Impellor, check valve or filter
clogged
Clean Impellor, check valve or filter
Impellor, partially filter clogged
Clean Impellor, or filter
Mechanical friction in pump
Check whether there are any obstacle or bend in
pump rotor
Soft seals are over tightened
Worn or malfunctioned
impellor
Bearing covers are over
tightened.
Check the covers and make necessary corrections
Flow rate is less than pumps
necessary flow rate
Increase the flow rate, use by pass valve or line if
necessary
Clutch adjustment is broken
Check the clutch rubber and adjust again
There is so much grease in
bearing
Imbalanced rotating parts
Adjust the balance of rotating parts
Pump operates out of its
operation region
Check the operational region values
Check the shaft and replace if necessary
Insufficient lubrication or
lubricant is dirty
Check the amount of lubricant, clean bearing bed
and capsules and grease again
Check the motor,. Motor is not suitable for its air
conditioning position
Density or viscosity of
discharged liquid is more than
given value
Use motor having greater power
Table 4
22