Danfoss VLT Automation VT Drive FC 322 Programming Manual page 166

2 Parameter Description
14-52 Fan Control
Option:
[0] * Auto
2
[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
14-53 Fan Monitor
Option:
[0] Disabled
[1] * Warning
[2] Trip
2.13.8 14-6* Auto Derate
This group contains parameters for derating the frequency converter in case of high temperature.
14-60 Function at Overtemperature
Option:
[0] Trip
[1] * Derate
164
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Function:
Select the minimum speed of the main fan.
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.
Function:
Select which reaction the frequency converter should take in case a fan fault is detected.
Function:
Select which reaction the frequency converter should take in case a fan fault is detected.
Function:
If either heatsink or control card temperature exceeds a 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
[0]: 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 [1]: If the critical temperature is exceeded the output current will be reduced until the al-
lowable temperature has been reached.
MG.20.W1.22 - VLT is a registered Danfoss trademark
VLT Automation VT Drive FC322
Programming Guide