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Problem
Motor is
overheated.
Discharge
volume is
suddenly
lowered.
Pump
vibrates.
When Discharge
Valve is Closed
When Discharge
Valve is Opened
Pointer of
vacuum gauge
indicates high
value.
Cause
a
Voltage is lowered.
a
Overload.
a
Ambient temperature is
high.
a
Strainer is clogged with
foreign matter.
a
Foundation is defective.
a
Anchor bolt is loose.
a
Suction pipe is closed.
Cavitation is caused.
a
Wear or melting of pump
bearing.
a
Magnet capsule or spindle
is damaged.
a
Dynamic balance of drive
magnet assembly
fluctuates.
a
Impeller and/or magnet
capsule is in contact with
fixing section.
a
Wear of motor bearing.
K
Check whether the voltage and
frequency levels are adequate.
K
Check whether the specific
gravity and viscosity of liquid
are adequate.
K
Improve air ventilation.
K
Eliminate foreign matter.
K
Reinstall.
K
Retighten bolts.
K
Clean, and eliminate cause of
cavitation.
K
Replace.
K
Replace.
K
Eliminate cause or replace.
K
Replace.
K
Replace bearing or motor.
Symptom
Inspection and Measures
