16
ATTENTION
If the watermaker has been stopped by using the pump switches and not the Stop button, or if
some air is in the system, the automatic hydraulic valve may stop in a central position. This
means that pressure on both sides of the valve are the same and the unit is effectively stalled and
has to be manually restarted.
The symptoms of this are when the pumps are turned on, the manometer reaches an elevated
pressure ( more than 9 Bar) and the pumps shutdown automatically by the pressure switches
intervention. The pumps then have the tendency to try to restart when the pressure decreases, and
then to jam again, resulting in a typical start-stop noise. After approx. 20 sec. the computer
senses the anomaly, and turns the pumps (the red light flashes).
Recognize the alarm activating the STOP push-button.
This phenomenon, besides being very rare, does no harm to the system, but it is necessary to
reset the valve with the following simple procedure:
RESET PROCEDURE
1.
Turn the system off.
2.
Open the reset valve (lever in horizontal position).
3.
Screw the positioner knob clockwise until it can be moved no further. 10 turns at
least are necessary.
4.
Unscrew the positioner knob up to the original position, until when it is blocked
back.
5.
Close the reset valve (lever in vertical position).
6.
Restart the system
