Annovi Reverberi HPJ 8.12 REG EM Manuel D'utilisation Et D'installation page 47

The problems and solutions listed in the table do not provide all the possible information on the faults or malfunctions
that may occur during installation and operation.
Any repairs that require precise technical expertise or special skills must only be performed at an authorised service
centre.
Contact your nearest technical service centre for more information.
Problem
The electric motor will not start
The electric motor overheats
The pump does not reach the
specified pressures
Irregular variations in pressure
Vibrations on lines
Pressure drop
(1) Operations which must be carried out at an authorised service centre
English
TROUBLESHOOTING
Likely cause
Incorrect power supply
Incorrect electrical connection of the motor
to the power supply line
Damaged rotor
Damaged rotor bearings
Insufficient ventilation for the motor
The electric motor is overloaded
The pump takes in air
Insufficient intake flow rate
Worn intake and delivery valves
Worn safety valve seat
Damaged pressure regulating valve
Pressure regulating valve incorrectly
adjusted
Worn gaskets
Unsuitable, worn nozzle
Worn intake and delivery valves
Valves blocked by dirt
Air being sucked into system
Worn gaskets
Valves jammed
Safety valve malfunction
Malfunction of the pressure regulating
valve
Safety valve dump line too small
Pressure damper flat
The pump takes in air
Worn nozzle
Worn intake and/or delivery valves
Valves blocked by dirt
Worn safety valve seat
Worn gaskets
47
Remedy
Check that the power supply and the load
factor correspond to the values indicated
on the motor's data plate
Check that the connection corresponds to
the wiring diagram (see "Electrical system
connection")
Replace the rotor (1)
Replace the bearings (1)
Check that the flow of air is not obstructed
(See "Cleaning the electric motor fan cover
and blades")
Reduce the load
Restore the seal on the intake line
Increase the size of the intake lines
Remove any kinks in the lines
Increase the filter capacity or clean the filter
cartridge
Increase the rpm to the rated speed
Replace the valves (1)
Replace the valve
Replace the pressure regulating valve
Adjust the valve correctly
Replace the gaskets (1)
Replace the nozzle
Replace the valves (1)
Clean the valves (1)
Restore the seal of the intake line
connections
Replace the gaskets (1)
Replace the valves (1)
Replace the safety valve
Replace the pressure regulating valve
Increase size of safety valve dump line
Restore pressure damper to correct
inflation pressure
Restore the seal on the intake line
Replace the nozzle
Replace the valves (1)
Clean the valves (1)
Replace the valve
Replace the gaskets (1)
8
Use and Installation