|
Trouble Analysis Table
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| Trouble |
Causes |
Counter-Measures |
| Rise in cooling water temperature |
-
Excess or inadequate
cooling water flow.
-
Irregular flow of
air.
-
Recirculation of air
exhausted from tower.
-
Irregular operation
of sprinkler pipes.
-
Improper flow of
air.
-
Blocking of the
filling.
|
-
Adjust to the
specified flow.
-
Improve ventilation.
-
Same as above or
install baffles.
-
Remove dust and
scale.
-
Adjust the angle of
fan blades.
-
Clean the blocked
areas.
|
| Drop in the volume of cooling water |
-
Blocking of the
sprinkler pipe holes.
-
Blocking of strainer
mesh.
-
Drop in the water
level of water basin.
-
Improper selection
of water circulating pump.
|
-
See section for
maintenance and adjustment.
-
Remove strainer and
clean.
-
Adjust float valve.
-
Replace the pump
with one matching planned volume of water.
|
| Noise and vibration |
- Fan blade tips touching fan stack.
- Improper mounting of fan blades.
- Loose belts.
- Shortage of speed reducer oil.
|
- Adjust the fan mounting.
- Correct the blade angle settings.
- Tighten loose bolts.
- Supply oil up to the level
specified.
|
| Excessive current draw |
- Drop in voltage.
- Irregularities in the angles of
the fan blades.
- Overload through excess airflow.
|
- Check supply voltage. Notify
power company if necessary.
- Adjust fan blade angles.
- Adjust fan blade angles.
|
| Water carry over |
- Irregular operation of sprinkler
pipes.
- Blocking of the filling.
- Defective eliminator.
- Too much circulating water.
|
- Adjust the angle of the sprinkler
pipes in the sprinkler head.
- Eliminate blockage at the upper
edge of the filling.
- Renew the eliminator.
- Adjust the water flow by means of
the valve.
|
|
