Technical information

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
Select desired action for dry pump operation.
Option: Function:
[0] * Off
[1] Warning The frequency converter will continue to
run, but activate a Dry pump warning [W93].
A frequency converter digital output or a
serial communication bus can communicate
a warning to other equipment.
[2] Alarm The frequency converter will stop running
and activate a Dry pump alarm [A93]. A
frequency converter digital output or a serial
communication bus can communicate an
alarm to other equipment.
[3] Man. Reset
Alarm
The frequency converter will stop running
and activate a Dry pump alarm [A93]. A
frequency converter digital output or a serial
communication bus can communicate an
alarm to other equipment.
NOTE
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.
NOTE
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 frequency converter to continuously cycle
between running and stopping when a Dry Pump
condition is detected.
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
3.20.2 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 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
16-10 Power [kW] or 16-11 Power [hp] 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
16-10 Power [kW] or 16-11 Power [hp] in Main
Menu. Note the power read
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
NOTE
Set 1-03 Torque Characteristics before tuning takes place.
22-30 No-Flow Power
Range: Function:
0.00 kW* [0.00 - 0.00
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
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%.
Parameter Description
VLT
®
HVAC Drive Programming Guide
150 MG11CD02 - VLT
®
is a registered Danfoss trademark
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