Onzen Setting for Core Arctic Spas

The Onzen settings for your Core Series Arctic Spa with 4 button topside control

We recommend the following settings and adjusting duration up/down by 1 based on your chlorine reading:  

oS (Onzen Start Time) 12 

 od (Onzen Duration) 2 

 oF (Onzen Frequency) 4 

 To test if your Onzen cell is working, set od to 6 and oF to 4 and see if the cell bubbles. If it does, the cell is working. If your Chlorine does not raise after 24 hours, you may need to do a very heavy shock of your water or your cell may need replacement if it is over 6 months old.



To get to the program menu, hold down the light button for 5 seconds. 

 The setting will allow you to set the clock, change filtration cycles and set the Onzen salt system and other options. 

  • Press the light button for 5 seconds to get you to setting 
  • Then press the light button 2 more time to get pass the clock and filtration setting 
  • You should then see  ‘oS” followed by a two-digit number that indicates the hour start time
  • To change the start time press the “up/Down” button we recommend 12 [oS 12]
  • Then press the light button to move on to Onzen Duration OD  and change the duration (how long the Onzen will run for ) we recommend 2 [OD 2] 
  • Press the light button again to get to Frequency oF (how many times it will run a day) We recommend  4 [oF 4] 

You can follow the directions on this video: