The smoke alarm stays silent when you press its test button, or its status light isn't blinking on its usual 40-second cycle

Possible cause: Obvious damage, wrong or disconnected battery, or a dirty/blocked sensor.. Look the unit over for visible damage, confirm the right battery type is fitted with the cover off and the connection secure, and give it a gentle vacuum using a soft-brush attachment. Fit a new battery. If that doesn't fix it, don't try repairing the unit yourself — the smoke alarm needs replacing.

CO alarm emits an audible 'chirp' once a minute

Possible cause: A fault with the battery, sensor, or circuitry, including a low battery.. Fit a fresh battery straight away for everyone's safety. If it keeps chirping even with new batteries and it's still under warranty, contact technical support for advice; once out of warranty, swap the detector for a new one.

CO alarm sounds (loud audible signal, alarm LED flashing red once a second)

Possible cause: Carbon monoxide detected in the caravan.. Stay calm and open every door and window for ventilation. Turn off and stop using any appliance that burns fuel. Get everyone out, leaving the caravan's doors and windows open, and don't go back in until the alarm stops. Anyone showing signs of CO poisoning needs medical attention. Keep the caravan out of use until your supplying retailer has fully serviced every appliance - a GAS SAFE registered installer must be the one to test the gas appliances.

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Bailey • Smoke & CO Alarms

Covers: Alicanto Grande I, Pegasus Grande I, Unicorn Black Edition

+3 more

Unicorn IV, Phoenix Plus, Discovery I

Alicanto Grande I models: Estoril, Sintra, Porto

Pegasus Grande I models: Messina, Bologna, Rimini, Brindisi, Palermo

Unicorn Black Edition models: Seville, Vigo, Valencia, Cadiz, Madrid, Cabrera, Cartagena, Pamplona, Barcelona, Segovia, Merida

Unicorn IV models: Seville, Vigo, Valencia, Cadiz, Madrid, Cabrera, Cartagena, Pamplona, Barcelona, Segovia, Merida

Phoenix Plus models: 420, 440, 640, 642, 644, 650, 760

Discovery I models: D4-2, D4-3, D4-4

Bailey Smoke & CO Alarms

(2019 Model Year)

View official manual on manufacturer's site ↗

Also Fitted To This Caravan

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	The smoke alarm stays silent when you press its test button, or its status light isn't blinking on its usual 40-second cycle	Obvious damage, wrong or disconnected battery, or a dirty/blocked sensor.	Look the unit over for visible damage, confirm the right battery type is fitted with the cover off and the connection secure, and give it a gentle vacuum using a soft-brush attachment. Fit a new battery. If that doesn't fix it, don't try repairing the unit yourself — the smoke alarm needs replacing.	DIY Safe
Recommended partAffiliate linksView partHide This handbook specifies a 9V battery for the smoke alarm. 9V batteryDuracell Plus 9V Alkaline Batteries (2 Pack) 6LR61~£6.50 for 24.7★ (15,000+ ratings), dispatched/sold by Amazon View on Amazon →
`N/A`	CO alarm emits an audible 'chirp' once a minute	A fault with the battery, sensor, or circuitry, including a low battery.	Fit a fresh battery straight away for everyone's safety. If it keeps chirping even with new batteries and it's still under warranty, contact technical support for advice; once out of warranty, swap the detector for a new one.	DIY Check / Tech Fallback
Recommended partsAffiliate linksView 4 optionsHide Does the CO alarm itself need replacing? It may be a sealed unit with a built-in battery. FireAngel lists both of these alarms as suitable for caravans and motorhomes: The handbook doesn't name the battery type, so check your own alarm (and the expiry date on its back) before choosing. Sealed unit (10-year battery)FireAngel FA3322 Digital Carbon Monoxide Alarm~£37.994.6★ (700+ ratings), sold by FireAngel, dispatched by Amazon - battery sealed in for the alarm's life View on Amazon → Replaceable batteries (2x AA)FireAngel FA3313 Carbon Monoxide Alarm~£18.984.7★ (970+ ratings), dispatched/sold by Amazon - supplied with 2x AA batteries View on Amazon → Are the batteries replaceable in your CO alarm? Check which type it takes (look at the batteries fitted now), then choose the matching pack: 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 →
`N/A`	CO alarm sounds (loud audible signal, alarm LED flashing red once a second)	Carbon monoxide detected in the caravan.	Stay calm and open every door and window for ventilation. Turn off and stop using any appliance that burns fuel. Get everyone out, leaving the caravan's doors and windows open, and don't go back in until the alarm stops. Anyone showing signs of CO poisoning needs medical attention. Keep the caravan out of use until your supplying retailer has fully serviced every appliance - a GAS SAFE registered installer must be the one to test the gas appliances.	Professional Intervention Required