ACS 880 Fault 3280 Resolution
Our fan 400 kW motor is being driven by ACS 880 VFD and operating since 2016. Now we face a problem with fault code 3280. We check what the manual stated, loose connection, voltage fluctuation, etc and found out all are normal. We decided to replace the whole power module including control board and memory card assuming that problems maybe electronics. After replacement we operate for more than 10 days. We concluded that it is the module, but today we experience the fault again. From your expert opinion, what could be the causes and how to resolve?
Given that a remote diagnosis is always very difficult and prone to errors, due to the incomplete knowledge of all the surrounding issues, I ask you if you have also conducted an analysis on the electrical supply network, on which the event you reported.
If even having replaced some components such as the power module and the control board, I suggest you check with an external recording, what are the power supply voltage values, the DC value on the intermediate bus when the fault occurs and the load conditions.
In addition to this, a good suggestion is to consult ABB's local service for more support.