Idiomas disponibles
Idiomas disponibles
in nuisance faults . If the pump is installed in a shallow well,
activate the controller and observe system behavior . Once the
controller begins to regulate pressure, check operation at several
flow rates to make sure the default sensitivity does not induce
nuisance Underload trips . If it becomes necessary to desensitize
the Underload trip level, please call of Technical Support at 800-
742-5044 for further details .
UNDERLOAD INTELLIGENT RESET
(Display shows Dry Well Trip)
If a motor Underload fault condition occurs, the most likely cause
is an over-pumped well (dry well) or loss of incoming feed water
to the pump . In a dry well situation to allow the well to recover,
the controller will wait 30 seconds to 5 minutes, determined by
the amount of time the motor had been running before sensing
the dry well, before restarting the motor . For example, the first
time the fault occurs and the pump has been running 6 minutes,
the controller stop the motor and will wait 30 seconds before
attempting to restart the pump . If the system would then run for
2 minutes and an dry well fault recurs, the controller will wait 3
minutes before attempting to restart the pump . This schedule
allows for the minimum off-time possible based on the recovery
time of the well .
If there is an obstruction (such as a closed valve) between the
pump and the pressure switch/transducer, the controller will also
sense an underload deadhead condition stopping the motor to
avoid damaging the pump .
"Intelligent Reset" Recovery Time
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Run T ime (Minutes)
Over Temperature Protection
The controller is designed for full power operation in ambient
temperatures to up to 125°F (50°C) as long as the input voltage
is at 230V . Under severe thermal situations, the controller will
reduce power output by reducing the output frequency in order
to avoid shutting down . Full speed output is restored when the
temperature cools .
External alarm trip terminals
The control is fitted with an Alarm In terminal block on the display
board . Using these terminals, an external control switch can be
wired to the drive . With this connection, an external control such
as an over pressure, under pressure, timer, low level switch, etc .
can be used to trip the drive with an "External Fault" trip . For this
connection to work properly, the Alarm in Relay contact condition
setting in the Advanced Features Menu must be set to match the
switch position to activate the drive . (Example: An irrigation timer
closes a contact to single the drive to run, the Alarm In Relay
setting should be set to NC (Normal Closed) for the drive to be
active during the irrigation cycle .)
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IL1448
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This connection can also be used with the "External Control"
feature in the advanced options menu to put the drive in standby
rather than causing an external fault trip .
Caution: The external control must be a dry contact (i.e. no
voltage applied to the Alarm In terminals of the controller)
to not damage the drive circuit boards. An external control
with voltage can only be used with the controller if an
isolation relay is used in conjunction with the voltage
source. Contact technical support for more information.
Leaky Systems (Pressure Switch Control)
Leaky water systems might keep the controller running due to
the accurate pressure sensing capability of the pressure switch .
Continuous running or starts and stops do not hurt the controller,
pump or motor . However, to reduce the on-time of the controller/
pump/motor, a "Bump-Mode" has been programmed into the
drive . During very low flow (or leaky) conditions this feature
periodically increases the speed of the pump so the pressure
increases several PSI above the set point which allows the
controller to shut off the pump sooner . This adds some time to
bleed off before the system starts up again . This "Bump-Mode"
can be turned off or adjusted if desired . Please call Technical
Support at 800-742-5044 for further details .
Fill Pipe Mode (Transducer Control)
At initial power up, the drive is automatically in the Fill Pipe Mode
for 3 minutes . This allows a new installed system to fill the pipe
and build up pressure without having the pump trip out because
it is sensing low pressure . If additional time is needed, this mode
can be turned back on and the time increased in Parameter
menu #7 .
Overpressure protection (Transducer Control)
The control has two safeguards against over pressurizing
the plumbing system . In Parameter menu #1, there is an
overpressure setpoint available . This setpoint turns off the output
of the drive when the pressure measured by the transducer
reaches the PSI selected above the system setpoint and puts the
drive in standby . When the pressure drops below the drawdown
setpoint, the drive will begin regulating the system pressure .
Additionally, if the pressure measured by the transducer
reaches 85% of the transducer range (85PSI for a 100 PSI
8
range transducer), the drive will trip out with a fault code of
"Overpressure" . This fault condition will be recorded in the trip
log .
Use of Engine Drive Generators
There are several technical issues that go into correct sizing of a
generator for use with a VFD controller . Since the VFD is a "non-
linear load", the generator needs to be oversized considerably for
proper operation . Listed below is minimum recommended sizing
of a generator for each drive rating if the VFD controller is the
only load on the generator . Because of the variation in design of
voltage controls used in generators, the generator manufacture
should always be contacted to verify the correct sizing when
used with a VFD controller . For best results when used with
a generator in the Advanced Features Menu the Powered by
Generator option needs to be set to "Yes".
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