Ok have a single wired smoke alarm on celing with 9v battery we have changed battery and pushed the test button but it keeps beeping ( live in Sydney)

All smoke detectors have a 9v battery in them. Try swapping the battery to see if it clears the beeping.

BATTERY REPLACEMENT Always turn off power to smoke alarm before replacing battery.
Replace battery at least once a year, or immediately when the low
battery signal sounds (a beep once per minute indicates low bat-
tery). Batteries should be replaced regularly as necessary, even
when the smoke alarm is receiving AC power.
Use only the following batteries as replacements in this smoke alarm: Eveready 216, 522, 1222, Duracell MN 1604, or Ultralife U9VL-J [Alkaline batteries 9Volt] DO NOT USE RECHARGEABLE
BATTERIES.

1. Turn off power to smoke alarm at main service panel.
2. Turn smoke alarm counter-clockwise to detach from mounting plate.
3. Gently pull down smoke alarm. Be careful not to separate wire
connections.
4. Pull out power plug from back of smoke alarm.
5. From back of smoke alarm, lift tab to open battery pocket door.
6. Remove battery from pocket. Disconnect and discard bad battery from battery connector.
7. Connect a fresh, 9-volt battery to connector. The battery will fit
only one way. Be sure battery connector is securely attached to
battery terminals.
8. Place battery into battery pocket.
9. Close battery pocket door. Push down until it snaps into place.
10. Replace connector plug. Connector will "snap" into place.
Gently tug connector to be sure it is attached properly.
11. Reattach smoke alarm to mounting plate by turning smoke
alarm clockwise until it snaps into plate.
12. Turn on power and test smoke alarm using Push-to-Test button

I am assuming that your detectors are interconnected to all sound at the same time.
Pushing the test button is not the same electrically as an alarm activation.
The Kiddie manual does not mention the sequence of operations when the test button is pressed. You may want to contact Kiddie to find out if this is ok.
You can also test your detector with smoke to see if they all sound like they are supposed to.

Hi Robin

Usually push in (up) & turn
Feel it as you turn
.....then remove from other half.
Have 9v battery handy for replacement.

Could be a bad or used battery. ry replacing it with one that you tested to make sure it has 9V. Also make sure the activator arm that's held in place by the battery body is properly seated and not broken off. If all is OK, and still not working replace the unit.

Check that the battery is installed the right way around. Most smoke alarms can only be tested manually (by pushing the button). If you are hearing a single beep every 50 or 60 seconds then this is the low battery indicator and this will sound if the battery is inserted the wrong way around. If the siren is actually sounding continually then your smoke alarm might be clogged with dust or other foreign matter. All smoke alarms should be replaced every 5 to 7 years as the components in them only have a limited life span.

Change the 9V backup battery,with a new one.Push and hold the reset button for a minute or two for the alarm to to go off like about 30-40 sec. for the smoke detector to dectected the 9V backup battery power sourced.The green power LED light indicator will stop flashing also the beeping sounds too.

kenmore elite, alarm kept going on and b flashed on and off. I finaly figured out on bottom of freezer there is a battery door open it and change 9v. thats it,

According to the Kidde website, this unit was discontinued in 2010. If the unit is more than 10 years old it must be replaced per NFPA 72 (assuming you live in the US)

Ours keeps chirping even after we replaced the battery. I'm not sure how to fix it.

We are going to try and clean it but if it keeps doing it after that then I guess it means it needs to be replaced, right?