35
TROUBLESHOOTING
WARNING
•
Also follow the instructions contained in the manual of the machine in which the motor pump is
integrated or that of any combustion engine fitted to the machine.
• Before doing any jobs, perform the operations described in the
“S
top
”
paragraph.
In the event of not being able to restore the correct operation of the motor pump with the aid of the information
contained on the following table, contact a
Skilled Technician
.
PROBLEMS
CAUSES
REMEDIES
The combustion engine
fails to start or operation
is not smooth.
Refer to the combustion engine manual. Refer to the combustion engine manual.
The electric motor fails
to start or stops during
operation.
One of the safety devices has triggered
of the plant to which the machine that
integrates the motor pump is connected
(fuse, differential switch, etc.).
Reset the safety device.
If it triggers again, do not use the machine and
contact a
Skilled Technician
.
The thermal or ammeter cut-out has
triggered.
Follow the instructions in the
“s
afety
devIces
”
paragraph.
The power cable plug is not properly
fitted.
Disconnect the plug from the socket and fit it
back correctly.
The electric motor hums
but does not start.
The electrical system and/or the
extension are inadequate.
Follow the instructions in the
“c
heckIng
and
connectIng
up
to
the
power
supply
”
paragraph.
The pump does not prime. Suction of air.
Check the integrity of the suction circuit.
Regulation valve positioned under
pressure.
Reset the pressure by means of the knob (3) (only
MTP MC 8 and MTP MC 18), or place the pump in
“BYPASS” with the lever (4).
The pump fails to reach
max pressure.
Pressure adjustment knob (3) not
tightened enough.
Turn the knob clockwise until required pressure
is achieved.
Not enough water supply or priming
too deep.
Make sure the water supply flow rate or priming
depth is in compliance with the indications in the
“s
pecIfIcatIons
and
technIcal
data
”
paragraph.
The lever (4) is in “BYPASS” position.
Move the lever to “PRESS” position.
Suction circuit blockages.
Check the suction circuit (especially make sure the
suction filter is clean).
Irregular pressure and flow
rate (pulsating).
Air suction.
Check the integrity of the suction circuit.
Suction filter dirty.
Clean the filter.
Not enough water supply or priming
too deep.
Make sure the water supply flow rate or priming
depth is in compliance with the indications in the
“s
pecIfIcatIons
and
technIcal
data
”
paragraph.
The motor pump has not completed
priming.
Prime the pump according to the indications of
the
“o
peratIon
”
paragraph.
Too many vibrations in the
delivery circuit.
Pressure accumulator not inflated
properly.
Reset correct inflation, following the indications in
the
“p
relImInary
actIvItIes
”
paragraph.
Too much noise.
Suction circuit blockages.
Check the suction circuit (especially make sure the
suction filter is clean).
Water supply temperature too high.
Keep to the temperatures indicated in the
“s
pecIfIcatIons
and
technIcal
data
”
paragraph.
Too much oil used and/or
whitish coloured oil (water
in oil).
Breakage of one or more diaphragms.
Follow the indications of the
“d
Iaphragm
breakage
”
paragraph.
EN
