Internal overcurrent or overvoltage

Inverters have built-in protection functions, including DC overvoltage and overcurrent protection, that flag abnormal internal electrical conditions. One typical alarm is a DC bus overvoltage (OV-BUS), raised when the inverter detects too much voltage on its internal DC bus. The listed causes are internal damage to the inverter or a wire that came loose during shipping. Check first by measuring the DC and AC voltages yourself and comparing them with the values on the inverter display. If the measured voltages are normal but the alarm stays, treat it as internal damage: the inverter should be replaced. Revenue meters can also report a severe out-of-tolerance internal operating condition as a status failure, and then go into a disabled state.

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• sentence 5: support check: partial - Replace Inverter and internal damage are listed, but the passage does not state the conditional logic that normal measured voltages with persistent alarm means internal damage. -->