6-2
Problem Cause (Reference page) Measures (Reference page) Operator *
The sluice valve is closed. Open the sluice valve. User
The piping is clogged up with foreign
matter.
Check and clean the piping. User
The strainer in the suction port is clogged. Check and clean the strainer. User
The suction port is exposed above the
liquid level.(3-2)
Replenish the liquid or lower the mounting
position of pump to adjust the liquid level.
User
The pump starts,
but cannot
achieve the
specified
discharge rate
and the specified
head.
The discharge pipe has a leak. Check and repair. Vendor
The bearing is worn and damaged.(5-1)
Replace the bearing.(5-1)
Contact the vendor because disassembly
and inspection are required.
Vendor
The grease is degraded.(5-1) Replace the bearing. Vendor
Overheat of
bearing
Incorrect installation of the pump and the
piping (3-2)
Check, and correctly install. User
The bearing is worn and damaged.
Replace the bearing.
Contact the vendor because disassembly
and inspection are required.
Vendor
The motor is in open-phase operation. Check the wiring. User
The impeller is clogged with foreign matter,
resulting in an imbalance.
Disassemble and check.
Contact the vendor because disassembly
and inspection are required.
Vendor
Cavitation has occurred. Contact the manufacturer and vendor. User
Unusual noise
and unusual
vibration of the
pump
Incorrect installation of the pump and the
piping (3-2)
Check, and correctly install. User
Water hammer
occurs.
Hammering has occurred when the valve is
opened and closed rapidly.
Provide a pressure damper (e.g.
accumulator).
User
*It is specified for reference because the range where the measure can be taken varies depending on User.
Even though the problems of which the operator is User, request the vendor or contact the nearest Teral
office, if you have any question.
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