Arrived onsite for ac maintenance on 1 system. Asked customer to turn AC on to confirm operation. Outside condenser is not level and surrounded by earth. Recommend leveling to ensure compressor receives correct amount of lubricant. Checked all electrical. Chemically Cleaned outside unit, measured pressures for R22 at 50/112 psi with 13 degree sub cooling with outside temperature at 61degrees. Measured temperature drop at 20 degrees. System may be 5 percent low on refrigerant. Cleaned out condensate line. Inside coil rusting. Observed rusting on outside cabinet which means the system may not be properly remove condensate. This could lead to a leak in the ceiling. Did not observe a ceiling protection device. Performed efficiency test utilizing MeasureQuick. System running but recommend replacing due to age and recommended repairs..
