Erratic lighting

[Gordon Wearne]

Hi All

this my first post I have expanded my system this year adding 5x16channel dc units and 2x 24 channel rgb to the 4x 220volts units from last year the DC units are randomly switching  on  there is no pattern in the fault but go off after  they have  cycled , the DC units are installed  on the far end off a 20m run of cat5 any ideas, where to look.

 

Thanks Guys