Apparently B14B2 is a lost of communications between the AC control assembly and the ACc amplifier assembly on the LIN bus. The check is to see if you have 12 volts at the AC control assembly with ignition on and less than 1 volt with the ignition off.
See the link I got from Googling, ...

http://zatonevkredit.ru/repair_manuals/raw_content/RM100000000ZL8A.xml

Note: If you took off the connector then the pins may be bent or not mating correctly??

 

i will see

 

You wrote you were working on the interior and had the dashboard out. Maybe it is just a forgotten harness connection when you did reassemble the dashboard. Looks like the unit lacks input from a sensor or similar.

Pls let us know about the issue once solved.

Best Gerald