You shouldn't go over 80% of the listed breaker capacity. For a 60 amp breaker you don't want to draw more than 48 amps.
If it says 30 on the outside panel then you should be OK. You read the FLA rating right?

Also make sure the total draw on the breaker doesn't include the inside fan unit. If it does then you have to add the fan rating to the total amp draw.

Always use FLA (Full Load Amp) rating.

Danny

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