hello I have a problem with micromaster 420 it signals me error AO 503 I state that there are 4 inverters installed in the same electrical panel and when idle the rooo26 parameter gives the same value for all running inverters the value drops only for inverters that give an anomaly how can I solve the problem thanks

Emmanuele pescialli

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Split from micromaster 430.

Can you provide some detail about the application, are all motors doing the same task?

A0503, ‘under Voltage’, so this is probably related to the inverter not the supply system?

Can you see the physical condition of the DC Link capacitors, without stripping the inverter drive down, distorted cans?

This may be due to DC Link capacitors deteriorating, and failing to support the DC Link when under load?

Tractor