York YK Style H Operation Manual page 23

Scan the QR code on the chiller Login screen or enter the unit serial number.
3.
Figure 16: Scanning QR code
On the Chiller Details screen, tap Generate Access Code.
4.
Figure 17: Chiller details
5. Select a start date if not today's date and tap Generate Access Code.
Figure 18: Generating access code
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center 23