VADA VFB-S75, Руководство по установке

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Pump performance
is unstable (e.g.
there is a change or
reduction of pressure
or flow output).
There may be
cavitation in the pump
(demand for water
is higher than it
can pump).
* Cavitation can be
identified by the noise
of the pump. You
will hear a bubbling,
crackling sounds like
marbles rattling inside
the pump casing.
The length of the suction pipe may be too long,
or the internal diameter may be too small:
1. Reduce either the suction
height or distance.
2. Increase the suction pipe internal diameter
to same size as the pump inlet or larger.
Debris may be caught
in the suction pipe. Check for debris or blockages
in the suction pipe:
1. Close the isolating valve on the suction line.
2. Check for debris.
3. If found, repair or replace pipework.
There may be a leak
in the suction pipe. If the pump is turning on, then off
in short durations there may be
a leak in the suction pipe.
1. Close the isolating valve on the discharge
line side of the pressure controller
to see if the issue continues.
2. If it does, check the pressure control
for debris or suction pipe for leaks.
3. If it does continue, then check pressure
control and suction pipe for debris.
4. If found, repair or replace suction line.
Pump will not stop. The electronic card in
the pressure controller
may be broken.
* Only applicable if
application is using
a pressure controller.
If a pressure controller has been installed,
the electronic card in the controller may
need to be removed and replaced with
a new card, or a new unit entirely.
This should only be done by
a qualified electrician.
The reset button on
the pressure controller
may be locked.
* Only applicable if
application is using
a pressure controller.
If a pressure controller has been installed:
1. Press the reset button on the face
of the unit several times.
2. Or, reset the power.
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SYMPTOM CAUSE SOLUTION