Error #59 ACIN1 relay test fault on firmware 1.27

Q&A and troubleshooting
, ,
1

I have a 3 phase Multi RS Solar A443 system, running stable on firmware 1.26. When i upgrade to firmware 1.27 one of the units throws Error #59 ACIN1 relay test fault while the other two operate without issues. When i downgrade to 1.26 the “faulty” unit operates normal again. Did something change in the ACIN1 relay tests in firmware 1.27? Is this a hardware malfunction or a firmware bug?

2

Hi @rhernaus

Engineers are looking into it now. Appears to just be a false alarm associated with this update.

But will confirm more

3

A quick fix has been released in an update v1.28

Multi_RS_48-6000-100-Solar_A442_v01.28.xup

Multi_RS_48-6000-100-Solar_A443_v01.28.xup

4

Wow amazing. I have installed v1.28 and can confirm the unit now operates without issues.

5

Hi Guy,

Thanks for the update.

I’m curious in version 1.28 what the “Single Phase” mode is for in System/System Configuration on a Multi RS Solar?

It appeared in that slot where I always dreamt of seeing the word “Parallel”.

Is this a prelude to something?

Screenshot_20260131_202040
Screenshot_20260131_2020401080×1260 116 KB

6

I had exactly the same problem with firmware 1.27. Since installing it, I always had the relay error. After updating to version 1.28, the error disappeared.
Thank you Guy