mpageler Posted February 13, 2018 Share Posted February 13, 2018 Got a used MW SE-600-12. Hooked it up and found that the fans runs constantly, even with no lights connected. Pretty noisy sitting on the workbench but once in the enclosur, not very noticable. Have a number of tLRS-350-12 and the fan cycle on and off, based on the ouput load. Just curious if this is normal for SE serries or larger amp MW power supplies? BTW, started hobby withthe ;cheaper Chinese 30amp MW knokoffs and their fans never go on. Link to comment Share on other sites More sharing options...
dibblejr Posted February 13, 2018 Share Posted February 13, 2018 3 hours ago, mpageler said: Got a used MW SE-600-12. Hooked it up and found that the fans runs constantly, even with no lights connected. Pretty noisy sitting on the workbench but once in the enclosur, not very noticable. Have a number of tLRS-350-12 and the fan cycle on and off, based on the ouput load. Just curious if this is normal for SE serries or larger amp MW power supplies? BTW, started hobby withthe ;cheaper Chinese 30amp MW knokoffs and their fans never go on. I have a bunch of 750’s they never come on without lights however my matrix 750 runs every time I walk by it. The ccr tree not. Circles not Bemch testing I never heard them Could it be that someone put a jumper to make it run continuously? JR Link to comment Share on other sites More sharing options...
k6ccc Posted February 14, 2018 Share Posted February 14, 2018 4 hours ago, mpageler said: Just curious if this is normal for SE serries or larger amp MW power supplies? BTW, started hobby withthe ;cheaper Chinese 30amp MW knokoffs and their fans never go on. Most of my stuff is running on Ray Wu knockoffs. The fans run intermittently under load - never that I've heard with no load. Link to comment Share on other sites More sharing options...
Santas Helper Posted February 14, 2018 Share Posted February 14, 2018 Exactly the same here. eBay purchase though. But same results with the fan. Link to comment Share on other sites More sharing options...
uncledan Posted February 14, 2018 Share Posted February 14, 2018 I have 30+ of the Meanwell RSP power supplies varying from 150w to 3,000w. They all do the same as you describe. I plan on using a couple Intermatic Digital timeclocks to power the supplies on and for the show so the fans don't run 24/7. For what these things cost you would think the fan wouldn't run all the time... Link to comment Share on other sites More sharing options...
TheDucks Posted February 14, 2018 Share Posted February 14, 2018 Are they running warm? The thermistor (I suspect it will contact the main HS) some place may be damaged or misplaced. If the fan runs full speed, the fan control transistor may be shorted Link to comment Share on other sites More sharing options...
mpageler Posted February 14, 2018 Author Share Posted February 14, 2018 Did some more research and it does appear it depends on the MW model, whether it has continuous on or temp controlled on/off . Took a look at some of the datasheets for model and didn't find any fan types listed. Might be for higher amp PS's, that it's better to relie on a continuous fan versus the chance of the temp sensor failing. BTw, found several youtube on using a fan speed controller to quiet larger output MW's. Thanks for the replies. Link to comment Share on other sites More sharing options...
sticks4legs Posted February 24, 2018 Share Posted February 24, 2018 I have a few 350w knock off supplies and the fan does run constantly, no real effect just that I find the little cooling fans only make it about 2 years before a bearing goes. Link to comment Share on other sites More sharing options...
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