X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 01 Feb 2008 22:23:49 -0500 Message-ID: X-Original-Return-Path: Received: from mta16.adelphia.net ([68.168.78.211] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2710851 for lml@lancaironline.net; Fri, 01 Feb 2008 09:37:10 -0500 Received-SPF: pass receiver=logan.com; client-ip=68.168.78.211; envelope-from=glcasey@adelphia.net Received: from [75.82.216.175] by mta16.adelphia.net (InterMail vM.6.01.05.04 201-2131-123-105-20051025) with ESMTP id <20080201143629.QZZD12521.mta16.adelphia.net@[75.82.216.175]> for ; Fri, 1 Feb 2008 09:36:29 -0500 Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-8-231088777 X-Original-Message-Id: <39CB4E96-E40C-4678-B27A-62BFAFF7C697@adelphia.net> From: Gary Casey Subject: Re: Overvoltage X-Original-Date: Fri, 1 Feb 2008 06:36:27 -0800 X-Original-To: "Lancair Mailing List" X-Mailer: Apple Mail (2.752.2) --Apple-Mail-8-231088777 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Steve, Sounds like everyone was waiting for someone else to reply - including me :-) All the responses were good, but here is a way to make sure nothing could possibly be damaged and you can leave anything on you like: Disconnect the OV unit and start the engine normally, but limit the speed to idle or just over. The alternator can't put out enough current to produce an over-voltage situation and you can then gradually increase the engine speed while looking at the system voltage. If the voltage comes up to "normal" and stays there as you increase the rpm to maybe 1,000 the voltage regulator is clearly working and I would presume the OV module is at fault. If the voltage climbs over 16 then something is wrong with the voltage regulator. In any event, as long as the battery stays connected it would be extremely difficult for the system to go into a dangerous over-voltage condition as it will absorb the current produced by the alternator. The most likely cause of an over-voltage condition, in my experience, is a loose connection at the battery or cables and I would thoroughly check that before doing anything. Good luck. Gary Casey > > From: Steve Reeves > Date: January 31, 2008 12:44:28 PM PST > To: lml@lancaironline.net > Subject: Overvoltage > > > Hi guys, I didn't get any response last time I asked so I figured I > would check again. Is there any danger in me bypassing the > overvoltage to check to see if that is causing a problem. This > would be strictly a ground runup for a couple of minutes. Thanks. > > Steve Reeves > Glasair 1FT 38SR > --Apple-Mail-8-231088777 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 Steve,
Sounds like everyone was waiting for someone else to reply - = including me :-) =A0All the responses were good, but here is a way to = make sure nothing could possibly be damaged and you can leave anything = on you like: =A0Disconnect the OV unit and start the engine normally, = but limit the speed to idle or just over. =A0The alternator can't put = out enough current to produce an over-voltage situation and you can then = gradually increase the engine speed while looking at the system voltage. = =A0If the voltage comes up to "normal" and stays there as you increase = the rpm to maybe 1,000 the voltage regulator is clearly working and I = would presume the OV module is at fault. =A0If the voltage climbs over = 16 then something is wrong with the voltage regulator. =A0In any event, = as long as the battery stays connected it would be extremely difficult = for the system to go into a dangerous over-voltage condition as it will = absorb the current produced by the alternator. =A0The most likely cause = of an over-voltage condition, in my experience, is a loose connection at = the battery or cables and I would thoroughly check that before doing = anything. =A0Good luck.
Gary = Casey

From: Steve Reeves <sreeves@sc.rr.com>
Date: January 31, 2008 12:44:28 PM = PST
To: lml@lancaironline.net
Subject: Overvoltage


Hi guys, I = didn't get any response last time I asked so I figured I would check = again.=A0 Is there any = danger in me bypassing the overvoltage to check to see if that is = causing a problem.=A0 This = would be strictly a ground runup for a couple of minutes.=A0 Thanks.

Steve = Reeves
Glasair 1FT 38SR