The H-60 family helicopters are all alike in the bellmouth heat department. The bellmouth (the entire black thingy that lays against the fuselage and also rings the inlet) is heated by bleed air, as can be told by the rise in T4.5 when the bellmouth heat is selected on (about 45 degrees!).
This system works well as evidenced by millions of hours, but in a low powered descent, there isn't much bleed air, so the system can't guarantee complete anti-ice.
For this reason, the S92 came out with an electrically heated bellmouth, which is heated fully in all flight conditions, and is fully FAA approved.