ESA 1-2 Maintenance performed today. Checked system operations, tightened electrical connections, rinsed cu coils, flushed drain line with green cleaner, water and pulled vacuum, replaced 20x20x4 air filter, installed new drain pan treatment, UV Lamp due for replacement per manufacturer guidelines, annual replacement for optimal growth control. Drain line does have some blockages and a drain solve treatment would help remove the slime. Surge Protection still operational. System operations normal.