RO
EN
39
ALARMS
In the event of system anomalies or malfunctions, one of the following screens will appear on Nettuno display. Each error is coded with
the letter "E" followed by a number from 0 to 13. The number which appears in brackets represents the number of recurrences of each
error. To reset an alarm, after having resolved the cause, it usually sufficient to press the central "reset" key or interrupt the electrical power
supply for a few seconds.
E0 – Low voltage
:
indicates that the power supply voltage is too low. Check the input voltage value
E1 – High voltage
:
indicates that the power supply voltage is too high. Check the input voltage value
E2 - Short Circuit:
This message will appear on the screen when a short circuit is detected on inverter
output; this may occur following incorrect connections of the electric motor, damage to the electrical
insulation in the wires connecting the electric pump to the device or a fault in the pump's electric motor.
When this error appears, the electrical system should be checked as soon as possible by skilled personnel.
The error may only be removed by disconnecting the equipment from the electrical power source and
resolving the cause of the fault. Attempting to restart the inverter in the presence of a short-circuit in output may cause serious damage to
the equipment and be a source of danger to the user.
E3 - Dry running
:
this message appears when the system is stopped following a pump intake water
shortage. If the auto-reset function has been enabled,
Nettuno
will carry out automatic attempts to check
for the availability of water. To clear the error status, press the central “reset” key.
E4 – Ambient temperature
:
the error appears if the maximum internal ambient temperature of the
inverter is exceeded
.
Check the conditions of operation of the inverter.
E5-IGBT module over temperature
:
the error appears if the maximum temperature of the IGBT module
of the inverter is exceeded. Check operating conditions of the inverter, and in particular the cleanliness of
the forced air ventilation system, the current absorption of the pump and the ambient temperature. If
necessary, attempt to reduce the switching frequency.
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 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.
E8-serial error:
this alarm may occur where there is an internal serial communication on Nettuno.
Contact the technical assistance.
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).
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.
E0 Input voltage
Low ( 0)
E1 Input voltage
high ( 0)
E2 Output Short
circuit ( 0)
E3 Pump dry
Running ( 0)
E4 Ambient over
temp.
( 0)
E5 Module over
Temp ( 0)
E6 Motor over
Load ( 0)
E7 Unbalanced
Load ( 0)
E8 Internal ser.
Error ( 0)
E9 Over pressure
Error ( 0)
E10 External
error ( 0)