Press anf hold the TEST key, the product enters the test state. When the red light flashes, the buzzer sounds, and the action mode is the same as the alarm mode, it mean normal working; When it will flash eight times in red, without buzzing Tweeter, it means it abnormal working.
Alarm
The Red LED will flash very quickly and "DI DI DI" alarm sound will be issued by the buzzer.
Mute Button
When Alarming, Press the button to turn off the buzzer and the Red LED flashes every 9 senconds.The mute time is about 9 minities and it will trun back to normal standby state.