Intermittent error 26 on startup

Sovol SV08
1

Most times I start my SV08 I get an error 26. If I wait a few minutes sometimes a firmware restart will work and sometimes another 26.

Before the error I can see the bed temp on the screen and it’s a normal temperature.

Early on it was related to not finding the default bed mesh. I removed the delayed load and it worked for a day. I found this in the klipper log.

Now I get an MCU ‘mcu’ shutdown: ADC out of range.

This doesn’t seem to be related to the bed thermistor, is there anything else it can be?

2

It’s still a thermistor issue…which one, I can’t tell you.
But, since you had the bed issue before, I would start there.
Check the connections, look for a broken, loose or crimped wires.

3

When this happened I installed the R3men bed I had received. While it is possible the thermistor is bad on both it doesn’t seem likely. Could this be a main board failure?

4

Can you zip up your klippy.log and upload it?

5

I wouldn’t think it be the board as they usually just go out, it wouldn’t be intermittent.

Did you change this setting for your new bed..??

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6

Yes that matches my config other than the pin numbers. I tried a thermistor pin on my klipper expander but it had the same results.

I have some new thermistors I could try, they aren’t for a bed but worth a try

7

I may have solved the issue. I had set the MCU fan to temperature control thinking that min temp was the temp it would come on at. It wasn’t 35c in a room in the 20s.

Not willing to completely say this is solved but hopeful.

And I know it’s my own fault but if klipper had just said which temp was out of range it would have saved a ton of anguish

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8

@Lion I wanted to that you personally for weighing in to help me figure this out. Thanks!

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