Hi,   Not sure where you got the info about FS4 & 5, but it is wrong - that is not a valid combination. If you meant FS3 & 4 “Test Mode” that is only available on the Floor and LT models.   For your entertainment here is the complete list of Reset/Test options for all the HX hardware from the website - https://helixhelp.com/   Helix Floor/LT Button Combination Description
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