Have generator power no AC power

[RollTideRVer]

I have a 2001 Discovery by Fleetwood 37U. Last week I had issues with the rear A/C unit and the hot water heater not working will plugged up to 30amp shore line. Now nothing will work on the shore line. On the smart EMS board it shoes 30amp service and green lights by all units supplied, (water heater, A/C I, A/C 2, refrigerator, etc..). If I start the generator it shows it is switched over to the generator and everything works as it should. I'm new to RVing and at a lost.

[RollTideRVer]

Dropped the RV off at the dealer yesterday. 2 week wait of course due to time of the year. They have 42 bays and stay full most of the year. Which means they do good work or there is a lot of broke RV's out there and no where else to take them!!! I had a jack issue also. Hope all is covered on my warranty!!!
I will post what they find!!! Thanks for the replies!!!

[YC_1]

If your load shedding relays got confused because of the extreme load of an AC and Hot water heater on at the same time and your battery charger cut back and they ran low etc etc.

Well, I would disconnect shoreline and turn both banks of batteries off in the battery compartment. Not just any switches you may have. Getting the 12 volts off the coach circuits could bring it back up. I would not run AC and hot water heater on electric with 30 amps. This brings you right to the edge of the limit. I have done it but first turn my charger down to 20% rate.

[Golden_HVAC]

Yes I am at a loss too.

It does sound like something that you will need to take it to the dealer to fix it. Sorry.

From what you described, the first thing I would check is the input voltage from shore power to the transfer switch. It seems like from the transfer switch to the RV main panel while the generator is running, everything is normal. So the problem should be between the power cord and the transfer switch input from shore power. It is a short distance.

You might have a loose terminal, or broken wire in the power cord, or plug, or someplace in between. If you have a discolored plug, you can replace that for only about $20 - $35 in parts.

Next thing to check is find the generator transfer switch, and measure the input voltage while plugged in, and output voltage. It should be 110 - 125 volts in and out. There should be less than 1 volt across the input to output terminal. More than 1 volt drop indicates a problem with the transfer switch contacts, and a need to replace the transfer switch.

Then start the generator (with shore cord unplugged) and see if you are getting 105 - 135 volts input and output (again, less than 1 volt across the terminals from input to output). Turn on the A/C unit, and the voltage should drop to something between 110 and 122 VAC. (It can spike when there is no load on the generator to around 125 - 130 volts, 135 is not un-usual.)

Fred.