Danfoss VLT AHF 005 Programming Guide

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
[RPM] or parameter 4-12 Motor Speed Low Limit
[Hz].
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.
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-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 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
33

Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English