Change pressure setting on Goodknight 418

[MSA]

Hello, I'm looking to change the pressure setting on my GoodKnight 418. This is my spare unit which is approximately 14 years old and I need to bump up the setting.

I did email and receive the manual from the board. Unfortunately the only manuals for the 418 where for the 418A and 418P. My model is just the plain 418.

I did find the secret button, however, I can't figure out the necessary steps to change the setting.

Any help would be appreciated.

Thanks
Mike

[trish6hundred]

Hi MSA,
WELCOME! to the forum.!
Hang in there for suggestions, someone will be along to help, soon.
Best of luck to you.