No-Flow Function; No-Flow Delay; Dry Pump Function - Danfoss VLT Programming Manual

3 Parameter Description

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
[2] Warning
3
[3] Alarm
NB!
Do not set par. 14-20
the drive to continuously cycle between running and stopping when a No Flow condition is detected.
NB!
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 [3] Alarm is selected as the No-Flow Function.

22-24 No-Flow Delay

Range:
10 s* [1 - 600 s]

22-26 Dry Pump Function

Select desired action for dry pump operation.
Option:
[0] * Off
[1] Warning
[2] Alarm
[3] Man. Reset Alarm
NB!
Low Power Detection
Flow Power Tuning
NB!
Do not set par. 14-20
cause the drive to continuously cycle between running and stopping when a Dry Pump condition is detected.
NB!
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.
204
Function:
The drive will enter Sleep Mode and stop when a No Flow condition is detected. See parameter
group 22-4* for programming options for Sleep Mode.
The drive 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 drive will stop running and activate a No-Flow Alarm [A 92]. A drive digital output or a serial
communication bus can communicate an alarm to other equipment.
Reset Mode , to [13] Infinite auto reset, when par. 22-23
Function:
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.
Function:
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.
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.
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.
Low Power Detection
must be Enabled (par. 22-21
, or par. 22-20 Low Power Auto Set-up
Reset Mode , to [13] Infinite auto reset, when par. 22-26
MG.11.C9.02 - VLT
®
VLT
No-Flow Function
) and commissioned (using either parameter group 22-3*,
) in order to use Dry Pump Detection.
Dry Pump Function
® is a registered Danfoss trademark
HVAC Drive Programming Guide
is set to [3] Alarm. Doing so will cause
No
is set to [2] Alarm. Doing so will