question

jarko avatar image
jarko asked

reason for RS mppt display flashing systematic, no error codes

Hello,

Less than one year used RS mppt 450/200 display flashes fast 8times and then keep break, and again.

This start again today when light rise outside. This will reset if i keep system down long.

Only abnormal other thing is error in cerbo display 'battery high voltage' - 641,22V.

System work fine.

Thinking, can it be from parallel multiplus II 230V 48/5000 feeding same 48V busbars .. those are not same hardware versions. old is 07, new don't know. new have stamp 'UK CA'. Both are buy 2020/2021.

Fw. is 494 in both.

Multiplus parallel adaptation is solved by using 0,1ohm resistors on both side multi in live wire.

So 4pcs resistors. same length wiring 2,5mm2 inlet and 6mm2 outlet, amp meters and circuit breakers. Still not too great balance, but system is more stable.

Or can it be on mppt side?

Mppt have fw. 1.10. Cell voltage stays way below 400V allways (8pcs pylontech .. float 51V).

Is something going broken in mppt / what is reason about flashing ? Err 201?

Thank's.

Multiplus-IImppt rs
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1 Answer
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jarko answered ·

Anybody on-line? Victron people?

Is that backlight flashing mechanism buil-in to Rs mppt 450/200 charger?

I understand that if flashing would be random, then it can told some failure.

But now it is allways eight flash. Then it keep break. And start flash again - eight time. And so on.

I open controller, and 1Mohm resistors look good. All look good.

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