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Kohler 20RESD - User Manual

Kohler 20RESD
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 20RESD

Questions and Answers

  • K
    kylecortezAug 20, 2025
    How to troubleshoot inadequate fuel supply in Kohler 20RESD?
    • R
      Rebekah HullAug 20, 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.
  • T
    tara90Aug 22, 2025
    Why is my Kohler 20RESD Portable Generator cranking but not starting properly?
    • R
      Richard DelacruzAug 22, 2025
      If your Kohler Portable Generator cranks but struggles to start, lacks power, or runs erratically, several factors could be at play. A clogged air cleaner can restrict airflow, so try cleaning or replacing it. Weak battery or poor battery connections can also cause these issues; recharge/replace the battery and ensure connections are clean and tight. Inspect the spark plug wires for secure connections. Insufficient fuel pressure could be the culprit, so verify the fuel supply and valves. Also, check the oil level and add oil if necessary, in case of a low oil pressure shutdown. If these steps don't resolve the problem, it might be due to engine malfunction, in which case you should contact an authorized Kohler distributor/dealer.
  • N
    Nancy CampbellAug 25, 2025
    What to do if my Kohler 20RESD does not crank?
    • J
      Jillian SmithAug 25, 2025
      If your Kohler Portable Generator isn't cranking, the issue could stem from several causes. First, check the battery; it might be weak or dead, requiring a recharge or replacement. Ensure the battery connections are correct and secure. If a fault shutdown occurred, check the controller display for fault messages and reset the controller after correcting the fault. Also, confirm the generator set is in the RUN or AUTO mode. Finally, check if the generator thermostat tripped and reset it.
  • S
    Stephanie SawyerAug 26, 2025
    How to fix no AC output on my Kohler 20RESD?
    • S
      Samantha KingAug 27, 2025
      If your Kohler Portable Generator has no AC output, start by checking the line circuit breaker to ensure it's in the ON position. If the breaker tripped, it might be due to an overload; reduce the load on the generator. If the breaker trips due to a short circuit or if the auxiliary winding circuit breaker tripped, contact an authorized Kohler distributor/dealer for service. If the auxiliary winding circuit breaker trips repeatedly, also contact an authorized Kohler distributor/dealer for service.
  • S
    stephanie11Aug 28, 2025
    What to do if my Kohler 20RESD Portable Generator stops suddenly?
    • J
      Jason CooleyAug 28, 2025
      If your Kohler Portable Generator suddenly stops, several factors could be responsible. Check for low oil pressure shutdown by looking for oil leaks and verifying the oil level. Ensure the generator isn't out of fuel. If an overcrank shutdown occurred, reset the controller. Also, check the controller display for fault messages, correct the fault condition, and reset the controller. Make sure the generator set is in the RUN or AUTO mode. Check the remote switch position or OnCue Plus in case of a remote stop command. If the auxiliary winding circuit breaker tripped, reset it. If the breaker trips repeatedly or if there is an engine malfunction, contact an authorized Kohler distributor/dealer.
  • N
    nvaldezAug 30, 2025
    Why does my Kohler 20RESD Portable Generator have low output voltage?
    • K
      Kyle BookerAug 30, 2025
      If your Kohler Portable Generator has low output or experiences an excessive voltage drop, it might be overloaded. Try reducing the load on the generator set.
  • J
    Jonathan MarquezAug 31, 2025
    Why is the controller display off on my Kohler Portable Generator?
    • M
      Melanie TaylorSep 1, 2025
      If the controller display on your Kohler Portable Generator is off, the cause might be low or no battery voltage. Check the connections and the generator set battery.
  • T
    Tonya LoveSep 2, 2025
    Why is the backlight off on my Kohler 20RESD Portable Generator's controller display?
    • G
      Gary ParkerSep 2, 2025
      The backlight on the Kohler Portable Generator controller display turns off after about 1 minute of inactivity. The backlight will turn on when a button is pressed or the generator set starts.
  • J
    Jessica SmithSep 6, 2025
    What to do if the breaker will not close in RUN on my Kohler 20RESD Portable Generator?
    • B
      Benjamin LewisSep 6, 2025
      If the breaker won't close in RUN on your Kohler Portable Generator, it could be due to: another breaker being closed (stop the other generator set), auto-discovery not being complete (initiate auto-discovery by ensuring this generator is in RUN mode and the other is stopped with the controller in OFF mode), or bus sensing not being connected correctly (check wiring between both generators and the Automatic Paralleling Module).
  • E
    Erika MaysSep 8, 2025
    Why does SiteTech indicate that both engines are under load, but the ATS has not transferred on my Kohler Portable Generator?
    • T
      Terri ClaytonSep 8, 2025
      If SiteTech indicates that both engines are under load but the ATS hasn't transferred on your Kohler Portable Generator, it could be due to the metering on either generator being backwards. To fix this, select a different model number for the affected generator, then re-select the correct model number. This clears the CT direction flag and allows the generators to re-determine CT direction.

Summary

Safety Precautions and Instructions

Accidental Starting

Details hazards and procedures to prevent unintended generator set startup.

Battery Safety

Covers safety precautions related to battery handling and acid.

Section 2 Scheduled Maintenance

2.1 Service Schedule

Outlines recommended maintenance tasks and intervals for the generator set.

2.2 Lubrication System Maintenance

Details maintenance procedures for the engine lubrication system, including oil checks and changes.

2.8 Battery Maintenance

Provides information on battery maintenance, cleaning, and checking electrolyte levels.

Section 3 Generator Reconnection

Section 4 Controller

4.4 Controller Parameters

Lists and describes adjustable parameters accessible via SiteTech or controller menus.

4.6 Controller Replacement Procedure

Details the procedure for replacing the generator set controller.

4.7 Controller Setup Instructions

Outlines the steps required to set up the controller after installation or replacement.

4.8 Voltage Calibration

Explains how to calibrate the generator set output voltage using the controller or SiteTech.

Section 5 Troubleshooting

5.9 Fuel System Troubleshooting

Guides troubleshooting of fuel system issues, focusing on pressure and regulator function.

5.10 Engine Hunting Troubleshooting

Provides a sequence for diagnosing and resolving engine hunting issues in 20 kW models.

5.11 Fault Messages

Lists and explains fault messages displayed by the RDC2 controller.

5.13 Troubleshooting Chart

Provides a table of common problems, causes, tests, and corrective actions.

5.14 Controller Troubleshooting Guide

Offers troubleshooting steps for specific controller display and communication issues.

5.15 Load Management Troubleshooting

Addresses issues related to the operation of load management devices.

Section 6 Component Testing and Adjustment

6.7 Voltage Adjustment Procedures

Covers adjustments for output voltage and voltage regulator settings.

6.8 Governor System Testing and Operation

Details the operation and testing of the governor system for engine speed control.

6.9 Frequency Adjustment Procedure

Explains how to adjust and verify generator output frequency.

6.10 Fault Shutdown Tests

Provides tests to verify the operation of various shutdown functions.

6.11 Fuel System Testing

Covers testing and maintenance of fuel system components.

Section 7 Disassembly;Reassembly

Section 8 Wiring Diagrams

Wiring Diagrams by Model and Controller Type

Lists schematic and wiring diagrams categorized by generator set model and controller type.

Kohler 20RESD Specifications

General IconGeneral
Model20RESD
TypePortable Generator
Rated Power20 kW
Starting SystemElectric Start
AC Output120/240V
Voltage120/240V
Frequency60 Hz
Fuel TypePropane/Natural Gas
EngineKohler
Engine Type4-Cycle
Running Watts20, 000 watts

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