Troubleshooting; Operation - Distech Controls VA-045PNX024P Hardware Installation Manual

LED Indication Operating state
On Automatic mode
Calibration
Green
Blinking
In manual mode
On Calibration error
Red
Detection of
Blinking
foreign object
No power or
Off Off
electronics faulty
Table 2. LED Indication and Status.
Function Check
Perform the function check for modulating actuators after calibration with
a point test according to the following table:
Connection
Actuator Response
Terminals
6V Actuator's stem

Y
extends (60%)
13.6 mA
5V Actuator's stem

Y
retracts (50%)
12 mA
Actuator's stem
"Z" connected to "G"
extends to 100%
"Z" connected to Actuator's stem
"G0"
retracts to 0%
Table 3. Modulating Function Check.
After successful completion of the function check, the actuator is ready
for normal operation.

Operation

The actuator accepts a 0 to 10 Vdc or a 4 to 20 mA control signal and a
microprocessor produces a stroke proportional to the input signal.
In the event of a power failure or with no control voltage, the damper
actuator holds its position.
If the application requires a reverse-acting, modulating actuator (a control
signal of 0V corresponds to the valve being closed, and 10V to the valve
being open), then the Function Module (VA-AZX61.1) must be ordered
and installed in the VA-045PNX024P with DIP switch 1 set to ON.
Position Indication
The actuator position indicated by the position output signal "U" is
calculated by a potentiometer that sends a feedback signal via the U
terminal.
Remarks,

troubleshooting

Normal operation
Wait until calibration is
finished
(then green or red light)
Manual adjuster in
MAN position
Start calibration again
Check valve / actuator
Check operating
voltage
Position
Feedback (U)
6V
5V
10V
0V
Troubleshooting
Check that the wires are connected correctly and attached securely.
Check for adequate power supply.
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