Johnson Controls VSD Series II Micro Drive Issue

[The Reaper]

I replaced some 230v 3ph 7.5 hp VFD's on some AAON RTU's today. Everything went well and the RTU's are running fine but when I kill the disconnect and restore power, the VFD doesn't start even though my run contact on the drive is made. If I disconnect the wire and reconnect it, the VFD ramps normally. Any ideas? TIA.

[Bill Martin]

I replaced some 230v 3ph 7.5 hp VFD's on some AAON RTU's today. Everything went well and the RTU's are running fine but when I kill the disconnect and restore power, the VFD doesn't start even though my run contact on the drive is made. If I disconnect the wire and reconnect it, the VFD ramps normally. Any ideas? TIA.

Check your automatic reset parameters. P2.8.2.1 to 13 1-5 set up the AR function and 6-10 let you deside which faults you want to allow to reset automatically. On my drives I usually enable AR for all faults because there isn't much downside on our equipment.

[The Reaper]

Thanks Bill. I'll give that a try.