XQ570 Rental Generator Set Caterpillar


Selective Catalytic Reduction Warning System

Usage:

C18 ME5
The selective catalytic reduction (SCR) system is a system used to reduce NOx emissions from the engine. Diesel exhaust fluid (DEF) is pumped from the DEF tank and is sprayed into the exhaust stream. The DEF reacts with the SCR catalyst to reduce NOx and leaves a nitrogen and water vapor. The Exhaust Gas Recirculation (EGR) system cools, measures, and introduces recalculated exhaust gas into the intake manifold to aid in NOx reduction.


NOTICE

Stopping the engine immediately after the engine has been working under load can result in overheating of SCR components.

Refer to the Operation and Maintenance Manual, "Engine Stopping" procedure to allow the engine to cool and to prevent excessive temperatures in the turbocharger housing and the DEF injector.



NOTICE

Allow at least 2 minutes after shutting down the engine before you turn the battery disconnect switch to OFF. Disconnecting the battery power too soon will prevent purging of the DEF lines after the engine is shut down.


Emergency Inducement Override

This feature is active as shipped from the factory, but can be deactivated by your Cat dealer. More detailed information on activating, deactivating, or resetting override, may be available, contact your Cat dealer.

Before you attempt the procedures documented in this Operation and Maintenance Manual, "Emergency Inducement Override", make sure that you have read and understand the information in this document.

The United States Environmental Protection Agency ( US EPA) requires limiting of the engine speed and/or power in certain conditions. This limiting helps ensure proper functioning of the engine emission control system. The EPA allows the temporary disabling of these limits during a qualified emergency situation. The temporary disabling of emissions control is referred to as Inducement Emergency Override and must be reported to the US EPA. Per the US EPA the following conditions qualify for overriding the imitation of power and/or speed.

  • A significant direct or indirect risk to human life.

Below are examples of direct verses indirect risks.

Direct - An emission controls condition that inhibits performance of an engine being used to rescue a person from life-threatening situation.

Indirect - An emission controls condition that inhibits performance of an engine being used to provide electrical power to a data center that routes 911 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 Emergency Inducement Override and must be reported to the US EPA. The override can only be reset by the engine manufacturer, Caterpillar®. A dealer can reset the override using Cat supplied passwords. Improper use of the override, and failure to report use of the override is prohibited under federal regulations. Such violation is subject to penalties by the US EPA. The maximum civil penalty is $3,750 per day of operation in violation.

Override Overview

When an emergency situation occurs, initial activation of the override is allowed without input from Caterpillar. Prior to activation, the operator will be notified of the following on display : "EMERGENCY USE ONLY. SEE OWNERS MANUAL. PENALTIES APPLY FOR MISUSE." Upon activation, the check engine, and action lamps will also illuminate to alert the operator that the override is active. The override must be paused by the operator if the emergency ends before the 120 hours of override operation has expired. Pausing the override can be accomplished via the emergency inducement override switch located in the control panel. While paused, the equipment will be subject to inducements (derates). The override may be reactivated with the emergency inducement override switch if an emergency situation returns prior to 1,163 hours of total operation since initially activating override. After 120 hours of override use, or 1,163 hours of total engine operation since the override was initially activated, the override will expire, and the equipment will be subject to inducements. Upon activation, the check engine and action lamps will continue to be illuminated until the override is reset. If the override has expired, the dealer will need to reset the override in order to use the override again.

Setting the Override via the Control Panel



Illustration 1g03776415
Inside of control panel (face lowered)
(1) location of the override switch

A switch has been installed inside the control panel for turning the override on. There is a dedicated STG pin on the J1 side of the A5 Electronic Control Module (ECM) that can be used. Operators must be trained properly to understand that there could be severe penalties as mentioned above for misusing the switch.

Resetting the Override

The override needs to be reset by your Cat dealer through Cat ET whenever the override has expired. The override cannot be used again until the override is reset. The check engine and action lamps will continue to be illuminated until override is reset. The override may be reset at any point after the initial activation.

Override Usage Report

To comply with federal regulations, the operator must report usage of the override to Caterpillar Inc. within 60 days of activating the override. Failure to meet this reporting requirement may subject the operator to penalties under 40 CFR 1068.101. Caterpillar Inc. will in turn report override usage annually to the US EPA. Although submitted to Caterpillar Inc., the override usage reports are deemed to be submissions to the US EPA. Federal regulations prohibit submitting false information. The following information must be included in the report:

1) Contact name, mail and e-mail addresses, and telephone number for the responsible company or entity

2) A description of the emergency situation, the location of the engine during the emergency, and the contact information for an official who can verify the emergency situation (such as a county sheriff, fire marshal, or hospital administrator)

3) The reason for the activation of the override during the emergency situation, such as the lack of DEF, or the failure of an emission-related sensor when the engine was needed to respond to an emergency situation

4) The engine serial number (or equivalent)

5) A description of the extent and duration of the engine operation while the override was active, including a statement describing whether the override was manually deactivated (paused) after the emergency situation ended

The Usage Report may be sent via e-mail or regular mail to one of the following addresses:

Email :

Emissions_Compliance@cat.com

Regular Mail :

Caterpillar Inc.
P.O. Box 600
Mossville, Illinois 61552-0600
Attention : Emissions Compliance Manager

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