Today we're having air conditioners installed in 6 different rooms... Printed out a version of the blueprint where I put in which minisplit unit goes in which room so it's easy to understand for the installers
Picked up this book: "Sayonara bombs!" a troubleshooting guide to System 7. Along with generic system maintenance tips and explanations of a whole range of errors, it also dives into decoding sad mac codes and system error codes.
A book page with a list of error codes
A book page showing sad mac error codes
A red book with an illustration of a bomb on it and the text 爆弾ょ
サヨウナラ！