Not for the first time recently, my system shut down and then restarted around midday.

Since the last time I have reported this, I have changed the heat pump settings so that it starts just before 12:00, and so (in theory) should not start up when COJ start load shedding.

So today's clues are
1) load shedding had started at 10:00
2) heat pump set to start just before 12:00
3) system trips just before 12:00
4) load shedding ended very soon after 12:00, possibly just before.
5) no other big loads running.

I was going to get into wonderings about the heat pump and the pool kicking in at the same time, but the pool isn't on the backed up side of the DB, so even if it did draw a lot for a moment whilst starting up, it wouldn't have pulled that current through the inverter and would not have contributed to an overload.

But it smells to me like an overload. But how to prove/disprove that? The system is busy shutting down, so it never gets to write an error message away. At least not one that I can see in PV Master.

Is there a way to access some sort of internal log to see what provoked the shut down? Or do I just have to live with a guess that every now and then the heat pump does make a big enough spike to shut the system down? I've now had two shutdowns, both about the time that the heat pump kicks in. Suspicious ne? 

NB! The inverter allows a 20A continuous draw, and short surges to 30A.

 

Edited November 3, 20223 yr by Bobster.
add amp limits

@Bobster.

There is a Group of inverter ALARM conditions that are recorded and stored and, In case of having Batteries connected by BMS, there is another group of ALARM/WARNING/ERROR conditions with reference to the Batteries.
The two previous groups remain in Goodwe's internal memory (I don't know how many records remain), whose history can be seen through the PV Master.
There is another error control (and certain ON/OFF states) which is the "diagnostic code". The PV Master shows you a decimal number that is equivalent to 4 bytes, which are encoded in its bits (0 to 31) "instantaneous conditions" of operation/warning that occur simultaneously at a given moment.
The problem with the PV Master and this Diagnostic Code, at least for Users who are not part of the Goodwe technical team, is that it shows a condition that even when you look at it, it is very likely that it has already changed and the unfortunate thing is that it is not stored in the memory of the Inverter and if this historical record exists, it is simply not displayed.

The other problem, for those who may be interested in knowing the operating conditions such as grid voltage, loads, inverter temperature, etc., etc. is that they are not shown to users either. Goodwe technical support can access these full logs, but at a one-minute polling rate. I believe this type of information that Goodwe support has access to is stored on their website. On one occasion they sent me a list with the indicated values (these were not errors, but operating data for a period of time).

The PV Master polling rate is too slow to capture certain instantaneous events.

Edited November 3, 20223 yr by Cef

Just to address one possibility raised by Cef: The battery did not shut down. It stayed up all the time.

33 minutes ago, Cef said:

The two previous groups remain in Goodwe's internal memory (I don't know how many records remain), whose history can be seen through the PV Master.

Thanks. Is this the information that PV master shows under the "Alarm" tab, or do I need to look elsewhere?

10 minutes ago, Bobster. said:

... PV master shows under the "Alarm" tab...?

That's right. The information of the first two groups that I mentioned in the post above is there and that you were lucky enough to be captured by your Goodwe.

Just now, Cef said:

That's right. The information of the first two groups that I mentioned in the post above is there and that you were lucky enough to be captured by your Goodwe.

It's not much help. I have a code 512 just after 10:00 - that's the grid going down as load shedding starts. Then I have a code zero at 11:57 with a description "error clearing". I assume this is the machine resetting as it restarts.

There are quite a few code zeroes in the log, but they mostly don't correspond to a shut down. If they did I wouldn't be thinking rude thoughts about the heat pump. Most of them are during times when I am likely to be awake (so even if I didn't notice the shutdown I'd hear appliances beeping as the power is restored) but don't align with the heat pump turning on.

29 minutes ago, Bobster. said:

There are quite a few code zeroes in the log...

The Individualized Events with "0" are exclusively related to the first Group and as I told you in another post of another thread that you opened, they correspond to information of Return to the Normal condition (elimination of errors)

I have also noticed slight differences with the inverter firmware update and different versions of the PV master app.

Edited November 3, 20223 yr by Cef