Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 100

How to Programme
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.
22-24 No-Flow Delay
Range:
10 s [1 - 600 s] Set the time that low power/low speed must
*
6 6
22-26 Dry Pump Function
Select desired action for dry pump operation.
Option:
[0] Off
*
[1] Warning
[2] Alarm
[3] Man. Reset
Alarm
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-flow Power Tuning No
Flow Power Tuning, or 22-20 Low Power Auto Set-
up.
NOTICE
Do not set 14-20 Reset Mode to [13] Infinite 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.
98
Operating Instructions
Function:
stay detected to activate signal for actions. If
detection disappears before the timer runs
out, the timer is reset.
Function:
The frequency converter continues to run,
but activates a dry pump warning [W93]. A
frequency converter digital output or a serial
communication bus can communicate a
warning to other equipment.
The frequency converter stops running and
activates a dry pump alarm [A93]. A
frequency converter digital output or a serial
communication bus can communicate an
alarm to other equipment.
The frequency converter stops running and
activates a dry pump alarm [A93]. A
frequency converter digital output or a serial
communication bus can communicate an
alarm to other equipment.
Danfoss A/S © 08/2014 All rights reserved.
NOTICE
For frequency converters with constant-speed
bypass
If an automatic bypass function starts the bypass at
persistent alarm conditions, disable the bypass's
automatic bypass function, if [2] Alarm or [3] Man. Reset
Alarm is selected as the dry-pump function.
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 setting overrides any wake-
up conditions.
22-42 Wake-up Speed [RPM]
Range: Function:
Size [ par. To be used if 0-02 Motor Speed Unit has
related 4-11 - been set for RPM (parameter not visible if
*
par. 4-13 Hz is selected). Only to be used if
RPM] parameter 1-00 Configuration Mode is set for
open loop and an external controller
applies speed reference.
Set the reference speed at which the sleep
mode should be cancelled.
22-60 Broken Belt Function
Selects the action to be performed if the broken-belt condition is
detected
Option: Function:
[0] Off
*
[1] Warning The frequency converter continues to run, but
activates a broken-belt warning [W95]. A
frequency converter digital output or a serial
communication bus can communicate a warning
to other equipment.
[2] Trip The frequency converter stops running and
activates a broken-belt alarm [A 95]. A frequency
converter digital output or a serial communi-
cation bus can communicate an alarm to other
equipment.
NOTICE
Do not set 14-20 Reset Mode, to [13] Infinite auto reset,
when parameter 22-60 Broken Belt Function is set to [2]
Trip. Doing so causes the frequency converter to contin-
uously cycle between running and stopping when a
broken-belt condition is detected.
MG11F502