‹ General Faults and Alarms Faults and Alarms indicate unsusal inverter / application conditions. An alarm does not necessarily switch of the inverter but a message is displayed on the keypad (i.e. a flashing alarm code) and an alarm output can be generated at the multi-function outputs (H2-01 and H2-02) if programmed. An alarm automatically disappears if the alarm condition is not present any- more. A fault switches the inverter output off immediately, a message is displayed on the keypad and the fault output is switched. The fault must be reset manually after the cause and the RUN signal have been removed. The following table shows a list of faults and alarms with their corrective actions.
EN-21 Display Alarm Fault Meaning Corrective Actions Option Card Communication Alarm After initial communication was established, the connection was lost. Check the connections and all user-side soft- ware configurations. Digital Operator Communication Fault 1/2 • Communication fault between Operator and Inverter • CPU External RAM Fault • Disconnect the Digital Operator and then connect it again. • Cycle the Inverter power supply. • Replace the Inverter. CPF02, CPF03, CPF04 Fault • Baseblock circuit error • EEPROM error • CPU Internal A/D Converter Fault • Perform an initialization to factory defaults. • Cycle the Inverter power supply. • Replace the Inverter.
Forward/Reverse Run Commands Input Together Both the forward and the reverse run commands are input simultaneously for 500ms or more. This alarm stops the motor. Check external sequence logic, so that only one input is activated at a time. External fault input from Communications Option Card • Check for an external fault condition. • Verify the parameters. • Verify communication signals External fault at terminal Sx (x stands for terminals S3 to S7) Eliminate the cause of the external fault condi- tion. Detected after a fault when a RESET command is input while the RUN command is still active Remove the RUN signal first and reset the error.
Ground Fault The ground current at the Inverter output exceeded 50% of the Inverter rated output cur- rent and L8-09=1 (Enabled). • Remove the motor and run the Inverter with- out the motor. • Check the motor for a phase to ground short. • Check the output current with a clampmeter to verify the DCCT reading. • Check the control sequence for wrong motor contactor signals. Loss of Load Loss of motor load according to the settings of L6-01 to L6-03 has been detected. • Make sure that the settings in L6-02 and L6- 03 are appropriate. • Check the mechanical system (mechanical connection of the load, e.g. belt).
Over Current The Inverter’s output current exceeded the over- current detection level. • Remove the motor and run the Inverter with- out the motor. • Check the motor for a phase-to-phase short. • Verify the accel/decel times (C1-). • Check the Inverter for a phase-to-phase short at the output. Heatsink Overheat L8-03 = 0,1 or 2 and the temperature of the Inverter's cooling fin exceeded the L8-02 value. • Check for dirt build-up on the fans or heat- sink. • Reduce the ambient temperature around the drive. • Replace the cooling fan(s). Inverter's Cooling Fan Stopped L8-03 = 3 or 4 and the temperature of the Inverter's cooling fin exceeded the L8-02 value.