Error Low battery: Carbon Monoxide Alarm low battery indication (1 beep/min, 1 amber flash/min)

Possible cause: Low battery power. Replace the batteries.

Error Fault: CO alarm shows a general fault (2 rapid beeps and 2 rapid amber flashes per minute)

Possible cause: Device internal fault; may not detect CO. Replace the alarm straight away - if it's still under warranty, get in touch with Technical Support.

Error End of life: CO alarm shows an end-of-life indication (3 rapid beeps and 3 rapid amber flashes per minute)

Possible cause: The unit has reached the end of its working life and may no longer reliably detect CO.. Replace the alarm straight away - if it's still under warranty, get in touch with Technical Support.

The smoke alarm chirps audibly every 40 seconds, signalling a low power pack

Possible cause: The power pack no longer has sufficient capacity for the smoke alarm to operate correctly.. Fit a new smoke alarm straight away. The chirping warning carries on for at least a week, but leave it any longer and the unit may not have enough power left to genuinely warn you if a fire breaks out.

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Elddis • Smoke & CO Alarms

Covers: Autoquest APEX, Avalon, Avalon Evolve

+2 more

Whirlwind GT, Whirlwind GT Evolve

Whirlwind GT models: 105, 115, 120, 150, 155, 185, 194, 196, 196+

Whirlwind GT Evolve models: 105, 115, 120, 150, 155, 185, 194, 196, 196+

Autoquest APEX models: 105, 115, 120, 150, 155, 185, 194, 196+

Avalon models: 250, 255, 285, 295

Avalon Evolve models: 250, 255, 285, 295

Elddis Smoke & CO Alarms

(Motorhome, 2026 Model Year)

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`Low battery`	Carbon Monoxide Alarm low battery indication (1 beep/min, 1 amber flash/min)	Low battery power	Replace the batteries.	DIY Safe
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`Fault`	CO alarm shows a general fault (2 rapid beeps and 2 rapid amber flashes per minute)	Device internal fault; may not detect CO	Replace the alarm straight away - if it's still under warranty, get in touch with Technical Support.	DIY Check / Tech Fallback
`End of life`	CO alarm shows an end-of-life indication (3 rapid beeps and 3 rapid amber flashes per minute)	The unit has reached the end of its working life and may no longer reliably detect CO.	Replace the alarm straight away - if it's still under warranty, get in touch with Technical Support.	DIY Check / Tech Fallback
`N/A`	The smoke alarm chirps audibly every 40 seconds, signalling a low power pack	The power pack no longer has sufficient capacity for the smoke alarm to operate correctly.	Fit a new smoke alarm straight away. The chirping warning carries on for at least a week, but leave it any longer and the unit may not have enough power left to genuinely warn you if a fire breaks out.	DIY Safe

Frequently Asked Questions

Q: How do I test the smoke alarm?

Make sure the alarm is correctly clipped onto its base plate first. Press and release the test button in the middle - you should hear two cycles of three loud beeps that stop on their own, with the red LED flashing quickly throughout.

Q: How do I silence a false smoke alarm using Smart Silence?

Press and release the central test button - the alarm goes quiet and drops into reduced sensitivity for around 10 minutes before automatically returning to full sensitivity.

Q: How do I activate the Carbon Monoxide alarm?

Pull the disabling tab out first, then allow up to 60 seconds for the unit's green LED to begin flashing - that confirms it's now active. From there, press the Test button to check the alarm itself is working properly.