How do I fix the beeping sounds and display "HI" in the air conditioner?

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: reset air conditioner

Unplug it. Wait a few minutes. Hold in the Power button while plugging it back in and keep the button held down until a beep is heard (~5 sec). Unplug the air conditioner, then plug it in again.
Note: some units require using the Mode switch, rather than Power.

SOURCE: Shutting off

I would try the same solution as the E1 error code, Not sure if it will work, but it seems to be the same issue


1. Power down the air conditioner using the "power" button on the front
panel.
2. Unplug the air conditioner from the wall socket.
3. Hold the front panel "power" button down and plug the air
conditioner in. Continue to hold the power button down as the machine
goes through a brief test sequence (fan & compressor each come on
briefly, etc). There is a "beep" sound at the end of the test sequence,
and the machine will be off. At this point, you can release the power
button.
4. Unplug the air conditioner.
5. Plug the air conditioner back in.
6. Congratulations! You should now be able to operate the air
conditioner normally for another 720 hours, but only if you followed
the instructions above EXACTLY.

SOURCE: Air conditioner will only run a short time then shut off.

Manula or online site will tell you what e-1 is, I would think it is a power outtage reading and unit needs to be reset. Dont be afraid to call your units manufacturer and ask tech how to reset unit with an E1 error.

SOURCE: I have a Sharp Comfort Touch AC displaying E-1. ??

This is a reminder to clean the air filter. It happens every 720 hours of operation. Here are the steps to get it back up and running:
1. Power down the air conditioner using the "power" button on the front panel.
2. Unplug the air conditioner from the wall socket.
3. Hold the front panel "power" button down and plug the air conditioner in. Continue to hold the power button down as the machine goes through a brief test sequence (fan & compressor each come on briefly, etc). There is a "beep" sound at the end of the test sequence, and the machine will be off. At this point, you can release the power button.
4. Unplug the air conditioner.
5. Plug the air conditioner back in.
6. Congratulations! You should now be able to operate the air conditioner normally for another 720 hours, but only if you followed the instructions above EXACTLY.