Arrived onsite for ac maintenance on 1 units. Asked customer to turn AC on to confirm operation. Checked all electrical: found fault in electrical wiring. Melted and burnt connections. It appears system is drawing a lot of power and amps which is causing the wires to melt. Observed the condenser fan motor and compressor motor are noisy. Chemically Cleaned outside unit, measured pressures for R22 at 50/110psi with 20 degree sub cooling with outside temperature at 47 degrees. Measured temperature drop at 24 degrees. System may have multiple refrigerant issue. Performed efficiency test utilizing MeasureQuick. Received a C- score. System running but has used over 90% of its life and requires repairs.
