7 Troubleshooting
7.1 Operation troubleshooting
Between regular maintenance inspections, be alert for signs of motor or pump trouble.
Correct any trouble immediately and avoid costly repair and shutdown.
Symptom Cause Remedy
No liquid delivered
Lack of prime Fill pump and suction pipe
completely with liquid.
Loss of prime Check for leaks in suction pipe joints
and fittings; vent casing to remove
accumulated air.
Suction lift too high. If no obstruction at inlet, check for
pipe friction losses. Static lift may be
too great. Measure with mercury
column or vacuum gauge while
pump operates. If static lift is too
high, liquid to be pumped must be
raised or pump lowered.
Discharge head too high. Check pipe friction losses. Large
piping may correct condition. Check
that valves are wide open.
The motor speed is too low. Check whether motor is directly
across-the-line and receiving full
voltage. Or frequency may be too low;
motor may have an open phase.
Wrong direction of rotation. Check motor rotation with directional
arrow on pump casing.
Impeller completely plugged. Dismantle pump and clean impeller.
7 Troubleshooting
100 e-XC INSTRUCTION MANUAL
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