22-23 No-Flow Function
Option:
Function:
Common actions for low power detection and low speed detection (Individual selections not possi-
ble).
[0] *
OFF
[1]
Sleep Mode
[2]
Warning
Messages in the Local Control Panel display (if mounted) and/or signal via a relay or a digital output.
[3]
Alarm
The adjustable frequency drive trips and the motor stays stopped until reset.
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
Option:
Function:
Low Power Detection
must be Enabled (par.22-21
Low Power Detection
) and commissioned (using
either par. 22-3*,
No Flow Power Tuning
, or par.22-20
Low Power Auto Set-up
) in order to use Dry
Pump Detection.
[0] *
OFF
[1]
Warning
Messages in the Local Control Panel display (if mounted) and/or signal via a relay or a digital output.
[2]
Alarm
The adjustable frequency drive trips and the motor stays stopped until reset.
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 a 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 ad-
justable 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 par.22-30
No-Flow Power
.
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%.
22-32 Low Speed [RPM]
Range:
Function:
0 RPM*
[0 - par. 22-36 RPM]
To be used if par. 0-02
Motor Speed Unit
has been set for RPM (parameter not visible if Hz selected).
Set used speed to the 50% level.
This function is used for storing values needed to tune No-flow Detection.
VLT
®
AQUA Drive
Instruction Manual
8 How to program the adjustable frequency
drive
MG.20.M5.22 - VLT
®
is a registered Danfoss trademark
8-37
8