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Kohler 20RESCL - User Manual

Kohler 20RESCL
172 pages
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Residential/Commercial Generator Sets
Models:
14RESA/RESAL
20RESA/RESAL
20RESB
20RESC/RESCL
20RESD
Controllers:
RDC2 Controller
DC2 Controller
TP-6805 8/15b
Service

Table of Contents

Other manuals for Kohler 20RESCL

Questions and Answers

  • C
    courtney36Aug 7, 2025
    How to troubleshoot inadequate fuel supply in Kohler Portable Generator?
    • C
      Chris ScottAug 7, 2025
      Check for damaged primary or secondary fuel regulators, loose connections to the fuel solenoid valve, a damaged or closed fuel shutoff valve, an empty LP fuel tank, or other problems with the fuel supply. Check the fuel supply pressure to the generator set.
  • A
    Ashley ClineAug 12, 2025
    Why does my Kohler 20RESCL Portable Generator experience Main Power Overload Shutdown?
    • S
      Stephanie GilbertAug 12, 2025
      The Main Power Overload Shutdown is caused by an overcurrent condition on the DC power supply circuit. Check the crank, run, and flash relay circuits for short circuits. To address nuisance shutdowns, update the controller firmware to version 6.7 or higher.
  • O
    omartinezAug 17, 2025
    What to do if my Kohler Portable Generator shows a fault shutdown?
    • T
      Timothy HoustonAug 17, 2025
      If your Kohler Portable Generator displays a fault shutdown message on the controller, identify and correct the cause of the fault condition. Then, press the OFF button on the controller to clear the fault.
  • D
    Douglas JonesAug 21, 2025
    What to do if the thermostat tripped on my Kohler 20RESCL Portable Generator?
    • C
      Carl WadeAug 22, 2025
      If the thermostat trips on your Kohler Portable Generator, check for blocked air inlets and exhaust outlets. Then, follow the instructions to reset the thermostat.
  • S
    Stacie HesterAug 27, 2025
    How to fix engine hunting on Kohler 20RESCL models 20RESA(L) and 20RESC(L)?
    • L
      Loretta RossAug 27, 2025
      To address engine hunting in Kohler Portable Generator models 20RESA(L) and 20RESC(L), update to the most current version of firmware available. Also, install vent tubes on the two reference ports on the fuel regulator.
  • K
    Kevin WeeksSep 1, 2025
    What to do if my Kohler 20RESCL Portable Generator has an Over Crank fault?
    • J
      Jennifer PerkinsSep 1, 2025
      If your Kohler Portable Generator experiences an Over Crank fault, check the fuel supply, cranking circuit, and cranking battery. You may also need to troubleshoot the engine.

Summary

Safety Precautions and Instructions

Accidental Starting

Prevents unintended generator set operation, minimizing injury risk.

Battery Short Circuits

Hazards of short circuits and precautions to avoid them.

Engine Backfire;Flash Fire

Risks associated with engine backfire and servicing the fuel system.

Exhaust System

Safety concerning carbon monoxide and exhaust system integrity.

Fuel System

Precautions for handling fuel and preventing fires/explosions.

Hazardous Voltage;Moving Parts

Warnings about high voltage, moving parts, and electrical hazards.

Grounding Electrical Equipment

Importance of proper grounding to prevent electrocution.

Hot Parts

Warnings about hot engine and exhaust components during operation.

Service Assistance

Section 1 Specifications

Section 2 Scheduled Maintenance

2.1 Service Schedule

Details the maintenance tasks and their intervals.

2.2 Lubrication System

Covers oil checks, recommendations, and change procedures.

2.2.2 Oil Check

Procedure for checking the engine oil level.

2.2.4 Oil Change Procedure

Step-by-step instructions for changing the engine oil and filter.

2.8 Battery

General information and maintenance for the generator set battery.

2.8.1 Cleaning the Battery

Steps for cleaning battery terminals and cables.

2.8.2 Checking Electrolyte Level

Procedure for checking and refilling the battery electrolyte.

2.9 Fuel System Maintenance

Maintenance procedures for the fuel system, including leak checks.

Section 3 Generator Reconnection

Section 4 Controller

4.4 Controller Parameters

Lists and explains adjustable parameters for the generator set controller.

4.6 Controller Replacement

Step-by-step instructions for replacing the generator set controller.

4.7 Controller Setup

Procedures for setting up the controller after installation or replacement.

4.8 Voltage Calibration

Procedures for calibrating generator output voltage.

4.8.1 Calibration using the RDC2 Controller Keypad and Menus

Steps for calibrating voltage using the controller's interface.

4.8.2 Calibration Using SiteTech

Steps for calibrating voltage using SiteTech software.

Section 5 Troubleshooting

5.6 Emergency Stop Button

Operation and reset procedure for the emergency stop button.

5.9 Fuel System Troubleshooting

Guide to troubleshooting fuel system issues, focusing on pressure and regulators.

5.10 Troubleshooting Engine Hunting, 20 kW Models

Specific steps to diagnose and resolve engine hunting issues in 20 kW models.

5.11 Fault Messages

Lists fault messages, descriptions, and checks for the RDC2 controller.

5.13 Troubleshooting Chart

A quick reference table for diagnosing common generator set problems and their solutions.

5.14 Controller Troubleshooting

Specific troubleshooting guide for controller-related issues.

5.15 Troubleshooting Load Management Problems

Guide to troubleshooting issues with load management devices.

Section 6 Component Testing and Adjustment

6.2 Alternator Excitation

Troubleshooting steps for alternator excitation issues, including no or low voltage.

6.2.1 No to Low Voltage Operation

Diagnosing and resolving issues with no or low output voltage.

6.3 Stator

Procedures for testing stator continuity and resistance.

Stator Continuity and Resistance Tests

Steps for checking stator winding continuity and resistance.

6.4 Main Field (Rotor)

Procedures for testing the rotor for continuity, resistance, and shorts.

Rotor Test Procedure

Steps for testing the rotor's electrical integrity.

6.7 Voltage Adjustments

Methods for adjusting generator output voltage.

6.7.1 Voltage Regulator Average Voltage Adjustment

How to adjust the average output voltage using SiteTech or controller menus.

6.8 Governor System

Information on the governor system, operation, and initial checks.

6.8.3 Hunting;Surging

Troubleshooting steps for engine hunting or surging problems.

6.8.4 Governor System Operation Test

Procedure for testing the governor system operation.

6.9 Frequency Adjustment

Procedures for adjusting engine speed to set generator output frequency.

6.9.1 Engine Speed Gain Adjustment for the Governor

How to adjust governor gain to stabilize engine speed.

6.10 Fault Shutdown Tests

Procedures for testing various fault shutdown functions of the controller.

6.10.1 Controller Fault Shutdown Functions

Tests for overspeed, overcrank, and low oil pressure shutdowns.

6.10.2 Fault Shutdown Switches

Procedures for testing low oil pressure and high engine temperature shutdown switches.

6.11 Fuel Systems

Information on fuel system components, maintenance, and troubleshooting.

6.14 Continuity Checks

Procedures for checking component continuity using an ohmmeter.

Section 7 Disassembly;Reassembly

Section 8 Wiring Diagrams

Appendix C General Torque Specifications

Kohler 20RESCL Specifications

General IconGeneral
BrandKohler
Model20RESCL
CategoryPortable Generator
LanguageEnglish

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