This 16" x 17" x 4" replacement circuit board operates with a Series 3.56 software chip and is designed for hot tubs equipped with a circulation pump. Replaced 600-167 circuit board on early models.

• J-LX & J-LXL series from 2011-2019
• Sundance 780 Series w/2 Pump From 2014-03/2017
  • Hamilton, Chelsee, Certa, Montclair w/Smart Logic
• Sundance Constance & Victoria with Smart Logic 2014-2019

Manufacturer Model: 6600-726

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