PDC spas Luxury Series Owner's Manual page 48

Operation Systems, Luxury Series | SmartTouch™ Control
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Clean the filter
May appear on a regular schedule, i.e. every 30 days.
Clean the filter media as instructed by the manufacturer. See Hold on page 19.
Test the GFCI (or RCD)
May appear on a regular schedule, i.e. every 30 days. The GFCI or RCD is an important safety device and must be tested on a
regular basis to verify its reliability. Every user and owner is to be trained to safely test the GFCI or RCD associated with the hot tub
installation. A GFCI or RCD will have a TEST and RESET button on it that allows a user to verify proper function.
Change the water
May appear on a regular schedule, i.e. every 90 days. Change the water in the spa on regular basis to maintain proper chemical
balance and sanitary conditions.