Inverter Problem.....I think ??

[blacklab]

On my '95 Royale we used to be able to run the front roof air and/or the microwave off the inverters. 2X 2500 Heart. On our last trip when we were not running the gen, the microwave wasn't powered up while running off inverter power. The batteries were '01 vintage so I bought & installed new AGM's. Still no power to microwave or roof air, but everything else works as it should (I think). I noticed that the converter charger wasn't working/humming as usual so I checked the outlet it was plugged into & it had no power to it. No blown fuses either. So I plugged it to extention cord and it is now working. After 4 days of charging, still no inverter power to microwave. Where do I start??

[Jon Wehrenberg]

Blacklab....

This is a generalization because I am not familiar with how Royale wired its inverters. Heart has as many as 9 ways to install the inverters so I will speculate a little. First, the facts, then the guesses.

Your inverters need a circuit of 120 VAC to power them. You do not say what specific model you have for inverters, but regardless there is going to be one input, or two. The inverter input(s) need power so verify the breaker to the inverter has not tripped, and then verify you have power to the inverter input(s) at the inverter.

If the inverter has dual inputs one may be labeled transfer and the other charger. If it has a single input it will be labeled as such.

Verify the circuit breakers at the inverter face have not popped.

If you have power to the inverter, and the breakers have not tripped you should have power to the inverter output. Verify that. If you do not have power out, but have power in the inverter is not functioning as an inverter. Check the DC voltage at the house batteries to see if the inverter charger is functioning. If the charger is functioning you should have at least 13 VDC (26VDC) with no load, and likely a higher voltage. Less than that the inverter charger is not working.

If you have two inverters the probability that both have simultaneously failed is slim. If all but only one circuit has failed focus on that single circuit. Has the breaker tripped. Does the microwave have a GFCI receptacle that has tripped? Is there a fused protection at the microwave, such as in the rear of it?

If the inverters are working you will hear a hum, you will likely hear the cooling fans cycle on and off, they will feel a little warm, and you will have power in and out. If that all checks out on both inverters the problem lies elsewhere.

If you can get more specific it might be possible to zero in on the specific issue.

[Jerry Winchester]

I'll bet it is a ground problem.

[blacklab]

I have no AC output on the #2 inverter, so i'm thinking that #2 would power the items not getting power now. BTW, the converter charger reads 28.91 volts. Should I replace both inverters? They are original to the coach.

[dalej]

I would move slowly on this, two new inverters is not considered a small fix, $$$.

I would check to see if you have a transfer switch, its a small 5 x 5 inch or so box that switches A/C and inverter power to the house. I have lost two in 9 years, so I would check little things first before starting to replace things to find the problem.

[blacklab]

Any Royale owners out there know where to look for this?