The manual states that if you do not press "Write" before exiting, all changes are lost. Copying the "Write Config" flowchart from the PDF is recommended.
The Minerva T2000 is not a standard "off-the-shelf" smoke alarm. It is a high-specification, intelligent analogue addressable system. Attempting to operate or repair it without the manual can lead to system faults, unwanted false alarms (which can cost businesses thousands in downtime), or even catastrophic system failure. Tyco Minerva T2000 Manual Pdf
"Get to the street, Elias! Now!"
Restores the system to its normal state after an alarm or event is cleared. The manual states that if you do not