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Old 11-25-2014, 03:49 PM   #11
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Quote:
Originally Posted by bubbles View Post
But the genny has its own alternator for running. External power (battery 12 volt) needed only for start. Not sure about fuel pump though.
This is not true. On our version of generator there is no local 12v source. It requires good batteries to power the ECU. It also requires a good converter to charge the batteries to keep up the 12v source. When the generator died, I'd bet you saw the light blink on the switch. This indicates an error code. When mine did this, it showed that the ECU volts were to low. If your house batteries are really dead, you need to hold the aux switch long enough for the change over switch for shore power to change and for the inverter to start charging the batteries. Don't ask how i know this.
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Old 11-25-2014, 03:52 PM   #12
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When house batteries are charging, and reach 13.3 volts, the isolator switch closes, and then the chassis batteries also receive a charge. The switch also closes when the drive engine is charging the chassis batteries and 13.3 volts are detected and then the house batteries receive charge. This switch closure is indicated by the aux start switch lamp dimly lit. When no charging occurs, and voltage drops, the isolator switch opens, the aux switch lamp goes out, so that the chassis batteries are less likely to discharge to the level that the drive engine will not start. The aux start switch is a manual control to the isolator switch.


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Old 11-25-2014, 04:20 PM   #13
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As a related side note, do you know how to use the Automatic Generator Start to keep you batteries charged?
Should eliminate the issue in the future.
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Old 11-25-2014, 05:21 PM   #14
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Yes we do but I don't typically set it on short trips. He said he set his to gen up at 10volts. I heard it go on once and thought oops I didn't set mine. I will start my trips now with AGS.


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Old 11-25-2014, 08:30 PM   #15
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Old 11-25-2014, 08:35 PM   #16
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10 volts on the AGS? Maybe part of the problem. See chart:

Mine is set to AGS at 12.0 volts.

Not sure what length trip you would not use it, but for us, if we do not have campground power the residential fridge pulls the battery down to about 12.0 volts within 6-8 hours max.

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Old 11-25-2014, 10:04 PM   #17
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That's right, you're talking diesel genny. They have glow plugs. No alternator needed. Sorry.
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Old 11-26-2014, 08:52 AM   #18
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Even though the cabin batteries are deep cycle type; for good life of the batteries, they should not be drawn down below 12 volts.
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Old 11-26-2014, 12:00 PM   #19
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Thanks for the info. I'm going to print it for my binder. Also add it to the list of what not to do again! The list is big and growing!


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