuator is
still working but
performance cannot
be guaranteed
The actuator is
still working but
performance cannot
be guaranteed
1. Wrong transformer
size
Correct
Voltage
Power
2. Unstable power
DIAGNOSTIC - ALARM FUNCTIONS
