| PROBLEM | CAUSE | REMEDY |
| Lowering of temperature drop across Cooling Tower | Fills condition is poor | Replace / Clean Fills |
| Fan not in operation | Check motor, put fan in operation in correct direction | |
| Distribution of water through Nozzles on Fills not correct | Clean the Nozzles | |
| Change in design parameters as water flow rate, Air flow rate | Check Pump flow rate, plant load, Clean Heat transfer surfaces wherever possible adjust Fan blade angle | |
| Wet Bulb temperature higher | Check design condition, try to avoid saturated air recirculation. | |
| Motor Not Working | Improper power supply | Consult supply terminals. |
| Phase supply improper | Check phase power, consult power supply terminal | |
| Starter not performing properly | Replaces starter, connect phase failure safety devices. | |
| Motor winding damaged | Send out for repair with specific explanation as per motor quality | |
| Bearing jammed | Clean / Replace Bearing | |
| Fluctuating water flow observed | Nozzles clogged | Clean nozzles |
| Pump performing at higher / lower discharge pressure | Check pump graph, check pump power, remove air trap, replace pump | |
| Sump water level low | Makeup sufficient water in basin | |
| Valves, pump baffles, filters chocked | Perform cleaning activity | |
| Water carry away from top of Tower | Water flow more than design parameter | Put the correct pump |
| Nozzles clogged, not in position | Clean nozzles, put in correct direction | |
| Fills Chocked | Clean / replace fills | |
| Motor RPM higher | Put the correct motor with comparatively lower RPM | |
| Air flow not sufficient | Fills clogged | Clean / replace fills |
| Fan angle of attack is not correct | Increase fan angle | |
| Fan speed not correct | Check motor power supply voltage, bearing condition | |
| Excess vibration & noise through fan | Fan not in good condition | Replace / repair fan |
| Balancing not done | Do static & dynamic balancing of fan | |
| Motor not performing in good condition | Check motor bearing | |
| Motor mounting frame not in good condition | Put a good motor support frame | |
| Fan touching casing | Create proper clearance between fan tip & casing |