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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Dell PowerConnect fan question
As anyone who owns one knows, the fans in a Dell PowerConnect 5324
network switch are horrendously noisy. Therefore, following the suggestions I see all over the 'Net, I bought a pair of Sunon KDE1204PKV3-MS.AF.GN fans. One of the two new fans keeps the "Fan OK" LED green but does not spin. The other one spins but activates the red "Fan Error" LED. Is there any simple explanation for this? With the original Delta screamers, the red LED switched on only when a fan was disconnected or prevented from turning. Anybody else here done this fan substitution? Does a "working" (i.e., spinning) Sunon fan activate the green fan LED rather than the red one? Perce |
#2
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Dell PowerConnect fan question
On Sun, 15 May 2016 00:00:40 -0500, legg wrote:
On Sat, 14 May 2016 23:22:15 -0400, "Percival P. Cassidy" I do see one difference between the fans I bought and the ones referred to in Brad Poulton's comment on YouTube: mine are KDE1204PKV3-MS.AF.GN, whereas he mentions KDE1204PKV3-MS.AR.GN Perce methinks that is just direction of airflow. RL Wrong. See Pg 08 https://media.digikey.com/pdf/Data%20Sheets/Sunon%20PDFs/Maglev%20Catalog.pdf to decode the part number. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#3
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Dell PowerConnect fan question
Here is another quote:
"Just a note to add that if you use the version of those Sunon fans with the "F" 3rd wire output (frequency or "tacho" output) then the switch will register a fan fail - you need the version that has the "R" (Rotation) type 3rd wire output which is a basic constant 5v or 0v output depending on whether the fan is stalled or running" https://www.youtube.com/watch?v=1_dM0pBRfOI&t=0s |
#5
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Dell PowerConnect fan question
On Sun, 28 Aug 2016 09:59:44 -0700 (PDT), wrote:
Here is another quote: "Just a note to add that if you use the version of those Sunon fans with the "F" 3rd wire output (frequency or "tacho" output) then the switch will register a fan fail - you need the version that has the "R" (Rotation) type 3rd wire output which is a basic constant 5v or 0v output depending on whether the fan is stalled or running" https://www.youtube.com/watch?v=1_dM0pBRfOI&t=0s Well, that's your answer on the part number. However, you can probably simulate the "R" type by simply integrating the frequency output of the "F" type with a large capacitor. To the Dell switch, the pulse train would look like a DC voltage. It's easy enough but I don't want to recommend a circuit until I see what kind of load the Dell represents (TTL, CMOS, transistor circuit, etc) and what levels it expects. F versus R type: http://www.sunon.com/uFiles/file/03_products/07-Technology/005.pdf You could also just pull down to ground the 3 fan sense wires on the Dell. (see waveform on the R type above). There would not be any indication of a fan failure, but it would work. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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