Magnum MS2812 Fault Code Messages

[Smitty77]

First Boon Docking of this trip. Woke up to a Red Light Fault on the Magnum remote panel.

Message read:

Low Battery
DC 12.3V - 0A

I shrewdly deduced my Magnum stopped inverting for some reason, and went into Fault mode.

Drill into the Fault Code History to see
H1 D- 0 05:24A
H1 Inverting
H1 8.5V - 44A
H1 BTS: 59F
H1 Tfmer: 100F
H1 FETs: 82F

Checking BMK Meter I saw 85% SOC, & 12.3 to 12.4V

Going to my MidNite Classic 150 Controller I saw 83% 12.4V

I double checked that the Magnum LBCO was set to 10.2V

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Help me understand the Error Codes.

H1 D- 0 05:24A What is D-? What is the 0? Assume this took place at 05:24AM(?).
H1 Invertering Assume error took place on the Inverting side(?).
H1 8.5V - 44A Did the Magnum detect a 8.5V level of charge? 44A (Amp I assume?).
H1 BTS 59F Battery Temp Sensor read 59F.
H1 Tfrmer: 100F Trans Former 100F temp reading
H1 FETs: 82F FET board temp reading 82F

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More info:

-We started the evening at about 7:00PM with both Magnum and MidNite indicating 100% SOC.

-We leave our Inverter on 7/24, even when parked and in storage on 20A outlet. (We keep the Samsung RF18 on 7/24 too.).

-I had a similar occurrence, 6-7 months ago while again Boon Docking, with similar readings mostly slight different temperatures.

-Had our X's 4 Lifelines L16's load tested, as a set (They did not disconnect and test each battery independently.). And the test came back solid.

-We had been off Shore Power Inverting all day, with the MidNite via 1200W of Solar maintaining back and forth between Float and Resting up until we started using the oven, we did run the generator for that 30 mins of oven usage.

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Do I have a board going bad on the Magnum?

Could I have a bad cell in one of the four batteries? But with an indicated 12.3 -12.4V reading under load between the Magnum and MidNite - how would the Magnum detect a bad cell? Is that what the 8.5V - 44A is trying to communicate to me? That for a brief time it detected a full battery bank reading of 8.5V?

Tonight we'll start up again at 100% SOC, and see if it repeats in going into Fault code.

Weekend of course, but will also network with Magnum for input on Monday.

Appreciate any suggestions, best to all,
Smitty

[Smitty77]

Sorry, I stopped in the middle of my post, to go reset the Hydro Hot form Low Voltage so we could heat up the coach:)!

I wanted to make sure I understood the LBCO relationship to the Inverter shutting down.

Here is what Magnum Manual says:

Figure 5-16, Low Battery Fault
• Low Battery – The inverter has turned off to help prevent the batteries from being over-discharged. This message is displayed and the FAULT (red) LED illuminates when the battery voltage drops below the Setup 02B LBCO setting for more than 1 minute. The inverter will automatically restart and resume operation when the battery voltage rises to ?11.0 VDC (12-volt models), ?25.0 VDC (24-volt models), or ?50.0 VDC (48-volt models).
5.0 Operation
Low Battery
Settings /Info...
Remedy: This fault will also automatically restart if AC power such as utility power or a generator is connected to the inverter/charger’s input and battery charging begins.

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Every indication I see, is that batteries were in the 12.3-12.4V range. Suppose the bank may have gone down below the LBCO value of 10.2V, and then after the Inverter shut down they rested back up to the 12.3-12.4V readings indicated.

That again makes me want to understand the H1 8.5V - 44A error code reading?

Thanks again. Just wanted to share that I had researched the Magnum Manual on Low Battery:)!

Smitty

[2oldman]

How old are the batteries?