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. 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
7. Water bypassing fills
8. Sprinkler jammed/water not being sprinkled and
distributed
•
:
1. Regulate to correct flow rate.
2. Adjust blade angle check and clean jail.
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.
7. Check sprinkler head and pipe leakages.
8. Repair sprinkler and distribution system.
Water
flow Less
•
:
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
3. Inlet jali chocked
•
:
1. Check bearings/motor
2. Correct blade angle to required setting
3. Clean air path
Noise
and Vibration
•
:
1. Fan mounting loose
2. Fan blocks loose
3. Fan unbalanced
4. Motor bearing faulty
5. Hub mounting on motor shaft loose
6. 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. Tighten and use end plate and shims if required.
6. Give proper clearances and adjust/ align components
Water
carry over
•
:
1. Sprinkler rotation too faster
2. Blocking of filter
3. Defective eliminator
4. Sprinkler too high above filter
•
:
1. Adjust sprinkler angle as to match
the specified rotation
2. Clean up any blocked part
3. Replace eliminator
4. Adjust as specified:
25mm - DMA 2116 to DMB 4116
50mm - DMA 6616 to DMB 8416
75mm - DMA 1260 and above
