MultiRS Alarm: #54 LOW AC OUT voltage / HIGH AC output voltage: Alarms

In my ESS configuration (3xMPii5000/Pylontech 52 kWh) also a MultiRS 6000 SOLAR is configured for 2x SOLAR MPPT and genset input.

When testing the genset an error Alarm #54 has occurred which cannot be resetted.

Has anyone seen this error situation and resolved?

The error message on display MultiRS reads:

Alarm: #54 LOW AC OUT voltage,

on CERBO and VRM the error message is :

Inverter/Charger - RS 48/6000/100 HQ2512E7WQG High AC output voltage alarm: Alarm

Question 1: is the error too HIGH or too LOW AC out voltage?

I have stopped the generator, no AC IN, no AC OUT but alarm cannot be resetted!

Information in The MULTI RS manual doesnot lead to a solution:

Error 54 - Inverter output voltage:
If the battery voltage is getting low and a large load is applied to the AC output the inverter is unable to maintain the proper output
voltage. Re-charge the battery or reduce the AC loads to continue operation.
If the error immediately pops up when switching on the inverter (without load) on a full battery the cause is most likely a broken
replaceable internal fuse. Contact your Victron dealer for support
.

Internal fuse seems ok, as I have seen AC on AC output!

As advised I have updated the FW to the latest version 1.28 and have also performed an factory reset.

BUT: problem is still present! Any suggestions are welcome!

Hans

So what was the battery voltage vs the load on the output and AC voltage on the output at the time of the error

The values shown in the MultiRS widget.

Weird frequency shift there.

How is the MultiRS working in the 3 phase MP2 system electrically?

So its logging 11v (source widget above) on the output you are testing with a meter and it is there?

For this try do a factory reset see if that does not clear it.
Test it separately to the systemmon a full battery. I know you did try the reset and formware. Try is again and rollback firmware.

I think if the fuses are ok then you are at the PRE RMA point.

Hi LX, thanks for your advise.

Configuration: The single MultiRS is connected to the same LYNX busbar as the 3 MPii and Pylontech batteries.

The 3 phase MPii are connected to GRID and in series connected to power the house. MultiRS has 2x MPPT PV to charge battery . I have a emergency genset on AC-IN and no (permanent) load on AC-OUT.

As the problem occured testing a Chinese Genset I suspect the power/freq output of genset might generate the problem (hence the high freq spike?). I will test again with a different generator. However I find it very strange that when the fault is cleared (no AC power) the error condition cannot be reset via CERBO menu or Victron Connect. Error #54 HIGH or LOW keeps returning!

I have, at end of day, completely switched off MultiRS and rebooted then finally the errror #54 disappeared.

For this behaviour a pre RMA support call will be made if test with other genset also fails.

The behaviour occured both with FW v1.25 aswell with v1.28 now.

Thanks for the pre RMA link!

regards Hans