Danfoss vlt FC 102 - Page 203

22-23 No-Flow Function
Common actions for low-power detection and low-speed
detection (individual selections not possible).
Option: Function:
[0] * O
NOTICE
Do not set
parameter 14-20 Reset Mode, to
[13] Innite 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-ow 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-ow
function.
[1] Sleep Mode The frequency converter enters
sleep mode and stops when a no-
ow 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-ow
warning (warning 92, NoFlow). A
digital output or a serial communi-
cation bus can communicate a
warning to other equipment.
[3] Alarm The frequency converter stops
running and activates a no-ow
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
22-24 No-Flow Delay
Range: Function:
activate a signal for actions. If
detection disappears before the
timer runs out, the timer is reset.
22-26 Dry Pump Function
Select the action for dry-pump operation.
Option: Function:
[0] * O
[1] Warning
NOTICE
To use dry-pump detection:
1. Enable low-power
detection in
parameter 22-21 Low
Power Detection.
2. Commission low-
power detection
using either
parameter group 22-3*
No-ow Power Tuning
No Flow Power Tuning,
or
parameter 22-20 Low
Power Auto Set-up.
NOTICE
Do not set
parameter 14-20 Reset Mode to
[13] Innite auto reset, when
parameter 22-26 Dry Pump
Function is set to [2] Alarm.
Doing so causes the frequency
converter to continuously cycle
between running and stopping
when a dry-pump condition is
detected.
NOTICE
For frequency converters with
constant-speed bypass.
If an automatic bypass
function starts the bypass at
persistent alarm conditions,
disable the automatic bypass
function, if [2] Alarm or [3]
Man. Reset Alarm is selected as
the dry-pump function.
The frequency converter continues
to run, but activates a dry-pump
warning (warning 93, Dry pump). A
frequency converter digital output
Parameter Descriptions Programming Guide
M0010001 Danfoss A/S © 10/2019 All rights reserved. 201
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