My hitachi follow me air conditioner had stop working due to low voltage fluctuation after red light blinking I have a reset button please explain stepwise resetting process if resetting is required

SOURCE: Air condition problem

An E1 error is automatically generated after the AC runs for so many hours to remind you to clean the filter. The manual says to clean filter and unplug unit, then plug unit back in and code will be reset.

SOURCE: air conditioner has to be reset --E1

If your a/c unit is portable,and E1 code most always is "air filter cleaning time" or" water level to high ".
To reset air filter interval turn unit off at power switch then unplug.Hold power switch down while plugging in....unit will go through a short self check then beep.Release power button after beep.Unit should now be reset.
To reset water level....just drain some.....not all.
Most portables use water for increase cooling......so leave some in.

SOURCE: I have HAIER HPAC 99ER Portable air conditioner

Make sure your filter & the coils (area under the filter) are clean or that the evaporated water is not overfilled by draining it manually by pulling the plug on the lower rear of the unit (into a bucket of course.) I'm hoping you had gotten an answer sooner...

SOURCE: My Ruud Air Conditioner Model UAMB-048JAZ is not blowing cool air

3 things it could be:

#1 problem with AC units - dirty coils, this leads to many other problems and is caused by neglecting to change filters monthly. You can buy coil cleaner commercially, but it is not the coils you see that get dirty. There is another set inside that is usually not visible. If you look outside and your unit is "iced up" there is a 98% chance that is your problem. Sometimes it could be iced and you can't see it from the outside. Solution, turn AC off and blow fan to thaw. When thawed, clean coils with coil cleaner and coil comb.

Relay switches, you already pushed it so you may have a bad switch.

These are the two most common problems. A mechanic will be quickl to say it is your compressor for $. There are normally only half a dozen things that go wrong if your AC is 10yrs or less. If it is over that, it could possibly have a more serious problem. (Secret hint - I have known AC's to last 30+ years if the filters are changed regularly. Letting dust and dirt build up on coils invites a host of other problems due to the stress it puts on the other components.

SOURCE: red blinking and ac not working

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.