Hello, and welcome to the forum!!
That is a very specific question, one that only folks familiar with the OnCommand system and your Spa Heater will be able to answer. I don't know if there is anybody here who can answer it, but just be patient and check back.
In the meantime, you can use the google link in my sig to search the forum to see if anybody else has posted about them. You'll have to log out to do so until your registration is complete, but you still will be able to see anything on the forum or in the archives that might be relevant.
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