The BUB message indicates that the Bubble/Jet Massage function has been activated. 

A green indicator light will turn on and no action is required.

NOTE: The Jet Massage function cannot be activated at the same time as the Filtration system.

The Jet Massage system will stop automatically after 15-30 minutes of operation. Reactivate the jets by pressing the Blower button again. If the jets do not reactivate immediately, this may be due to a possible overheat. 

Give the unit time to cool down (at least 15 minutes) and try again!

If you require any further assistance, please contact Customer Service.