11 TROUBLESHOOTING
Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL
180
Pub. No. 291Y1-40720 Revision: 5
Troubleshooting
• Devices and equipment outside the scope of our supply are included in the facility. For the
details, refer to such a document as the specification sheet prepared by the generator
supplier.
• For the devices and equipment outside the scope of our supply, refer to the corresponding
manual of the generator and the supplier's operation manual.
Starter Does Not Crank or Cranks Slowly, Resulting in Starting Failure
Table 11-1 Starter Does Not Crank or Cranks Slowly, Resulting in Starting Failure
Problem Cause Remedies Reference
Page
Starter Does Not
Crank or Cranks
Slowly, Resulting
in Starting Failure
Electrical Sys-
tem
Faulty wire connec-
tion, insufficient ca-
pacity
• Check fuse.
• Check wiring connection between
battery, starter, and starter switch.
-
Battery charge fault • Alternator - Check 169
• Check and adjust the belt. 126
128
Capacity degrada-
tion of the battery
• Check the level and specific
gravity of the electrolyte
• Charge battery.
• Replace battery.
168
Faulty starter or
faulty safety relay
• Contact your MHIET dealer. 10
Lubrication
System
Oil viscosity too
high
• Change with appropriate engine
oil.
109
147
Excessive oil level • Engine Oil Level - Check
• Check lubrication system.
149
Engine Body Wear or lock of slid-
ing parts
• Contact your MHIET dealer. 10
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