Faults
MAN Industrial Diesel Engines D2848/40/42 LE201/203/211/213
72
Carefully read the Operating Instructions before starting any work!
This is especially valid for the chapter on General Safety Instructions
and the safety instructions in each of the chapters.
9.3 Fault Table
The “Remedy” column is only filled in when it is not clear from the "probable cause" what needs to be done.
Fault
Possible cause Remedy
Engine does not start D Fuel tank empty
D Fuel valve shut off
D Air in fuel system
D Fuel lines leak, broken or clogged
D Fuel filter/prefilter clogged
D Condensation in fuel
D Air filter clogged
D Exhaust clogged
(exhaust back pressure too high)
D Electric circuit interrupted
D Battery dead
D Starter/solenoid switch faulty
D Injectors clogged
D Valves do not close or are stuck
D Crank assembly is externally blocked
D Inner engine damage (piston seizure,
possibly caused by water in fuel)
D Drain water from fuel filter and
tank
D Set main switch to "on"
D Set transmission shift lever to
"N"
D Replace faulty fuses
D Repair any loose, corroded and
broken wires and contacts
D See information at "Starter"
D Remove objects that interfere
with the movement of the fan,
power output, alternator, etc.
Engine starts but does
not reach idle speed or
stalls
D Power take-off is on
D Fuel filter clogged
D Fuel grade does not meet the specifica
tions or is contaminated
D Air filter clogged
D See "Fluids and Lubricants...."
Engine does not start
or poorly starts in war
med up condition
D Engine shutoff faulty
D Insufficient compression in cylinder or
more than 3-4 bar pressure difference
between the cylinders
Engine does not start
or poorly starts in cold
condition
D Fuel filter clogged with paraffin D Replace filter.
Rough idle with engine
warm, misfires
D Air in fuel system
D Fuel lines leak, broken or clogged
D Fuel filter clogged
D Lower idle speed is set too low
D Valve clearance not OK
D Injectors or injection lines leak
D Turbocharger faulty
D Insufficient compression in cylinder or
more than 3-4 bar pressure difference
between the cylinders
D Help from the manufacturer ser
vice
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