Eurosec ( PR5208 rev 1.0 is the Inst. Manual Reference )
I think the panel is a CP7 or CP8 - wired system.
What sort of detector is it?
Is it a PIR or a DT (DualTec) of some sort?
Knowing which one will illicit a more accurate answer to your problem.
Follow up here, don't start again.
acorn, June 2011