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One is dirty and probably setting them off. Each one is going to have a sensor wired in series with all of the others. To find the faulty one, you can un hook the red and brown, then connect them together. This completes the circuit to the end. Then power on, if it does not alarm, you have the faulted alarm. Clean it well and re try them.
Your model has a yellow wire
Are you getting 4 short alarms, then pause?
This is CO alert (carbon monoxide)
Yes, my model has a yellow signal wire and the black & white ac. I am not getting 4 short alarms. Steady beeps, each about 1 second on / 1 sec off
Ok, so you need to vacuum the alarms off and clear the small slotted vents first thing
I have a separate co2 alarm with a read out & peak memory. It says "0" trace of cp2
Do you see the instructions above I uploaded?
Have you put in new batteries?
December 2010. Most read 9.6V. One reads 9v
You may want to unplug each three wire connector then reseat them
If one of the yellow wires is loose or pushed back, it will loose connection with the others and sound the alarm
Clean them first.
Sounds reasonable - thanks for your help!