Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 214
16.3 DEF System Machine Interface Requirements
16.3.1 Delayed Engine Shutdown (1206F Only)
16.3.1.1 Delayed Engine Shutdown Operation
Delayed engine shutdown is engine software feature available for the 1206F
product range only to help protect system components from damage during a
high exhaust temperature shutdown event.
If the DES feature is not used and the engine is shutdown while the exhaust
system is hot, the engine may enter into Inducement upon engine restart. The
service life of the DEF injector may be significantly reduced and DEF injector
failures due to hot engine shutdowns will likely not be warrantable.
Intentional OEM cool down procedures and operator training can minimize the
risk of temperature related failures of the exhaust system components. The
OEM must also consider the implications of the engine continuing to run at
Low idle after the operator has turn Off the ignition key switch.
Warning: Leaving a machine unattended when the engine is running may
result in personal injury or death. Before an operator leaves a running
machine due to Delayed engine Shutdown (DES) operation, ensure that
measures have been taken and proper warnings and instructions given to
leave the machine in a safe state.
When activated by Perkins EST this feature will ensure the actual engine
speed is held at Low idle post ignition key switch OFF signal for a maximum of
15 minutes to allow for the temperature within the exhaust to drop to a safe
limit before turning the engine ignition off. Table 16.4 provides some
information on the system operation if DES is active. The use of the DES
feature is recommended by Perkins as it ensures that the engine has had
sufficient time to cool exhaust system components when required to prevent
system damage.