menvier 9651 wont set after wires cut?

My carpet fitter cut through the alarm wires, so I had to get someone out who solder it back together for me. Since then the alarm wont set or it takes me 4 to 5 goes before it will set. when it wont set it shows Done 01 Z01 then flashes Zone Open Z01 then the internal alarm goes off.

Ive checked the door connectors and they seem ok, not that I'd know if they weren't but they look ok, so i'm wondering if its the wiring?
any advice would be appreciated , thanks