ok hi there i viewed the specs for this freezer
this unit must be plugged into a 120v outlet with a 15amp circuit breaker dedicated (nothing else should on this circuit) so all by itself. you have to check the voltage outlet where you plug in. you must have at least 115v or better (125v the most) if you have less then 115v it will cause damage. ok you went and checked all this out and everything is 15amp with 115v or better and it still trips breaker.
ok the running amps is 6.8 amps so to blow the circuit you need 15 amp which is too high.
i suggest you call a refrigeration guy because he will be able to determine if the problem is the compressor (which has a 4 year warranty with truemfg.com only in the USA) or something else. Usually but not 100% what would make a freezer like yours to blow the fuse is the compressor. if it overheats it will do this, if there is a sudden high pressure within the system it will do it, if you have a condenser fan that is not running at proper speed it will do this...
the problem cannot be pin pointed understand please... you have to babysit it, watch for changes in the refrigeration system and the running compressor amps, voltage drops ( this will cause high amps) etc...
Refrigeration is not easy and alot of tech stay away... so those who stick it out make money cause you have 2 choices: buy another one and pay big bucks to get it fixed. at least see if you can find someone to come over (for like $40 - $60) and tell you exactly whats wrong with it... whew... hope this was helpful and not confusing...sorry