Italtecnica Nettuno 3P-13A Manuel D'instruction page 48

E6 Motor over
Load (
E7 Unbalanced
Load (
E8 Internal ser.
Error (
E9 Over pressure
Error (
E10 External
error (
E11 Max.starting
hour (
E12 12V supply
Error (
E13 Press.sensor
error (

POSSIBLE MALFUNCTIONS:
The pump does not stop
The stop frequency is too low; increase this value or run the self adjusting procedure.
The expansion tank does not have the correct pre-load value; check.
When one of the cocks in the system is opened, the pump does not start, or there is a few seconds delay
before it starts
The set "pump start-up DeltaP" is too high. Try to reduce the DeltaP value.
Ensure that the system is not set to stand-by; press the central key if necessary.
Check correct operation of the external permissive contact (if configured).
E6-Overload: this alarm is displayed when electric pump absorption
exceeds the maximum set current as entered in the Imax value: this may
occur following intensive use of the electric pump, continuous restarts at
0)
close intervals, problems with the motor windings, or following problems
with the electrical connection between the motor and Nettuno. If this alarm
trips frequently, arrange for the system to be checked by the installer.
E7 –Load not balanced: this alarm may occur if the phase currents of the
motor are unbalanced by more than 25 % of the nominal value.
0)
E8-serial error: this alarm may occur where there is an internal serial
communication on Nettuno. Contact the technical assistance
0)
E9-Pressure limit: the alarm intervenes when the maximum set pressure
threshold has been exceeded. If the error appears repeatedly, check the
setting of the "P limit" parameter. Also check other conditions which may
have caused an overpressure (for example, partial freezing of the fluid).
0)
E10-External error: this alarm will be displayed if, after setting the
external error function on the auxiliary I/O board, the I/O input contact is
.
closed
0)
E11-Number of maximum starts/hour: this error appears if the maximum
number of admissible start-ups per hour has been exceeded. Check for the
presence of any leaks in the system. Check pre-loading of the expansion
0)
.
tank
E12- Error 12V: an anomaly has been detected in the internal low voltage
power supply circuit. Have the manufacturer check the device.
0)
E13-Pressure sensor error: the pressure sensor has detected an incorrect
value. Check or replace the pressure sensor.
0)
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