My red led does no longer come on, on my 5 Kw MUST inverter
BertKu
Registered Users Posts: 3 ✭
For 2 months the 5kw Must inverter, performed a fantastic job, until I needed to shut the system down to make menu changes, and when I removed the terminal of the 48 Volt batteries, it gave an enormous bang when i placed it later back. I have not been able to figure out why. With my old 2 Kva inverter, it was because the electrolytic capacitors were charged up in a very short time, but it never damage the 2 Kva inverter. Anybody who can help me out what the reason is the the 230 Volt site is no longer working.
Comments
-
No chance that the + and - battery bus terminal polarity was reversed when connected to the inverter?
Double check the inverter's input fuses... Some inverters are "polarity protected" by blowing the input fuse(s) if +/- connections are reversed.
Good luck,
-BillNear San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset -
BB. said:No chance that the + and - battery bus terminal polarity was reversed when connected to the inverter?
Double check the inverter's input fuses... Some inverters are "polarity protected" by blowing the input fuse(s) if +/- connections are reversed.
Good luck,
-Bill -
Good day Bert,
I really do not have anything more I can add... There is the old erase the settings and reprogram. And before attaching the final DC lead, can use a low value resistor to "pre-charge" the input capacitors (high surge current is not good for capacitors--But not many mfg. seem to do anything about it).
Keep battery cables short... And +/- cables together (even twisted). This lowers the inductance and can help reduce over voltage on the DC bus. High current surge (spark) can + inductance could damage the DC Front End of the inverter (at least in theory). But this will not "fix" your current box.
-Bill
Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset -
BB. said:Good day Bert,
I really do not have anything more I can add... There is the old erase the settings and reprogram. And before attaching the final DC lead, can use a low value resistor to "pre-charge" the input capacitors (high surge current is not good for capacitors--But not many mfg. seem to do anything about it).
Keep battery cables short... And +/- cables together (even twisted). This lowers the inductance and can help reduce over voltage on the DC bus. High current surge (spark) can + inductance could damage the DC Front End of the inverter (at least in theory). But this will not "fix" your current box.
-Bill
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