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Electrical Gremlin - Intermittent - Pursuit 3070

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Electrical Gremlin - Intermittent - Pursuit 3070

Old 07-13-2014, 08:29 AM
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Default Electrical Gremlin - Intermittent - Pursuit 3070

We saw it again yesterday. While trolling the 14" Furuno Touchscreen went off. The VHF started showing low battery. The co detector started beeping. Looked at the dc voltmeter and it showed 10-11 volts. Pushed the battery parallel switch and it jumps back to 14-15 volts. Tried shutting down all nonessential load including pumps, stereo, radar, etc. not sure if that helped but a little while later back up to 14 volts. Turned everything back on and held fine remainder of day. Seems like something intermittent in the battery charging system and affecting the house battery. The starting batteries are gp27 interstate marine lead acid deep cycle cranking type about a year old. The house battery is a new diehard gp31 agm. The alternators on the new twin f300 Yamaha engines are much higher output than the old ox66's were. Not sure exactly what the issue is or how to correct. Could there be an issue having an AGM along with the lead acid batteries in the same bank? Could it be something about the Pursuit 3070 Offshore battery management system?
Old 07-13-2014, 09:45 AM
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There's a large contingent of people out there who would strongly recommend not mixing battery types in the same bank. If you do a quick google search you can read to your heart's content about the various theories and arguments about it. Some say you can, most say you shouldn't. Personally, I'd lean towards the majority and try to have them all the same. Is that the sole reason for your issues? No idea. But it's not a bad place to start.

Also might be worth inspecting the way that everything is hooked up. The F300 has a dedicated Aux charging output that can be wired to directly charge a battery or a battery bank, not related to the alternator charging output. For example, my engine charges the starting battery using the traditional alternator output, but the Aux goes directly to my house bank. Both banks will charge when the engine is running, but they are separated completely from each other.
Old 07-13-2014, 11:14 AM
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I had a similar issue with my 3070, it ended being one of my Hellamarine battery switches in the TABS battery management system grey box, replaced all three switches and that solved the problem...Also, recently had an issue on my charging system not charging my house bank of batteries...took the TABS box out and sent it off to Jack Wells of Wells Marine and for about $90 he went through the system and replaced a bad circuit board which cured the problem.

Old 07-13-2014, 11:29 AM
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Yes, I've had problems with the Hellas switches and have probably replaced each at least once. Seemed more prevalent for the switches controlling the starting batteries. The problem I'm having sounds more like something in the circuit board as the seems to be intermittent and seems to occur more when operating at trolling speed. Just repowered and all new electronics so a lot of possibilities.
Old 07-13-2014, 11:53 AM
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Maybe so...when my circuit board went it did impact the ability of the engines to charge the house batteries (did not impact the starting batteries). However, it was not intermittent, it completely stopped the charge direction to the house. Might consider sending Wells an email describing the problem, I found them to be very responsive.

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