Marc
its more than just heat , its also humidity...try and maintain no more than 75 degress with really good circulation to the supplys and 35-50% humidity no more, humidity also causes dust to accumulate which will then cover components and insulate any heat they are throwing off thus causing them to fail so always keep supplies clean. Im stable at 40% and 73 degrees. Let your supply cook all day long at 80-85 degrees no circulation and best believe you are cooking supply components, it will be just a matter of time for the supply to fail. Its not uncommon to see extra circulator fans in machine rooms, e psu are more prone to failure than the g psu but the g psu has its issues as well. Thermal trips are usually a tell tale sign that something is going to fail eventually, i suggest one checks the transistors for proper spec after a thermal issue the next part and it usually happens is the crydom rectifier going out to lunch and taking a transistor or 2 with it. Having properly setup supplies ive learned is a must especially when you are running 2 supplies and changeover, you must balance the load to the console from the supplies so that 1 supply isnt doing all the work for the rail. Even if you only use 1 supply make sure its voltages are correct, never assume that just because the supply and console are on that everything is a ok. Hope this helps a little
