Priva NUTRIJET - A fertiliser, acid or lye is not being dosed

During the production of irrigation water, the pressure on the line to the venturis is too
low
While preparing irrigation water, the manometer on the line to the venturis indicates a pressure
that is too low.
SolutionPossible cause
The discharge valve is open or there is a (major) leak in
the main line or the distribution system.
• Ensure that the discharge valve is closed.
• Priva Partner: check the main line and the
distribution system for leaks, and repair them if
necessary.
Priva Partner: swap 2 phases of the mains power supply
(disconnect electrical power first!)
The system pump is turning in the wrong direction.
Bleed the system pump (refer to the documentation for
the pump concerned).
There is air is the system pump.
Clean the dirt filter (see Cleaning the inline dirt filter
(page 27)).
The inline dirt filter on the unit is blocked.
NutriJet Bypass: The suction pressure on the line after the mixing chamber is too low or
too high
SolutionPossible cause
Priva Partner: adjust the pressure reducing valve or
valves in the bypass line.
The pressure reducing valve or valves in the bypass line
have not been adjusted correctly.
A fertiliser, acid or lye is not being dosed
SolutionPossible cause
Ensure an adequate level in the tank or barrel. Then
ensure that the air is bled from the line or hose.
The level in the tank or barrel is too low, causing air to
be drawn in.
Check whether the valve or valves in the line are open.A valve in the line (if fitted) is closed.
Ensure that the air bubble is bled from the line.There is an air bubble in the line.
The dosage valve does not open.
• Check the software settings (for instance whether
the fertiliser is included in the recipe).
• Priva Partner: check the circuit that controls the
dosage valve. Replace any defective components.
• Priva Partner: check the dosage valve. Replace it if
necessary.
Priva Partner:
Check whether there is indeed insufficient water flowing
through the venturi by temporarily replacing the dosage
valve with a vacuum gauge in order to measure the
underpressure.
Resolve the problem by disassembling the venturis and
checking for blockages etc.
There is no flow, or an insufficient flow, of water through
the venturi.
Clean the filter in the dosing channel.A filter in the dosing channel is blocked.
Clean the filter.A filter in the line is blocked.
Priva Partner: check the pipe-work for leaks.There is a leak in the line or in the connection between
the dosage valve and the venturi allowing air to be
suctioned-in.
33NutriJet - user - 00.002
Troubleshooting