Troubleshooting
Trouble | Cause | Remedy | |
| Loose bolts and cap screws | Tighten all bolts and cap screws on all mechanical equipment | |
| and supports. | ||
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| Make certain all blades are as far from center of fan as safety | |
Unusual Fan Drive | Fan | devices permit. All blades must be pitched the same. See | |
| Fan User Manual. Clean off deposit | ||
Vibration |
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Worn fan shaft bearings | Check fan shaft endplay. Replace bearings as necessary. | ||
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| Unbalanced motor | Disconnect load and operate motor. If motor still vibrates, | |
| rebalance rotor. | ||
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| Blade rubbing inside of fan cylinder | Adjust cylinder to provide blade tip clearance. | |
Fan Noise | Loose bolts in blade clamps | Check and tighten if necessary. | |
| Fan shaft bearings | Grease bearings. | |
Scale or foreign substance Insufficient blowdown | See "Water Treatment" section of this manual | ||
in circulating water system | Water treatment deficiency | Consult competent water treating specialist. See "Water | |
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| Treatment" section of this manual | ||
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| Check to see if local heat sources are affecting tower. See if | |
| Entering wet bulb temp. is above design | surrounding structures are causing recirculation of tower | |
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| discharge air. Discuss remedy with Marley representative. | |
Cold Water Temperature
Too Warm
(See "Tower Operation")
Design wet bulb temp. was too low | May have to increase tower size. Discuss remedy with Marley | |
representative. | ||
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Actual process load greater than design | May have to increase tower size. Discuss remedy with Marley | |
representative. | ||
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Overpumping | Reduce water flow rate over tower to design conditions. | |
| Check motor current and voltage to be sure of correct contract | |
| horsepower. | |
Tower starved for air | fill and eliminators. Check to see if nearby structures or | |
| enclosing walls are obstructing normal airflow to tower. | |
| Discuss remedy with Marley representative. |
| Distribution basins overflowing | Reduce water flow rate over tower to design conditions. Be |
| sure hot water basin nozzles are in place and not plugged. | |
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Excessive Drift Exiting | Check to see that integral fill, louvers, and eliminators are | |
Tower | clean, free of debris, and installed correctly. If drift eliminators | |
| Faulty drift elimination | are separate from fill, make sure they are correctly installed in |
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| place. Clean if necessary. Replace damaged or worn out |
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| components. |
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