I think maybe the fan does not turn on until it needs to be on. There could be a temperature sensor. If the unit is not warmth it makes sense that the fan is off
Is the fan 2, 3, or 4 wires? If 3 or 4 then this means one wire is a tachometer used for speed feedback, and they would not have that if the fan speed was not controlled Finally, check the voltage on thefan motor, If this is a 12 volt fan and there is 12 volts and the fan is not moving then the fan is broken. But if there is something like 3 volts then the fan controller has decided no cooling is needed. On Fri, Jul 16, 2021 at 12:35 PM Alan Condit <condit.a...@gmail.com> wrote: > > Chris, > > The unit doesn’t seem to be warm. > I adjusted the voltage down to 42 volts, to provide some headroom. I am > using KL5056 stepper drivers and they say max 50 volts. There is definitely > power to the fan because if I try to turn it it snaps back to the fixed > position. The voltage is rock steady at 42 volts. > > I wonder if it is just the fan or fan controller that is bad. > > I bought the power supply a year or so ago but this is the first time I > have applied power to it. Maybe I will have to open it up and see if I > could replace the fan. > > Alan > > > > From: Chris Albertson <albertson.ch...@gmail.com> > > Subject: Re: [Emc-users] Meanwell SE600-48 Power Supply > > Date: July 15, 2021 at 12:21:10 PM CDT > > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net > > > > > > > > If you place your hand on the power supply and feel no heat, then I'd > > expect the fan to be off. > > > > I some a good size power resistors mounted to a heat sink with a fan > that I > > used for testing power supplies. Testing with no dummy load is not very > > meaningful. The load is set up so it can be quickly rewired with > > resistors in series or parallel in different ways using a terminal block. > > > > On Thu, Jul 15, 2021 at 9:19 AM Alan Condit <condit.a...@gmail.com> > wrote: > > > >> I am building a new controller cabinet. I installed a Meanwell SE600-48 > >> power supply. When I turn on the power supply the fan doesn’t turn on. > If I > >> leave the power supply on for a little while I hear an intermittent > >> clicking (like a relay) but no fan. Does it have some kind of > temperature > >> control on the fan? Is it not turning on because I currently have > virtually > >> no load on the power supply? > >> > >> Thanks, > >> Alan > >> > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > > > > > > -- > > > > Chris Albertson > > Redondo Beach, California > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
