Say to customer"First — please quickly check there's no actual fire or smoke in your home. If everything's clear and it's a nuisance alarm from steam, dust, or cooking, press the Test/Hush button once to silence it for up to 10 minutes. Then use a soft brush or vacuum to gently clean the vent slots around the outside of that unit."

Say to customer"Let's confirm the whole system is still linked. Press and hold the button on any one alarm for about 1 second, then release. After a short delay, every other paired alarm should flash green and beep 6 times. Did all the others respond?"

Say to customer"That's fine — none of the alarms are in active alarm mode right now, which is perfectly normal. To help you further, could you tell me: are any of the alarms showing any kind of light, or making an occasional beeping or chirping sound? Even if it only happens every minute or so?"

Say to customer"Is any alarm showing a slow red flash — one blink roughly every 20 seconds? That would be the alarm memory indicator, letting you know it was triggered recently."

Say to customer"That slow red flash every 20 seconds is just a memory reminder — it means the alarm was triggered recently but it's fully back to normal now. There is nothing wrong with the unit. To clear that light, just press the button on that alarm once. I'd also suggest cleaning the vent slots with a soft brush to reduce the chance of nuisance triggers in future."

Say to customer"That yellow light flashing once with a single beep every 54 seconds means the internal battery is running low. The battery in this unit is sealed and can't be replaced on its own — we'll need to arrange a full replacement unit for you. In the meantime, press the button once to silence the chirping for up to 12 hours."

Say to customer"That double yellow flash and double beep every 54 seconds means the sensor has detected a fault — this is often just dust or debris inside the unit. Please clean all the vent slots with a soft brush or vacuum. You can also press the button once to silence the beeping for 12 hours. If the double yellow flash is still showing after about an hour, please call us back."

Say to customer"That pattern — yellow flashing 3 times every 54 seconds with 3 beeps — means this alarm has reached its end of service life after 10 years. This one needs to be replaced. You can press the button once to silence it for up to 24 hours, but we do need to arrange a replacement as soon as possible."

Say to customer"Is this unit hardwired to mains power, or is it a battery-only model?"

Say to customer"On the front face of the alarm, do you see a solid, constant green light? Or is the green light off?"

Say to customer"The alarm isn't receiving mains power. Please check your circuit breaker or fuse box and see if the circuit for the smoke alarms has tripped. Reset it by flipping it fully off then back on, and let me know if the green light comes back on."

Say to customer"Please tap the test button once quickly. You should see a single green flash — that confirms the battery has power. Did you see a green flash?"

Say to customer"Great. Now let's confirm all the alarms are talking to each other. Press and hold the button on any one alarm for about 1 second, then release. After a short delay, every other paired alarm should flash green and beep 6 times. Did all the other alarms respond?"