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Risk of electric shock. Always disconnect the pump from the power source before handling inspections or repairs.
Symptom
A) The pump does not prime, the vacuum gauge
indicates a lower reading than normal.
B) The pump does not prime, the vacuum gauge
reading indicates higher than normal.
C) The pump priming good vacuum gauge
reading is normal, the manometer indicates a
lower pressure than normal.
D) The pump priming good vacuum gauge
reading is almost normal, reading in the
manometer is greater
E) The pump loses its priming during operation,
vacuum gauge reading drops to zero.
barmesa.com
F) T h e p u m p p r i m i n g p u m p s w e l l a n d
satisfactorily but noisy.
F) Motor overload
NOTE: Barmesa Pumps assumes no responsibility for damage or injury due to disassembly in the field. Disassembly of the pumps or supplied accessories other
than at Barmesa Pumps or its authorized service centers, automatically voids warranty.
Possible Cause(s)
1. Air leak in the suction system.
2. Insufficient liquid in the pump casing.
3. Low operating speed.
4. Bound pump.
5. Mechanical defect .
1.Pipe clogged suction.
1.The pump speed is very low.
2. Mechanical defects.
1.Discharge obstructed.
1. Suction dynamic level too high.
2. The pump is sucking air.
1. Pump base is loose.
2. Cavitation.
3. Bearings.
4. Vibration.
1. Low Voltage.
2. Overload
Troubleshooting Chart
Corrective Action
Threaded joints in the suction tightness.
Gaskets for no wear.
The mechanical seal for leaks.
The drain plug has leaks.
The vacuum gauge may be leaking.
That the pump´s body is filled with water.
The motor speed. (RPM)
Impeller rotates freely.
Internal parts are clean.
That the internal parts are not worn.
The suction line is clean
The voltage is correct.
The internal parts for wear.
The discharge is clear of obstructions
That the discharge valves operate correctly
When the pump is operating, never lacks water in the
suction.
For leaks in suction piping, flanges and gaskets.
That there is no vortex effect at the end of the
suction, this lack of water.
That screws are tight at the base.
There are no cracks in the base.
The dynamic level is not too high.
That the pumping capacity is not too much.
The pump is operating in the range of NPSHR.
If reducing flow makes the noise gone, then the
problem is in the point above; partially close the
discharge valve.
The bearings for wear.
That there is oil in the deposit.
The impeller does not have any foreign material.
The pump is operating in the range.
That the alignment is correct.
The voltage is correct.
The amperage of the plate is not exceeded.
There is no foreign material that may force the
impeller.
That the motor is suitable for the pump.
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