I had the opportunity yesterday to see a SQ D QO panel that had a burnt 60/60 breaker and melted tabs. This breaker is for the A/C condensor. The manufacture data plate on the condensor calls for a min. of 37.9 and a max. of 60 amp fuse. Also is calls for a max breaker of 60 amps HACR rated. The tech who installed the new condensor (I say new because of its condition) changed the fuses to 60's. The breaker remained a 60. It is my understanding that this is not in compliance to art. 440.12 & 440.22. I understand the fuses are there to protect not just the equipment and wiring but also the breaker in the panel from any potential damage. Am I wrong on this? Also becuase the breaker is not listed for HACR (this is an older SQ QO breaker) this is also a violation. Am I correct?