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Old 03-25-2016, 07:29 PM   #31
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So this evening, I go out to move my RV, and as soon as I unplug the 50A shore power, my microwave turns off and my fridge starts beeping at me about no AC power. The master switch by the door is on. I reset it just in case, but still no power. My meter is dead, so I can't tell if they have any power, or if the inverter has quit. All of circuit breakers seem to good.

I have no idea..

Any suggestions?
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Old 03-25-2016, 07:36 PM   #32
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Unless you have the fridge in the auto mode it won't switch to gas. As to the micro do you have the inverter turned on?
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Old 03-25-2016, 07:43 PM   #33
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If I am correct your Seneca has a Norcold which can run on propane or 110-volts AC. But unless Jayco changed something, the AC mode of the fridge only works when actually plugged in to shore power or with generator running. The AC function is not fed off the inverter. Only the microwave and TV work off the inverter circuit.

As far as the microwave going off, do you mean the clock? The inverter needs to be on and the batteries have to be in a good state of charge or the inverter will shut down. That was one of the first signs I experienced telling me that my coach batteries were shot, the inverter would not stay on due to 12-volt voltage sag.
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Old 03-25-2016, 07:57 PM   #34
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Yes, the clock went out. Good to know about the fridge not being on the inverter circuit.

I was worried my batteries might be bad, with the jacks having issues and all.

I will turn the propane back on to supply the fridge when travelling.

How to I tell if the inverter is on? How do I turn it off or on?
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Old 03-25-2016, 08:10 PM   #35
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Originally Posted by SuddenRush View Post
So this evening, I go out to move my RV, and as soon as I unplug the 50A shore power, my microwave turns off and my fridge starts beeping at me about no AC power. The master switch by the door is on. I reset it just in case, but still no power. My meter is dead, so I can't tell if they have any power, or if the inverter has quit. All of circuit breakers seem to good.

I have no idea..

Any suggestions?
I know you said you were new to motorhomes, not sure how much dealer might have explained to you about your appliances and electronics. Please don't be offended if I say something you already know. But sometimes the orientation dealers provide can leave much to be desired.

Several of your systems will only work off of regular house current, 110-volts alternating current (AC). These include your air conditioners, televisions, and microwave. The inverter on our Senecas takes 12-volts direct current (DC) and converts it to 110-volt AC. However the inverter only feeds a few select 110-volt outlets including the microwave and the bunk television and the TV in the bedroom. My outside TV does not work off the inverter. Any 110-volt devices other than inverter-fed ones must have 110-volts supplied by the shoreline or the generator. Inverter-fed circuits are in a separate breaker box, on my unit this second set of breakers is below the wardrobe about 3 feet from my regular circuit breakers.

The refrigerator can use either its 110-volt heating element or propane to create heat to make cold (a whole other discussion on how absorption refrigeration works!). For the refrigerator to work on either source you do have to have the coach battery switch on. It requires 12-volts to operate its control circuits, even if the 110-volt heater is making it work.

All other systems run on 12-volts including the lighting, furnace, water pump, water heater control circuits, TV booster, etc. When generator or shoreline is supplying 110-volts, the unit's converter (different than the inverter) is converting 110-volts AC to 12-volts DC to run these devices and to charge the coach batteries. When no AC voltage is present, the coach batteries supply the 12-volts for those items.
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Old 03-25-2016, 08:14 PM   #36
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Yes, the clock went out. Good to know about the fridge not being on the inverter circuit.

I was worried my batteries might be bad, with the jacks having issues and all.

I will turn the propane back on to supply the fridge when travelling.

How to I tell if the inverter is on? How do I turn it off or on?
Inverter control panel with its on/off switch should be located where the generator control panel, tanks level indicators, awning switches, jack controls, etc.

Mine looks like this:
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Old 03-25-2016, 08:33 PM   #37
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Thank you so much for the explanations on how things work. I knew a couple bits of the info you said, but most of it was new to me. Well explained! Thank you for clarifying a lot of the confusion I had.

I will look at the inverter settings tomorrow. She is hooked back up to 50A shore power now, so all should be right with the world for the night.

Thanks again for clearing up much of my confusion!
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Old 03-28-2016, 05:57 AM   #38
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So, turns out, the inverter was indeed off. Found my switch where you said it would be.

After turning the fridge to Auto and getting the flame re-lit with propane, had no more issues with the fridge.

However, after the inverter was turned on, the microwave kept cycling power like every 5 seconds. I actually think the microwave may be faulty in this way only. I cycled the breaker for it. Inverter shows good voltage, batteries show good voltage when checked with a meter. Microwave works perfectly fine on the inverter for cooking. But if left idle (door closed, not in use) with the inverter on, it keeps cycling power. Just opening the door stops that. So we just unplugged it when the inverter was on to keep the beeping from driving us nuts. When we needed it, we plugged it back in and all went well.

On a separate note, we towed my trailer for the first time. Everything went quite well. I didnt have my trailer brake controller delivered yet, so I made the 20 mile trip using the engine exhaust brake religiously. Even without the brake controller, it towed amazing. Very impressed, happy and relieved!

Didn't make to any scales, but will look at that very soon.
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Old 03-28-2016, 07:22 AM   #39
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That is indeed strange with the microwave, never seen anyone complain about it exhibiting those particular signs or symptoms. Glad the towing went well too.

I've done a lot of mods to my Seneca, happy to pass along any tidbits I have learned!
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Old 03-28-2016, 07:30 AM   #40
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On a separate note, we towed my trailer for the first time. Everything went quite well. I didnt have my trailer brake controller delivered yet, so I made the 20 mile trip using the engine exhaust brake religiously. Even without the brake controller, it towed amazing. Very impressed, happy and relieved!
After I replied I remembered something else. According to other Seneca owners who tow trailers, we do have an electric brake controller pigtail under the dash making the controller installation that much easier.

I have had my dash apart numerous times for other mods, but never looked for the harness since I don't tow a trailer. But if you search the forum you may find a thread about it.
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