A handy troubleshooting chart from the User Guide.

Troubleshooting - Smoke + CO Alarm with smart features

Indicator Led Colors - what do they mean?

Camera Hardware

How do I factory reset the Smoke + Carbon Monoxide Alarm with smart features?

Quick Tips - Smoke + CO Alarm with smart features

Why am I not able to reset the device?

Troubleshooting - Smoke + CO Alarm with smart features

What does the red blinking light on the detector mean once I insert batteries?

Getting Started - Water Leak + Freeze Detector

What do the various messages mean once the device registration is complete?

Troubleshooting - Smoke + CO Alarm with smart features