Nastec VASCO - Page 25

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OVER PRESSURE
Measured pressure value has reached the
maximum pressure accepted by the system.
 Check possible causes of reaching max
pressure
 Check the max pressure value setting
UNDER PRESSURE
Measured pressure value has reached the
lowest pressure accepted by the system.
 Check possible causes reaching min pressure
(i.e. broken pipe, open pressure relief valve,
etc.)
 Check the min pressure value setting.
OVERLOAD INV.
The current drawn by the load exceeds the
capacity of VASCO.
VASCO 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 VASCO 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 VASCOs in the group
 The address of each VASCO 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
DIGITAL INPUT
Digital input opened /closed
 Check the input digital configuration (under
Installer Parameters menu )
ALARM SLAVE XX
slave XX error detected by master
 check the status of the slave
If pumps cosphi is lower than the dry-running cosphi for at least 2 seconds, VASCO will stop the
pump. VASCO will try to run the pump every 10, 20, 40, 80, 160 minutes and then the pump is
stopped.
ATTENTION: if dry-running protection occurs, VASCO will try to start the pump automatically.
Be sure to cut power supply before attempting maintenance
VASCO will stop the pump if the input motor current is higher than the set motor current for an
extended time. By pressing the START button it is possible to run the pump again.
VASCO will stop the pump if the input voltage is higher than the set voltage for an extended
time. By pressing the START button it is possible to run the pump again. VASCO will stop the
pump if the input voltage is lower than the set voltage for an extended time. By pressing the
START button it is possible to run the pump again.