Tech returned to leak search Gas Pack #1. Six 20*20*1 filters were replaced yesterday. Chicken breaded filters are gone. Pressurized system up to 200 psi of nitrogen and trace gas on each circuit. Tech found no refrigerant leaks at indoor coil. Indoor TXV for circuit 1 has some oily residue, but tech confirmed no refrigerant leaks with ultrasonic or soap bubble. Tech found valve core for true suction port leaking. Tightened core, but it still leaked. Replaced core to stop leak. Tech found large refrigerant leak in oily spot at top right corner of micro channel condenser coil. See picture. Confirmed with ultrasonic detector. Need to call customer to quote condenser coil replacement. Due to coil size, at least two techs and a lift are required. 21.3 lbs of R410a and two larger size liquid line filter driers (DHY01470) are also needed. Left nitrogen in circuits. Staff has a bucket beneath fallen ceiling tile in tall ceiling in dining room. Looks like return duct had water dripping. Tec