• Before carrying out any maintenance services, carry out the operations described in the paragraph
"stoppinG".
If you cannot restore the motor pump to its correct operation using the information contained in the
following table, contact a Specialist Technician.
PROBLEMS
The electric motor
does not start or
stops when running.
The pump does not
prime.
The pump does not
r e a c h m a x i m u m
pressure.
Irregular pressure and
flow rate (buttons).
Excessive noise.
CAUSES
A safety device has cut in on the system
to which the machine incorporating
the motor pump is connected (fuse,
differential switch, etc.).
The thermal switch has tripped.
Air suctioned.
Delivery circuit under pressure.
Pressure adjustment device not in
maximum pressure position.
Water supply insufficient or priming
from an excessive depth.
Suction circuit with bottlenecks.
Air suctioned.
Dirty suction filter.
Water supply insufficient or priming
from an excessive depth.
The motor pump has not finished
priming.
Suction circuit with bottlenecks.
Excessive temperature of supply
water.
U s e
a n d
Reset the protective device.
If the device cuts in again, do not use the
machine: contact a Specialist Technician.
Follow the instructions given in the
paragraph "safetY DeVices".
Check the integrity of the suction circuit.
Reset the pressure in the delivery circuit.
Run the device until the required pressure
is reached.
Check that the water supply flow rate or the
priming depth comply with the information
in the paragraph "characteristics
anD technical Data".
Check the suction circuit (above all check
that the suction filter is clean).
Check the integrity of the suction circuit.
Clean the filter.
Check that the water supply flow rate or the
priming depth comply with the information
in the paragraph "characteristics
anD technical Data".
Prime the pump as per the instructions
given in paragraph "operation".
Check the suction circuit (above all check
that the suction filter is clean).
Comply with the temperatures shown in
the paragraph "characteristics
anD technical Data".
M a i n t e n a n c e
6
EN
REMEDIES
27