when you initially power up a pir floodlight it will illuminate for a length of time then go out-this proves the light fitting.
i guess the "sensor" you mentioned is the pir?
confused over pir and photocell cos photocell when covered would simulate darkness and light would turn on,pir would not turn light on as it would already be lit.
is there an option to use either photocell or pir.
check setup section of instructions.
would be helpful to see controls and options.
wiring may be correct.
dave
March 2008