NOTE
It is important that the
4-13 Motor Speed High Limit [RPM]
or
4-14 Motor Speed High Limit [Hz]
is set to the max.
operational speed of the motor!
It is important to do the Auto Set-up before configuring
the integrated PI Contoller as settings will be reset when
changing from Closed to Open Loop in
NOTE
Carry out the tuning with the same settings in
1-03 Torque
Characteristics
, as for operation after the tuning.
22-21 Low Power Detection
Option:
Function:
[0]
*
Disabled
[1]
Enabled If selecting Enabled, the Low Power Detection
commissioning must be carried out in order to
set the parameters in parameter group 22-3* for
proper operation!
22-22 Low Speed Detection
Option:
Function:
[0]
*
Disabled
[1]
Enabled Select Enabled for detecting when the motor
operates with a speed as set in
or
.
22-23 No-Flow Function
Common actions for Low Power Detection and Low Speed
Detection (Individual selections not possible).
Option:
Function:
[0]
*
Off
[1]
Sleep Mode The frequency converter will enter Sleep Mode
and stop when a No Flow condition is
detected. See parameter group 22-4* for
programming options for Sleep Mode.
[2]
Warning
The frequency converter will continue to run,
but activate a No-Flow Warning [W92]. A drive
digital output or a serial communication bus
can communicate a warning to other
equipment.
[3]
Alarm
The frequency converter will stop running and
activate a No-Flow Alarm [A 92]. A frequency
converter digital output or a serial communi-
cation bus can communicate an alarm to
other equipment.
NOTE
Do not set
14-20 Reset Mode
, to
[13] Infinite auto reset
,
when
is set to
[3] Alarm
. Doing so
will cause the frequency converter to continuously cycle
between running and stopping when a No Flow condition
is detected.
NOTE
If the frequency converter is equipped with a constant
speed bypass with an automatic bypass function that starts
the bypass if the frequency converter 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 frequency converter will continue to run, but
activate a Dry pump warning [W93]. A frequency
converter digital output or a serial communi-
cation bus can communicate a warning to other
equipment.
[2]
Alarm
The frequency converter will stop running and
activate a Dry pump alarm [A93]. A frequency
converter digital output or a serial communi-
cation bus can communicate an alarm to other
equipment.
NOTE
Low Power Detection
must be Enabled (
) and commissioned (using either parameter
group 22-3*,
No Flow Power Tuning
, or
) in order to use Dry Pump Detection.
NOTE
Do not set
14-20 Reset Mode
, to
[13] Infinite auto reset
,
when
is set to
[2] Alarm
. Doing so
will cause the frequency converter to continuously cycle
between running and stopping when a Dry Pump
condition is detected.
Parameter Description
VLT
®
Refrigeration Drive Programming Guide
130
MG16H102 - VLT
®
is a registered Danfoss trademark
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