Astec 49DV "22 CallEngineer"

[TMNA]

Yesterday the alarm went off in the house for no apparent reason. The following message appeared once I cleared alarm "22 Call Engineer". Bar calling the engineer that installed system, is there something else that I could do to resolve problem. Cannot set alarm at the moment.
Thanks

[Admin]

A sounder, a smoke detector or a relay card has been disconnected.
The displayed fault is cleared when the fault is rectified.
When you try to set the system it should give you more information about the fault.

[TMNA]

Thanks for that Will let you know how I get on