User Manual

Troubleshooting
Diesel engine
28/01/03 M40I_1500G_GE
M
40.2
REV.3-07/06
Problem Possible cause Solution
ENGINE
The motor does not start up 1) Start-up switch (I6) (where it is assembled) in
incorrect position
2) Emergency button (L5) pressed
3) Preheating (where it is assembled)
4) Engine control unit or starting key faulty.
5) Battery low
6) Battery cable terminals loose or corroded
7) Start-up motor defective
8) No fuel or air in feed circuit
9) Malfunction on feed circuit: defective pump,
injector blocked, etc.
10) Air lter or fuel lter clogged
11) Air in the gasoil lter.
12) Motor stopping device defective
13) Malfunction on electrical power circuit on ge-
nerator control panel
1) Check position
2) Unblock
3) Lacking or insufcient preheating phase for
sparkplugs.
Malfunction in circuit: repair.
4) Replace
5) Recharge or replace.
Check the battery charge circuit on motor and
automatic panel.
6) Tighten and clean. Replace if corroded.
7) Repair or replace.
8) Rell tank, un-aerate the circuit.
9) Ask for intervention of Service Department.
10) Clean or replace
11) Take the air out lling the lter with gasoil.
12) Replace.
13) Check and repair.
The motor does not accelerate.
Inconstant speed.
1) Air lter or fuel lter clogged.
2) Malfunction on feed circuit: defective pump,
injector blocked, etc.
3) Oil level too high.
4) Motor speed regulator defective.
1) Clean or replace.
2) Ask for intervention of Service Department.
3) Eliminate excess oil.
4) Ask for intervention of Service Department
Black smoke 1) Air lter clogged.
2) Overload.
3) Injectors defective. Injection pump requires
calibration.
1) Clean or replace
2) Check the load connected and diminish.
3) Ask for intervention of Service Department.
White smoke 1) Oil level too high.
2) Motor cold or in prolonged operation with little
or no load.
3) Segments and/or cylinders worn out.
1) Eliminate excess oil.
2) Insert load only with motor sufciently hot
3) Ask for intervention of Service Department.
Too little power provided by
motor.
1) Air lter clogged.
2) Insufcient fuel distribution, impurities or water
in feed circuit.
3) Injectors dirty or defective.
1) Clean or replace.
2) Check the feed circuit, clean and rell once
again.
3) Ask for intervention of Service Department.
Low oil pressure 1) Oil level insufcient
2) Air lter clogged.
3) Oil pump defective.
4) Alarm malfunction.
1) Reset level. Check for leaks.
2) Replace lter.
3) Ask for intervention of Service Department.
4) Check the sensor and electrical circuit.
High temperature 1) Overload
2) Insufcient ventilation.
3) Insufcient coolant liquid (Only for water cooled
motors)
4) Water radiator or oil clogged (where it is as-
sembled)
5) Water circulating pump defective (Only for
water cooled motors)
6) Injectors defective. Injection pump requires
calibration
7) Alarm malfunction
1) Check the load connected and diminish.
2) Check the cooling vent and relative transmis-
sion belts
3) Restore level. Check for leaks or breakage in
the entire cooling circuit, pipes, couplings, etc.
4) Clean cooling ns on radiator
5) Ask for intervention of Service Department
6) Ask for intervention of Service Department
7) Check the sensor and electrical circuit