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Old 12-10-2017, 06:51 PM   #1
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Brand: Thor Motor Coach
State: Georgia
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THOR #6090
Inverter Issues on Ace 29.3

We have a 2018 Ace that we are having inverter issues. We have had it at CW twice, and the last time they replaced the inverter. However, when we went to pickup the MH the inverter stopped working before we left the CW lot. They kept it another week and checked it again and it wasn't working. They looked at the battery and it was OK. So the next day they started up everything and it was OK. The initial issue was as we were driving down the road all was OK and then the inverter stopped working. The first time we took it to CW they said all we OK and didn't find an issue. We took it to a different CW, where it is now, and they are the one that replaced the inverter, but now don't know what is going on. Failed to say we were always getting a EO5 overload reading. I'm wondering if it would be a battery issue or even wiring. Any advise would be helpful.
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Old 12-11-2017, 11:11 AM   #2
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I have the same problem with my 2017 29.3. I look forward to see what others have to say. To clear the E05 code I remove all battery cables and reattach that will clear the code for a time anyway then it comes back.
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Old 12-11-2017, 01:02 PM   #3
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Model: ACE 27.1
State: Florida
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THOR #7035
An "overload" shutdown would be from the AC end of the inverter. They way Thor wires these coaches it could be anything from a pinched wire with an intermittent short to wiring the Air Conditioning to run off the inverter.

Disconnect the AC side from the inverter to verify this, then start tracing the AC wiring from the inverter.
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Old 12-11-2017, 04:07 PM   #4
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We are at CW now picking up the MH. As soon as we turned on the engine the EO 5 error came on. We didn't have anything on..no AC, no frig, no TV. ☹️ Everything works if we turned them on but we shut them off before starting to see what would happen
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Old 12-11-2017, 04:11 PM   #5
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Quote:
Originally Posted by Tfryman View Post
An "overload" shutdown would be from the AC end of the inverter. They way Thor wires these coaches it could be anything from a pinched wire with an intermittent short to wiring the Air Conditioning to run off the inverter.

Disconnect the AC side from the inverter to verify this, then start tracing the AC wiring from the inverter.
Quote:
Originally Posted by travelingcat View Post
We are at CW now picking up the MH. As soon as we turned on the engine the EO 5 error came on. We didn't have anything on..no AC, no frig, no TV. ☹️ Everything works if we turned them on but we shut them off before starting to see what would happen
Turning things off will not help you troubleshoot a wiring issue.
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Old 12-11-2017, 05:15 PM   #6
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So if with nothing running you still get the overload error, its probably a wiring issue, rather than a specific appliance or equipment. CW is going to need to get a tech, familiar with electrical to troubleshoot, uninterrupted until he finds the fault.
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Old 12-20-2017, 02:43 PM   #7
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So we are picking up our MH for 4th time at CW after having inverter issues. We are told, again, it works. But now they are telling us this is a Thor issue. That Thor didn't put in a large enough battery capacity to handle everything including the satellite which we had installed by CW. So I guess we will have to put up with the EO5 error They also told us Thor would not approve a different inveter so we only got a new one, but same model. Any suggestions.?
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Old 12-20-2017, 08:13 PM   #8
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Inadequate battery capacity should not cause an inverter error. If the battery is fully charged, the inverter should work fine, maybe for a short time, but for as long as you have adequate voltage going from the battery to the inverter, there should not be an error indicated. I'm not convinced CW really has completely trouble shot the problem. I know, or get that you are kind of locked in with CW, but if it were me, I would directly contact Thor and ask them to recommend another shop so you can get this solved.
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Old 12-20-2017, 10:54 PM   #9
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From all I've heard about CW I wouldn't even let the change my oil.
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Old 12-21-2017, 09:40 AM   #10
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As I am having the same problem. I called Xantex for some help, very nice to work with. After explaining what is happening, it was determined that the xm1000pro was going bad, or at least something inside of the unit was going bad. I called Thor for warrenty replacement and of course I missed warrenty by 3 months.
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