VA7800 Series Electric Valve Actuators Product Bulletin
4
All VA78x0-HGx-2 Series Actuators feature a
multicolored LED that provides operational status and
failure analysis information. See Table 4 for a detailed
description of LED color indicators.
The actuator microprocessor carries out a failure
diagnosis when a failure has been detected. The
colored LED indicates the actuator status. When the
microprocessor detects that the stem has come to an
unexpected stop, it initiates a retry cycle. The retry
cycle repeats three times, and if unsuccessful, the
actuator switches to fault mode and the LED flashes
yellow. If the problem is cleared, the actuator continues
to function normally.
The LED also flashes yellow when power resumes
after a power loss. The LED continues to flash yellow
until the end stop is achieved or a recalibration process
is manually started.
Wiring Diagrams
Figure 2 and Figure 3 show detailed diagrams for the
wiring configurations of the VA7800 Series Electric
Valve Actuators.
Table 4: VA78x0-HGx-2 Series Actuators LED Status and Color Indicators
LED Color
Status
Green
Yellow
Red
Off
Power off
Blink
Motor running
Power on after a black-out
1
Temporary fault, possible valve
sticking
2
High temperature
3
Fast Blink
Calibrating
Input signal failure
Continuous
On
Power on, motor not running
Custom calibration value out of
range
Generic fault
1.
After reaching both ends of the stroke, the input signal is recalibrated and the LED switches to green.
2.
The actuator leaves this mode only if the push button is pressed for at least 5 seconds, and the previously detected error
has been resolved.
3.
This status is temporary. When the detected temperature decreases to the acceptable range, the LED switches back to
green.
Figure 2: VA7810-Axx-2 Wiring Diagram
VA7810-AGx-2 Wired
as Floating
VA7810-AGx-2 Wired
as OPEN/CLOSE
VA7810-ADx-2 Wired
as Floating
VA7810-ADx-2 Wired
as OPEN/CLOSE
VA7810-AxC-2
Auxiliary Switches Wiring
FIG
:W
IR
10
_a
xx