@rraustad, thank you very much for the reply.

Yes now the unconditioned zones are working fine.

But, I want to mention one observation here.

This outdoor air specification for ventilation doesn't work for unconditioned zones.

When, I changed to infiltration to 5 ACH, it worked, as in image below:

C:\fakepath\2.png

Could someone explain this?

Regards, Smruti