Geoff Harvey Posted December 8, 2007 Share Posted December 8, 2007 I've been up and running now for over a week; 128 LOR channels, but then last night, one channel blew both transformers connected to it. On checking things out to-day, the LOR channel seems to be operating. (Turns on / off with the hardware utility and the program), however, while checking, it blew another transformer within a few minutes while turned on under the hardware utility. I put a higher rated transformer on (240V to 24V, 36VA instead of 22 VA as originally supplied with the lights), and again it seemed to be operating, but again failed within a 10-15 minutes of operating in the show.This is 1 channel of 16 which all run mini-trees. The LOR board is in its 3rd year of operation. It is a CTB-16D green board and heatsink. In the 3 years of operation of LOR, I have only ever had 2 transformers fail prior to this as isolated occurrences.I wonder whether there is a mode of triac failure which could leave a channel apparently operating, but which causes transformers to fail.Any advice would be much appreciated.Thanks Geoff Harvey Link to comment Share on other sites More sharing options...
LightORamaDan Posted December 8, 2007 Share Posted December 8, 2007 Hi,It is possible that the triac has has a partial failure and is now only providing 25Hz rather than 50Hz. In that case it would overheat transformers.Dan Link to comment Share on other sites More sharing options...
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