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Post by ringer on Sept 26, 2022 16:43:51 GMT -5
I have a KZ connect C241RLK 2018 travel trailer. My battery wouldn't run anything and since it was 4 years old I figured it was bad and got a new one. It will charge up but when the 12-volt refrigerator comes on everything cuts out. Battery show 12.88 volts. It seemes to me to be the wfco ultraIII WF-8900 series that must be at fault or could I have just gotten a battery with a dead cell?
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Post by lynnmor on Sept 27, 2022 9:20:36 GMT -5
If you are not plugged in to shore power the converter is not in the picture. Check the voltage at the battery and at various places inside the trailer while turning things off and on. Also check before and after the circuit breaker usually near the battery. We need better information if you still can't find the problem.
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Post by ringer on Sept 27, 2022 19:29:54 GMT -5
The battery was always connected to shore power but we had an outage and the battery only lasted about 15 minutes. The led lights and fridge 12V 11A draw were on. After charging the battery, an everstart 750 crank group 27 109 Ahr at 1 A I could run led lights but after fridge came on it lasted about 15 minutes. I had 2 multimeters that would measure current but they don't seem to work so I couldn't measure actual current draw. As far as I know the convertor connections run to a cutoff switch and then to the battery. I'm going to get another battery tomorrow and try it.
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Post by tightwadted on Sept 28, 2022 6:33:54 GMT -5
you state the battery is an everstart 750 crank group 27, sounds like you have a regular car battery not a true deep cycle, not what you want in a camper situation. that being said, i would think it would last longer, but if you are getting a different battery, anyway, get a true deep cycle RV battery. JMHO
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Post by ringer on Sept 28, 2022 8:39:34 GMT -5
I should have said 27DC. It is a marine/rv battery.
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Post by ringer on Sept 28, 2022 13:36:45 GMT -5
Okay. I couldn't get another battery right away so I thought I'd do more checky. Took Ohm meter and started from battery positive to convertor board connector. Good connection. Took battery out and charged it up. Put in pickup truck and it fired right up. Put back in rv. turned on frige and lights and immediately shut off. There must be something on circuit board that shuts off if current or voltage is too low. Took battery out and put back in truck. Fired right up. Another thing is that when the tow vehicle is hitched up the power is good. I wonder if it is because the alternator will put out 13.75 volts up to rated load. Battery won't.
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Post by Edd505 on Sept 28, 2022 20:53:26 GMT -5
check the relay, out near the battery on the frame? Then check the ground from the battery to where ever.
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Post by ringer on Sept 29, 2022 10:48:20 GMT -5
There is no relay. The battery wire goes from battery through disconnect switch then to DC board on distribution center. Ground is okay.
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Post by Edd505 on Sept 29, 2022 22:11:23 GMT -5
There should be a breaker looks like this, on the TT's it's under along the frame. My 5W uses these relays in the front storage compartment.
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Post by ringer on Sept 30, 2022 10:34:01 GMT -5
Ok, I found it. It was upside down covered with a red plastic cover. I thought it was just a terminal but it's a shunt. Checked ok. Ran a wire from battery ground to ohm meter and checked ground wire that hooks to battery. Good. Ran wire from wire where battery positive connects back to battery terminal. Good. Pulled convertor and didn't see any blown capacitors or burnt resistors.
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Post by Edd505 on Sept 30, 2022 23:23:58 GMT -5
Ok, I found it. It was upside down covered with a red plastic cover. I thought it was just a terminal but it's a shunt. Checked ok. Ran a wire from battery ground to ohm meter and checked ground wire that hooks to battery. Good. Ran wire from wire where battery positive connects back to battery terminal. Good. Pulled convertor and didn't see any blown capacitors or burnt resistors. Found what? The breaker was under a red cover? I'm confused as to what you found, like this? Circuit Breaker |
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Post by ringer on Oct 1, 2022 10:55:56 GMT -5
The one on the left in your photo was on the frame with the two lugs sticking up. It had a red rubber or plastic cover over the top. I thought it was just a bus bar. It measured 0 ohms across it.
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Post by Edd505 on Oct 1, 2022 22:04:52 GMT -5
The one on the left in your photo was on the frame with the two lugs sticking up. It had a red rubber or plastic cover over the top. I thought it was just a bus bar. It measured 0 ohms across it. Got it, it's supposed to be a self reset breaker, why they mounted it where they did is a mystery. I would think it would be in a weather proof area, they are available at most auto parts and cheap, I would carry a spare now that you know what it does. |
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Post by ringer on Oct 2, 2022 8:34:50 GMT -5
But it still doesn't explain why when the refrigerator comes on the power immediately dies, even with a fully charged battery. The KIB monitor shows fully charged battery even when the disconnect switch is off. The lead for it comes from the distribution panel. I have a current meter coming today and will try to measure the charging current and when it is switched to battery power.
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Post by lynnmor on Oct 2, 2022 11:36:18 GMT -5
The KIB monitor is simply a crude voltmeter, it will display full whenever the trailer is on shore power, it only gives an approximation of state of charge when not connected to shore power. All you need is a simple voltmeter to test the charging, use it on the battery and it should show above 13 volts when on shore power.
That circuit breaker should be mounted with the terminals down, (they never are) otherwise the can will collect water.
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Post by Edd505 on Oct 2, 2022 17:43:45 GMT -5
Volt meter is a must for any RV to trouble shoot any electrical issues, they can be had for about $10 up, I have a $25 I use all the time that I carry in the truck tool box. Part of the I'm away from home and might need to make some kind of repair.
As for the drop in voltage I would start by getting a charger on your new battery to insure it's fully charge not just a surface charge. Option two take it to a place that can load check it.
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diferg
Newbie RV’er
2019 KZ 270THLE / 2006 ST-1300
Posts: 32
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Post by diferg on Oct 3, 2022 9:32:37 GMT -5
replace the faulty circuit breaker that trips when there is a load applied and does not reset until there is no more load. very cheap and easy to eliminate this possible problem. make sure to read the rating on the circuit breaker!
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Post by ringer on Oct 4, 2022 18:08:35 GMT -5
Guys, that did it. I bypassed the breaker on the frame, and everything kept running. It was cutting out at 7 amps. Thanks to everyone that came to my aid, special thanks to Lynnmor and diferg. It explains why the tow vehicle kept things going because it didn't go thru that breaker.
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