NC

Algae and biofilm grow when biocide levels drop below effective concentration. Perform a shock biocide dose, clean the basin, and review the ongoing chemical dosing schedule with your water treatment provider.

Basin sediment accumulates when blowdown rate is too low or the side-stream filter is undersized or bypassed. Clean the basin, increase blowdown, and restore the filtration program.

Excessive drift means water droplets are escaping with the exhaust air. Inspect the drift eliminator sections for damage or missing panels and replace any that are cracked or displaced.

Fan vibration is usually an imbalanced or damaged blade, inconsistent blade pitch angle, or worn gearbox bearings. Inspect blades, verify all pitch angles are equal, and check gearbox oil level and bearing condition.

Reduced capacity is usually scaled fill blocking air-water contact, low water flow, or a fan running below design speed. Inspect fill, measure flow, and verify fan RPM.

Carryover means liquid water is leaving the tower with the exhaust air. Check fan speed against design, inspect drift eliminators for damage, and verify the circulating water flow rate is not above the design maximum.