HI, Larry!
91,720 means that the Motor did not stall while moving from Print to Park.
What engineers usually do first is :
• Reboot the printer and verify the error persists.
• Check that the Process Drive gear train is properly homed.
• Check for obstructions or ink spills around the Printhead.
If you're not sure about this, I do suggest getting an engineer on site.
Best Regards
Kimzi
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My printer shows an error code of 91.720.00:41956 What does this mean and how do I correct it?