Hi all, I have just installed a Galaxy Flex 20 panel which has a trigger module installed however the siren which is connected using op1 and op2 (bells and strobe) on the trigger module as per instructions and other cables connected to panel as normal (0v, 12v and T) the siren does not sound under test or alarm. The siren has power and will sound if power removed from panel as normal. Im at a loss why this is can anyone shed some light on this please. The siren is a Texecom Odyssey X3.