also your z4 tamper is that. Its the last signal the panel recieved it is waiting for a tamper restore to clear it. Turning the battery off will ensure it cant send any signals
if you have engineer access and its an old galaxy then remote comms is on by default. If newer one then it will be on manager auth iirc. You using a 232 module?
Also is a pir suitable for the room, Can you post a photo of the room from the pir position.
What settings are the sesnsor set to and im assuming no pets?