Is there anything I can check for a PRE SEQ READY alarm?

A 590+ with v8 firmware may throw a "PRE SEQ READY" alarm on the keypad when attempting to enable the drive. The manual recommends to simply replace the power board or chassis.

To attempt to determine a root cause check the following points. If all of the below are functioning as intended, the power board or chassis must be replaced as stated in the help file.

1. Missing AC Mains
   1. Check to make sure you are supplying power to each of the three input phases. The 590+ drive will not run properly on single phase supply. Make sure this voltage is nominal to what the drive expects (above the minimum requirement).
2. Check the coding fuses
   1. The exact location of these fuses are dependent upon the frame size of your drive. They include, but may not be limited to:  FS1,FS2,FS3 and FS5,FS6
   2. Consult the 590+ manual for fuse locations from AC mains into the drive.
3. The "PLL STATE" on the "Phase Locked Loop Function" block must be LOCKED
   1. It may cycle through other states when transitioning to LOCKED. But it should be static at LOCKED when attempting to enable.
   2. Right click the function block to observe the help file for a breakdown of additional states.
4. The AC contactor should be closed.
   1. See "CONTACTOR CLOSED" on the "Sequencing" function block. This should be TRUE when you enable the drive.

10OCT19 CW JD