Re: Diplomat ADP8322
7 beeps is flowmeter not detected. There are several ways to sort this. (in order of expense……)
1) Remove the left side panel and disconnect the flowmeter plug. Clean the contacts on the little PCB, crimp the plug with pliers gently to tighten it. Refit and test. I’ve done dozens like this and it was just down to poor or oxidised contacts and a loose plug.
2) Remove the little PCB and replace the reed switch with one from Maplins. Solder it on and refit.
3) Buy new airbox with the flowmeter fitted. 😯
Hope that helps,
Steve.