648PRO Displays Error Code 91


  • Non-standard or extended error code
  • Represents issues with the lights


  • Error code 91 indicated on model 648PRO, Pro Series
  • Error 91 showing on the control, display panel of 648PRO
  • EC 91

Steps to Verify Issue:


Error code 91 on a Pro Series 648PRO indicates a problem with the lighting system.

No troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.

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