Hi, new member here. My V50 1.6 D2 started acting up just at 300,000 km. First, AC died which was solved with a new clutch coil. Two days later I got the red triangle and battery warning, and AC stopped working again. After restart the warning went away.
A few days later it came on again but it wouldn't go away this time and the alternator wasn't charging. Changing the alternator for a new one solved the charging issue - now it's 14,4V, but the warning is still there. It comes on about 15 seconds after I start the car.
Is there anything I can do do delete the warning?

 

I'd try checking for codes with an OBD reader (a Volvo-specific one if you can find it). There may be something else going on that you don't (yet) know about.

 

The scanner (not Volvo specific) says there is no communication with the alternator or something similar.

 

The actual code would be helpful...