Danfoss VLT 6000 HVAC Series User Manual

403 Sleep mode timer
(SLEEP MODE TIMER)
Value:
0 - 300 sec. (301 sec. = OFF)
OFF
Function:
This parameter enables the frequency converter to
stop the motor if the load on the motor is minimal. The
timer in parameter 403 Sleep mode timer starts when
the output frequency drops below the frequency set in
parameter 404 Sleep frequency.
When the time set in the timer has expired, the fre-
quency converter will turn off the motor.
The frequency converter will restart the motor, when
the theoretical output frequency exceeds the frequen-
cy in parameter 405 Wake up frequency.
Description of choice:
Select OFF if this function is not wanted. Set the
threshold value that is to activate Sleep mode after the
output frequency has fallen below parameter 404
Sleep frequency.
404 Sleep frequency
(SLEEP FREQUENCY)
Value:
000,0 - par. 405 Wake up frequency
0.0 Hz
Function:
When the output frequency falls below the preset val-
ue, the timer will start the time count set in parameter
403 Sleep mode. The present output frequency will fol-
low the theoretical output frequency until f
MIN
is
reached.
Description of choice:
Set the required frequency.
405 Wake up frequency
(WAKEUP FREQUENCY)
Value:
Par 404 Sleep frequency - par. 202 f
MAX
50 Hz
Function:
When the theoretical output frequency exceeds the
preset value, the frequency converter restarts the mo-
tor.
Description of choice:
Set the required frequency.
406 Boost setpoint
(BOOST SETPOINT)
Value:
1 - 200 %
100 % of setpoint
Function:
This function can only be used if Closed loop has been
selected in parameter 100.
In SYSTEMs with constant pressure regulation, it is
advantageous to increase the pressure in the SYS-
TEM before the frequency converter stops the motor.
This extends the time during which the frequency con-
verter stops the motor and helps to avoid frequent
starting and stopping of the motor, e.g. in the case of
leaks in the water supply SYSTEM.
Use Boost Time-Out, par. 472, to set the boost time-
out. If the boost set-point cannot be reached within the
specified time, the frequency converter will continue in
normal operation (Not entering sleep mode).
Description of choice:
Set the required Boost setpoint as a percentage of the
resulting reference under normal operation. 100% cor-
responds to the reference without boost (supplement).
407 Switching frequency
(SWITCHING FREQ.)
Value:
Depends on the size of the unit.
Function:
The preset value determines the switching frequency
of the inverter, provided Fixed switching frequency [1]
has been selected in parameter 408 Interference re-
duction method. If the switching frequency is changed,
this may help to minimise possible acoustic noise from
the motor.
NB!
The output frequency of the frequency
converter can never assume a value high-
er than 1/10 of the switching frequency.
Description of choice:
When the motor is running, the switching frequency is
adjusted in parameter 407 Switching frequency, until
the frequency has been achieved at which the motor
is as quiet as possible.
VLT
®
6000 HVAC Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
142 MG.61.B5.02 - VLT
®
is a registered Danfoss trademark

Danfoss VLT 6000 HVAC Series Specifications

General

Brand	Danfoss
Model	VLT 6000 HVAC Series
Category	DC Drives
Language	English