Я так понимаю, температуры схемы/корпуса.
И это не новая фича. Когда в январе заказывал, оно уже было.
Вот описание с сайта:
"Thermal Monitoring
Shuts the device off if it detects a high temperature condition.
Once the device cools off, it will resume normal operation.
If this error occurs the ProVari will alert you by displaying E3 on the digital display.
Fix: Let the device cool off for several minutes before using again.
(This is a very rare event and something you will most likely never see.)"






