What does the 'No AC' indicator mean on the keypad display?
The 'No AC' indicator appears on the Fixed-Word Display keypad when AC power has been cut off, meaning the system is operating on backup battery power. If this indicator appears, you should investigate the cause of the power loss and restore AC power as soon as possible. (Page 10)
Have a follow-up question?
AI-powered answers from the official manual. Verify critical info.
Common questions