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22-24 No-Flow Delay
Range:
Function:
10 s*
[1 - 600 s]
Set the time Low Power/Low Speed must stay detected to activate signal for actions. If detection
disappears before run out of the timer, the timer will be reset.
22-26 Dry Pump Function
Option:
Function:
Low Power Detection
must be Enabled (par.22-21
) and commissioned (using
either par. 22-3*,
No Flow Power Tuning
, or par.22-20
) 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 frequency converter trips and 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 Warning or Alarm
22-28 No-Flow Low Speed [RPM]
Range:
Function:
0*
[Motor Min. Speed - Motor Max.
Speed]
Used to set the speed for no-flow low speed detection.
If a low speed detection at a speed different from the motor minimum speed is needed, this pa-
rameter may be used.
22-29 No-Flow Low Speed [Hz]
Range:
Function:
0*
[Motor Min. Speed - Motor Max.
Speed]
Used to set the speed for no-flow low speed detection.
If a low speed detection at a speed different from the motor minimum speed is needed, this pa-
rameter may be used.
2.19.3 22-3* No-Flow Power Tuning
Tuning Sequence, if not choosing
Auto Set Up
in par.22-20
1.
Close the main valve to stop flow
2.
Run with motor until the system has reached normal operating temperature
3.
Press Hand On button on the LCP and adjust speed for approx. 85% of rated speed. Note the exact speed
4.
Read power consumption either by looking for actual power in the data line in the LCP or call par.16-10
or par.16-11
Main Menu. Note the power read out
5.
Change speed to approx. 50% of rated speed. Note the exact speed
6.
Read power consumption either by looking for actual power in the data line in the LCP or call par.16-10
or par.16-11
Main Menu. Note the power read
7.
Program the speeds used in par.22-32
8.
Program the associated power values in par.22-34
9.
Switch back by means of
Auto On
or
Off
2 Parameter Description
VLT
®
AQUA Drive Programming Guide
186
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
2