My Hitachi ac 's white light is blinking and ac not starting

It is the Indoor Printed Circuit Board.

https://www.google.com/search?q=Hitachi+inverter+AC+indoor+light+3+time+blinking+error

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The thermistor on the outside unit has failed. Replace it.

That means that the indoor unit is not communicating with the outdoor unit. Check all the cables between the two units, look for broken wires, corrosion and loose fittings

My Hitachi air-condition timer tight blinking 4 times . What can I do?

White light bleaking

Hi,
I hope this information can help?
https://www.hitachiaircon.com/argws/html/helpingyou/en/AlarmCodes.pdf

Good luck

possibly the filter...

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

The outside unit has a problem. Have it tested.

Did you figure out why the ac wasn't responding to the remote? I am having the same problem. I just cleaned out the filters but it's still not responding to the remote. I have already tried reset button in the remote, which didn't help. I am pretty sure that the remote is not out of battery.

I was told the same thing that Dennis has posted by the guy who came to service the AC. So I think, it is ok as long as it blinks 9 times in a row and then repeats it after a brief pause.