SCUBA NooB
Member
Hi, have an issue with a Powerflex 70 that has been installed with braking resistors. The resistors are sitting at 200 degrees Celsius. The motor being driven by this inverter is a vibrating conveyor that runs continuously 24 hours a day without stopping. Have checked parameters 161, 163, 145 and 155 and they appear to be correct. There is a identical machine whose resistors are 30 degrees Celsius. Have compared the important settings and they appear the same. The problem inverter shows a constant fluctuation of drive current between 10-16A over a second or two. The healthy inverter shows 10-11A. Online the diagnostic menu shows Input Phase loss at a value of 32000 and flashes yellow. The healthy inverter has a value of 2000 at this parameter. Have checked input voltage and all stable on three phases. Output current when measured near the motor (clip on ammeter) shows no fluctuation and is steady on all three phases.
Is it possible it could be the motor/physical mechanics causing this to happen? Both inverter and resistors were replaced a couple of months back and looks like the heat has been there a while as the panel wiring has become brittle. Resistors are identical in both machines.
Is it possible it could be the motor/physical mechanics causing this to happen? Both inverter and resistors were replaced a couple of months back and looks like the heat has been there a while as the panel wiring has become brittle. Resistors are identical in both machines.