Danfoss VLT Programming Manual page 108

Parameter Description
14-42 Minimum AEO Frequency
Range: Function:
10 Hz [5 - 40 Hz] Enter the minimum frequency at which the
*
Automatic Energy Optimisation (AEO) is to be
active.
14-43 Motor Cosphi
Range: Function:
Size [0.40 - The Cos(phi) setpoint is automatically set
related 0.95 ] for optimum AEO performance during
*
AMA. This parameter should normally not
be altered. However in some situations it
may be necessary to enter a new value to
fine-tune.
3.14.6 14-5* Environment
These parameters help the frequency converter to operate
under special environmental conditions.
14-50 RFI Filter
This parameter is only available for FC 302. It is not relevant to FC
301 due to different design and shorter motor cables.
Option: Function:
[0] Off Select Off [0] only if the frequency converter is fed by an
isolated mains source (IT mains).
In this mode, the internal RFI filter capacitors between
chassis and the mains RFI filter circuit are cut-out to
reduce the ground capacity currents.
[1] On Select On [1] to ensure that the frequency converter
*
complies with EMC standards.
14-51 DC Link Compensation
Option: Function:
[0] Off Disables DC Link Compensation.
[1] On Enables DC Link Compensation.
*
14-52 Fan Control
Option: Function:
Select the minimum speed of the main fan.
[0] Auto Select Auto [0] to run the fan only when the
*
internal temperature of the frequency converter is
in the range +35°C to approximately +55°C. The
fan will run at low speed at +35°C and at full
speed at approximately +55°C.
[1] On 50%
[2] On 75%
[3] On 100%
®
VLT HVAC Drive Programming Guide
14-53 Fan Monitor
Option:
[0]
[1]
[2]
14-55 Output Filter
Option:
[0]
[2]
14-59 Actual Number of Inverter Units
Range:
Size related
3.14.7 14-6* Auto Derate
This group contains parameters for derating the frequency
converter in case of high temperature.
14-60 Function at Over Temperature
Option:
[0]
[1]
3.14.8 No Trip at Inverter Overload
In some pump systems, the frequency converter has not
been sized properly to yield the current needed in all points
of the operational flow-head characteristic. At these points,
the pump will need a current higher than the rated current
of the frequency converter. The frequency converter can
yield 110% of the rated current continuously for 60 sec. If still
overloaded, the frequency converter will normally trip
(causing the pump to stop by coasting) and provide an
alarm.
®
MG.11.CB.02 - VLT is a registered Danfoss trademark
Function:
Select which reaction the frequency converter
should take in case a fan fault is detected.
Disabled
Warning
*
Trip
No Filter
*
Sine Wave Filter Fixed
[1 - 1. ]
*
Function:
If either heatsink or control card temperature
exceeds a factory-programmed temperature limit, a
warning will be activated. If the temperature
increases further, select whether the frequency
converter should trip (trip locked) or derate the
output current.
Trip The frequency converter will trip (trip locked) and
*
generate an alarm. Power must be cycled to reset the
alarm, but will not allow restart of the motor until the
heat sink temperature has dropped below the alarm
limit.
Derate If the critical temperature is exceeded the output
current will be reduced until the allowable
temperature has been reached.
3
Function:
Function:
107
3