VM Motori R750 Serie Manual Instrucciones Para El Uso página 86

TROUBLESHOOTING
The information below are provided to facil-
itate the identification and solution of possi-
ble anomalies and failures which may occur
during operation. Some of these problems
can be solved by the user, while others re-
quire specific technical skills or abilities,
therefore they should be exclusively dealt
with by qualified technicians with extensive
experience in the specific sector of interven-
tion.
Problem
During the ignition
phase the control board
and the engine do not
start.
The engine does not
start
The starter motor runs
GB
idle
The starter motor is not
running
The engine stops after
ignition
English
INFORMATION ABOUT FAILURES
Cause
Flat battery
Blown fuse
The electric cables are disconnected or
they do not guarantee continuity
Failure of engine revolution sensor
Presence of air in the fuel supply circuit
Dirty or faulty injectors
Faulty fuel pressure regulation valve
Failure of the start control
Water and/or impurities in the fuel
Clogged fuel filter
Electromagnet failure
Flat battery
Interrupted electric connection
Worn brushes
Presence of air in the fuel supply circuit
Clogged fuel filter
Injection pump malfunction
Faulty fuel pressure regulation valve
Presence of air in the fuel supply circuit
Water and/or impurities in the fuel
The electric cables are disconnected or
they do not guarantee continuity
- 38 -
Warning - Caution
Activation of a visual and/or acoustic
signal indicates some form of malfunc-
tion. In this case, turn the engine off im-
mediately and
documentation supplied by the manufac-
turer of the vehicle/device in which the
engine is installed.
Remedy
Recharge or replace battery
Replace fuse
Check the electric connections
Replace the sensor
Apply to an authorised workshop
Carry out bleeding (see "Fuel supply circuit
bleeding")
Replace the injectors
Apply to an authorised workshop
Replace the valve
Apply to an authorised workshop
Replace the start control
Apply to an authorised workshop
Apply to an authorised workshop
Replace filter (see "Fuel filter replace-
ment")
Check the starter motor
Apply to an authorised workshop
Recharge or replace battery
Check the electric connections
Replace the worn brushes
Apply to an authorised workshop
Carry out bleeding (see "Fuel supply circuit
bleeding")
Replace filter (see "Fuel filter replace-
ment")
Apply to an authorised workshop
Replace the valve
Apply to an authorised workshop
Carry out bleeding (see "Fuel supply circuit
bleeding").
Apply to an authorised workshop
Check the electric connections
R750
consult the
Information about failures