Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 112

Parameter Description
14-42 Minimum AEO Frequency
Range:
Size
related Hz]
*
3 3
14-43 Motor Cosphi
Range:
Size [0.40 -
related 0.95]
*
3.12.6 14-5* Environment
NOTICE
Perform a power cycle after changing any of the
parameters in parameter group 14-5* Environment.
These parameters help the frequency converter to operate
under special environmental conditions.
14-50 RFI Filter
Option: Function:
[0] Off Select [0] Off if the frequency converter is fed by an
isolated mains source (IT mains).
If a filter is used, select [0] Off during charging to
prevent a high leakage current making the RCD
switch.
In this mode, the internal RFI filter capacitors between
enclosure and the mains RFI filter circuit are cut out to
reduce the ground capacity currents.
[1] On Select [1] On to ensure that the frequency converter
*
complies with EMC standards.
Illustration 3.42 RFI Filter
110
Function:
NOTICE
[5 - 40
This parameter is not active when
parameter 1-10 Motor Construction is
set to [1] PM non-salient SPM.
Enter the minimum frequency at which
the automatic energy optimization (AEO)
is to be active.
Function:
The Cos(phi) setpoint is automatically set
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.
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®
VLT Refrigeration Drive FC 103
14-51 DC Link Compensation
Option: Function:
[0] Off Disables DC-link compensation.
[1] On
14-52 Fan Control
Option:
[0] Auto
*
[1] On 50%
[2] On 75%
[3] On 100%
[4] Auto (Low
temp env.)
14-53 Fan Monitor
Option:
[0] Disabled
[1] Warning
*
[2] Trip
The rectified AC-DC voltage in the frequency converter's
DC-link is associated with voltage ripples. These ripples
can increase in magnitude with increased load. These
ripples are undesirable because they can generate
current and torque ripples. A compensation method is
used to reduce these voltage ripples in the DC link. In
general, DC-link compensation is recommended for
most applications, but pay attention when operating in
field weakening as it can generate speed oscillations at
the motor shaft. In field weakening, turn off DC-link
compensation.
Enables DC-link compensation.
Function:
Select the minimum speed of the main fan.
Select [0] Auto to run the fan only when the
internal temperature of the frequency
converter is in the range 35 °C (95 °F) to
approximately 55 °C (131 °F). The fan runs at
low speed at 35 °C (95 °F) and at full speed
at approximately 55 °C (131 °F).
Function:
Select the frequency converter action if a fan
fault is detected.
MG16H202