Name: Danfoss ADAP-KOOL Drive
Brand: Danfoss
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3.11.8 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: 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 con-

verter should trip (trip locked) or derate the output current.

[0] * 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.

[1] Derate If the critical temperature is exceeded the output current will be reduced until the allowable tem-

perature has been reached.

3.11.9 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.

It may be preferable to run the pump at reduced speed for a while in case it is not possible to run continuously with demanded capacity.

Select

Function at Inverter Overload

, par.14-61

Function at Inverter Overload

to automatically reduce pump speed until the output current is below 100%

of the rated current (set in par.14-62

Inv. Overload Derate Current

The

Function at Inverter Overload

is an alternative to letting the frequency converter trip.