Danfoss VLT AQUA Programming Manual

Also see for vlt aqua: Instructions Design guide Instruction manual Operating instructions Design guide

Contents

14-53 Fan MonitorOption: Function:[0] Disabled[1] * Warning[2] TripSelect which reaction the frequency converter should take incase a fan fault is detected.14-55 Output FilterOption: Function:[0] * No filter[1] Sine-Wave Filter Select the type of output filter connected. This parameter can-not be adjusted while motor is running.2.13.8. Auto Derate, 14-6*This group contains parameters for derating the frequency converter in case of high temperature.14-60 Function at OvertemperatureOption: Function:[0] Trip[1] * Derate If either heatsink or control card temperature exceeds a pro-grammed temperature limit, a warning will be activated. If thetemperature increases further, select whether the frequencyconverter should trip (trip locked) or derate the output current.Trip [0]: The frequency converter will trip (trip locked) and gen-erate an alarm. Power must be cycled to reset the alarm, butwill not allow restart of the motor until the heat sink temperaturehas dropped below the alarm limit.Derate [1]: If the critical temperature is exceeded the outputcurrent will be reduced until the allowable temperature has beenreached.2.13.9. No Trip at Inverter OverloadIn some pump systems, the frequency converter has not been sized properly to yield the currentneeded in all points of the operational flow-head characteristic. At these points, the pump willneed a current higher than the rated current of the frequency converter. The frequency convertercan yield 110% of the rated current continuously for 60 sec. If still overloaded, the frequencyconverter will normally trip (causing the pump to stop by coasting) and provide an alarm.2. Parameter Description VLT ® AQUA Drive Programming Guide150 MG.20.O2.02 - VLT ® is a registered Danfoss trademark2