appendIxSupply Fan Failure CodesHLL = Hall Sensor ErrorFirst occurrence:Power fluctuations may be responsible.Corrective: Reset the failure; re-start the motor and observe it. If applicable, filter out the source of the disturbing voltage.Repeated occurrence:Question: Do other fans show the same failure?Yes: Systematically search for voltage peaksNo: It seems to be a hardware problem of the fan Fan need to be replacedTFEI = Electronics Interior OverheatedFirst occurrence:Too high ambient temperature may be responsibleQuestion: • Could ambient temperature have been too high?• Is it possible to connect the fan to EC Control in order to display the temperature? If so, is the displayedtemperature within the expected temperature range?Corrective: If the displayed temperature is above 95°C (the electronics switches off at 105°C,) double-check the ambienttemperature in each operating modeReset the failure; re-start the motor and observe itRepeated occurrence:Question: Do other fans show the same failure?Yes: Systematically search for the cause of excessive ambient temperature Perhaps use a data logger or read outthe electronics temperature via EC ControlNo: It seems to be a hardware problem of the fan Fan need to be replacedTFM = Motor OverheatedFirst occurrence:Excessive ambient temperature may be responsibleQuestion: Could ambient temperature have been too high? Or is the motor overloaded?• Is it possible to connect the fan to EC Control in order to display the motor temperature?• Is the displayed temperature within the expected temperature range?Corrective: If the displayed temperature is too high:• Double-check the motor temperature in each operating mode• Check of the fan load: Measure the input power at max load/ operating point and compare the measured valuewith nominal data on the label Is there any discrepancy?• Reset the failure; re-start the motor and observe itRepeated occurrence:Question: Do other fans show the same failure?Yes: systematically search for the cause of excessive ambient temperature Perhaps use a data logger or read outthe electronics temperature via EC ControlNo: It seems to be a hardware problem of the fan Fan need to be replacedOM 1141-3 • MICROTECH UNIT CONTROLLER 154 wwwappendIx
