GREEN - flashes every time a pulse is sent to the coils

RED – brief flash at the end of each mode, but if RED flashes many times or stays ON, that means device fault. Try this: make sure coils are plugged in correctly and fully, test coils with hexagonal tester, turn power OFF and allow to cool.

YELLOW – flashes only during REST periods (available in selected protocols). No pulses are sent to the coils when flashing.