Operating instructions

22-26 Dry Pump Function
Select desired action for dry pump operation.
Option: Function:
[0] * Off
[1] Warning The drive will continue to run, but activate a
Dry pump warning [W93]. A drive digital
output or a serial communication bus can
communicate a warning to other equipment.
[2] Alarm The drive will stop running and activate a Dry
pump alarm [A93]. A drive digital output or a
serial communication bus can communicate
an alarm to other equipment.
[3] Man. Reset
Alarm
The drive will stop running and activate a Dry
pump alarm [A93]. A drive digital output or a
serial communication bus can communicate
an alarm to other equipment.
NOTE
Low Power Detection must be Enabled (par. 22-21 Low
Power Detection) and commissioned (using either
parameter group 22-3*, No Flow Power Tuning, or
par. 22-20 Low Power Auto Set-up) in order to use Dry
Pump Detection.
NOTE
Do not set par. 14-20 Reset Mode, to [13] Infinite auto
reset, when par. 22-26 Dry Pump Function is set to [2]
Alarm. Doing so will cause the drive to continuously
cycle between running and stopping when a Dry Pump
condition is detected.
NOTE
If the drive is equipped with a constant speed bypass
with an automatic bypass function that starts the bypass
if the 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: 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
par. 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
par. 16-10 Power [kW] or par. 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
par. 16-10 Power [kW] or par. 16-11 Power [hp] in
Main Menu. Note the power read
7. Program the speeds used in par. 22-32 Low Speed
[RPM], par. 22-33 Low Speed [Hz], par. 22-36 High
Speed [RPM] and par. 22-37 High Speed [Hz]
8. Program the associated power values in
par. 22-34 Low Speed Power [kW], par. 22-35 Low
Speed Power [HP], par. 22-38 High Speed Power [kW]
and par. 22-39 High Speed Power [HP]
9. Switch back by means of Auto On or Off
NOTE
Set par. 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 consid-
er 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%.
Parameter Description
VLT
®
HVAC Drive Programming Guide
142 MG.11.CA.02 - VLT
®
is a registered Danfoss trademark
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