Lots of good advice up there but a 13.5KBTU unit should not draw more than 14 amps running. UNLESS.
I have two A/Cs on this house one is 13.5KBTU the other 15KBTU (K=Kilo=1,000)
Both draw 13.5 running if clean.
Yesterday, I went, as the song is titled: Up On The Roof, and popped the cover off the 15K box, opened the inner cover and took about a whole buncy of "Lint" off the condenser coils.
What this (lint, dirt, crud, "Stuff") does is block the air flow, make the unit get hotter, this makes the compressor work harder and draw.... More current.
The two A/C's together, if clean, plus minimal other stuff inside (converter with full batteries, TV's OFF and their support electronics) draw 27 amps by measurement.,