Perkins 904D-E28T Operation And Maintenance Manual page 42

42 M0108133-04
Operation Section
Engine Operation with Intermittent Diagnostic Codes
Note: If the customer has selected "DERATE" and if
there is a low oil pressure condition, the Electronic
Control Module (ECM) will limit the engine power
until the problem is corrected. If the oil pressure is
within the normal range, the engine may be operated
at the rated speed and load. However, maintenance
should be performed as soon as possible.
The active diagnostic code should be investigated.
The cause of the problem should be corrected as
soon as possible. If the cause of the active diagnostic
code is repaired and there is only one active
diagnostic code, the diagnostic lamp will turn off.
Operation of the engine and performance of the
engine can be limited as a result of the active
diagnostic code that is generated. Acceleration rates
may be significantly slower. Refer to the
Troubleshooting Guide for more information on the
relationship between these active diagnostic codes
and engine performance.
i01797063
Engine Operation with
Intermittent Diagnostic Codes
If a diagnostic lamp illuminates during normal engine
operation and the diagnostic lamp shuts off, an
intermittent fault may have occurred. If a fault has
occurred, the fault will be logged into the memory of
the Electronic Control Module (ECM).
In most cases, it is not necessary to stop the engine
because of an intermittent code. However, the
operator should retrieve the logged fault codes and
the operator should reference the appropriate
information in order to identify the nature of the event.
The operator should log any observation that could
have caused the lamp to light.
• Low power
• Limits of the engine speed
• Excessive smoke, etc
This information can be useful to help troubleshoot
the situation. The information can also be used for
future reference. For more information on diagnostic
codes, refer to the Troubleshooting Guide for this
engine.