LED states¶

Most rusEFI units have four status LEDs

Communication blue
Fatal/Critical error red
orange misc
green misc

Some simpler units have only communication blue and Fatal red

Bootloader¶

During bootloader operation all four LEDs are expected to blink

Normal operation¶

During normal operation blue LED is supposed to always blink. Blue LED blinking frequency changes when USB connection is detected. Lack of any blinking means brand new from factory unit or completely unexpected firmware condition

Fatal error¶

Solid red means critical error, power cycle is required