radio interface problem on a gardtec 840

[KDS]

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

[paul44]

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

Failing that try defaulting the panel and reprograming.

 

[al-yeti]

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