22-23 No-Flow Function
Common actions for Low Power Detection and Low Speed
Detection (Individual selections not possible).
Option:
Function:
[0]
*
OFF
The drive will not respond to a No Flow
condition.
[1]
Sleep Mode The drive will enter sleep mode and stop
when a No Flow condition is detected. See
parameter group AP-4# for programming
options for sleep mode.
[2]
Warning
The drive will continue to run, but activate a
No-Flow Warning [W92]. A drive digital output
or a serial communication bus can
communicate a warning to other equipment.
[3]
Alarm
The drive will stop running and activate a No-
Flow Alarm [A 92]. A drive digital output or a
serial communication bus can communicate
an alarm to other equipment.
NOTE!
Do not set
14-20 Reset Mode
to [13] Infinite auto reset
when
is set to [3] Alarm. Doing so
will cause the drive to continuously cycle between running
and stopping when a No Flow condition is detected.
NOTE!
If the drive is equipped with a constant speed bypass with
an automatic bypass function that starts the bypass if the
drive experiences a persistent alarm condition, be sure to
disable the bypass’ automatic bypass function, if [3] Alarm
is selected as the No-Flow Function.
22-24 No-Flow Delay
Range:
Function:
10 s
*
[1 - 600 s] Set the time. Low Power/Low Speed must
remain detected to activate signal for actions.
If detection disappears before the timer runs
out, the timer will be reset.
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
Function:
[0]
*
OFF
[1]
Warning The drive will continue to run, but activate a dry
pump warning [W93]. A drive digital output or a
serial communication bus can communicate a
warning to other equipment.
[2]
Alarm
The drive will stop running and activate a dry
pump alarm [A93]. A drive digital output or a
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
Function:
serial communication bus can communicate an
alarm to other equipment.
NOTE!
Low Power Detection
must be Enabled (
) and commissioned (using either parameter
group AP-3#,
No Flow Power Tuning
, or
) in order to use Dry Pump Detection.
NOTE!
Do not set
14-20 Reset Mode
, to [13] Infinite auto reset,
when
is set to [2] Alarm. Doing so
will cause the drive to continuously cycle between running
and stopping when a dry pump condition is detected.
NOTE!
If the drive is equipped with a constant speed bypass with
an automatic bypass function that starts the bypass if the
drive experiences a persistent alarm condition, be sure to
disable the bypass’s automatic bypass function, if [2] Alarm
or [3] Man. Reset Alarm is selected as the dry pump
function.
22-27 Dry Pump Delay
Range:
Function:
10 s
*
[0 - 600 s] Defines for how long the Dry Pump condition
must be active before activating Warning or
Alarm
22-30 No-Flow Power
Range:
Function:
0.00 kW
*
[0.00 - 0.00
kW]
Readout of calculated no-flow power at
actual speed. If power drops to the
display value, the adjustable frequency
drive will consider the condition as a
no-flow situation.
22-31 Power Correction Factor
Range:
Function:
100 %
*
[1 - 400
%]
Make corrections to the calculated power at
If No Flow is detected when it should not be
detected, the setting should be decreased.
However, if No Flow is not detected when it
should be detected, the setting should be
increased to above 100%.
How to program the adjustab...
VLT AQUA 12-Pulse High Power Instruction Manual
6-26
MG.20.Y1.22 - VLT
®
is a registered Danfoss trademark
6
6
