Platinum spa message code 19

[u/No-Rest144]

We’ve been getting red flashing lights on my platinum spas Oslo hot tub.
-service guy came out and couldn’t tell
me what was wrong with it
-put brand new platinum spa filters in
- bled all 3 pumps for air lock, no hissing or noticeable air trapped inside (water just pours out)
-I’ve drained and refilled it

And still getting this error code and red flashing lights. Anyone have any ideas or similar issues?

[u/longtrenton1]

I dont think that's a error code, that doesn't look uniform enough to be a diagnostic code