Completed a/c maintenance on 4 central a/c systems. Dye was found on both air handler that serves the 2nd and 3rd fl located in 3rd fl attic as well as the unit in the master bedroom kneewall. The primary pan for the master bedroom unit was also found cracked there was water in the emergency pan underneath the unit. The water from the pan was removed and drain line was flushed out. Going to need schedule project manager to quote replacements on both of these units. Chemically cleaned all evaporator coil’s. Inspected blower compartment and primary drain pan. Treated and cleared all drain lines,traps and tested all condensate pumps. Brushed and cleaned all electrical cabinets and tighten and secured all electrical connections on both inside and outdoor units. Tested all safety switches all in working condition. Chemically cleaned all outdoor condenser’s checked operations and refrigerant pressures. Tested all electrical voltage, capacitors, and amperage on all motors and compressors.