Kohler Generator Fault Codes and Specs for 12RES and 8.5RES Models
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Section 1 Features

1.1 Specifications

The generator set specification sheets provide specific generator and engine information. Refer to the spec sheet for data not supplied in this manual. Consult the generator set service manual, engine operation manual, and engine service manual for additional specifications. Obtain copies of the latest spec sheets, manuals, diagrams, and drawings from your local distributor/dealer.

1.2 Generator

The generator uses Kohler’s unique PowerBoostt voltage regulation system, which provides instant response to load changes.

PowerBoostt ensures reliable motor starting and consistent voltage levels. PowerBoostt utilizes a voltage excitation system that employs a winding independent of the main output windings to provide excitation voltage.

1.3 Engine

The generator set has a four-cycle, twin cylinder, air- cooled Kohlerr engine. The engine operates on clean-burning natural gas or propane (LP) vapor. Engine features include:

DEfficient overhead valve design and full pressure lubrication for maximum power, torque, and reliability under all operating conditions.

DDependable, maintenance-free electronic ignition.

DPrecision-formulated cast iron construction of parts subjected to the most wear and tear.

DField-convertible multi-fuel systems that allow fuel changeover from natural gas to LP vapor (and vice-versa) while maintaining CARB emission certification.

DDigital spark-advance module (DSAM) optimizes ignition timing for the selected fuel (12RES).

1.4 Advanced Digital Control

The generator set is equipped with the Kohlerr Advanced Digital Control (ADC 2100). Controller features include the following:

DCompact controller

DIntegrally mounted to the generator set

DLED display:

DRuntime hours

DCrank cycle status

DDiagnostics

DLED display communicates faults: D High battery voltage

D High engine temperature D Low battery voltage

D Low oil pressure D Overcrank safety D Overspeed

D Overfrequency D Overvoltage

D Underfrequency D Undervoltage

DMembrane keypad for configuration and adjustment D Password-protected user access to menus

D Voltage, gain, and speed adjustment

DSystem configuration (system voltage, phase, and frequency settings, battery voltage, and generator set model)

DMaster control switch: Run/Off-Reset/Auto

DRemote two-wire start/stop capability

DSuperior electronics protection from corrosion and vibration

DPotted electronics

DSealed connections

DDigital isochronous governor to maintain steady-state speed at all loads

DDigital voltage regulation: ±1.5% RMS no-load to full-load

DAutomatic start for programmed cranking cycle

TP-6331 5/04

Section 1 Features

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Contents Controller Advanced Digital Control ADC ModelsTP-6331 5/04 Controller Identification Product Identification InformationGenerator Set Identification Numbers Engine IdentificationTable of Contents Table of Contents TP-6331 5/04 Battery Safety Precautions and InstructionsAccidental Starting Exhaust System Engine Backfire/Flash FireHazardous Voltage/ Electrical Shock Fuel System Hazardous NoiseHot Parts Heavy EquipmentMoving Parts 246242 VI Safety Precautions and Instructions TPTPS-6331 5/04 Nameplate IntroductionEPA and California Emission Certification Service Assistance Specifications Generator FeaturesEngine Advanced Digital ControlGenerator Set Components Generator Set ComponentsOperation Prestart ChecklistExercising Generator Set Generator Set OperationStarting Generator Set Controls and IndicatorsStopping Generator Set Code Fault Description Check Fault ShutdownsResetting Controller after a Fault Shutdown Continuous Power ModeBattery Charger Operation Battery ChargerOperation TP-6331 5/04 Routine Maintenance Scheduled MaintenanceLubrication Service ScheduleLubrication System Oil Change ProcedureLow Oil Pressure Shutdown Oil CheckPrecleaner Service Air Cleaner Element and PrecleanerSpark Plugs Air Cleaner Components Paper Element ServiceCooling Air Intake and Exhaust Cooling SystemEZ-273000-J Circuit Protection Storage ProcedureCylinder Lubrication BatteryExterior Preparation Scheduled Maintenance TP-6331 5/04 Generator Set Troubleshooting TroubleshootingIntroduction Battery Charger Troubleshooting Fault CodesTroubleshooting Ansi Appendix a AbbreviationsISO Page By Kohler Co. All rights reserved

12RES, 8.5RES specifications

The Kohler 8.5RES and 12RES generators are known for their robust reliability and efficiency, making them ideal solutions for both residential and light commercial applications. These generators are equipped with advanced technologies that ensure seamless power delivery during outages, giving users peace of mind.

The Kohler 8.5RES, with its 8.5 kW output, is perfect for homeowners who require backup power for essential appliances and systems. It efficiently powers refrigerators, lights, and heating or cooling systems, providing convenience when the grid is down. The 12RES, delivering 12 kW, caters to larger homes or small businesses, accommodating additional loads such as sump pumps and electric dryers.

One of the standout features of these generators is the Kohler Command PRO engine, designed for maximum performance and longevity. This engine operates with low noise levels, ensuring that any power interruption goes unnoticed. Both models come with an innovative digital control panel that simplifies operation and monitoring, allowing users to access critical information at a glance.

The Kohler 8.5RES and 12RES are equipped with the patented Automatic Voltage Regulation (AVR) technology. This feature maintains a steady voltage output to protect sensitive electronics from damage caused by power surges. The modular design of these units facilitates easy maintenance, with service intervals and replacement parts readily available.

For eco-conscious consumers, the Kohler generators meet EPA emission regulations, ensuring a cleaner energy solution. The units also offer a comprehensive sound-attenuated enclosure, resulting in quieter operation, making them suitable for use in suburban environments.

Installation is straightforward, with various connection options for natural gas and propane fueling. Both models come with a fully automatic transfer switch, providing seamless transition from grid to generator power. This ensures that critical systems are always operational during outages.

In summary, the Kohler 8.5RES and 12RES generators stand out for their reliability, advanced technology, and user-friendly features. Their powerful engines, efficient performance, and low emissions make them an excellent choice for anyone looking to invest in a dependable backup power solution. Whether for home use or light commercial needs, these generators provide the essential peace of mind that comes with knowing you have power when you need it most.
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