A/C Question, took the plug out to clean the filter, re-inserted the plug, now it won’t power on.

It’s a Mitsubishi MSZ-220 if that helps, I can’t find a single thing online about why it may not power on after unplugging. I tried to reset the Remote, but it mentions to “Select Corresponding Code” with the temp control. I can’t figure out what a “Corresponding Code” is either. If the breaker wasn’t tripped, what issue could it be?