The smoke alarm gives a brief beep every minute.

Possible cause: The battery is worn out and needs replacing, which is what's triggering the low-voltage warning.. Fit a new battery straight away. The alert will keep sounding for about seven days, and the battery should be swapped out at least once every twelve months regardless.

The carbon monoxide detector gives one audible chirp every minute, and can continue doing so for up to 30 days.

Possible cause: Incorrect settings found in sensor/circuitry or low batteries. Replace the batteries (change at least every twelve months). Note that this chirp does not mean carbon monoxide has been detected.

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Auto-Trail • Imala • Smoke & CO Alarms

Auto-Trail Smoke & CO Alarms

(Imala, 2026 Model Year)

View official manual on manufacturer's site ↗

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	The smoke alarm gives a brief beep every minute.	The battery is worn out and needs replacing, which is what's triggering the low-voltage warning.	Fit a new battery straight away. The alert will keep sounding for about seven days, and the battery should be swapped out at least once every twelve months regardless.	DIY Safe
`N/A`	The carbon monoxide detector gives one audible chirp every minute, and can continue doing so for up to 30 days.	Incorrect settings found in sensor/circuitry or low batteries	Replace the batteries (change at least every twelve months). Note that this chirp does not mean carbon monoxide has been detected.	DIY Safe
Recommended partsAffiliate linksView 2 optionsHide Check which battery type your CO alarm takes (look at the batteries fitted now), then choose the matching pack: The handbook doesn't say which battery this alarm uses. Most caravan CO alarms take AA or 9V batteries, so check yours before ordering. AA batteriesDuracell Plus AA Alkaline Batteries (12 Pack) 1.5V, LR06~£9.00 for 124.7★ (71,000+ ratings), dispatched/sold by Amazon View on Amazon → 9V batteryDuracell Plus 9V Alkaline Batteries (2 Pack) 6LR61~£6.50 for 24.7★ (15,000+ ratings), dispatched/sold by Amazon View on Amazon →