Troubleshooting
Trouble | Cause | Remedy | |
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| Loose bolts and cap screws | Tighten all bolts and cap screws on all mechanical equipment and | |
| supports. | ||
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Unusual fan drive 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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| Adjust fan impeller. Adjustment may need to be axial i.e. moving | |
| Impeller rubbing inside of cylinder | impeller along the shaft to centralize it between the cylinders or radial | |
Fan noise | by repositioning bearing or bearings to get the impeller concentric | ||
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| within the inlets. | |
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| Fan shaft bearing. | Grease bearings. | |
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Belt squeal or chirping | Belt slipping | Adjust belt | |
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Scale or foreign substance in | Insufficient blowdown | See "Water Treatment" section of this manual. | |
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| Consult competent water treating specialist. See "Water Treatment" | ||
circulating water system | Water treatment deficiency | ||
section of this manual | |||
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| Check to see if local heat sources are affecting fluid cooler. See if | |
| Entering wet bulb temperature is above design | surrounding structures are causing recirculation of tower discharge air. | |
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| Discuss remedy with Marley representative. | |
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| Design wet bulb temperature was too low. | May have to increase fluid cooler size. Discuss remedy with Marley | |
Cold water temperature too | representative | ||
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warm. | Actual process load greater than design | May have to increase fluid cooler size. Discuss remedy with Marley | |
| representative | ||
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See "Fluid Cooler Operation." |
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Overpumping | Reduce water flow rate over fluid cooler to design conditions. | ||
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| Check motor current and voltage to be sure of correct contract | |
| Fluid cooler starved for air | horsepower. Clean eliminators. Check to see if nearby structures or | |
| enclosing walls are obstructing normal airflow to fluid cooler. Discuss | ||
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| remedy with Marley representative. | |
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Excessive drift exiting fluid | Faulty drift elimination | Check to see that eliminators are clean, free of debris and installed | |
cooler | correctly. Replace damaged or worn out eliminators panels. | ||
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| Water level in tower too high | Adjust water level to correct level. | |
Water leaking from fan scroll |
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Multiple fan motors serving a single coil section not | Ensure all fans are operating simultaneously and at the same speed | ||
| being cycled simultaneously | ||
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