What does the digital screen on the FA3322 show?

The FA3322 LCD cycles between two standby displays:

1. Room temperature and humidity levels are shown in degrees centigrade – making this alarm perfect for bedrooms
2. Current carbon monoxide level in parts per million (ppm)/li>

Press the test button to switch between them. During this time the display also shows the peak CO level recorded over the last 4 weeks. The backlight changes colour based on alarm status, providing clear visual guidance. Under normal conditions with no CO detected, the CO reading shows zero.