Verified customer concern. Re set contactor/starter. 28 a draw and trips. Checked exhaust (fan) and found 1 phase missing. Traced and determined wire bad. Wire will need re pulled. Will require 2nd person. Advised GM of situation and that there is no way of knowing if additional problems exist until wire is ran. Advised cost will be approx $1000.00 to re wire. Will order parts and return later today and first thing tomorrow. Picked up material. Re ran branch circuit from contactor to exhaust. Re wired and tested. Removed old branch circuit. Verified rotation and amp draw. Unit working properly