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Kohler Generator Fault Code List

 

If you own a Kohler generator, you know how important it is to keep it in good working condition. One way to do this is to stay on top of any fault codes that may appear. Fault codes are diagnostic tools that help identify potential issues with your generator and can save you time and money in the long run. In this article, we will provide you with a comprehensive Kohler Generator Fault Code List and a table for each code’s warning/shutdown condition and suggested checks. By referring to this table, you can quickly identify any issues with your generator and take appropriate action to resolve them. 

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CodeWarning/ShutdownConditionPotential CausesRecommended TroubleshootingCheckNotes/Comments
AC Sens LossW (1 sec.) SD (3 sec.)AC sensing lost. In Auto mode, generator output AC sensing is lost. Detection begins 10 seconds after crank disconnectFaulty wiring or connection to AC sensing circuitCheck wiring and connections. Contact an authorized distributor/dealer for service if necessaryContact an authorized distributor/dealer for service 
Accy PwrOver W WarningWAccessory Power Overload. An over current fault (short circuit) on the accessory controller power outputShort circuit in the accessory controller power output wiringCheck wiring and connections. Contact an authorized distributor/dealer for service if necessaryContact an authorized distributor/dealer for service 
Alt ProtectSDHigh generator current has been detected. The generator set shuts down to protect the alternator from damage caused by overheating the windings (10RESV and 12RESV only)Overload on the generator setReduce the loadReduce the load10RESV and 12RESV only
ATS ComErrorWATS communication error. Warning is displayed if ATS interface connection is lost. See Section 2.5.3Communication wiring between transfer switch interface board and generator set is faultyCheck communication wiring between transfer switch interface board and generator setCheck communication wiring 
ATS PhaseRotWATS phase rotation mismatch. Transfer switch phase rotation does not match, ATS will not transfer.Incorrect ATS connection or wiringCorrect the ATS connection. Refer to the ATS Installation manual, wiring diagrams, and labels on the transfer switchCorrect the ATS connection 
Aux InputSDAuxiliary input. An optional customer-connected input is closed. (Digital input from optional PIM.)Faulty customer-supplied equipmentCheck customer-supplied equipmentCheck customer-supplied equipmentDigital input from optional PIM
Batt Chg FltWBattery charger fault. Input to PIM from an external battery charger (not the built-in battery charger)Faulty external battery chargerCheck external battery chargerCheck external battery chargerInput to PIM from an external battery charger
Battery HighWEngine starting battery voltage rises above 16 VDC for more than 10 seconds. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable levelFaulty battery or battery chargerCheck the battery rating and condition. Check the battery charger operation.Check battery and charger 
Battery LowWEngine starting battery voltage falls below 12.5 VDC for more than 90 seconds when the engine is not running. Not operative during the engine crank cycle. Clears when the battery voltage returns to an acceptable levelFaulty battery or battery chargerCheck the battery rating and condition. Check the battery charger operation. Charge or replace the batteryCheck battery and charger 
Battery CrLo WarningWEngine starting battery voltage falls below 11 Volts for more than 10 seconds. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable levelFaulty battery or battery chargerCheck the battery rating and condition. Check the battery charger operation. Charge or replace the batteryCheck battery and charger 
Eng Speed HighSDEngine speed exceeds 115% of the normal running speed for more than 0.3 seconds.Faulty engine control systemContact an authorized distributor/de  

How Do I Clear The Error Code On My Kohler Generator?

Clearing error codes on your Kohler generator is a relatively straightforward process. Once you have identified the fault code and taken the necessary steps to resolve the underlying issue, you can clear the code and reset your generator’s controller.

To clear an error code on your Kohler generator, follow these steps:

1. Press the “ENTER” button on the controller to access the menu.

2. Scroll down to “CLEAR CODES” and press “ENTER”.

3.The controller will display a message asking if you want to clear the codes. Select “YES” and press “ENTER”.

4. The controller will clear all active and inactive codes, and the screen will display a message confirming that the codes have been cleared.

It’s important to note that clearing error codes on your Kohler generator does not necessarily fix the underlying issue. If the same error code appears again after you have cleared it, you should take further steps to diagnose and resolve the issue.

Additionally, some error codes may be more serious than others and may require the attention of an authorized distributor or dealer. If you are unsure about how to clear an error code or have any concerns about your generator’s operation, it’s always best to seek professional assistance.

Kohler 20kW

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