The second floor glasswasher which had been an "Error 90 door fault" has been repaired via consult with the manufacturer. I apologize for the length the unit has been out of service, however once the manufacturer was made aware of the cost of a diagnostic visit to troubleshoot, not repair the issue, they became much more receptive to walking me through the potential problems. 

When using any of the glasswashers, please let the machine run entirely through it's cycle. The issue we had here was a contact on the wrong side of the locking mechanism.