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Kohler 18RES - User Manual

Kohler 18RES
100 pages
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Residential/Commercial Generator Sets
Models:
17RES/RESL/RESNT
18RES/RESL/RESNT/TRES
Controllers:
ADC-RES Advanced Digital Control
DC-RET Digital Control
TP-6519 8/17c
Service

Table of Contents

Other manuals for Kohler 18RES

Preview: Operation Guide
Operation Guide44 pages
Preview: Installation Manual
Installation Manual56 pages

Questions and Answers

  • M
    mark61Aug 6, 2025
    What to do if the green LED stays on when the battery is known to be low in my Kohler Inverter?
    • R
      Randy AndersenAug 7, 2025
      If the green LED on your Kohler Inverter stays on even when the battery is known to be low, it could be due to a few reasons. First, check for an open DC output fuse and replace the AGS-10 fuse if necessary. Second, inspect for faulty or contaminated terminal connections; clean, tighten, or repair all terminal connections. Finally, one or more cells could be damaged, so perform a load test on the battery and replace it if required.
  • T
    Theresa AndersonAug 12, 2025
    What to do if Kohler Power Supply generator set engine does not crank?
    • G
      Gina RubioAug 12, 2025
      If your Kohler Power Supply generator set engine doesn't crank, start by checking the battery connections and ensure they are correctly connected and tightened. A weak or dead battery could also be the culprit, so try recharging or replacing it. Inspect the engine and controller connections for open circuits, tightening any loose connections and replacing damaged harnesses or leads. Finally, check controller fuse F3 and replace it if blown; if it blows again, investigate the circuit and components.
  • J
    Julia GallegosAug 17, 2025
    What to do if there is inadequate fuel supply in Kohler 18RES Power Supply?
    • B
      brownhenryAug 17, 2025
      If you have inadequate fuel supply in your Kohler Power Supply, check for damaged primary or secondary fuel regulators and loose connections to the fuel solenoid valve. Also, inspect the fuel shutoff valve for damage or closure, verify that the LP fuel tank is not empty, and investigate any other potential issues with the fuel supply. Finally, check the fuel supply pressure to the generator set.
  • J
    josephcruzAug 21, 2025
    What to do if red and green LEDs stay on for more than 24 hours on my Kohler Inverter?
    • G
      garrettgutierrezAug 21, 2025
      If both the red and green LEDs on your Kohler Inverter stay on for more than 24 hours, it could be due to several reasons. First, onboard DC systems might be drawing between 1.5 and 5 amps; in this case, turn off all DC equipment while charging. Second, one or more cells could be damaged; you should load test the battery and replace it if necessary. Lastly, there might be extremely low AC voltage at the battery charger; try applying a higher AC voltage source or reducing the length of the extension cord.
  • R
    Ricky ValenzuelaAug 27, 2025
    What to do if the red LED stays on for more than 24 hours on my Kohler Inverter?
    • T
      Timothy TannerAug 27, 2025
      If the red LED on your Kohler Inverter remains on for more than 24 hours, there are a few potential causes. It could be due to one or more inoperative or damaged cells, in which case you should load test the battery and replace it if needed. Alternatively, the battery charger might have reduced its output voltage due to a DC overload or short; remove the source of the overload or short, disconnect the battery charger’s black (NEGATIVE) ring terminal from the battery, reapply AC power, and check if only the green LED lights up. Another possibility is that onboard DC systems are drawing more current than the battery charger can replace, so try turning off all DC equipment while charging.
  • S
    Sarah DavidsonAug 31, 2025
    How to fix no LED lights on my Kohler Inverter when AC power is applied?
    • T
      Tammy RobertsonAug 31, 2025
      If neither of the LEDs on your Kohler Inverter turn on when AC power is applied, it could be due to two main reasons. First, there might be no AC power available at the battery charger; connect AC power or reset the AC breaker on the main panel. Second, there could be a component failure, which would require replacing the battery charger.

Summary

Safety Precautions and Instructions

Accidental Starting Hazards

Procedures to prevent accidental generator start and associated hazards.

Battery Hazards

Warnings and procedures for handling battery acid and preventing explosions.

Engine Backfire, Fuel, and Exhaust Hazards

Hazards related to engine backfire, fuel vapors, exhaust fumes, and carbon monoxide.

Hazardous Noise, Voltage, and Moving Parts

Dangers of hazardous noise, high voltage, moving parts, and electrical hazards.

Heavy Equipment and Hot Parts Safety

Section 1 Specifications

Section 2 Scheduled Maintenance

Routine Maintenance and Service Schedule

Guidelines for performing regular maintenance based on hours, conditions, and intervals.

2.2 Lubrication System Maintenance

Battery Hazards and Battery Charger

Hazards of battery gases/short circuits and information on the battery charger.

Section 3 Troubleshooting

3.3 Troubleshooting Chart

A table listing common problems, causes, tests, and corrective actions.

Engine Cranking and Starting Issues

Troubleshooting steps for engine not cranking, cranks but no start, and hard starting conditions.

Starting and Engine Operation Problems

Troubleshooting for engine start failures, hard starting, and units that shut down after starting.

Shutdown and Sudden Stop Issues

Troubleshooting for generator sets that stop suddenly or shut down unexpectedly.

Erratic Operation and Overheating Issues

Troubleshooting steps for unstable operation, erratic behavior, and overheating.

Erratic Operation, Overheating, and Noise

Troubleshooting for erratic performance, overheating, and noisy operation.

Engine Power Loss and Low Voltage Issues

Troubleshooting for reduced engine power and low output voltage.

No Output Voltage Issues

Troubleshooting steps for a complete lack of AC output voltage.

3.4 Controller Troubleshooting

Specific troubleshooting procedures for controller-related problems.

Section 4 Controller

4.3 Sequence of Operation

4.4 Faults: Warnings and Shutdowns

Overview and identification of warning and shutdown fault codes.

Fault Code Details

Detailed list of fault codes, descriptions, checks, and associated sections.

4.5 Controller Configuration and Adjustments

Procedures for configuring, adjusting, and timing the ADC-RES controller.

4.8 Silicon Controlled Rectifier (SCR) Module

4.9 Controller Replacement

Procedure for replacing the controller and verifying settings.

Controller and Logic Board Replacement

Section 5 Component Testing and Adjustment

5.1 Theory of Operation and 5.2 Separate Excitation

5.3 Stator Testing

5.4 Rotor Testing

5.7 Voltage Connections and 5.8 Voltage Adjustment

5.8.1 Voltage Adjustment Procedure

5.8.2 Volts per Hertz (Hz) Adjustments (Droop)

5.9 Governor System Operation and Checks

5.9.4 Governor System;Magnetic Pickup Test

5.9.5 Frequency Adjustment

5.10 Fault Shutdown Tests

Tests to verify the operation of overspeed, overcrank, and LOP shutdown functions.

5.10.2 Fault Shutdown Switches Testing

5.11 Master Switch and 5.12 Fuel Systems

Section 6 Disassembly;Reassembly

Stator, Rotor, and Generator Adapter Removal

Stator, End Bracket Installation, and Skid Mounting

Exhaust System Installation and Lead Connections

Section 7 Wiring Diagrams

Kohler 18RES Specifications

General IconGeneral
Power Output18 kW
Voltage120/240 V
Frequency60 Hz
Dimensions36.5 x 24.5 x 28.5 inches
Weight510 lbs
Fuel TypeNatural Gas or Propane
PhaseSingle
Noise Level68 dBA at 23 feet
EngineKohler
Starting SystemElectric Start
Sound Level68 dBA at 23 feet

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