Check unit for noise and vibration.
Check V-belt condition and tension.  Adjust if needed, or replace.
Clean and wash permanent filters.  Recharge wire mesh filters with oil.
Replace disposal filters.
Drain and clean condensate pan.
Lubricate fan shaft bearings (if not sealed).
Lubricate motor bearings sparingly using SAE 10W motor oil (if not sealed).
Clean coils by vacuuming or brushing.
Use fin comb to straighten coil fins. 
Clean strainers for accumulation of dirt.
Check controls, trap, freeze-stat, and control-stat for proper operation.
Clean fan blades and interior unit surfaces to remove soil.
Damp wipe exterior surfaces.
Clean surrounding area, record results and findings and report any needed repairs or operational adjustments.

Obtain and review manufacturer's instructions.  Follow manufacturer’s instructions or procedures if different to these instructions or procedures.
De-energize, lockout, and tag the electrical circuits.
Review Standard Operating Procedures for Selection, Care, and Use of Respiratory Protection.

Standard and Phillips head screw drivers-various sizes; Pliers-vise grip (2), slipjoint, needlenose, diagonal; cutting pliers, side cutters; Ball peen hammer; Hack saw and spare blades; 3/8' drive socket set and ratchet; Small set of Allen wrenches; Assorted center punches, drift punches, and steel chisel; 12' measuring tape; Crescent wrenches 4" to 8";  Open and box end wrenches ¼" to ¾"; File; Pipe wrenches to 14"; Small level and square; Pocket knife; Flashlights; Grease guns and oilers; Wire brush; Extension cord and inspection lights; Various cleaning tools - brushes, scrapers, etc; Emery cloth.
Refrigeration – gauges; Leak detector-electronic or halogen; Pocket thermometer; Clamp on meter (volt - ohm - amp meter); Flaring tool; Tubing cutters; Packing kit and packing; Crescent wrenches to 14"
Cleaning materials and equipment. 
Fin comb
Oiler
Filters
Belts
Vacuum