Exactly same issue with my Sigelei Zmax V3. I am also getting "SHORT" everytime i fire, with or without any cartos/
tanks/clearos reagrdless of 501 or ego. Tried 8-10 diffr cleros/cartos which seem to work on my Vamo. Tried different batteries as well and what not.
Sometimes it used to show low laod/short and usually replacing the clearo head etc or loosening the clearo on Zmax would fix it as that was prolly coil short. W/o any clearo it used to show 9.9 ohms.
Now looks like something on the Mod itself got short as it keeps showing "short' even without anything attached..