22
8- TROUBLESHOOTING
FAULT CAUSE REMEDY
When starting the pump does
not supply water and does not
make any noise
Not enough water capacity in the inlet
circuit
Blocked valves
The outlet line is closed and does not al-
low the air in the head to come out
Check the circuit and water level in the
reservoir.
Check and replace if necessary.
Drain the outlet line until the water regu-
larly comes out
The pump is noisy and beats
improperly
Pump is sucking air
Inlet circuit of improper size
Jammed or worn valves
Worn high pressure seals
Malfunctioning of the pressure regulator
Problems with driving
The number of revolutions is higher than
the value indicated on the label
Check suction circuit and possible air in-
gress
Check the correct size of the inlet circuit.
Check the filter cleaning
Check and if necessary replace
Check alignment, gaps, calibration.
Restore the proper number of revolutions
Vibrations or strokes on the
pipeline
Air intake
Malfunctioning of the pressure regulator
The pressure regulator by-pass line is un-
dersized or obstructed
Blocked valves
Check the suction circuit and possible
air ingress
Check and if necessary replace.
Check the correct sizes
Check and/or replace if necessary..
The pump normally runs, but
does not achieve the indicated
performance
Inlet circuit of improper size
Malfunctioning or not adjusted pressure
regulator
Nozzle of improper size or worn
Worn plunger seals
Worn check valves
The number of revolutions is lower than
the value indicated on the label
Check the correct size of the inlet circuit.
Check the filter cleaning
Check and/or replace if necessary
Restore the proper number of revolutions
The pump is noisy and over-
heat
Excessive temperature of liquid
The working pressure is higher than the
one indicated in the label
The number of revolutions is higher than
the value indicated on the label
Excessive strain of the belts
Oil not at its level, contaminated or ex-
hausted
Worn bearings
Reduce the water temperature
Restore the proper values
Check, fill or change if necessary.
Replace
Water dripping below the
pump
Worn Packings
Worn 0-Ring plunger retainer
Check and/or replace
Check and/or replace
Oil dripping
Worn Oil seal Check and/or replace
The pressure gauge shows ir-
regular oscillations at high
pressure with open lance
Valve with impurities
Worn Plunger seal
Worn Check valves
Clean the valve and lubricate the parts with
grease
Check and/or replace
Check and/or replace
CAUTION!: nozzle is subject to wear, to be replaced every time your pump will not reach the required pres-
sure; in fact, when worn, enlarging the size of the water hole, the actual flow rate increases and pressure de-
creases.
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