22-21 Low Power Detection
Option:
Function:
[0]
*
Disabled
[1]
Enabled To set the parameters in parameter group
22-3*
No-Flow Power Tuning
for proper operation, Carry
out the low-power detection commissioning.
22-22 Low Speed Detection
Option:
Function:
[0]
*
Disabled
[1]
Enabled Detects when the motor operates with a speed
as set in
parameter 4-11 Motor Speed Low Limit
or
parameter 4-12 Motor Speed Low Limit
22-23 No-Flow Function
Common actions for low-power detection and low-speed
detection (individual selections not possible).
Option:
Function:
[0]
*
Off
NOTICE
Do not set
,
to
[13] Infinite auto reset
, when
parameter 22-23 No-Flow Function
is set
to
[3] Alarm
. Doing so causes the
frequency converter to continuously
cycle between running and stopping
when a no-flow condition is detected.
NOTICE
Disable the automatic bypass function
of the bypass if:
•
The frequency converter is
equipped with a constant-
speed bypass with an
automatic bypass function
starting the bypass if the
frequency converter
experiences a persistent alarm
condition, and
•
[3] Alarm
is selected as the no-
flow function.
[1]
Sleep
Mode
The frequency converter enters sleep mode
and stops when a no-flow condition is
detected. See parameter group
22-4* Sleep
Mode
for programming options for sleep
mode.
[2]
Warning
The frequency converter continues to run, but
activates a no-flow warning
(Warning 92,
NoFlow)
. A digital output or a serial communi-
cation bus can communicate a warning to
other equipment.
22-23 No-Flow Function
Common actions for low-power detection and low-speed
detection (individual selections not possible).
Option:
Function:
[3]
Alarm
The frequency converter stops running and
activates a no-flow alarm
(Alarm 92, NoFlow)
. A
frequency converter digital output or a serial
communication bus can communicate an
alarm to other equipment.
22-24 No-Flow Delay
Range:
Function:
10 s
*
[1 - 600 s] Set the time that low power/low speed must
stay detected to activate signal for actions. If
detection disappears before the timer runs
out, the timer is reset.
Parameter Descriptions
VLT
®
HVAC Drive FC 102
162
Danfoss A/S © 03/2015 All rights reserved.
MG11CE02
3
3
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