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Goin by the image,
You have Dual Zone [system] activated, but Air-conditioning is turned off,
Press the Zone Button and it will change from "DZ" to "SZ" [Dual Zone to Single Zone]
Then press the Air Conditioner Button to turn the A/C on, select "SZ", then adjust the Temp accordingly,
If that doesn't work,
Reset the HVAC system,
If that doesn't work, as Fu Manchu mentioned above, there could be issue with one of your actuator's.
Have browse of this.
Chances are there is an actuator not working.
I think this is an easy job, some say otherwise. Set aside plenty of time so you can plod along without stressing.
https://www.autoinstruct.com.au/man...dore/replacing-air-conditioner-actuator-hvac/
Do you have dual zone climate control?
It is only just cropped out of the image.