Danfoss VLT AQUA Drive FC 200 Operating Instructions Manual page 93

How to Programme the Low Ha...
22-23 No-Flow Function
Common actions for Low Power Detection and Low Speed
Detection (Individual selections not possible).
Option:
[0] Off
*
[1] Sleep Mode The frequency converter will enter Sleep Mode
[2] Warning
6 6
[3] Alarm
NOTE
Do not set 14-20 Reset Mode, to [13] Infinite auto reset,
when 22-23 No-Flow Function is set to [3] Alarm. Doing so
will cause the frequency converter to continuously cycle
between running and stopping when a No Flow 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 [3] Alarm is selected as the
No-Flow Function.
22-24 No-Flow Delay
Range:
10 s [1 - 600 s] Set the time Low Power/Low Speed must stay
*
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
[0] Off
*
[1] Warning
[2] Alarm
92
VLT AQUA Low Harmonic Drive Operating Instructions
Function:
and stop when a No Flow condition is
detected. See parameter group 22-4* for
programming options for Sleep Mode.
The frequency converter will continue to run,
but activate a No-Flow Warning [W92]. A drive
digital output or a serial communication bus
can communicate a warning to other
equipment.
The frequency converter will stop running and
activate a No-Flow Alarm [A 92]. A frequency
converter digital output or a serial communi-
cation bus can communicate an alarm to
other equipment.
Function:
detected to activate signal for actions. If
detection disappears before run out of the
timer, the timer will be reset.
Function:
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.
The frequency converter will stop running
and activate a Dry pump alarm [A93]. A
MG20T202 - VLT
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
[3] Man. Reset
Alarm
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:
10 s [0 - 600 s] Defines for how long the Dry Pump condition
*
must be active before activating Warning or
Alarm
22-30 No-Flow Power
Range:
0.00 kW [0.00 - 0.00
*
kW]
®
is a registered Danfoss trademark
Function:
frequency converter digital output or a serial
communication bus can communicate an
alarm to other equipment.
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.
Function:
Function:
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.