Defrost Control; Cold Air Prevention Control - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

SiBE26-701

1.1.12 Defrost Control

If heating operation is continued in low outdoor air temperatures, frost forms on the surface of
the outdoor heat exchanger, resulting in a decrease in heating performance. Accordingly, when
frost formation reaches a certain level, it automatically switches to cooling cycle for defrosting.
When the frost completely melts, normal heating operation resumes.

1.1.13 Cold Air Prevention Control

In order to prevent cold air from blowing toward customers when the indoor heat exchanger
temperature is low; for example, at the time of heating startup and after defrosting, this function
selects air volume LL tap and fixes airflow to horizontal direction.
Function and Operation
Indoor Unit
53