Kevin, Glad you were able to trace the problem! This a good reminder for those with external regulators.
Joel On Wed, Jul 9, 2014 at 12:58 PM, Kevin Driscoll via CnC-List < cnc-list@cnc-list.com> wrote: > After cleaning all the terminals, checking fuses etc. I found that the > wire from the alternator to the external regulator had corroded and fallen > off. I didn't see it at first because it's buried in my tight engine > compartment. Of course in hindsight I might have checked the regulator > earlier. Good thing is that u understand my charging system a whole lot > better and all the connections have been refreshed. I also got my link 20 > battery monitor working again. > > Had a couple of nice days in Victoria BC and pushing off for Arbutus cove > on discovery island soon. What a beautiful place to cruise... > > Kevin > 30-2 > Portland > > Sent from a mobile device. > On Jul 6, 2014 7:18 PM, "Josh Muckley" <muckl...@gmail.com> wrote: > >> 35v may infact be the open circuit voltage. Check if you are getting 35v >> at the battery terminals. That would explain the heat. Sounds to me like >> a bad charge regulator or bad interconnecting wiring on the sensing line. >> A standard lead acid 12v system should be limited to ~14.7v. Double that >> for a 24v system. >> >> With an external regulator the regulating terminal on the alternator >> connects to the regulator. This single wire provides the feedback to the >> alternator that it is providing enough (or not enough) voltage. Simple >> regulators rely only on voltage but the better external regulators will use >> a shunt to provide a current feedback to the regulator as well. The >> current is/should be directly proportional to the differance in voltage >> between the battery and the alternator output. The current should also be >> limited (by limiting the difference in voltage) to the max charging voltage >> of the battery (type) and the max output of the alternator. >> >> Disrupting the current and/or voltage sensing lines to the regulator or >> the regulating line to the alternator will cause improper voltage output >> from the alternator. 35v sounds VERY improper. This "disruption" is the >> reason that turning the ignition key to the off position before pulling the >> stop plunger can cause a blown alternator on some systems. The key >> disrupts the regulating signal and the alternator goes to max output. >> >> Let us know what you find. >> >> Josh Muckley >> S/V Sea Hawk >> 1989 C&C 37+ >> Solomons, MD >> On Jul 5, 2014 12:05 PM, "Kevin Driscoll via CnC-List" < >> cnc-list@cnc-list.com> wrote: >> >>> On our anniversary sail up to Victoria, we pulled in to Gray's harbour, >>> Wa last night because the batteries are not charging. Looking for >>> suggestions of diagnosis / solutions. See below: thanks >>> >>> The alternator belt was somewhat loose but I tightened it and no luck on >>> charging. Tested terminals on back of alternator and reading was same >>> before and after tightening... About 35 volts. >>> >>> About to start this morning by checking / cleaning battery terminals and >>> other connections from alternator back. Hoping this could be the issue >>> because as I previously posted my starter has been giving me the clicks. I >>> have the faint glow on the Charging indicator lamp at the engine panel too. >>> I have a heart interface "incharge " alternator regulator. >>> >>> Any other suggestions? >>> >>> Thanks >>> Kevin >>> >>> Sent from my Tablet >>> >>> _______________________________________________ >>> This List is provided by the C&C Photo Album >>> >>> Email address: >>> CnC-List@cnc-list.com >>> To change your list preferences, including unsubscribing -- go bottom of >>> page at: >>> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >>> >>> >>> > _______________________________________________ > This List is provided by the C&C Photo Album > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go bottom of > page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > > -- Joel 301 541 8551
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