Kohler 38RCLB - User Manual

Other manuals for Kohler 38RCLB

Operation76 pages

Questions and Answers

J
Joseph McfarlandAug 17, 2025
How to troubleshoot a Kohler Inverter when it does not crank?
- A
  ashley58Aug 18, 2025
  If your Kohler Inverter generator set does not crank, here are some things to check: * Recharge or replace the battery if it is weak or dead. * Check the battery connections to ensure they are properly connected. * Replace any blown fuses. If fuses blow repeatedly, contact an authorized Kohler distributor/dealer for service. * Ensure the generator set is turned ON by pressing the RUN button to start the engine or press AUTO to allow remote starting.
J
Jacqueline Burton DDSAug 20, 2025
Why does my Kohler Inverter have no AC output?
- J
  John KingAug 20, 2025
  If your Kohler Inverter has no AC output, make sure the AC circuit breaker is in the ON position. If the AC circuit breaker trips due to an overload, reduce the load on the generator set. If the breaker trips because of a short circuit, contact an authorized Kohler distributor/dealer for service.
K
Kelly StewartAug 22, 2025
What to do if my Kohler Inverter generator cranks but doesn't start?
- C
  Christina SullivanAug 22, 2025
  If your Kohler Inverter generator set cranks but doesn't start, starts hard, lacks power, or operates erratically, here's what you can do: * Check and clean or replace the air cleaner if it's clogged. * Recharge or replace the battery if it's weak or dead. * Clean and tighten the battery connections if they are poor. * Inspect the spark plug wires for loose connections. * Look for oil leaks and check the oil level, adding oil if necessary, in case of a low oil pressure shutdown. * Check the fuel supply and valves if the fuel pressure is insufficient. If these steps don't resolve the issue, it might be an engine malfunction, and you should contact an authorized Kohler distributor/dealer.
B
Brad GarciaAug 27, 2025
Why is there low output or excessive voltage drop on my Kohler Inverter?
- K
  Kaitlin GutierrezAug 27, 2025
  If you're experiencing low output or excessive voltage drop with your Kohler Inverter, it might be overloaded. Try reducing the load on the generator.
C
Christopher MorganAug 30, 2025
What causes the controller LCD display to be off on a Kohler Inverter?
- J
  Justin DyerAug 30, 2025
  If the controller LCD display on your Kohler Inverter is off, check the connections and the generator set battery for low or no battery voltage. See Figure 5-1.
F
fodonnellSep 1, 2025
What to do when there is loss of communication to accessory modules in my Kohler Inverter?
- K
  Karen KelleySep 1, 2025
  If you are experiencing a loss of communication to accessory modules on your Kohler Inverter, check the wiring and connections. Also, verify that the cable size and length of run comply with the instructions in the Installation manual. You may also need to check the battery connections and the generator set battery for low or no battery voltage. See Figure 5-1.
D
David BrownSep 4, 2025
Why are the load management relays not operating on my Kohler Inverter?
- T
  townsendbrookeSep 4, 2025
  If the load management relays on your Kohler Inverter do not operate, check the wiring and connections, ensuring that the cable size and length of run comply with the instructions in the Installation manual. Additionally, check the battery connections and the generator set battery for low or no battery voltage. See Figure 5-1.
J
jimmy60Sep 6, 2025
How to fix a flashing date on my Kohler Inverter?
- J
  Jonathan CortezSep 6, 2025
  To address a flashing date on your Kohler Inverter, check the battery connections (see Figure 5-1) and the utility power connection for the built-in battery charger. Then, reset the time, date, and exercise schedule as described in Section 2.5.7, Setting the Exerciser at Power-Up.
J
Jeremy JohnsonSep 9, 2025
Why are my Kohler Inverter fans operating in high-speed mode continuously?
- H
  Holly BergerSep 9, 2025
  If the fans in your Kohler Inverter are constantly running at high speed, there might be an issue with airflow blockage in the radiator and enclosure openings. Inspect these areas to ensure they are clear. Also, check the sensor function, wiring harnesses from the fuse/relay terminal block to the fans and controller for any damaged leads or terminations. Evaluate the relays for proper functionality and check the coil continuity. Finally, verify the transition at the specified threshold temperatures.
K
kelly59Sep 12, 2025
What to do if my Kohler Inverter is overheating and the fan does not transition to high-speed at the threshold temperature?
- H
  Haley CastanedaSep 12, 2025
  If your Kohler Inverter is overheating and the fan isn't switching to high speed when it should, begin by checking the sensor function. Next, inspect the wiring harnesses that run from the fuse/relay terminal block to the fans and controller, looking for damaged leads or terminations. Evaluate the relays to ensure they are working correctly. Check the continuity of the coil and confirm the transition at the threshold temperatures.

Summary

Safety Precautions and Instructions

Accidental Starting

Procedures to prevent accidental generator start-up and related hazards.

Battery

Hazards and safety measures for handling batteries, including acid and gases.

Engine Backfire;Flash Fire

Precautions against fire hazards from engine backfire or fuel system.

Exhaust System

Hazards of carbon monoxide and exhaust system safety.

Fuel System

Hazards of fuel vapors and safe handling procedures.

Hazardous Noise

Hazardous Voltage;Moving Parts

Hazards of electrical voltage and moving parts.

High voltage test

Connecting the battery and the battery charger

Heavy Equipment

Hot Parts

Hazards of hot engine and exhaust system components.

Service Assistance

Section 2 Scheduled Maintenance

2.1 General Maintenance

Routine Maintenance

2.2 Service Schedule

A detailed schedule of maintenance tasks and frequencies.

2.3 Lubrication System

2.3.2 Oil Check

2.3.4 Oil and Filter Change

Steps for changing engine oil and filter.

2.4 Air Cleaner

2.5 Exhaust System

2.6 Spark Plug

2.7 Battery

2.7.1 Checking Electrolyte Level

2.7.2 Checking Specific Gravity

2.8 Fuel System Maintenance

Section 3 Controller

3.3 Controller Parameters

3.4 Controller Firmware

3.5 Controller Replacement

Steps for replacing the RDC2 controller.

Controller Replacement Procedure

3.6 Controller Setup

Procedures for setting up the controller after installation.

3.7 Voltage Calibration

Procedures for calibrating generator voltage.

3.7.1 Calibration using the RDC2 Controller Keypad and Menus

3.7.2 Calibration Using SiteTech

3.8 Setting the OnCue Plus Password

Section 4 Cooling System

4.2 Inspecting the Cooling System

4.3 Cleaning the Radiator Fins and Inspecting the Hoses

4.5 Checking and Filling Coolant

4.6 Draining Cooling System

4.7 Flushing and Cleaning

4.8 Filling the Cooling System

4.10 Cooling Fans

4.10.1 Fan Operation

4.10.2 Fan Troubleshooting Guide

Troubleshooting steps for cooling fan issues.

Section 5 Troubleshooting

5.2 Theory of Operation, Electronic Start Sequence

5.3 Initial Checks

Basic checks to perform before troubleshooting.

5.4 Fuel System Troubleshooting

Troubleshooting common fuel system issues.

5.6 Fault Messages

List of fault messages and their meanings.

5.7 Status Messages

Displayed messages showing system status.

5.8 Generator Set Troubleshooting

Tables for troubleshooting generator set problems.

Generator set engine does not crank.

Troubleshooting steps for when the engine does not crank.

Generator set engine cranks but does not start.

Troubleshooting steps when the engine cranks but does not start.

Generator set engine starts hard.

Troubleshooting steps for hard engine starting.

Generator set stops suddenly.

Troubleshooting steps for sudden generator shutdown.

Generator set operates erratically

Troubleshooting erratic generator operation.

Generator set overheats

Troubleshooting generator overheating.

Generator set is noisy

High generator output voltage

Troubleshooting high output voltage.

Generator set lacks power

Troubleshooting generator power output issues.

Low output or excessive drop in voltage.

Troubleshooting low voltage output.

No AC output voltage.

Troubleshooting absence of AC output voltage.

5.9 Controller Troubleshooting

Specific troubleshooting for the RDC2 controller.

Section 6 Component Testing and Adjustment

6.1 Alternator Excitation Troubleshooting

Troubleshooting alternator excitation issues.

6.1.1 Low to No Voltage Operation

Diagnosing and resolving low or no voltage output.

6.1.2 Erratic Voltage Regulation

Troubleshooting variations in voltage regulation.

6.1.3 Overvoltage Condition

Diagnosing and resolving overvoltage conditions.

6.4 Voltage Adjustments

Procedures for adjusting generator voltage.

6.4.1 Voltage Adjustments Using SiteTech

6.4.2 Voltage Regulator Average Voltage Adjustment

Adjusting the average voltage output.

6.4.3 Volts;Hz Slope and Cut-In Frequency

6.4.4 Voltage Regulator Gain

6.5 Frequency Adjustment

Procedures for adjusting generator frequency.

6.5.1 Engine Speed Governor Settings

6.5.2 Hunting;Surging

6.6.1 Engine Compartment Air Temperature Sensor

6.7 Fuel Systems

6.7.1 Fuel Solenoid Valves

6.7.2 Checking the Fuel Pressure

6.7.3 Fuel Conversion Procedures

Section 7 Disassembly;Reassembly

7.2 Initial Steps

7.3 Enclosure Disassembly

7.4 Connection Box Disassembly

7.5 Alternator Disassembly

7.6 Engine Disassembly

7.7 Engine Reassembly

7.8 Alternator Reassembly

7.9 Connection Box Reassembly

7.10 Enclosure Reassembly

7.11 Final Steps

Section 8 Diagrams and Drawings

Kohler 38RCLB Specifications

General

Model	38RCLB
Type	Portable Generator
Voltage	120/240V
Frequency	60 Hz
Power Output	3800 watts
Rated AC Output	3800 watts
Emissions Compliance	EPA and CARB compliant