huffypuff

Do you have your owner manual? If so see if the instruction is in there and ignore other instruction.

I do have a couple of fans running that is in the bathroom is automatic and in the galley on low. I also have a couple of windows cracked open to let the air flow in. Otherwise in warm sunny weather it will get to be over a 100 F inside. The inverter charge has a couple of built in fans in it. The coach was built with a vent on the front wall of the compartment and a automatic fan on the back wall. The inverter charger monitors two internal and batteries temperature in a separate compartment. I didn't upgrade to a true sine wave unit because very rarely I use the inverter and only did so once or twice when the generator wasn't working. The microwave worked fine on the inverter then so not worried. I otherwise start the generator when using the microwave.

I got the replacement inverter charger yesterday and install it last night. It went to bulk charging and was like that when I went to bed. This morning it was on float charging and tonight batteries are fully charged and charger is on standby. I have a couple of fans running all the time for the hot weather. These are the 120 volt in and out connection. No big deal to pull these out and install in the new one. This is the old inverter, soon I will remove the cover a see where it let the smoke out. This is the new inverter installed. Still need a couple of minor touches and surrounding area cleanup. This is the reading from the remote tonight stating fully charged battery and charger is resting, charge light is blinking as if on standby.

My previous issue turned out that I already renew with the expired credit card and it went thru. 😲 Now the expired card is deleted and signed up for five years. When it becomes time to renew the new card will be expired. Good planning.

On the last page there is a continuous duty solenoid and I mention to him to check power and ground to it to engage that solenoid. It could be getting 12 volts from the alternator while engine is running. The inverter/charger job is to charge the house batteries while on shore power or running the generator. He needs to check why the solenoid is not switching on before searching for a part that might not be on his coach. It should be in the battery compartment and you only need a test light to check it.

I'm sorry but the relay I'm talking about is actually a solenoid properly near the batteries. Check why that is not working.

Find the relay and check 12 volt power and ground to i with engine running. If you have 12 volts and good ground, then bad relay. If not race the wire to its source.

The switch box on mine is in the overhead cabinet with the dvd player and surround sound system front of the driver seat. .

On my HR that is outside tv signal and must be selected correct at the switch box. On the other side is the telephone, cable input and remote satellite hook up.

That inverter has two 120 volt input and two output. It supplies inverted 120 power to certain receptacle like TV, microwave and some outlets. If the microwave didn't work from the inverter the entire leg would be out. Please look on page 23 of this manual. If wired single leg in and out then the microwave would be separate depending on fuse panel. https://www.magnum-dimensions.com/sites/default/files/MagArchive/64-0002-rev.-2-9-03-ME-Series.pdf

Sounds like it's about ready to let the smoke out. You need to find the loose connection before it does.

Hindsight is always 20 20 and quite a few people must of been under there and saw it but thought nothing about it in the last 45 years. I know many places had service my coach and never noticed the positive cable rubbing the back wall when the battery tray is shoved in. Yes I put a piece of heater hose around that cable. I prevented one problem but as luck is for me will have another problem will pop up without leaving my driveway.

Are you on shore power? Does it do the same running the generator?

The intellitec load management may shut a few items down if it sense less than 50 amp input power. I seen it in action when running a/c and running microwave plugged into 30 amps. It uses relays in the main 120 volt circuit box.

Your bus is a 1974 and 45 years old so I think it's out of warranty and the factory would consider it normal wear and tear for two items that happens to touch. Sorry to hear about your breakdown. I came close to same with a sudden fuel leak about 5 year ago. The high pressure line on engine was recalled and not performed.

I did and all cells came up and reinstalled them and had 13.2 volts all together at 98 percent. Plugged back into shore power and as soon as the charger kicks on, DC overload. The FET has got to be bad and just that cost more the haft the cost of the unit. No sense putting that much funds into a 13 year old unit only to have something else go wrong. I order a replacement unit from iMarine USA. Hopefully it won't take too long to get it.

I just got a call this morning and they claim that all batteries came up to full charge. I will pick them up later today and hook them up and see if the results are the same.

Charging all day at the store and still not charged, 1.2 reading now. I think theses batteries are ruin from going dead thanks to the failed charger.

If you are at a show and have the monitor or one sensor with you they will supply you with free replacement batteries.

UPDATE: Got a call from Batteries + Bulbs and they started the charging process this morning and expect to call me later today with the result. He also told me that the batteries were pretty much bulletproof and never had a bad one go out or come in.

I charged the batteries for 2 days slowly and had 12.5 volts before plugging shore power back in and resetting the unit. Still got DC overload right away so I remove the batteries and took them back to Batteries + Bulbs as the electrolytes tested only 1.1. They are required to fully charge and test the batteries before replacing or returning them too me. The coach sits in my driveway on a rv pad and is plugged in to shore power and I haven't stepped inside for a month. My DW was inside three week ago and saw the red light on the panel but forgot to tell me. Since then the batteries was run down completely because the charger failed. I know the charger is sensitive as I had to replace the temperature probe after I returned this winter. That issue was solved.

Magnum Energy ME2012

With the problem I'm having looks like the control board or the fet or both is bad. I can get a new one shipped to me for less than what it would cost to replace those parts. Don't make sense on 13 years old unit.

Seems like the charger on the inverter took a crap. I went into the coach on Sunday and saw a red light on the remote panel and a fault readout of DC overload. I also seen the voltage of the batteries of only 2 volts. I slowly charge the batteries with a portable charger over a days and didn't do much so I brought the 80 amp shop charger put on overnight. I charge them at 40 amps and overnight a 10 amps but still less than 90% charged. I tried the inverter charger and as soons as the charger kicks on I get the DC overload fault. I check the electrolytes in each cell of the batteries is only 1.1. Since I only brought the batteries last December I took them back to Batteries + Bulbs for them to evaluate. The check in voltage was 6.25 each. They going to run them through a series of test after charging overnight and call me tomorrow. Otherwise looks like I will be looking for a new inverter charger as the DC overload fault appears to be a fatal FET board.

Awhile back I had a bad parking brake release valve.