!!
critical Breville
Error Code Machine beeps 20 times in fast succession and '2' is displayed
Critical system error detected in the coffee maker.
? What Causes This
Unknown system malfunction or internal error.
✓ How to Fix It
Call Breville Consumer Service immediately for assistance.
Source: page 33 of the official manual
From the manual
This error code appears in:
Breville Descale Coffee Maker