Arrived onsite for ac maintenance on 1 system. Asked customer to turn AC on to confirm operation. Checked all electrical. Chemically Cleaned outside coil , measured pressures for 410a at 189/240psi with 0 degree sub cooling and 2 degree superheat with outside temperature at 90 degrees. Measured temperature drop at 6 degrees. Performed efficiency test utilizing MeasureQuick. System running but not cooling well and constantly running.
