You installed new 240Volt T104 Intermatic timer.
Cause of problem is not determined, so read information below and then add a comment with further observations.
According to question:
Timer is wired correctly.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.htmlThe on-and-off trippers are installed on dial, but do NOT click the override lever back and forth.
Both ON and OFF trippers are on the dial.
And the timer is NEW and not used, and trippers are NEW and not used.
And the dial rotates and keeps good time, making 1 full rotation each 24 hours.
And the manual override lever works and turns load (pool pump) on-and-off.
Open following link to view photo image of OFF tripper coming in contact with manual override lever.
Trippers are soft metal, and made to wear down. When tripper gets old, it will slide over the lever instead of move the lever.
http://waterheatertimer.org/images/WH-lever-005-500.jpgOpen following link to read how to set timer, and see close-up images of timer with trippers on dial, and tripper order number for replacement trippers.
http://waterheatertimer.org/pdf/How-to-operate-and-set-T104-timer.pdfTake a moment and rate answer:
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