Common faults in the instructions of Yaskawa G7 inverter
Overcurrent (OCOvercurrent)
Note: The output current of the inverter exceeds the overcurrent detection value.
Common Causes:
Short circuit or grounding occurs on the output side of the converter (motor burnout, poor insulation, contact due to cable damage, grounding, etc.).
The load is too large, and the acceleration time is too short; (Usually appears in the report during the debugging acceleration process, adjusting the acceleration time, and checking L2-03)
The solenoid switch on the output side of the converter has started working.
Short-term stall rotation of the motor, such as slow action of the brake when opening the brake (it may be that there is a problem with the brake, or there is a problem with the debugging program, or the brake pad is rubbed, or there is no zero-speed brake when the brake is opened, and the absence of zero-speed brake is usually a parameter, or there is a problem with the program)
GFGrounFavlt)
Note: The grounding current at the output end of the inverter exceeds 50% of the rated output current of the inverter.
Common Causes:
The output side of the converter is to the ground (contact and grounding caused by motor burnout, poor insulation, cable damage, etc.) with a shake meter to check whether the motor inlet wire is grounded and whether the motor wiring is wet in the converter box;
If the motor is not grounded, it may be caused by a faulty detection ring, please replace the drive plate.
The solenoid switch on the output side of the converter has started working.
The motor is stalled for a short time, such as slow braking action when opening the brake (it may be that there is a problem with the brake, or there is a problem with the debugging program, or there is a brake friction, or there is no zero-speed brake when the brake is opened, usually there is no zero-speed brake when the parameter or stroke is opened).
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Fuse (DCBusFuseOpen)
Note: The fuse installed in the main circuit is damaged due to a short circuit at the output end of the inverter. Common causes: Fuse burn, which may be due to the short circuit of the DC bus, resulting in fuse burn, and there are several reasons for the short circuit of IGBT:
quality problems, aging of components, etc.;
Due to the humid environment, the temperature is too high, the dust is more, the vibration, the external environment changes drastically, such as the air conditioner against the wind after the power failure, it is easy to report the loss of operation after power, and if the environment where the inverter is located vibrates greatly, it is easy to cause damage to the IGBT.
Whether there is a motor that stalls when starting and stopping, resulting in a large starting current.
Due to the failure of the drive, the IGBT trigger is poor.
The large amount of Yaskawa inverter G7, coupled with the aging of components in the long-term use process, the poor contact of the installation of peripheral equipment, and the influence of the external environment of the work will cause the inverter to report failure
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