|
|
|
Lowering of Cooling capacity
|
|
| |
1 |
Electric blackout |
2 |
Fuse burnout due to damaged Contacts |
3 |
Insufficient switch capacity |
4 |
Bad switch contact |
|
1 |
Contact power company |
2 |
Get proper fuse |
3 |
Change to proper switch |
4 |
Adjust / Clean Contacts. |
|
2 |
Sudden lowering of motor speed(rotations per minute) |
|
1 |
Defective starter |
2 |
Too heavy load
|
3 |
Low supply voltage |
|
1 |
Check starter for defects |
2 |
Reduce the load by checking motor current
|
3 |
Consult power company
|
|
3 |
Cannot rev up motor speed (rotations per minute) |
|
1 |
Defective starter / starter connections |
2 |
Connection of rotary and fixed section
|
3 |
Motor winding damaged
|
|
1 |
a. Correct connection according to name plate
b. Check supply voltage across all 3 phases
c. Check current in all 3 phases |
2 |
Send out to repair shop
|
3 |
Send out to repair shop
|
|
|
|
|
|
1 |
Motor getting over heated |
|
1 |
Too heavy load |
2 |
| a |
Lowering of voltage supply |
 |
| b |
Unbalanced voltage supply |
|
3 |
Contact between rotary and fixed section |
|
1 |
Lighten load proper level |
2 |
| a |
Consult power company |
|
| b |
Consult power company |
|
3 |
Change bearing or supplement grease |
|
Rise in water temperature
|
|
|
1 |
Water flow above specified flow |
2 |
Air flow below specified flow
|
3 |
Load higher than design
|
4 |
Fill checked or coated |
5 |
Fresh air intake not sufficient or area sufficient or area around tower not as specified. |
6 |
WBT high |
|
1 |
Regulate to correct flow rate. |
2 |
Adjust blade angle check and clean jali.
|
3 |
Adjust load to correct level.
|
4 |
Clean / replace fills. Use proper water (Make up )quality |
5 |
Improve ventilation and ensure exhaust air does not get recycled. |
6 |
Check design condition and ensure no recycling of exhaust air. |
|
|
|
1 |
Filter chocked |
2 |
Sprinkler pipes chocked
|
3 |
Level of water low in pump
|
4 |
Pump small |
|
1 |
Clean water filter. |
2 |
Clean pipes and holes
|
3 |
Adjust float/ inlet flow ensure proper make-up |
4 |
Replace for correct flow volume |
|
|
|
1 |
Fan speed low |
2 |
Fan blade angle incorrect
|
|
1 |
Check bearings/motor |
2 |
Correct blade angle to required setting
|
|
|
|
1 |
Fan mounting loose |
2 |
Fan blocks loose
|
3 |
Fan unbalanced
|
4 |
Motor bearing faulty |
5 |
Many parts rubbing against tower components |
|
1 |
Tighten mounting bolt and correct/ replace if needed. |
2 |
Tighten blade in hub
|
3 |
Rebalance and adjust
|
4 |
Check and grease or replace bearing on motor. |
5 |
Give proper clearances and adjust/ align components |
|
|
|
| |
For Round Bottle Tower |
1 |
Fan mounting loose |
|
For Rectangular Tower |
|
Certain Nozzles chocked |
|
Some Nozzles may not be vertically downward |
2 |
Inlet water pressure high |
3 |
Blocking of fills |
|
1 |
Adjust sprinkler angle as to match the specified rotation |
|
Clean Nozzles |
|
Reinstall Nozzles vertically downward
|
2 |
Reduce water pressure |
3 |
Clean up any blocked part or change |
|
