Question 1

The carbon monoxide detector emits a single chirp once a minute and its Fault LED flashes yellow once a minute, and can keep this up for up to 30 days

Accepted Answer

Possible cause: The detector's continuous self-check has found the sensor/circuitry settings to be incorrect, or the power pack has become low. If the detector is still within its warranty period, contact technical support. If it's out of warranty, replace it immediately - its power pack is sealed in for the product's life and can't be replaced on its own, and the sensor itself should be replaced after 7 years from installation regardless.

Question 2

CO alarm chirps once a minute and the Fault LED flashes once a minute

Accepted Answer

Possible cause: The detector's own self-check has found an issue with its sensor/circuitry, or its power pack is running low - this can carry on for up to 30 days.. Because this detector's power pack isn't user-replaceable and is rated for the product's whole lifetime, a fault signal like this usually means the unit itself needs replacing - contact your dealer for a new detector.

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	The carbon monoxide detector emits a single chirp once a minute and its Fault LED flashes yellow once a minute, and can keep this up for up to 30 days	The detector's continuous self-check has found the sensor/circuitry settings to be incorrect, or the power pack has become low	If the detector is still within its warranty period, contact technical support. If it's out of warranty, replace it immediately - its power pack is sealed in for the product's life and can't be replaced on its own, and the sensor itself should be replaced after 7 years from installation regardless.	DIY Check / Tech Fallback
`N/A`	CO alarm chirps once a minute and the Fault LED flashes once a minute	The detector's own self-check has found an issue with its sensor/circuitry, or its power pack is running low - this can carry on for up to 30 days.	Because this detector's power pack isn't user-replaceable and is rated for the product's whole lifetime, a fault signal like this usually means the unit itself needs replacing - contact your dealer for a new detector.	Professional Intervention Required

Coachman Smoke & CO Alarms

Master Troubleshooting & Diagnostics Matrix