Danfoss VLT AQUA Drive FC 200 Programming Manual page 152

Parameter Description
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
3 3
[0] OFF
[1] Warning
[2] Alarm
[3] Man. Reset
Alarm
NOTICE!
Low Power Detection must be Enabled (22-21 Low Power
Detection) and commissioned (using either parameter
group 22-3*, No-Flow Power Tuning, or 22-20 Low Power
Auto Set-up) in order to use Dry Pump Detection.
NOTICE!
Do not set 14-20 Reset Mode, to [13] Infinite auto reset,
when 22-26 Dry Pump Function is set to [2] Alarm. Doing so
will cause the adjustable frequency drive to continuously
cycle between running and stopping when a dry pump
condition is detected.
NOTICE!
If the adjustable frequency drive is equipped with a
constant speed bypass with an automatic bypass function
that starts the bypass if the adjustable frequency 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:
10 s [0 - 600 s] Defines for how long the Dry Pump condition
*
3-126
VLT
Function:
The adjustable frequency drive will continue
to run but activate a Dry Pump warning
[W93]. An adjustable frequency drive digital
output or a serial communication bus can
communicate a warning to other equipment.
The adjustable frequency drive will stop
running and activate a Dry Pump alarm [A93].
An adjustable frequency drive digital output
or a serial communication bus can
communicate an alarm to other equipment.
The adjustable frequency drive will stop
running and activate a Dry Pump alarm [A93].
An adjustable frequency drive digital output
or a serial communication bus can
communicate an alarm to other equipment.
Function:
must be active before activating Warning or
Alarm
MG20O622 - VLT
®
AQUA Drive Programming Guide
22-28 No-Flow Low Speed [RPM]
Range:
Size related
*
22-29 No-Flow Low Speed [Hz]
Range:
Size related
*
3.19.3 22-3* No-Flow Power Tuning
Tuning Sequence, if not choosing Auto Set-up in 22-20 Low
Power Auto Set-up:
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
16-10 Power [kW] or 16-11 Power [hp] in the Main
Menu. Note the power readout.
5. Change the 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
16-10 Power [kW] or 16-11 Power [hp] in the Main
Menu. Note the power readout.
7. Program the speeds used in 22-32 Low Speed
[RPM], 22-33 Low Speed [Hz], 22-36 High Speed
[RPM] and 22-37 High Speed [Hz].
8. Program the associated power values in
22-34 Low Speed Power [kW], 22-35 Low Speed
Power [HP], 22-38 High Speed Power [kW] and
22-39 High Speed Power [HP].
9. Switch back by means of [Auto On] or [Off].
NOTICE!
Set 1-03 Torque Characteristics before tuning takes place.
®
is a registered Danfoss trademark
Function:
[ par. 4-11 - Used to set the speed for no-flow
par. 4-13 low speed detection.
RPM] If a low speed detection at a speed
different from the motor minimum
speed is needed, this parameter
may be used.
Function:
[ par. 4-12 - Used to set the speed for no-flow
par. 4-14 Hz] low speed detection.
If a low speed detection at a speed
different from the motor minimum
speed is needed, this parameter
may be used.