Flashing red twice

[Katy]

I had Ei140RC series fitted February 2018. All new units. All new batteries.  

On one unit, the red light currently flashes twice every 40 seconds, instead of once every 40 seconds. This particular alarm was also beeping three times (not chirping) intermittently over night, at about 3am. I  vacuumed around the alarm using the soft brush attachment of the vacuum cleaner; it didn’t beep again, but still it flashes red twice, instead of just once. 

Green light is solid and there's been no recent power cuts. Can anyone help please; dreading being woken again tonight! 

[Harry]

Hi Katy

If the alarm has been activated in the last 24 hours, the internal memory is set and the alarm will flash red twice every 40 seconds. After 24 hours this should revert to once every 40 seconds.

Harry

[Guest Lin]

My alarm is also flashing red twice every 40 seconds, it went off for no reason last night several times, I’ve changed batteries in all alarms, I get that it’ll reset in 24 hours but I’m sitting here just waiting on it going off again, I pressed the test button after changing batteries, all the other alarms are fine sorry if that’s a bit of a ramble, I’m just tired!