k.ewin said:
- Yesterday I did an upgrade to 3.11. I had 3.11b2 running before without problems.
- After upgrading (and some "hardware work" such as shrink wrapping some connectors) I did a test ride and everything went smoothly
- Today I connected the batteries and the CA booted to an error message: "SLOW PWR UP". Even disconnecting and restarting did not help.
When at the "SLOW PWR UP" message I can use the CA buttons to browse through the settings and they seem to be correct. Things like the break switch indicator are working well, but booting to the main screen does not work any more. It always stops at "SLOW PRW UP".
What does this message mean?
I don't know if it's important, but my CA is one of those with the boot issue.
The
"Slo Pwr Up" message was instituted as an indicator that the battery voltage has been applied but has not risen above the
Shutdown voltage. This can happen with precharge switches or when pedaling with the main power disconnected (e.g. on a stand) where regen 'sort of' powers things up. This was a source of memory corruption that was addressed last year and the message is a way of indicating that things are starting up but the voltage isn't there yet. When the voltage rises above the
Shutdown voltage the CA finishes the startup sequence and becomes active.
Since you are seeing this all the time instead of as a transient screen, I would guess that your voltage calibration has somehow become corrupted. This would cause the CA to think the voltage is other than it is (too low in your case) so it will be misled and never complete the power up sequence. It may be that other calibration settings are NG as well.
Reset Calibration to Defaults
The fastest means to remedy this is to upgrade the firmware again but
select both checkboxes so a new default calibration will be put in place. This will differ from your particular device-specific calibration by a few percent but will work okay. This is should get things going.
Restore Device-specific Calibration
Optionally, you can then restore you original per-device calibration from an old setup file
that you have read from your CA. Load up that setup file and enable
Preferences/'Show Protected Settings'. The calibration settings will appear in the Calibration category. Read your CA into a different tab (I like to use a whole different Setup Utility), and manually copy over the old calibration settings into the present CA settings. Check the boxes for the protected settings and write the settings back to the CA.
It's unclear that any of the other things in play with your original re-flash could have caused this, so I will cut a ticket to look into this possible corruption issue.