HACR involves the ability to handle short term overloads. I am guessing the HACR breaker is still within the cook off range when the non-HACR main trips.
When the heat pump can't keep up, they usually just put toaster wire heaters in the air handler. The compressor itself is probably 30a FLA or less but the toaster wire can easily be 15KVA (over 60a) and maybe even more than that up in the frozen north.
If he is seeing 130a, I would agree that compressor is doing something dreadfully wrong. Put the clamp right on the condenser disco to see what that says. Is that a breaker or just a switch/pullout? If they are trying to protect the condenser with the air handler breaker that also handles the heat strips, it is a 110.3(B) violation.
(the label on the condenser)
