Performed pm on all 6 units. Replaced provided filters. Flushed drains out with brush and hot water. Tested condensate pumps. Checked cleanliness of coils and blowers. Measured specs of capacitors and contactors. Found units 1,3,5 capacitors slightly out of spec, quoting customer to replace. Tightened electrical connections. Ran ac. Measured amp draw of compressors, blowers, and loop pumps. Measured delta loop pressures and temps. Measured delta air temps. Let systems satisfy thermostats. All units are operating normal. Also quoting customer to install media filter in cottage, only system using 2inch filters, 24x28x2.