Re: (ET) FW: charger problem

Well, I've had two cups so far and I'll have to agree with RJ;

The harder the charger works, the louder it hums.

-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of RJ Kanary
Sent: Monday, May 11, 2009 10:33 AM
To: paul mitchell2007 comcast net
Cc: Elec-trak tufts
Subject: Re: (ET) charger problem

I'm confused.{ But then it IS Monday morning, and I've had but one cup of coffee.} What flavor of ET are we working on? The first charger diagram I pulled up (since I'm just guessing. <G>) shows an S1 and an S3 but no S2.

Wire 30 goes to CB-2.It HAS to be there, or the charger's output is not directed to the battery pack. The loud humming noise you hear when it's connected could well be the sound of the charger doing exactly what it's supposed to be doing. Charging. :)

What conditions existed previously to start this investigation?

Fetching that much needed second cup of Joe........

RJ

paul mitchell2007 comcast net wrote:

Hi,

My charger hums quietly when plugged in and the #30 wire from the circuit breaker is not attached to S2 on the charger, but when attached to S2, makes a very loud humming noise. The capacitor is brand new and I a local alternator shop that rebuilt all my tractor motors told me that the diodes are fine (they recently replaced them). The resistance from each diode to the heat plate measures zero. Any ideas? Do I need a new heat plate? If so, where do I get one?

Thanks!

Paul

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