2009 Raptor 3110 Power Converter

[egpeil]

I'm pretty sure my power converter is going bad - power shutdown while running a/c full blast, lights dim and brighten and dim again. I found a new IOTA just like the one the owner's manual says it has but I'm not sure where is located. I assume it's behind the fuse panel and looking for confirmation although hoping it's easier to get to than removing the fuse panel.

[chuckster57]

Behind the breaker panel is the most common place since there is probably an outlet molded into the back side. If your panel is near the front, it may be easier to remove the back wall of the basement to access it.

[ChuckS]

I’d first verify the DC output of that converter. You may have had a low 120 volt issue from your park pedestal or some other feed issue.

I’d look behind the rear access compartment in basement and behind stairs for your converter

[JRTJH]

The lights are all 12VDC, so if there is a 120AC "brownout" condition and low AC input voltage, the battery system "should take over" and provide 12VDC to keep all of the DC system operational. This is essentially the same thing as unplugging the shore power cord and the lights "seamlessly switch from converter to battery power. With your lights "dimming with a low voltage AC input power would suggest a battery problem.

I'd first check the batteries for low water level. Then disconnect the POS and NEG terminals and check the battery output. It should be around 13-13.6 VAC. While the terminals are disconnected and with shore power supplied to the trailer, check the output from the converter AT THE TERMINALS. You can not check the converter output with the batteries connected, you must remove the cables from the battery to do this check.
If there is low voltage, no voltage or high voltage at the battery terminals (when disconnected) then the converter is bad. If there is 13.6VDC at the battery terminals, chances are the converter is functional and not the problem.

Back to the beginning, if the 12 volt lights "dimmed with batteries connected" then it's likely a battery (not converter) problem.

[egpeil]

That'll be my task this weekend then - do these tests. Thanks.

[JRTJH]

That'll be my task this weekend then - do these tests. Thanks.

Looking back at my response, I think I need to clarify a point:

When you disconnect the battery cables, check the battery output "at the battery terminals"

While the battery (or batteries) is/are disconnected, check the converter output "at the battery cable terminals" (not the battery terminals)

With the batteries connected to the trailer battery cables, with shore power applied, you won't be able to check the battery voltage and you won't be able to check the converter output. Both are "interactive" so you must disconnect the battery terminals, check the battery separately, then check the converter (at the cable ends) to properly verify output.

Sorry if my first response might have been confusing. Good Luck and let us know what you find.