The pH value swings wildly and ‘overshoots’
SolutionPossible cause
Reduce the concentration in the acid or lye tank.The concentration of acid or lye in the acid or lye tank
is too high.
Reduce the quantity of acid or lye in the recipe.The quantity of acid or lye in the recipe is set too high.
Priva Partner: install a flow rate ratio control to mix the
supply water with another water source that contains
the correct amount of bicarbonate.
The supply water contains too little bicarbonate.
Priva Partner: reset the P/I-factors.The P/I-factors of the pH control are set to a value that
is too high.
Calibrate the pH measurement.At least one of the pH sensors is not functioning
(correctly).
EC alarm or pH alarm
SolutionPossible cause
Change the alarm threshold setting.The alarm threshold has been set incorrectly.
At least one of the two sensors is dirty or defective.
• Priva Partner: check the sensors.
• Clean the pH sensors (if necessary) and perform a
new calibration.
(see Cleaning the pH sensors (page 28) and
Calibrating the pH sensor (page 29))
• Priva Partner: clean the EC sensors (if necessary)
and perform a new calibration.
(see EC-sensoren reinigen and EC-meting
kalibreren)
• Priva Partner: replace the suspect sensor(s) if this
does not resolve the problem.
A measuring case with a reference pH meter and a
reference EC-meter (the meters are also available
separately) is available for checking pH sensors and EC
sensors and for measurements outside of the unit.
Calibration liquids and storage liquids are available
separately.
Flow alarm
SolutionPossible cause
Correct the alarm threshold setting.The alarm threshold has been set incorrectly.
Priva Partner: check the flow sensor settings.The flow sensor is not correctly adjusted.
The flow sensor is dirty or defective.
• Clean the flow sensor (see Cleaning the flow sensor
(page 30)).
• Priva Partner: replace the flow sensor if cleaning
does not resolve the problem.
Priva Partner: trace the leak and fix it.There is a leak in the main irrigation line or in a valve
section.
The plants receive more water than is set
SolutionPossible cause
The flow sensor (if present) is dirty or defective.
• Clean the flow sensor.
• Priva Partner: replace the flow sensor if cleaning
does not help.
35NutriJet - user - 00.002
Troubleshooting
To Next Page
Loading...