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 > Is my alternator going?

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kilboar

Citrus county

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Posted: 08/16/22 12:53pm Link  |  Quote  |  Print  |  Notify Moderator

I have a 2017 Coleman 30' TT that I keep parked at a camping ground where we have power at. It sit for 4-6 weeks then it gets used for 3-4 days and repeat.

I had to replaced the battery in a few months back, I forgot those things needed water:-/ and put in a gel battery and now I'm hearing the small cooling fan running at variable speed most of the time. I assume it's cooling the alternator. It's back behind the fuses in the bottom of the TV consul Anybody familiar with this. I've owned the TT for a few years and never heard it run like this before.

I have photos on my phone but not sure how to post from the computer.

Any help is greatly appreciated

schlep1967

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Posted: 08/16/22 01:05pm Link  |  Quote  |  Print  |  Notify Moderator

Your camper does not have an alternator. It has a converter. It converts A/C voltage to D/C voltage. Yes the fan runs when it is working properly. You will notice that the more 12 volt lights or vent fans you turn on the louder the fan will get. Totally normal.


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kilboar

Citrus county

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Posted: 08/16/22 01:28pm Link  |  Quote  |  Print  |  Notify Moderator

schlep1967 wrote:

Your camper does not have an alternator. It has a converter. It converts A/C voltage to D/C voltage. Yes the fan runs when it is working properly. You will notice that the more 12 volt lights or vent fans you turn on the louder the fan will get. Totally normal.


Ok, thank you.

I have all LED lights and I'll have the TV on in the evening but I'll hear the fan running all night when the lights are all out. I guess fridge is running.

My understanding is the Coleman TT needs a 12v battery for the AC to run, which it runs a lot in the summer. My feeling is the battery is getting depleted while I'm not using it then try's to get to full charge the 3 days it's plugged into the 30amp outlet.

Your help is very appreciated. I'm new to this.

MFL

Midwest

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Posted: 08/16/22 01:35pm Link  |  Quote  |  Print  |  Notify Moderator

All converters (not alternator) are not equal, so hard to say how normal yours is. If you have not heard the converter fan running often, in the previous several years of ownership, then you may have an issue.

If you have a digital volt meter, what does it read at the battery posts, with the converter in use. A reading of 13.2 is a float charge, and anything over 13.6 is indicating the converter is charging to catch up.

You say your camper is at a place with available shore power, so if plugged in, not disconnect switch shut off, your battery should be at full charge, each time you return.

If you are not plugged in while away for a month, yes your battery is depleted, may be damaged.

Jerry





enblethen

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Posted: 08/16/22 01:50pm Link  |  Quote  |  Print  |  Notify Moderator

Connected to shore power, it sounds more like a failing battery.
Take it to your local auto parts such as AutoZone or O'Rielly's and have it tested.


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kilboar

Citrus county

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Posted: 08/16/22 01:53pm Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

All converters (not alternator) are not equal, so hard to say how normal yours is. If you have not heard the converter fan running often, in the previous several years of ownership, then you may have an issue.

If you have a digital volt meter, what does it read at the battery posts, with the converter in use. A reading of 13.2 is a float charge, and anything over 13.6 is indicating the converter is charging to catch up.

You say your camper is at a place with available shore power, so if plugged in, not disconnect switch shut off, your battery should be at full charge, each time you return.

If you are not plugged in while away for a month, yes your battery is depleted, may be damaged.

Jerry


Ok, I'll check the voltage at the battery next time I'm up there.

Yes I do unplug the battery when I leave because we have heavy trucks and side by sides running over the cord a lot. We're burying the power line now so I could leave it plugged in the future just wasn't sure that was a good idea. It's in a lot of woods 4 hours drive north of me.

valhalla360

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Posted: 08/16/22 01:55pm Link  |  Quote  |  Print  |  Notify Moderator

If the converter is running properly, just leave it plugged in. It will stop charging once full. If you unplug when you leave, there likely are small loads dragging the battery down during the week and then on the weekend, it needs to do a big charge which can take hours to get all the way to 100%.

At 5yr old, not surprising if the battery needed replacement, so hard to say if there was a problem or it was just old.

Do a little online research to find out if your converter is suitable for a Gel battery. They have a different charging regime and the wrong can quickly damage it. Assuming you are typically plugged into a pedestal, just get a basic flooded lead-acid battery, no point in getting fancy.

Yes, the cooling fan will run when charging the battery or when there are other significant 12v loads. When running 12v devices, it will cause the system to go into charging mode. Something small like the air/con thermostat by itself doesn't draw enough to trigger this, so if the battery is fully charged, the lights are off and no other 12v devices are in operation, you shouldn't hear the fan running (it might kick on once in a while for a short period but shouldn't be running a lot)


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theoldwizard1

SE MI

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Posted: 08/16/22 02:00pm Link  |  Quote  |  Print  |  Notify Moderator

kilboar wrote:


My understanding is the Coleman TT needs a 12v battery for the AC to run, which it runs a lot in the summer.

Highly UNLIKELY ! I have never heard of a AC requiring 12VDC.

kilboar

Citrus county

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Posted: 08/16/22 02:09pm Link  |  Quote  |  Print  |  Notify Moderator

theoldwizard1 wrote:

kilboar wrote:


My understanding is the Coleman TT needs a 12v battery for the AC to run, which it runs a lot in the summer.

Highly UNLIKELY ! I have never heard of a AC requiring 12VDC.


It may have not been the AC but something else. Do these TT come with owners manuals?

kilboar

Citrus county

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Posted: 08/16/22 02:12pm Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:

If the converter is running properly, just leave it plugged in. It will stop charging once full. If you unplug when you leave, there likely are small loads dragging the battery down during the week and then on the weekend, it needs to do a big charge which can take hours to get all the way to 100%.

At 5yr old, not surprising if the battery needed replacement, so hard to say if there was a problem or it was just old.

Do a little online research to find out if your converter is suitable for a Gel battery. They have a different charging regime and the wrong can quickly damage it. Assuming you are typically plugged into a pedestal, just get a basic flooded lead-acid battery, no point in getting fancy.

Yes, the cooling fan will run when charging the battery or when there are other significant 12v loads. When running 12v devices, it will cause the system to go into charging mode. Something small like the air/con thermostat by itself doesn't draw enough to trigger this, so if the battery is fully charged, the lights are off and no other 12v devices are in operation, you shouldn't hear the fan running (it might kick on once in a while for a short period but shouldn't be running a lot)


Thank you much.

I'll look into the Battery compatibility .

* This post was edited 08/16/22 02:18pm by kilboar *

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