NOTE
If the frequency converter is equipped with a constant
speed bypass with an automatic bypass function that starts
the bypass if the frequency converter 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
3.17.2 22-3* No-Flow Power Tuning
Tuning Sequence, if not choosing
Auto Set Up
in
1.
Close the main valve to stop flow.
2.
Run with motor until the system has reached
normal operating temperature.
3.
Press [Hand On] 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
or
in 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
or
in Main
Menu. Note the power read.
7.
Program the speeds used in
,
and
.
8.
Program the associated power values in
and
9.
Switch back by means of [Auto On] or [Off].
NOTE
Set
1-03 Torque Characteristics
before tuning takes place.
22-30 No-Flow Power
Range:
Function:
0 kW
*
[0 - 1000
kW]
Read out of calculated No Flow power at
actual speed. If power drops to the display
value the frequency converter 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%.
22-32 Low Speed [RPM]
Range:
Function:
Size
related
*
[ 0 - par.
22-36 RPM]
To be used if
has been set for RPM (parameter not
visible if Hz selected).
Set used speed for the 50% level.
This function is used for storing values
needed to tune No Flow Detection.
22-33 Low Speed [Hz]
Range:
Function:
Size
related
*
[ 0 - par.
22-37 Hz]
To be used if
has been set for Hz (parameter not
visible if RPM selected).
Set used speed for the 50% level.
The function is used for storing values
needed to tune No Flow Detection.
22-34 Low Speed Power [kW]
Range:
Function:
Size
related
*
[ 0 - 0.00
kW]
To be used if
has
been set for International (parameter
not visible if North America selected).
Set power consumption at 50% speed
level.
This function is used for storing values
needed to tune No Flow Detection.
22-35 Low Speed Power [HP]
Range:
Function:
Size
related
*
[ 0 - 0.00
hp]
To be used if
has
been set for North America (parameter
not visible if International selected).
Set power consumption at 50% speed
level.
This function is used for storing values
needed to tune No Flow Detection.
Parameter Description
VLT
®
Refrigeration Drive Programming Guide
MG16H102 - VLT
®
is a registered Danfoss trademark
131
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