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Old 10-24-2018, 08:36 PM   #1
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How do these breakers work?

So all over my coach I have these red "buttons" with different amp numbers on them.

How or Why would I use them? They don't seem to press in. Do they "pop out" if they are "blown" and then you press them in to reset?

Not sure if the photo is big enough, but I mean the red buttons down the right side of the photo.

Also, what does ACR mean? I have 2 red buttons labeled CHASSIS ACR and DOMESTIC ACR.
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Old 10-24-2018, 09:13 PM   #2
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Yes they are resettable circuit breakers and will pop out if a short is detected, just reset by pushing them back in after they cool a minute or so , if they pop again then you have a problem that needs to be fixed. much better than fuses in my opinion, guessing that ACR is "accessories". Looks like you have a well built coach.
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Old 10-24-2018, 09:14 PM   #3
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They are push button breakers. If they trip, the button pops out. The only way to trip them is short them out, don't do that.

Wild guess on ACR. Automatic Charging Relay. Are the 2 breakers 150 or more amps ?
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Old 10-24-2018, 10:15 PM   #4
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Both of the ACR breakers are 60 amp.

My silverleaf is saying that my house batteries are not being charged while driving. I am trying to see where I should start?
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Old 10-24-2018, 10:19 PM   #5
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Quote:
Originally Posted by nutcker View Post
". Looks like you have a well built coach.
Thank you, and I agree.

I just wish I understood all the systems better.

Right now, the inverter in that picture is not connected. One of the cooling fans broke and to replace it, you have to flip the inverter over.

I was nervous about attempting this, but so far it's going well. Fan came in today so tomorrow I will put it in and hopefully everything will go back together without me electrocuting myself!
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Old 10-24-2018, 10:41 PM   #6
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So this item is on the back wall and yes, ACR is automatic charging relay. Not sure what this item is doing exactly and if it is why the house batteries are not being charged.

Actually, I have not confirmed they are not charging - so guess I should do that first.
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Old 10-24-2018, 10:45 PM   #7
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Guess how the item works is answered here:

https://www.bluesea.com/support/arti...atteryLink_ACR

Will have to do some testing once I get the inverter all hooked up again.
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Old 10-25-2018, 08:47 AM   #8
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You have two DC circuits in the coach. One is the chassis, usually only one battery and the other is the house, usually two batteries.

When the gen set is on or you are hooked up to shore power the house batts are being charged thru the inverter. Once the house batts reach approximately 13.5 volts the ACR or whatever device is installed closes its circuit and now allows charging volts to the chassis batt.

When you are traveling down the highway the alternator charges the chassis batt and I believe (not 100% sure on this) once the chassis batt reaches its 13.5 volts the house batteries get their charging volts.

This system has to be this way so you don't back feed the alternator from the house batteries because if you do then the alternator sees a voltage and goes into an idle mode not putting out power to the chassis battery.

Hope I didn't confuse and also hope I didn't miss lead anyone.

Enjoy that coach, fun times ahead....
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Old 10-25-2018, 10:55 PM   #9
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yeah... that's basically how I understand things.

I have 2 coach batteries and 4 house batteries - but that doesn't change anything.

I never noticed a problem before when driving - but my trips haven't been that long and many times the generator is running which charges the batteries - so I'm not really sure if my house batteries are going down or not when I'm driving. It could just be that the Silverleaf is not connected to the batteries properly?

I'll be driving to Florida come end of December, so I won't be running the generator for the roof A/C while driving. If the engine is really not charging my house batteries, I guess they'll go down over the 5 or 6 hour trips.
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Old 10-26-2018, 09:37 AM   #10
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I'll be driving to Florida come end of December, so I won't be running the generator for the roof A/C while driving. If the engine is really not charging my house batteries, I guess they'll go down over the 5 or 6 hour trips.[/QUOTE]

Tony if you have a volt meter just fire up the diesel and check the voltage on the chassis battery. It should be upwards of 13.5 / 14 volts. If not then possibly an alternator issue.
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Old 10-26-2018, 10:41 AM   #11
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Tony if you have a volt meter just fire up the diesel and check the voltage on the chassis battery. It should be upwards of 13.5 / 14 volts. If not then possibly an alternator issue.
Chassis battery charges fine. Silverleaf is saying the house batteries are not being charged.

Thought of just starting the coach and checking the house batteries, but worried it would not be accurate because I believe there's electronics that don't allow the house batteries to charge until the chassis battery meets a certain number.

Obviously, if I leave running long enough - that should solve the issue. I still may do this method next time I fire up the coach.
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Old 10-26-2018, 03:30 PM   #12
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Start the engine wait 15 minutes and see if the chassis battery gets to 13.4 or more volts. That's the typical setting of most devices.

Yours is adjustable and may be set high, loot at the pointer in the hole on the ARC. See if its at 13.4 .
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Old 10-27-2018, 08:06 AM   #13
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Thanks... i will check that dial. I plan to do one more test run before I hit the road for Florida so that will be a good time to check.
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Old 11-15-2018, 09:22 AM   #14
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Just to close the loop on this thread.

To recap quickly - I determined that when I am driving the coach, the house batteries are not being charged. When I am plugged in or running the generator, the chassis batteries are not being charged.

I took a final "test" ride before I head to Florida next week and while the engine was running I went into the basement to look at the inverter, and the breakers above.

All lights were green on inverter, and the battery link, so just for laughs I started to press in on all the red buttons shown above.... and sure enough, the ACR DOMESTIC button moved a little more than the others! I pressed a little harder on that one and heard a beautiful CLICK noise.

Jumped out to check Silverleaf and it was now charging the house batteries!

Bottom line is when these breakers "pop out"... they are not obvious like other breakers. Visually, I don't even think I could tell it was sticking out further than the others. If you look at the photo, the second button from the bottom is the one that was "tripped" and it doesn't look any different to me.

Anyway... hope this helps someone else down the road.
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