Introduction - Kohler APM402 Operation

This manual provides operation instructions for 10 kW and larger generator sets equipped with the following controllers:

APM402 generator set controller

®
Decision-Maker
Note:
In 2018, Kohler adopted a global controller naming convention. To support this, the name of the Decision-Maker
has transitioned to APM402. The APM402 has the same form, fit and function as the Decision-Maker
same accessories.
Wiring diagram manuals are available separately. Refer to the engine operation manual for generator set engine scheduled
maintenance information.
Information in this publication represents data available at the time of print. Kohler Co. reserves the right to change this
publication and the products represented without notice and without any obligation or liability whatsoever.
Read this manual and carefully follow all procedures and safety precautions to ensure proper equipment operation and to avoid
bodily injury. Read and follow the Safety Precautions and Instructions section at the beginning of this manual. Keep this manual
with the equipment for future reference.
The equipment service requirements are very important to safe and efficient operation. Inspect the parts often and perform
required service at the prescribed intervals. Maintenance work must be performed by appropriately skilled and suitably trained
maintenance personnel familiar with generator set operation and service.
Abbreviations
This publication makes use of numerous abbreviations. Typically, the word(s) are spelled out along with the abbreviation in
parentheses when shown for the first time in a section. Appendix A: Abbreviations, also includes many abbreviation definitions.
SiteTech™ Software
Several instances in this manual refer to SiteTech™ software, which can be used for programming the APM402 or
3000 controller. SiteTech™ software is required for updating the controller application code (firmware), loading
®
Decision-Maker
personality profiles, and saving or loading controller configuration files. Contact your local distributor/dealer for assistance.
Note:
The APM402 controller uses different firmware than the Decision-Maker
®
Decision-Maker 3000 firmware on an APM402 controller, or vice-versa.
To determine the generator set controller software version, go to the Overview menu.
TP-6694 9/20
3000 generator set controller
®
3000 and supports the
®
3000 controller. Do not attempt to load

Introduction

®
3000 controller
13