Forming capacitor 890

Hello Ulf.  While we do not currently have a formal document procedure for forming the capacitors on those products, I can make some recommendations.  For the 690 and 890SD, place the unit on a bench and connect the L1 and L2 terminals to single-phase 230 VAC (three-phase works fine also -- either, really).  Let it sit for about thirty minutes to an hour with no motor hooked up.  Then, power it down, wait until the drive is safe to handle (consult documented discharge times) and install into the machine.

For 890CD drives, you can hook drive drive up to an 890CS module running on 230 VAC.

Notes:

• If the drive has been sitting for about a year, this is a good procedure.  If the drive has been sitting for five years or more like you mentioned, you may want to go in smaller steps.  For instance, start with 120 VAC and work your way up.
• On a machine you are not currently using, it is a good idea to power up every 6 months or so and just let it sit for an hour to keep the capacitors in good condition.

I hope this helps and please let us know if you have questions.