6 Troubleshooting
6.1 Troubleshooting
Engine does not turn when starter is actuated
Component
Cause
Action
Battery
Low or faulty
Charge or replace (see manufacturer's
documentation).
Cable connections faulty
Check if cable connections are proper‐
ly secured (see manufacturer's docu‐
mentation).
Starter
Engine cabling or starter faulty
Check if cable connections are proper‐
ly secured, contact Service.
Engine cabling
Faulty
Check (→ Page 140).
Engine/generator
control system
Assemblies or connectors possibly
loose
Perform visual inspection (see manu‐
facturer's documentation).
DDEC
Plug-in connections possibly loose
Check plug-in connections
(→ Page 143).
Engine
Running gear blocked (engine cannot
be barred manually)
Contact Service.
Engine turns but does not fire
Component
Cause
Action
Starter
Poor rotation by starter: Battery low or
faulty
Charge or replace battery (see manu‐
facturer's documentation).
Engine cabling
Faulty
Check (→ Page 140).
Fuel system
Air in fuel system
Vent fuel system (→ Page 97).
DDEC
Faulty
Contact Service.
Engine fires unevenly
Component
Cause
Action
Fuel injection equip‐
ment
Injector faulty
Replace (→ Page 91).
Engine cabling
Faulty
Check (→ Page 140).
Fuel system
Air in fuel system
Vent fuel system (→ Page 97).
DDEC
Faulty
Contact Service.
Engine does not reach rated speed
Component
Cause
Action
Fuel supply
Fuel prefilter clogged
Clean or replace filter element.
Easy-change fuel filter clogged
Replace (→ Page 98).
Air supply
Air filter clogged
Check signal ring position of service in‐
dicator (→ Page 102).
MS150049/02E 2012-11 | Troubleshooting | 49
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