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should cooling pump run all the time?


ninja2
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Hello all,

 

I brought a Corsair H60 cooler a couple of years ago and finally unboxed it. I'm using it for an unusual cooling purpose, not in a PC, instead controlling it using an Arduino microprocessor, and a 12V supply for the H60 wiring. So basically the Arduino is simulating PC connections & control.

 

I've have the fan working fine and can control it's speed using 4 pin connector and PWM. And I can measure fan RPM using sense pin, so all good.

 

However after I wired up the 3-pin connnector for the pump and applied 12V I can't feel the pump working. Using my trusty multimeter I found it's pulling 15mA from the 12V line most of the time, but every 3 or 5 seconds (approx) it jumps up to approx 300mA, but only briefly. But the pump remains silent / and still all the time, AFAIK.

 

Also no action on the sense pin

 

Is this normal behaviour for the pump?

 

Note I haven't applied any heat to the pump body yet. Maybe the pump has a temperature sensor and only turns on when it's warm enough?

 

Any info appreciated ...

 

TIA

Edited by ninja2
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No, the H60 is pretty low tech. A power lead for the pump and it should turn on around 9v or wherever the exact starting voltage lies. Normal operation is a steady 12v which usually produces a “speed” of around 4000 rpm. It’s not loud, but you be able to tell it’s running.
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ah OK, thanks. Seems mine's not working, darn!

 

I haven't mounted the pump unit so it's just sitting on desk loose / vertical. I assume this makes no difference, it should still work?

 

If it's failed I may as well pull the pump apart to see if I can fix it (nothing to lose). What type of fluid is used in these devices?

Edited by ninja2
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It should be pretty easy to tell if it's running when on the table. It's a smaller unit with a high speed pump, so there is definitely a signature hum and mild vibration.

 

The coolant is probably just the usual high water concentration with some proply-glycerol and anti-corrosives. However, before you take it apart you are likely still in the warranty period if you can dig up a copy of the receipt. If not, I'll warn you in advance... sometimes they make these things difficult to take apart - on purpose. I have tried before on a few and it has always been a one way trip. Screws that won't come out without damaging the plate or mount and there isn't a clear fill valve or similar if you are successful.

Edited by c-attack
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being the curious sort I took the chance and pulled it apart. Very compact / interesting design. The copper heat exchanger is quite impressive - the pump forces the fluid through many (maybe 100) fine parallel copper fins mounted perpendicular to the thick (~3mm) copper base plate. picture attached for anyone curious.

 

I think I found the problem, although I did destroy it in the process. I unscrewed the mini circuit board but there are two very fine wires to the pump motor which broke as I pried the board up. But it looks like one was always broken.

 

Anyway the good news is I got another H60 and it works fine ... thanks fr yr help (including the warning :)

191414675_H60pump1.thumb.jpg.9d8e22374bb40e317763768f6901ee9a.jpg

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