Ruud Not Working

It was running all the time so we installed a new thermostat and it blew a breaker and wouldn't come on. So we put the old thermostat back on and it still won't come on.
Ruud achiever 10 high efficiency heat pump
Model # upka-030jas
Mfd 09/93
Serial # 4919 m3593 0689 outdoor use
Volts 208/230 phase1. Hertz 60
Compressor rla 14 7/14 7. L r a 82
Outdoor fan motor. Fla 9
Hp 1/6
Min supply circuit ampacity. 20/20 amp
Max fuse. 30/30 amp
Min fuse 25/25 amp
Design press high. 300 psig
Design press low. 150 psig
Outdoor unit factory charge. 77 oz