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07-18-2022, 12:49 PM
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#1
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Junior Member
Join Date: Jul 2022
Posts: 6
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No 110AC without 12vDC?
I've got a FR VLight, 2013, new to me.
I'm tracking down some electrical issues, I know I need to replace the 12v charge controller, as it's just dead.
But when I disconnect the 12v batteries (via switch or having them off the system) I also loose my AC - why is that? [I'm really trying to learn the electrical system, not just take it to the shop and stay uninformed]
Isn't there a 110 to 12v converter in the power panel that should power the 12v when a battery isn't connected?
1. is it part of the same charge controller that I know is dead
2. am I looking to replace a 110 to 12v converter as a second part.
Is there a way to get the original parts and replacement parts list from Forest river?
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Flagstaff V-Lite 30WFKSS #10712
F250 6.7PS pulling -
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07-18-2022, 12:59 PM
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#2
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Senior Member
Join Date: Nov 2017
Location: Dayton Ohio
Posts: 3,599
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Pretty easy.
Put your voltmeter on the battery. Should be 12-12.6 volts. Thermostat might work on less.
When plugged in the converter is usually a minimum of 13 volts measured at the battery.
Not sure what the charge controller is. Usually that is a solar thing. If you have a panel then on a sunny day the voltage will be over 13.
Yes the thermostat is usually dc.
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07-18-2022, 01:03 PM
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#3
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Senior Member
Join Date: Jul 2014
Location: Hawkins, Texas
Posts: 1,243
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Not for sure what you are calling a 12v charge controller? If you have a stand alone converter that makes 12vdc out of shore power, that would be the reason that the 12vdc items do not work with the battery disconnected. Some of the items in your unit require 12vdc for the control of the item, as well as AC shore power. An example of the this your AC and the frig, both items need 12vdc for the control board as well as 120vac for the unit to operate.
I would replace the 12vdc charge controller and then retry all of the items.
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Chuck & Sandra
Engineer/Teacher
2010 F350 CC 6.4
2015 Prime Time Sanibel 3601
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07-18-2022, 01:03 PM
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#4
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Senior Member
Join Date: Jan 2013
Location: Space Coast of Florida
Posts: 4,022
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Yes, the thermostat uses 12 volts to operate..same for furnace.
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07-18-2022, 01:15 PM
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#5
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Senior Member
Join Date: Jul 2014
Location: Hawkins, Texas
Posts: 1,243
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This is a good video that shows how to troubleshoot your problems.
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Chuck & Sandra
Engineer/Teacher
2010 F350 CC 6.4
2015 Prime Time Sanibel 3601
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07-18-2022, 01:26 PM
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#6
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Senior Member
Join Date: Sep 2020
Posts: 741
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Are you asking about the air conditioner or the 110V outlets?
Your thread title says "110ac" which to me means 110V alternating current like your house uses.
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07-18-2022, 01:46 PM
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#7
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Senior Member
Join Date: Dec 2021
Posts: 552
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Basics: the converter takes your 120VAC shore power and makes 12VDC to charge the battery and run the 12V stuff in the trailer.
Inverter takes the 12VDC from the battery and makes 120VAC.
When you say that you loose your AC when you disconnect the battery are you talking about the air conditioner or the 120V outlets? If its the air conditioner, then as noted, it needs 12V to run the thermostat. If its the outlets, you need the battery connected so the inverter can make the 120VAC.
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2019 Palomino Solaire 147X
2013 Ford F150
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07-18-2022, 05:25 PM
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#8
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Senior Member
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 9,616
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Inverter?
Quote:
Originally Posted by TacomaJoe
Basics: the converter takes your 120VAC shore power and makes 12VDC to charge the battery and run the 12V stuff in the trailer.
Inverter takes the 12VDC from the battery and makes 120VAC.
When you say that you loose your AC when you disconnect the battery are you talking about the air conditioner or the 120V outlets? If its the air conditioner, then as noted, it needs 12V to run the thermostat. If its the outlets, you need the battery connected so the inverter can make the 120VAC.
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Joe, I'm not sure a 2013 trailer would have an inverter.
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Larry
"Everybody's RV is not like your RV."
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Sticks and Bricks: Raleigh, NC
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07-18-2022, 05:35 PM
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#9
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,845
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Quote:
Originally Posted by Larry-NC
Joe, I'm not sure a 2013 trailer would have an inverter.
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x2
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