“Fault check aux monitor” Jandy Heater

my heater isn’t working.
JandyPro series. Model #JX1260N. Display says “fault check aux monitor”
Manual says this error means “check VersaFlo”
I found installation manual for “VersaFloTM Integrated Bypass
for JXiTM Pool and Spa Heater“
But can’t find anything to troubleshoot. I am in Cedar Park Texas and the wait time for technician is 6-8 weeks. Thanks for any advice.