[RE-wrenches] Magnum: meter won't reset; Internal Bridge error

[boB]

mick abraham wrote:
> Greetings, all~
>
> If there is no Magnum employee monitoring the Wrench List, could boB Gudgel 
> forward this as appropriate?
>
> My client has a "genset plus" system--no recharge other than his MagnaSine
> 4448AE driven by a generator. Batteries are a single string of Deka 8L-16's, a
> few months old. We're running the charger defaults: 48 amp maximum charge
> rate, 2 hour absorption, and flooded setpoints.
>
> (1) Magnum's integrated battery monitor hasn't done a 100% reset for some
> time. It counts up to 99%, no more, according to the report from my customer.
> I asked the customer to run the generator for longer than his normal pattern,
> in order to force the meter to reset (and also to increase battery SOC). The
> "AH I/O" counter ran up to about 78 amp hours above zero and the
> inverter/charger went into float for over an hour...but still we got no reset
> on the counters. 
>
> Is this an equipment glitch? OR: should we fool the system into repeating the
> bulk charge to try again for the reset? 
>
> (2) The client reports an "Internal Bridge" fault. This has happened multiple
> times because the customer has become adept at resetting the unit per page 36
> of the manual. The manual says nothing about "internal bridge", but repeated
> shutdowns seem non-normal to me. I do notice something in the manual about the
> "FET Bridge" so maybe that's where the trouble is. 
>
> The customer has been pounding their batteries by driving the inverter until
> it shuts down due to low battery voltage. Could that trigger the "Internal
> Bridge" fault? It certainly triggers my cringe reflex...
>
> If we can get the percentage meter back on track, that might help reduce the
> customer's "drive until it dies" behavior. Here's hoping...
>
> Thankx,
>
> Mick Abraham, Proprietor
> www.abrahamsolar.com
> Voice: 970-731-4675
>   

No problem, Mark.   Your info is being forwarded to the Magnum 
Engineering department now and I will follow up
on this when I get in tomorrow morning.  The 99% (BMK) issue is familiar 
but I can't remember off hand exactly what the
solution is.  I believe  the internal bridge fault (inverter), was on 
earlier units and has a software fix  as I remember.
You should get more info hopefully tomorrow.

Thanks,
boB