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Old 09-18-2020, 06:36 AM   #1
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Inverter overload

I have a Heart Interface Freedom 20D that's flashing overload when the RV is either hooked to shore (50amp) or when running generator or engine. If I turn off the inverter all is good while hooked up or running. Does this sound like an inverter issue or transfer switch? Thanks for any help.
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Old 09-18-2020, 06:54 AM   #2
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Check your batteries. Possable low on water.

Once on shore or generator power, the unit switchs to a battery charger.
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Old 09-18-2020, 08:08 AM   #3
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Batteries are actually less than a year old and full. They are showing 13v on the display board, thanks
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Old 09-18-2020, 08:30 AM   #4
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Has this setup worked before or is it a new installation?

Anything been changed or messed with since it last worked?

Is it showing output overload or battery overload?
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Old 09-18-2020, 08:46 AM   #5
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Yes, everything was working fine, unplugged from shore power to move rv and noticed battery light on dash. Went to the inverter monitor and noticed the overload light was blinking and had no power to microwave. The overload light that's flashing just says overload, nothing about battery or output. Thanks
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Old 09-18-2020, 10:00 AM   #6
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Thinking possibly transfer switch
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Old 09-18-2020, 10:38 AM   #7
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The automatic transfer switch selects between shore or generator power, before that power gets to the inverter/charger.

Unless your ATS is integrated into, and part of the Xantrex, its not your problem.

Inverter /chargers take some of the shore/generator power and use it for battery charging and pass some thru to what ever the inverter powers.

Could be running hot from a bad cooling fan in it.
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Old 09-18-2020, 10:42 AM   #8
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I think the first thing would be to find out what is "overloading" the inverter/charger. Because on shore power or generator the inverter should pass-through the 120VAC and revert to charging the house battery bank, this suggests the inverter pass through has failed, not your ATS, and that whatever load is present is too much for the inverter's safety. Your batteries appear to be charged (~13v) so either the charger part of the inverter seems to be working or they're being charged by the the engine alternator.

Cycling the power switch on the inverter is supposed to re-set the flashing lights.

In most coaches with 50 amp service, the inverter usually feeds a small breaker box of its own (unless the inverter only powers 1 circuit). I'd turn off those breakers (will kill the microwave and probably AV/TV stuff, plus a couple other outlets) and then fire up the genny or connect shore power and see what happens. IF the inverter remote shows it's happy, turn on the load breakers.

The other reason I'm doubting it's your ATS - you're not reporting other outlets or appliances not working. If the inverter gets power from Line 2 (for illustration purposes), then other loads on line 2 would not work if the ATS was only switching Line 1, or if there was a termination failure on Line 2.
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Old 09-18-2020, 10:44 AM   #9
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Remove circuit loads from the output, see if the error persists. Still errors, then likely inverter issue. If no error, add loads back one circuit at a time to see if a perticular circuit is the priblem.
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Old 09-18-2020, 10:54 AM   #10
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Also, rear air is not working. Thermostat is powered up, related or not, I'm not sure.
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Old 09-18-2020, 11:14 AM   #11
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Here is a link to your manual.


Page 34 reads, for a blinking Overload light, "Inverter mode- Shutdown, diagnose problem using DC Amps
bargraph. Charger mode- Excessive DC voltage ripple.
Remove loads from DC battery bank. See LED 5 in the
Troubleshooting chart page 34,

Plugged in or on generator, you would be in the Charger mode.

Page 34 shows LED 5 to be, "Battery overload caused by excessively discharged batteries. Refer to p. 15."
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Old 09-19-2020, 07:58 AM   #12
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Ok, tried again this morning. While plugged into shore power, ac input and inv/charging lights are on, showing 20 amp dc input and batteries at 14v . Unplug from shore, inv/chrg light constant and overload blinking, also microwave making funny noise like power interruption or something
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Old 09-19-2020, 08:23 AM   #13
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And I think it smoked my tv in the bedroom ��
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Old 09-19-2020, 08:45 AM   #14
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Sc3020... this has nothing to do with your inverter problem, sorry, but twice in this thread you’ve commented on your battery’s status with incorrect understanding of your RV’s battery monitor.

A fully charged battery is ~12.7v. So if your monitor says 13v or 14v etc you are only reading the charge voltage being applied by your chargers or alternator.

Voltage battery meters are nearly worthless because a battery must fully be at rest for the reading to be valid. At rest means that no charge voltage nor any usage load has occurred with in the last hour or so.

When charging you see that charge voltage. Then for up to an hour after all changing has stopped the reading indicates a surface charge residual from the charging. On the other hand, if you are not charging but using the batteries to power something the voltage will drop with the usage, but over time the voltage will go back up as the battery rests.

The meter is accurate that’s not the issue, it’s just that you rarely ever see your batteries at full rest condition.

As I said this doesn’t help you with your inverter’s problem, but hopefully is instructive for how to interpret the reading from your battery Voltage monitor.

PS. There are battery monitors that measure amps in and out of your batteries, not voltage, that can provide accurate battery state of charge readings without the need for your batteries to be at rest.
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