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Old 06-08-2016, 09:44 PM   #1
tld
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Air Conditioner and Battery Question

I have a 2016 Eagle HT. I've used the air conditioner many time while spending time earlier this year in South Texas. But, I was always connected to shore power. So, the other day I fired up my generator and connected it to the trailer. But I had my battery disconnected. And when I tried to turn on the A/C nothing happened. But I was getting 120 volts at my 120 volt receptacles in the trailer. Went back out to the battery and turned on the battery disconnect switch and went back in and turned on the A/C and it came on just fine. So I guess my question is, is this normal. I was surprised that the A/C wouldn't work without the battery connected????
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Old 06-08-2016, 09:52 PM   #2
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I think the thermostat requires the 12 volt system.
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Old 06-08-2016, 10:50 PM   #3
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In a stick house A/C system the thermostat works on low voltage supplied by a small transformer in the HVAC system wiring. In an RV, the low voltage necessary for control is supplied by the RV's 12-volt house power system.

So dzwiss is absolutely correct, you need 12-volts to make the A/C work!
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Old 06-09-2016, 06:35 AM   #4
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You should not need the battery connected to run the air conditioner while connected to a generator. Your converter should be supplying the 12V system.
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Old 06-09-2016, 06:40 AM   #5
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Quote:
Originally Posted by tnchuck100 View Post
You should not need the battery connected to run the air conditioner while connected to a generator. Your converter should be supplying the 12V system.
2x

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Old 06-09-2016, 07:50 AM   #6
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Guessing he had used the battery disconnect switch, think only the smoke & propane detectors get power then...

Just came back from a trip where one of the folks converter went out, eventually the batteries died and a/c then quit... he ended up using a battery charger to get through the rest of the trip... I now keep a 10amp charger handy...
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Old 06-09-2016, 08:19 AM   #7
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Guessing he had used the battery disconnect switch, think only the smoke & propane detectors get power then...
1. The smoke detector has its own 9V battery and does not use the 12V system.

2. The propane/CO detector uses the same 12V system as the rest of the camper. The battery disconnect switch will remove power from the detector if there is no converter output.
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Old 06-09-2016, 08:25 AM   #8
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Battery switch turned off the 12v to the thermostat. This is normal operation. Must be on to work.
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Old 06-09-2016, 12:54 PM   #9
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Our trailer is the same way. We found that even after shore power is connected, we must have the battery switch on. I'm guessing it's because those A/C appliances still get their power from the inverter, and need DC power.

Quote:
Originally Posted by tld View Post
I have a 2016 Eagle HT. I've used the air conditioner many time while spending time earlier this year in South Texas. But, I was always connected to shore power. So, the other day I fired up my generator and connected it to the trailer. But I had my battery disconnected. And when I tried to turn on the A/C nothing happened. But I was getting 120 volts at my 120 volt receptacles in the trailer. Went back out to the battery and turned on the battery disconnect switch and went back in and turned on the A/C and it came on just fine. So I guess my question is, is this normal. I was surprised that the A/C wouldn't work without the battery connected????
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Old 06-09-2016, 04:09 PM   #10
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Reply from Jayco

Well, I contacted Jayco and here is their response taken from an email they sent me. "I have asked our line engineers about your concerns and with a response from them I can tell you that no the A/C will not function without the battery being connected. The thermostat gets its power from the battery at all times not the converter." So, there you have it. If your battery is dead, no A/C for you!!
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