Why can I not set my alarm system?

Optimax XM6 system.

Basically, when decorating a room I accidently cut through one of the sensors alarm wiring - I had enough 'play' on the wire so simply re-wired it into the sensor.

The alarm is currently on day mode as per usual but when I enter my code to set it it just has the red lights on all three of my zones and makes a beeping noise (different to the set noise). None of the sensors are sensing either as the red light on them is not flashing.

I have triple checked the wiring and have reset the system to factory default ... anyone suggest anything else?