20 Most Recent Hitachi RAS-09UH Air Conditioner - Page 2 Questions & Answers

If the power "flickers" and unit fails but will restart once the breaker is reset, this sounds absolutley normal. It is a safety device that keeps the unit from burning up things due to improper power being supplied. As long as resetting puts it back into service with no issues, don't worry about it.

push on off button on your unit

maybe the red light indicates on power supply

Set the clock time on the remote control to start operating.

If you can access the pcb inside, check the mini glass fuse