Upon arrival performed a 3 system maintenance while checking on why system was dripping water into store. Checked all systems electrical and mechanical components, recommend replacing all belts. Found on unit 1 ckt 1 is flat on refrigerant (r-22), and condenser coil needs to be combed. Found on unit 2 ckt2 is flat on refrigerant (R-22) , unit 3 condenser coils need to be cleaned and combed. Unit 1 had a clogged p-trap for drain, was able to take apart and clean. Recommended performing leak search’s on RTU 1&2.