Kohler 38RCL User Manual (English)

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Questions and Answers:

Edward CruzSep 9, 2025

What to do if individual Kohler Inverter fan is not operating?

M
Michael JohnstonSep 9, 2025
If a single fan in your Kohler Inverter isn't working, begin by checking the fan fuses. Then, inspect the fan for any obstructions and make sure the fan blades can rotate without any issues. Check the fan motor for an open coil (continuity). Inspect the harnesses from the fuse/relay terminal block to the fans and controller for damaged leads or terminations. Evaluate the relays for proper functionality and check for transition at threshold temperatures.

Brand	Kohler
Model	38RCL
Category	Inverter
Language	English

Brand

Kohler

Model

38RCL

Safety Precautions and Instructions

Accidental Starting and Battery Safety

Covers risks of accidental starting and battery handling precautions.

Engine and Fuel System Hazards

Addresses engine backfire, fuel spills, and exhaust system safety.

Electrical and Mechanical Hazards

Details dangers of high voltage, moving parts, and short circuits.

Operational and Specific Component Safety

Covers safe practices for testing, welding, and handling heavy equipment.

Hot Parts and General Notices

Warns about hot components and provides general notices.

Introduction

List of Related Materials

Lists and provides part numbers for related manuals and literature.

Service Assistance

Contact Information and Support

Provides contact details for Kohler Power Systems support and service locations.

Section 1 Specifications

Introduction to Specifications

Overview of specification sheets and references to related manuals.

Controller and Engine Specifications

Details controller specifications and engine types, referencing service manuals.

Alternator Specifications

Lists alternator details including manufacturer, exciter, and insulation.

Service Views and Component Locations

Illustrates generator set components and their locations.

Section 2 Scheduled Maintenance

General Maintenance and Service

Covers general maintenance, engine/generator set service, and parts acquisition.

Service Schedule Overview

Details maintenance tasks and their intervals for the generator set.

Lubrication System Maintenance

Covers oil specifications, checks, and oil/filter change procedures.

Air Cleaner, Exhaust, and Ignition Systems

Procedures for air cleaner, exhaust system inspection, and ignition system service.

Battery and Fuel System Maintenance

Covers battery care, specific gravity checks, and fuel system maintenance.

Section 3 Controller

Introduction to Controller and Software

Overviews controller function, SiteTech software, and USB connection.

Controller Parameters and Settings

Details controller parameters, their groups, and settings visible in SiteTech.

Controller Firmware and Replacement

Guides on updating firmware and procedures for replacing the controller.

Controller Setup Procedures

Outlines methods for setting controller parameters after installation.

Voltage Calibration and OnCue Password

Procedures for calibrating voltage and setting the OnCue password.

Section 4 Cooling System

General Cooling System Overview

Introduces the engine cooling system, components, and safety warnings.

Radiator, Hoses, and Thermostat Maintenance

Covers cleaning radiator fins, inspecting hoses, and thermostat details.

Coolant Checks and System Draining

Details coolant inspection, filling, draining, flushing, and cleaning procedures.

Filling System and Pressure Cap

Instructions for filling the cooling system and information on the pressure cap.

Cooling Fans Operation and Troubleshooting

Explains fan operation based on temperature and provides a troubleshooting guide.

Section 5 Troubleshooting

Introduction and Start Sequence Theory

Overviews troubleshooting, theory of electronic start sequence, and initial checks.

Circuit Protection and Fuel System Issues

Addresses circuit protection, fuses, and fuel system troubleshooting steps.

Controller Access and Fault Messages

Details controller service access and lists RDC2 controller fault messages.

System Status Messages and Generator Troubleshooting

Explains status messages and provides comprehensive tables for generator set and controller troubleshooting.

Section 6 Component Testing and Adjustment

Alternator Excitation Troubleshooting

Covers low/no voltage, erratic regulation, overvoltage, and LED optic board testing.

Voltage, Frequency, and Switch Adjustments

Details voltage adjustments, frequency settings, and generator set switch testing.

Fuel System Testing and Conversion

Explains fuel system components, pressure checking, and fuel conversion procedures.

Section 7 Disassembly/Reassembly

Initial Steps and Safety Precautions

Outlines initial steps before disassembly and emphasizes safety.

Enclosure, Connection Box, and Component Removal

Details procedures for removing enclosure panels, connection box, and other components.

Alternator Removal and Service

Provides information on the alternator components and references its service manual.

Kohler 38RCL User Manual

Table of Contents