ABB inverter schematic?

Question

Hi, I have an ABB ACS-301-4P9-3 VFD invertor that I would like to get a schematic for - it was dropped (hard!) by the UPS man, and all appears to be working except the programming panel and display - so I can't configure it for the motor I'm using!

Some investigation revealed that there's no DC to the panel, cable and connectors checked and OK, and rather than dive in to the (surface mount) board blind, I could really use a schematic for the main (processor) board, or the whole thing! The man at ABB's agent in t he UK says "It's obsolete, and we wouldn't have repaired it anyway, so no service info - buy a new one!"

Any help would be really appreciated,

Dave H.

Michael A. Terrell · Accepted Answer

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Jumpster Jiver · Answer

Considering how it was damaged, a schematic may not help. Since you seem to know where DC should enter the panel, your best bet may be to carefully follow that circuit back to the power supply with a lighted magnifier and a digital multimeter. Look very carefully for damaged components - the pin broke off the component or came out of the board, hairline cracks in the board, cracked solder connections, etc. In this case it sounds like you should be searching for some tiny, hard to find physical damage, rather than a defective component. If you can safely do so, gently flexing the board with power applied may help you find the damage. Sometimes tapping on the board or components with an insulated item could help too. Good luck. Most often support from manufacturers consists of replacement with a new or refurbed product if it were under warranty, and no support when the warranty expires or is voided.

ABB inverter schematic?

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