ABB inverter schematic?

[Dave H.]

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.

 

[Jumpster Jiver]

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.

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.