6SE70 series inverters, due to good quality, the failure rate is significantly reduced, we often encounter the phenomenon of failure F008 (DC voltage is low), because it is directly through the resistance to step down to obtain the sampling signal, so the main reason for the failure of F008 Damage to the sampling resistor.
In addition, we will also encounter F025, F026, F027, on the lack of input phase alarm, the cause of the failure is because the 6SE70 series with its own input phase detection function, input detection circuit damage will cause the input phase loss alarm, such as troubleshooting For the reason, the alarm signal cannot be eliminated. It is very likely that the fault is the damage of the CU board.
In addition F011, F029 (overcurrent) fault is also a common fault, the damage of the current sensor is one of the causes of this fault, in addition we often encounter in the maintenance of the drive circuit and switching power supply on some of the filter capacitor The damage will also cause F011 alarm F029 current detection chip circuit, we must pay special attention to the fault alarm caused by this reason.
In addition, we will also encounter F025, F026, F027, on the lack of input phase alarm, the cause of the failure is because the 6SE70 series with its own input phase detection function, input detection circuit damage will cause the input phase loss alarm, such as troubleshooting For the reason, the alarm signal cannot be eliminated. It is very likely that the fault is the damage of the CU board.
In addition F011, F029 (overcurrent) fault is also a common fault, the damage of the current sensor is one of the causes of this fault, in addition we often encounter in the maintenance of the drive circuit and switching power supply on some of the filter capacitor The damage will also cause F011 alarm F029 current detection chip circuit, we must pay special attention to the fault alarm caused by this reason.
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