No ones going to understand blink codes here ..as they don't use it , i have searched here via google, the 22 code..and ..there were no results, only someone mis-understanding the blink code..and it was another code.
for best results they recommend Forscan ...which you download to a laptop
Which you can get for
FREE ..you buy the interface cable
Get it from here
https://forscan.org/home.htmlYou join the forscan forum .....and all questions on using it be answered there.
So your problem is damp conditions
Suggest take all the multiplugs apart and clean them with electrical contact cleaner.
with forscan you'll know which multiplugs to tackle.
all the best.mark