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M0087475-06
The United States EPA requires the limiting of engine
speed and/or power (derate) in certain conditions, to
help ensure proper functioning of the engines
emission control system. The EPA allows the
temporary disabling of these limits (restoration of full
engine speed and power capability) during a qualified
emergency situation. The EPA defines a qualified
emergency situation as a significant direct or indirect
risk to human life. Below are examples of direct
versus indirect risks.
Direct – An emission control condition that inhibits
performance of an engine being used to rescue a
person from life-threatening situation.
Indirect – An emission control condition that inhibits
performance of an engine used to provide electrical
power to a data center that routes emergency
response communications.
The emissions-related derate can be disabled for up
to 120 hours of engine operation. The temporary
disabling of emissions-related derate is referred to as
"Operator Inducement Emergency Override" and
must be reported to the United States EPA. The
override must be paused by the operator if the
emergency ends before the 120 hours of override
operation has expired. While the override is paused,
the equipment will be subject to derate. The override
may only be reactivated if an emergency situation
returns prior to reaching an hour threshold of total
engine operation since initially activating the
override. This threshold is referred to as the backstop
timer. This threshold could vary by application, but
will typically be 300 hours. After 120 hours of override
use, or backstop timer threshold met, override will
expire, and the equipment will be subject to derate.
Once the override has expired, a Perkins distributor
will need to reset the override to use the override
again.
The override can only be enabled or disabled by an
authorized Perkins distributor using Perkins supplied
passwords. Once enabled, the override can be
activated by the operator using a switch or through
an electronic display menu (if equipped). Upon
activation, the check engine and action lamps will be
illuminated until and the override is reset. A code
indicating that the inducement emergency override is
active will also be active until the override is reset.
The override can only be reset by the engine
manufacturer, Perkins. A Perkins distributor can reset
the override using Perkins supplied passwords.
The following are prohibited under federal regulations
and subject to penalties imposed by the US EPA:
• Improper use of the override
• Failure to deactivate the override when
emergency has ended
• Failure to report use of the override.
Selective Catalytic Reduction Warning System
Civil penalties may be assessed per day operated in
violation, and can be severe.
Override Activation Method
The override can be activated using the electronic
service tool. Commercial applications may have a
switch near the engine, or an electronic display menu
to activate the override through. The display menu
and switch location may differ by application. The
override will only be available when engine is already
in inducement (derate). If the override has already
been enabled by an authorized Perkins distributor,
then the operator can turn on the override without
further input from Perkins. Upon activation, the
amber warning lamp will illuminate to alert the
operator that the override is active. A code will also
become active indicating that the engine emission
operator inducement emergency override is active.
The override must be paused by the operator if the
emergency ends before the 120 hours of override
operation has expired.
Setting the Override through an
Electronic Service Tool (EST)
• Go to "Configuration Parameters"
• Select "Aftertreatment Configuration"
• Select "Operator Inducement Emergency Override
Activation" to activate the override
53
Operation Section
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