YORK YK — Incorrect serial number

The panel shows Incorrect serial number while a private key is being installed for the control panel. This is the only wording the manual prints for the message.

The serial number that was used to create the key does not match the serial number entered in the panel — the key and the panel entry come from two different numbers. For context, access codes for the control panel are generated through YORK Chiller Access Manager, which the manual offers both as a web platform and as a mobile app.

• The incorrect serial number was entered in the panel, although the correct number was provided when the key was requested.

1. Check whether the Initialize Security button on the panel has disappeared; if it is still shown, continue with the next steps.
2. Compare the serial number entered in the panel with the serial number that was provided when the key was requested.
3. Correct the error by entering the matching serial number in the panel.
4. Repeat the required procedure.

No separate reset is described; the manual's remedy is procedural: If the Initialize Security button does not disappear, correct the error and repeat the required procedure. The condition is cleared once the panel carries the correct serial number and the procedure has been repeated.