西威变频器常见故障及处理（Common faults and processing Xiwei inverter）.doc

西威变频器常见故障及处理（Common faults and processing Xiwei inverter） Siei inverter common fault list (fault code) Failure supply (fault name) power supply voltage fault (fault description) internal power supply problems Voltage faults may cause faults in the inverter (check) check the equipment power supply reset and restart. If any trouble occurs, please contact the SIEI agent (treatment) repair (fault code) Under voltage (fault name) undervoltage (fault description) the minimum threshold of the inverter DC link voltage below the set input voltage (for possible reasons) the DC bus falls below 65% of the rated value. The most common reason is the power failure of the equipment. The internal faults of the frequency converter may also cause undervoltage faults (check) if the temporary power supply voltage is interrupted, restart after reset. Check the device input. If the device power is normal and an internal fault occurs, please contact the SIEI agent (method of measurement) measuring whether the voltage at the ends of the DC is consistent with the monitor/DC linkvoltage. If there is no agreement, the circuit may be detected. This fault can be masked and used (fault code) Over voltage (fault name) overvoltage (fault description) the maximum threshold voltage of the converter DC link is higher than the set input voltage (for possible reasons) the DC link voltage in the converter exceeds 35% of the rated value. The deceleration time is too short and the equipment is subjected to very high overvoltage peaks (check) adjust the deceleration time (treatment) 1, check the brake resistance is off-line, resistance is matched with the recommendation, 2, BU res OL time settings are appropriate (fault code) IGBT Desaturat (fault name) IGBT fault (fault description) gate saturation sensing circuitry detects IGBT transient overcurrent (for possible reasons) the inverter has detected errors, disturbances, faults, and device failures in the IGBT bridge or its gate driver (check) reset and reb