Magnum MS2812 Fault Code Messages

44A DC is ~400 watts AC, that's not a whole lot.

I'm going by my manual for the 3012 but I would think it's similar except for the hybrid features.



I think because it dropped below the LBCO for more than one minute.

But doesn't explain why it dropped so low if your batteries are actually good.

Itinerant1 wrote:
I'm going by my manual for the 3012 but I would think it's similar except for the hybrid features.



I think because it dropped below the LBCO for more than one minute.

But doesn't explain why it dropped so low if your batteries are actually good.

Again, thanks! And yeah. I keep telling myself that 8.5V is a reading that I just could not see ~90 mins later a 12.3 - 12.4V reading - without any charging going into the battery bank. Really makes me think it may be a 'calculated' voltage value?

Going to see what happens tonight, with the Samsung Ice Maker OFF again.

Either way, I'll call Magnum on Monday to ask their interpretation of the error codes.

Best,
Smitty

Does the Samsung have a defrost timer / mode that can be turned off, or might turn itself back on automatically?

I just read the Samsung manual. No mention of Defrost Timer or Mode that I noted.

That being said, the Samsung has been in the coach for about three years, and have never had the Magnum Inverter shut down overnight. So other then I had not noticed that the Ice Maker Off had been cancelled, nothing else has changed.

See what happens tonight:)!

Thanks again,
Smitty

I checked the Magnum status a few times during the night. Consistently lower power usage 10-12A vs with the Ice Maker ON, at times I was 14-17A readings before then. (Of which some was the idle and parasitic usage of the cumulation of items. So not all Samsung.)

SOC was at dropped down at lower amounts too. Still at 90% at 1:45AM. Voltage went from 12.81V to 12.5V at 1:45AM to 12.3V at 3:30AM.

Got up at 5:45AM. AH draw was 16.8 - 17.4. SOC at 85%. Voltage was 11.3V. And as I watched, it dropped to by .1 to .2V over a 4 min period to 10.3V! I checked, and BMK indicated the same 17.0 - 17.4AH draw.

So by luck, I timed it when the Magnum/BMK was recording the seemingly cascade dropping of Voltage. SOC being calculated by AH OUT vs 800AH house bank setting, remained at 85% SOC.

Went out and measured at the batteries. Multi Meter reading of 10.29 - 10.31V, over a 30 second period. Measured individual batteries, and it returned the answer I hoped not to see. 6.15V / 5.91V / 4.5V / 4.14V. So it looks as a bank, two of the batteries were carrying the 12 volt duties for the other two. The battery Load Test I mentioned performed earlier, was for the full bank, and again suspect it tested good due the two batteries carrying the load for the other two weak batteries.

I'm going to loosen all of the cable connections to confirm clean contact. But suspect they're all going to be OK.

We move to 50A Shore on Monday, and I'll get them up to full charge via the BMK Meter, repeat the readings on all four individual batteries, then run them thru Conditioning. Then I'll turn off Shore Power and go thru another night of monitoring, and see how things test out. If the two weak batteries are still problematic. I'll bypass them for the balance of the trip and run on 400AH bank vs 800AH bank. And budget our boon docking usage accordingly. Figure shutting off the Inverter for several hours over night, will not cause any damage to the food in the Samsung, which would then be a shiny stainless steel 'ice chest':)!

I've read on other forum threads, how resilient (And sure, also at times puzzling and frustrating.) the Magnum MSxxxx series seem to be.

I still am confused on why LBCO did not cut out at 10.2V? As I saw the 8.5V registered on the Fault Error Log.

I'm also surprised the two Lifeline L16's seem to be in distress at age 5 years. They've had maybe three times in they life, when they were drawn down below 50% SOC - that I know of. I say that I know of, as I've had to leave it in shops for modifications for up to two weeks at a time. Yes, they're asked and supposed to keep it on shore power at that time - but who knows if they did this consistently.

Sorry for the long thread, on what appears to be two out of four, with a third not too bar behind, batteries going bad:)! I'll wait to see if confining terminal contacts are solid, as well as Conditioning, to see what needs to be done next...

Best to all, and thanks again for the input and suggestions,
Smitty