Azel ilink SP86 pump controller led light not on - auto shut-off/down? It is suspected that this is the reason the radiant flooring water heater (Tagachi T-D2-IN-P 510 model) will not turn on. The condition occurred trying start the unit with only one zone open and that zone may have had air - after just changing the expansion tank. Auto-shutdown? Is there a way to reset/restart the ilink led/controller? Heater unit?