Found unit low on charge again. perform leak check on system. found a leak coming from the condenser coil. had to take apart unit and cut some of the fins to get to the leaking area of the coil. had to evacuate system and braze the bad area of the coil. the pump system down and recharge with 10 Lbs of R-22 Cycled system all operation are ok at this time. while there the 2nd cooling unit keep shutting down look at that unit and found it to have a weak capacitor. replaced capacitor cycled system all operation are ok at this time.