To address comments privately to the moderating team, please address: moderator@xxxxxxxxxxx To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews ------------------------------------------------------------------------ There are 2 messages in this issue. Topics in this digest: 1. Re: Fan Fail Light Without Actual Fan Fail From: Martin Gutkowski <webmaster@xxxxxxxxxxxxxx> 2. Whatever happened to # 502?? From: "spaceace3113" <spaceace3113@xxxxxxxxx> ________________________________________________________________________ ________________________________________________________________________ Message: 1 Date: Mon, 13 May 2002 09:52:20 +0100 From: Martin Gutkowski <webmaster@xxxxxxxxxxxxxx> Subject: Re: Fan Fail Light Without Actual Fan Fail Hi Jim Do I take this to mean you have the OEM fan fail module? I have had the opportunity to take mine apart and I thoroughly concurr with the statement (if it's there, throw it away!). Forgive me if I start talking too techy here... the fan fail module is a simple hall effect sensor. It measures the current drawn by each fan and if there's an imbalance between the two, the current generated by the coil is enough to light the light. Wonderful, if it weren't so badly made! I imagine there's a slight imbalance in your two fans - nothing to loose any sleep over - but at 13.5v there's enough difference to turn the light on. At the moment mine has a simple 4-way daisy-chain of spade terminals so that the fans and the fan-fail light all come on at the same time. This is a very simple way of telling you that power has been fired to both fans. I have designed but not yet built a fan sequencer which restores the fan-fail light functionality. I discovered these superb high-side switches which have an integrated "status" output which can be used for the fan fail light directly. Mine treats each fan seperately and detects a short or open circuit. The circuit diagram is here (duplicate for each fan) http://www.delorean.co.uk/electronics/fandelay2.jpg to read an explanation, you'll have to join dmc_electrics and read the archives :-) Martin #1458 jwit6@xxxxxx wrote: >I know I could probably just go with one of the fan fail fixes out there but >I'd like to understand a little more about what's actually happening. >Originally I had a fan fail indication when the spade connectors on the two >circuit breakers would heat up and sometimes trip the breaker. Those >connections are now fixed for good. No appreciable heat build up, resistance, >or current draw. > ________________________________________________________________________ ________________________________________________________________________ Message: 2 Date: Mon, 13 May 2002 11:37:13 -0000 From: "spaceace3113" <spaceace3113@xxxxxxxxx> Subject: Whatever happened to # 502?? i was reading through the archives and noticed that 502 was on ebay awhile back...what happened with it? how much did it go for ? or is it still available?? it wouldnt be that hard to twist my arm into coming up with some creative financing for that one ________________________________________________________________________ ________________________________________________________________________ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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