Nastec VASCO - Protections and Alarms

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7. Protections and alarms
Anytime a protection occurs a blinking message is displayed together with an audible alarm; on STATUS in the initial view, the
protection is displayed; by pressing the STOP button. Only from this position (STATUS) in the initial view is it possible to try
to reset the alarm; if VASCO does not reset the alarm it is displayed again together an audible sound.
ALARM MESSAGE
ALARM DESCRIPTION
POSSIBILE SOLUTIONS
OVERCURRENT MOT.
Motor overload: input current of the motor
is higher than the rated motor current
setting parameter.
Motor voltage drop caused by the inverter
causes the motor input current to be higher
than rated. Contact motor manufacturer to
check if motor is capable of accepting this
current.
 Make sure that the motor current setting
parameter is higher than rated.
 Check other possible causes of over current
UNDER VOLTAGE
Supply voltage too low
Check possible causes of undervoltage
OVER VOLTAGE
Supply voltage too high
Check possible causes of overvoltage
OVER TEMP. INV.
Inverter over temperature
 Make sure than ambient temperature is less
than 40 °C (104 °F).
 Check if auxiliary cooling fan is working
properly and if mounting space is adequate
for proper cooling.
 Reduce the PWM value (Advance Parameter
Menu)
NO LOAD
No load
 Check if load is properly connected to the
VASCO terminals
NO WATER
(DRY RUN COSPHI)
Motor cosphi is lower than the set value of
dry running cosphi
 Check if the pump is primed
 Check the set value of dry running cosphi.
Dry running cosphi is approximately 60% of
the rated cosphi (at rated frequency) listed
on the motor plate.
If pump’s cosphi is lower than the set dry-
running cosphi for at least 2 seconds, VASCO
stops the pump. VASCO tries to run the pump
every 10, 20, 40, 80, 160 minutes and then the
pump is stopped.
WARNING: if dry running protection occurs,
VASCO will try to start the pump automatically.
Be sure to cut power supply to VASCO before
performing any maintenance.
PRESS.SENS.FAULT
Pressure sensor error
 Check the pressure transducer
 Check the wiring of transducer
FLOW SENS. FAULT
flow sensor error
 Check the flow transducer
 Check the wiring of transducer
TEMP. SENS. FAULT
temperature sensor error
 Check the temperature transducer
 Check the wiring of transducer