Hi, I am new to here but not to alarms.  I  spent nearly 25 years crawling through lofts but now due to medical issues I can no longer do it.  However, my home alarm is a Gardtech 840 which has given great service is not playing ball.  I installed a radio interface with a wireless zone expander (the early type stamped with a B) However, my issue is I need to remove the wireless expander and module to enable me to fit it on another system in my workshop.  I go into programming say NO to wireless expander fitted. bingo I can come out of engineer no problem.  When I go back into engineer mode and physically remove the interface from the data line I come out of engineer and the panel shows Zex 8 tamper....  When I go back into engineer mode it still shows No to wireless being fitted.   Any ideas???  

 

Thanks

Have a go at down powering in and see what happens when you power up. 

Failing that try defaulting the panel and reprograming.

 

Do you need to remove the devices before the expander? Just wondering if it's firmware quirk