A customer once used our ATV16. He used ATV28 to replace ATV16 because ATV16 was damaged. But he found the motor temperature was much higher than before. He had adjust the switch frequency but not useful. We have no material about ATV16. Can you give them an explanation?
How the temperature was measured ?
The command low is not the same between the ATV16 and ATV28, it could be the origin of this difference.
Normally, the inverter provide the current asked from the motor not the reverse, but you can verify some parameters like the nominal voltage setting in the inverter.