PA1000 Alarm problems?

Hi,

Alarm seems to be giving us weird signals when I come to lock it after a journey.

sometimes I shut the door, press the remote to arm the system and the doors will both lock fine

but
- the door leds double flash,
and after about thirty seconds the hazzard lights start flashing ( but no horn or other alarm sound ).

I went round opening and re-closing all the doors, boot, bonnet etc. to make sure they were al shut,

I also used the remote to unlock them - and the hazzards flashed 6 times = which is the system warning that the ignition has been tampered with! - so must be a fault somewhere??
Could it be the engine blower fan - it's disconnected at the moment as the temp sensor is broken, so maybe the heat reading si teling the fan to operate....so car alarm brain thinks someting is active???? clutching at straws

did the same again - hazzards started flashing after 30seconds.

tried a third time.....now all fine, door leds back to a single flash every second etc.

In the manual it says the door led double flash = ultrasonic is disabled.
don't mind that, but do want the hazzards flashing to stop!


Any ideas what the cause of this is?