Nastec Vasco V409 - Page 33

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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, the
inverter stops the pump. The device tries to
run the pump every 10, 20, 40, 80, 160 minutes
and then the pump is stopped.
WARNING: if dry running protection occurs, the
device will try to start the pump automatically.
Be sure to cut power supply before performing
any maintenance.
SENSOR FAULT
Sensor error
 Check the transducer
 Check the wiring of transducer
MAX. VALUE ALARM
Measured value has reached the maximum
value accepted by the system.
 Check possible causes of reaching max
value
 Check the max alarm value setting
MIN. VALUE ALARM
Measured value has reached the lowest
value accepted by the system.
 Check possible causes reaching min value
(i.e. broken pipe, open pressure relief valve,
etc.)
 Check the min alarm value setting.
IGBT TRIP ALARM
The current drawn by the load exceeds the
capacity of the inverter.
Then unit is still able to continue to power
the load for 10 minutes with an output
current of 101% of nominal and for 1
minute with an output current of 110% of
nominal
 Increase the ramp-up time
 Make sure that the load current is at least
10% below the nominal current
 Check the voltage drop along the supply
cable to the motor
NO
COMMUNICATION
Communication between Master and
slave(s) has been interrupted
 Check the wiring connections
 Make sure the Master is not in the Menu
level; if so, exit from the level.
 In the STATUS of the slave (where the alarm
is displayed) try to reset the alarm by
pushing STOP button.
ADDRESS ERROR
Same address as other units in the group
 The address of each unit needs to be
different
KEYBOARD FAULT
A Button on the keyboard has been
pressed for more than 150 seconds
 Make sure buttons are not depressed
 Call service assistance
ACTIVE DIG.IN.X
Digital input X opened /closed
 Check the input digital configuration
(IN/OUT Parameters menu )
ALARM SLAVE XX
slave XX error detected by master
 check the status of the slave