NOTE
Do not set par. 14-20
Reset Mode
, to [13] Infinite auto
reset, when par. 22-23
No-Flow Function
is set to [3]
Alarm. Doing so will cause the drive to continuously
cycle between running and stopping when a No Flow
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 [3] Alarm is selected as the No-Flow Function.
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 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
22-40 Minimum Run Time
Range:
Function:
10 s
*
[0 - 600 s] Set the desired minimum running time for the
motor after a start command (digital input or
Bus) before entering Sleep Mode.
22-41 Minimum Sleep Time
Range:
Function:
10 s
*
[0 - 600 s] Set the desired Minimum Time for staying in
Sleep Mode. This will override any wake up
conditions.
22-42 Wake-up Speed [RPM]
Range:
Function:
Application
dependent
*
[Applica-
tion
dependant]
To be used if par. 0-02
Motor Speed Unit
has been set for RPM (parameter not
visible if Hz selected). Only to be used if
par. 1-00
Configuration Mode
is set for
Open Loop and speed reference is
applied by an external controller.
Set the reference speed at which the
Sleep Mode should be cancelled.
22-43 Wake-up Speed [Hz]
Range:
Function:
Application
depend-
ent
*
[Applica-
tion
dependant]
To be used if par. 0-02
Motor Speed Unit
,
has been set for Hz (parameter not
visible if RPM selected). Only to be used
if par. 1-00
Configuration Mode
, is set for
Open Loop and speed reference is
applied by an external controller
controlling the pressure.
Set the reference speed at which the
Sleep Mode should be cancelled.
How to Programme the Frequ...
VLT
®
HVAC Drive Operating Instructions
90
MG.11.AD.02 - VLT
®
is a registered Danfoss trademark
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