Slurry Pump
WH22AAAAAA0EN_03B.DOC JAN 04-W08
Care and maintenance
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9.6 Fault finding
9.6.1
General
Use the checklist provided to quickly establish the cause of any running problems. The
checklist assumes that the equipment normally operates satisfactorily.
WARNING
WHERE POSSIBLE CHECKS MUST BE CARRIED OUT WITH THE POWER SUPPLY SECURELY ISOLATED.
WHERE POWER IS REQUIRED FOR CARRYING OUT THE CHECKS, TAKE EVERY PRECAUTION
PRESCRIBED IN ORDER TO AVOID INJURY TO PERSONNEL. ELECTRICAL WORK MUST ONLY BE
CARRIED OUT BY A FULLY QUALIFIED ELECTRICIAN.
A multimeter, a test lamp and appropriate circuit diagrams will be required to carry out
checks on electrical equipment.
NOTE: IF ALL FAILS, CONTACT METSO MINERALS FOR FURTHER ADVICE.
9.6.2 Pump fails to start
Is power supply live ?
No⇒ Check that:
Yes
⇓
⇓
⇓
⇓
⇓
• mains switch is closed;
• starter and its fuses are intact;
• control voltage is available for starting;
• overload protection has been reset;
• all phases are live;
• power cable to motor is not damaged.
Can pump be started manually ?
No⇒ Is there a fault with:
Yes
⇓
⇓
⇓
• level control equipment ?
• other monitoring or control equipment ?
Consult monitoring equipment documentation
and change any faulty equipment.
Is the shaft jammed ?
Yes⇒ Securely isolate the power supply.
No
⇓
⇓
⇓
• Remove the belt guard and try to rotate the
pump shaft by hand.
• Dismantle the pump and clean behind the
impeller. See section 9.5.2. Flush out the
pump and the pump sump.
⇓
⇓
⇓
• Dismantle the drive and check that both the
motor and pump shaft can be rotated. Fit
new bearings if necessary. See section 9.5
and the motor manufacturer’s instructions.
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