ABB’s ACS800 Variable Frequency Drive is powerful AC drive that can handle applications from 0.75 to 7500 horsepower with ease. Advanced harmonics mitigation technology provides a cost efficient solution to meet your most stringent power quality standards.
The ACS800’s highly flexible, highly programmable platform makes integrating the drive into just about every drive-motor application you can think of a breeze. The drive’s “Everything Inside” design makes it fantastic “plug-and-play” tool, but the drive really shines when it is tailor made for your most precise applications. The drive is suitable for use in process industries such as pulp and paper, metals, mining, cement, power, chemical, and oil and gas. The ACS800 can even be found powering offshore supply vessels in the Gulf of Mexico!
Because the ACS800 is such a valuable tool, it can be a headache when something goes wrong. With dozens of fault codes to parse and diagnose, it may be difficult to identify where your drive is encountering issues. To help you diagnose issues you’re having with the ACS800, we’ve composed this guide to give you a head start when troubleshooting your drive.
This is Part 1 in a five-part series.
DC Overvoltage #3210
If your drive detects DC overvoltage, the display will show “DC OVERVOLTAGE (3210)” on the control panel, 3rd line down.
This indicates excessive intermediate circuit DC voltage. For 400 V units, U1max is 415 V. For 500 V units, U1max is 500 V. Actual voltage in the intermediate circuit as it corresponds to the main voltage trip level is 728 VDC for 400 V units and 877 VDC for 500 V units.
- Check that overvoltage controller is on
- Check main power lines for static or transient overvoltage
- Check brake chopper and resistor (if used)
- Check deceleration time
- Use the Coast-to-Stop function if your application will tolerate it
- Retrofit the frequency converter with brake chopper and brake resistor
An external brake chopper can be connected to terminals UDC- and UDC+. It may need its own control power. It should have its own brake resistor built-in, or at least supplied with the brake chopper assembly. Only use the Coast-to-Stop function if your application will tolerate motor coasting to stop and if fast stops are not necessary.
Supply Phase #3130
In the event of a supply phase fault, the drive’s display will show “SUPPLY PHASE (3130)” on the control panel, 3rd line down.
This fault is indicating the Intermediate DC BUS circuit voltage is oscillating. This may be caused by a missing main phase, blown fuse, or rectifier bridge internal fault.
- Check main line power fuses
- While the drive is running, check for phase balance with a clamp meter
- While the drive is powered down (wait five minutes or so for the power bleed cycle to complete), check the input power rectifier bridge
Basically, the drive is single phasing and needs all three phases feeding the drive consistently to keep DC BUS ripple to a minimum. If the incoming power is fine, then the drive most likely has an open rectifier in the input bridge. If the rectifier was shorted, it would cause line power failure, blowing fuses or tripping breakers.
Stay tuned for Part 2! If you have any questions about the ACS800 or drive fault codes, contact our experts today!