The user manual is on Provapes website but this is the list of error codes & what they stand for straight from the site...
• E4 – Input Voltage to DC/DC converter error - Contact ProVape.
• E5 – Converter has a problem - Contact ProVape.
• E6 - Microprocessor has a problem – Contact ProVape.
Error Codes
Errors – There are a number of safety monitors built into the ProVari and its always checking for problems. If a problem is detected the display will show a two digit error
code for 4 seconds alerting you of a problem. The following are the error codes:
• E1 – Short Circuit / Shorted Atomizer – If this error appears, remove the atomizer and replace with a different one
or lower your voltage settings. The ProVari will automatically reset when the problem is fixed.
• E2 – Current Limit Exceeded – If this error appears, lower the voltage on the
device or use a higher resistance
atomizer. Once the problem has been fixed, the ProVari will reset itself.
• E3 – Thermal Monitor – If this error appears, let the
device cool off for several minutes before using again.
• E7 – Voltage output detected when there should be none – This can be caused by a converter fault or by an open atomizer. Only contact ProVape if you know the atomizer is good and the problem persists.
• E8 – Converter has detected a fault – Contact ProVape is this persists.
Have you tried another clearo or carto?