An inverter problem

I'm in UK and have recently converted my lathe to variable speed by changing the motor to 3ph and installing a Mitsubishi FR-E520S-1.5K-EC inverter running from a 1ph 240v supply. The motor is a new Teco 2HP unit, but the inverter was second hand. For the first month or so, everything was fine but, out of the blue (as it were), the inverter has been throwing out E.OV3, and sometimes, E.OV2 errors. The errors are not encountered every time the lathe is used, but often enough to be really worrying. It happens even under no-load, ie. the chuck is turning but there is no metal cutting at all. Originally, the inverter fan would switch on only when the motor was turning, but since the error conditions started, the fan is on whenever the inverter is powered. Any one got any ideas about this please? Could it be a problem with the motor?

Reply to
lemelman
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There's a great manual for this inverter

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chapter 5 has a step by step trouble shooting guide.

Karl

Reply to
Karl Townsend

Its an over voltage condition in the regenerative dc circuit.

Double check that you have the proper value braking resistor installed, that your supply voltage is NOT over 240vts and that you have it properly hooked up for single phase input.

Also check your programmed motor parameters and make sure they match the motor.

Ive not had good luck with Mitsi inverters over the years. Im a machine tool service tech btw. Shrug.

Karl posted a link to the manual.

Gunner, who gets a OV at certain times of the day with several PC3 inverters at home...when the 1ph 220 house supply goes up to 245+ volts..and the power company wont do anything about it.

"Upon Roosevelt's death in 1945, H. L. Mencken predicted in his diary that Roosevelt would be remembered as a great president, "maybe even alongside Washington and Lincoln," opining that Roosevelt "had every quality that morons esteem in their heroes.""

Reply to
Gunner Asch

Thanks for the advice and pointer to the manual. I'll get a braking resister and see what happens.

Reply to
lemelman

You DONT need the factory resistor btw. Just find out what the value is (ohms) and pick up a nice big 200 watt wire wound ceramic from Ebay, the surplus places etc) Might cost you $10 if you shop around. Or double triple em up if you get smaller ones

Gunner

"Upon Roosevelt's death in 1945, H. L. Mencken predicted in his diary that Roosevelt would be remembered as a great president, "maybe even alongside Washington and Lincoln," opining that Roosevelt "had every quality that morons esteem in their heroes.""

Reply to
Gunner Asch

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