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Kohler Fault Codes

205 Kohler generator fault/alarm codes with symptom, cause and remedy — compiled from Kohler service and controller documentation.

Fault / alarm codes

205
CodeMeaning / symptomCauseRemedy Models affected
000The 'AUT' pictogram is flashing, and the generating set stops unexpectedly.Pressing the 'STOP' button will stop the generating set immediately in general fault mode. The general fault LED will light up flashing and the following message will appear: 000 010 represents a fault code. Refer to the list of fault codes in Section 4.4.Kohler DEC 1000
0031Oxygen Sensor Heater Circuit High VoltageKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0032Oxygen Sensor Heater Circuit Low VoltageKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
010The generating set stops immediately when pressing the emergency stop button.Acknowledge (reset) the fault by moving the key switch to OFF, waiting for the 'ON' LED to go out completely and then moving the key switch to ON.Kohler DEC 1000
0107Manifold Absolute Pressure Sensor Circuit Low Voltage or OpenKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0108Manifold Absolute Pressure Sensor Circuit High VoltageKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0112Intake Air Temperature Sensor Circuit Low VoltageKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0113Intake Air Temperature Sensor Circuit High Voltage or OpenKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0117Coolant/Oil Temperature Sensor Circuit Low VoltageKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0118Coolant/Oil Temperature Sensor Circuit High Voltage or OpenKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0122Throttle Position Sensor Circuit Low Voltage or OpenKohler CV26, Kohler CV735, Kohler CV745, Kohler ECH940, Kohler ECH980, Kohler ECV630
0123Throttle Position Sensor Circuit High VoltageKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0131Oxygen Sensor 1 Circuit Low VoltageKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0132Oxygen Sensor 1 Circuit High VoltageKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0171Maximum Adaptation Limit ExceededKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0172Minimum Adaptation Limit ExceededKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0174Lean Fuel Condition at High Load (Open Loop)Procédure d'apprentissage du TPS incorrecteKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0201Injector 1 Circuit MalfunctionKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0202Injector 2 Circuit MalfunctionKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0230Fuel Pump Module Circuit Low Voltage or OpenKohler ECH940, Kohler ECH980, Kohler ECV940, Kohler ECV980
0232Pompe à carburant - Circuit haute tensionKohler ECH940, Kohler ECH980
0336Capteur de position du vilebrequin - Signal bruyant du capteur de position du vilebrequinKohler ECH940, Kohler ECH980
0337Capteur de position du vilebrequin - Aucun signal du capteur de position du vilebrequinKohler ECH940, Kohler ECH980
0351Bobine d'allumage - Défaillance de la bobine d'allumage, cylindre 1Kohler ECH940, Kohler ECH980
0352Bobine d'allumage - Défaillance de la bobine d'allumage, cylindre 2Kohler ECH940, Kohler ECH980
0562Tension du système - Basse tension du systèmeKohler ECH940, Kohler ECH980
0563Tension du système - Haute tension du systèmeKohler ECH940, Kohler ECH980
057-243ISSUE: 6Kohler se7310, Kohler se7320
0650Témoin d'anomalie du circuit - Témoin d'anomalie du circuitKohler ECH940, Kohler ECH980
1PARADA DE EMERGENCIA*Adjust the low idle speed screw, then adjust the low idle fuel needle.Kohler Command 11, Kohler Command 12.5, Kohler Command 14, Kohler FR II, Kohler KT17, Kohler KT21
1--23Local display shows chgr1/2 val 1--23 error.Kohler TP-6200
10PREAL., ALTA TEMP. MOTOR*Kohler FR II
1001Low Water EmergencyKohler FR II
1002Auxiliary FaultKohler FR II
1003Pre-Alarm High Engine TemperatureKohler FR II
11PREAL., BAJA PRES. ACEITE*Kohler FR II
12BAJA TEMP. AGUA*Kohler FR II, Kohler G-292806
12VDC +12VDC +Kohler FR II, Kohler FR1, Kohler G-292806
13BAJO VOLTAJE BAT.*Kohler FR II
14FALLA CARG. BAT.*Kohler FR II
15COMBUST. BAJO*Kohler FR II
16FALLA COMUNKohler FR II
1693Sortie tach (microprocesseur) - Circuit tach basCâble tach défectueux (à la terre). Court-circuit à la masse du circuit GCU.Kohler ECH940, Kohler ECH980
1694Sortie tach (microprocesseur) - Circuit tach hautErreur du circuit du microprocesseur ou GCU.Kohler ECH940, Kohler ECH980
2AUXILIAR*Readjust main fuel screwKohler Command 11, Kohler Command 12.5, Kohler Command 14, Kohler FR II, Kohler KT17, Kohler KT21
26AUXILIARY - AUX.Kohler G-292806
3SOBREARRANQUE*Turn main fuel adjustment 1/4 turn counterclockwiseKohler Command 11, Kohler Command 12.5, Kohler Command 14, Kohler FR II, Kohler KT17, Kohler KT21
32High Coolant TemperatureRelacionado con el haz de cables del motor: Conectores o cableado del circuito de patillas. Patilla 20. Relacionado con el sensor de oxígeno: Problema con el cableado o el conector del sensor. Sensor contaminado o dañado. Sensor por debajo de la temperatura mínima de funcionamiento (375 °C/709 °F). Ruta de conexión a masa del sensor al motor deficiente (el sensor se conecta a masa a través del revestimiento, ver la sección Sensor de oxígeno).Kohler FR II, Kohler FR1, Kohler G-292806, Kohler LH775, Kohler TP-6356
32AEmergency StopReset the emergency stop switch.Kohler TP-6356
35LOW WATER TEMPKohler FR II, Kohler FR1, Kohler G-292806
36HIGH ENG. TEMPKohler 10RFOY, Kohler 10ROY, Kohler 15RFOY, Kohler 15ROY, Kohler 6RFOY, Kohler 6ROY
38SPEED PREALKohler 10RFOY, Kohler 10ROY, Kohler 15RFOY, Kohler 15ROY, Kohler 6RFOY, Kohler 6ROY
39OVERSPEED - OS.Kohler G-292806
4SOBREVELOCIDAD*Readjust speed then idle fuel screw if neededKohler Command 11, Kohler Command 12.5, Kohler Command 14, Kohler FR II, Kohler KT17, Kohler KT21
40Pre High Coolant Temp.Kohler FR II, Kohler FR1, Kohler G-292806, Kohler TP-6356
41Pre Low Oil PressureCheck and adjust oil level or replace oil pump.Kohler FR II, Kohler FR1, Kohler G-292806, Kohler K141, Kohler K161, Kohler K181
48Emergency StopKohler G-292806, Kohler TP-6356
5BAJA PRES. ACEITE*Kohler FR II
503Engine Over SpeedReduce engine load or check for mechanical issues.Kohler APM804, Kohler KD700-KD4000
56AIR DAMPER - A.D.Kohler G-292806
6ALTA TEMP. MOTOR*Kohler FR II
60SYSTEM READYKohler FR II, Kohler FR1, Kohler G-292806
601Generator Over TemperatureCool down generator and monitor temperature.Kohler APM804, Kohler KD700-KD4000
61FALLA DEL CARGADOR DE BATERIAKohler FR II
62Low Battery VoltsKohler FR II, Kohler TP-6356
6269016Anomaly CodeKohler ECH940, Kohler ECH980
63Low FuelRefuel the generator set.Kohler TP-6356
7SISTEMA LISTO*Kohler FR II
72OverspeedKohler 7CCFKM, Kohler 7CCKM
794High Temperature Sensor ActivationReplace thermostat if function is questionable or defectiveKohler LH775
80SW. NOT IN "AUTO"Kohler FR II, Kohler FR1, Kohler G-292806
812VCC+REGISTRO TIRO DE AIRE*Kohler FR II
9NO ESTA EN AUTOM.*Kohler FR II
90High Temperature Sensor ActivationReplace thermostat if function is questionable or defectiveKohler LH775
AAccidental Starts!Before servicing the engine or equipment, always disconnect the spark plug lead to prevent the engine from starting accidentally. Ground the lead to prevent sparks that could cause fires.Kohler Command 11, Kohler Command 12.5, Kohler Command 14
AFInput from a customer-supplied switch that closes when the fault is active. The generator set shuts down and will not start when the fault is active (input is grounded).Not used on RES models.Check the cause of the auxiliary fault.Kohler 12RES, Kohler 12TRES, Kohler 17RES, Kohler 17RES/18RES, Kohler 18RES, Kohler 18TRES
AUTOAUTOKohler FR II, Kohler FR1, Kohler G-292806
Acc. 23-DAcc. 23-D timer contact does not open during the set exercise periodKohler Series S340
Acc. 26-DArea Protection Control initiates closing of the engine starting contactKohler Series S340
Auxiliary faultAuxiliary faultKohler 10ERG, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ, Kohler 32EOZ, Kohler G2
BElectrical Shock!Never touch electrical wires or components while the engine is running. They can be sources of electrical shock.Kohler Command 11, Kohler Command 12.5, Kohler Command 14
Battery Low WarningsLow battery voltage warnings are displayed on the controller display.Check the battery connections and ensure they are secure. Replace the battery if it is low on charge.Kohler 14RCA, Kohler 20RCA, Kohler RCA
BusDeadLiveThe bus is measured to be dead when one of the generators is supposed to be supplying voltage to the bus (closed contactor).Bus metering V9A and V9B connections to V9 of paralleling protection harness are connected incorrectly.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
BusLiveDeadThe bus is measured to be live when no generators are connected to it (both contactors open).Bus metering V9A and V9B connections to V9 of paralleling protection harness are connected incorrectly.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
CLethal Exhaust Gases!Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area.Kohler Command 11, Kohler Command 12.5, Kohler Command 14
CfgModelNumThe two generators that are intended to be paralleled have incompatible model numbers.Incorrect configuration of one of the generators. Different generator types. The paralleled generator sets must be the same kW model. (i.e. two 14 kW or two 20 kWor 26 kW models).Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
CfgSysVoltThe system voltage of the two generators intended to be paralleled is not the same.One of the two generators is incorrectly configured. Intermittent connections on RBUS network wiring.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
ConCheckFailFailure to Auto-Discover APM connections.Wires 9A and 9B crossed between the generators. Wires 9A or 9B not connected.Kohler 14RCA, Kohler 14RCA/L, Kohler 20RCA, Kohler 20RCA/L, Kohler 26RCA, Kohler 26RCA/L
ConNotDetermAPM connection auto-discovery is not complete. This means that the generator does not know which contactor is connected to it.Generators not yet started in RUN with other generator in OFF. See the APM instruction sheet for instructions to perform the auto-discovery procedure.Kohler 14RCA, Kohler 14RCA/L, Kohler 20RCA, Kohler 20RCA/L, Kohler 26RCA, Kohler 26RCA/L
ContactorOkSuccessful auto-discovery of APM connections.Auto-discovery was activated by placing other generator in OFF and this generator in RUN.Kohler 14RCA, Kohler 14RCA/L, Kohler 20RCA, Kohler 20RCA/L, Kohler 26RCA, Kohler 26RCA/L
CoolntTemp 0Coolant temperature is extremely high.Check coolant level. Check radiator and fans for obstruction. Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
CoolntTemp 3The ECM reported a problem with the coolant temperature sensor reading: 3 = high voltage.Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
CoolntTemp 4The ECM reported a problem with the coolant temperature sensor reading: 4 = low voltage.Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
CoolntTemp 5The ECM reported a problem with the coolant temperature sensor reading: 5 = open circuit.Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Crank LostCrankshaft Position Sensor (CPS) timeout error occurred.Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Current A High WarningOver Current ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
DCB1Relé de falla común DCB1Llene el sistema de enfriamiento antes de encender el calentador de bloque. Ponga en marcha el motor hasta que este se caliente y llene el radiador para purgar el aire del sistema antes de energizar el calentador de bloque.Kohler 25CCL, Kohler 30CCL, Kohler 36CCL
DCB2Relé de falla común DCB2Kohler 25CCL, Kohler 30CCL, Kohler 36CCL
ED0053030050Warning YELLOW light turn onEngine ECU has detect a malfunctionsContact KOHLER authorised workshopsKohler KDI 3404 TCR
ESEEngine Stop EventKohler SH255, Kohler SH255, SH265, SH270, Kohler SH265, Kohler SH270
Emerg StopThe emergency stop switch has been activated, or there has been an open circuit in the wiring.Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Eng Speed HighEngine speed exceeds 115% of the normal running speed for more than 0.3 seconds.Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Eng Speed LowEngine speed drops below 85% of the normal running speed for more than 3 seconds.Reduce the load by turning off appliances. Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
ErraticSigThe power metering on this controller gives a signal that is not consistent with the system configuration. Reversing the power direction does not resolve the problem.Bad wiring to the CT. Too much tension on wires from the CT to the controller.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
Exer Not SchExercise Not Scheduled. No exercise has been scheduled on the RDC2 controller.See Section 2.5 for instructions to set the exerciser.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
F01Error code F01Corrective action not statedKohler KD83V16
F02Low Oil PressureCheck oil level and condition. Replace oil if necessary.Kohler KD62V12, Kohler KD83V16
F1Generator will not start when power fails or with test switch depressed.Check generator. YES Jumper main logic board terminals 57 and 58. Does generator start? NO Check wiring harness to contactor. YES Jumper main logic board terminals 57 and 59. Does generator start? NO Is jumper installed between 58 and 59? YES NO Remove TDES and wait 30 seconds. Is there continuity between terminals 1 and 7 on the TDES relay?Kohler S340 Logic Board
F13High Coolant TemperatureReduce load or allow engine to cool down. Check coolant level and condition.Kohler KD62V12
F14Low Coolant LevelAdd coolant to proper level.Kohler KD62V12
Frequency HighGoverned frequency exceeds 110% of the system’s frequency setpoint for more than 10 seconds.Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Frequency High WarningOver Frequency ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
Frequency LowGoverned frequency falls below 90% of the system frequency setting for more than 10 seconds, or 1 Hz below the system frequency setting for more than 60 seconds.Reduce the load by turning off appliances and restart the generator set. Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Frequency Low WarningUnder Frequency ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
HBFault code is displayed if the engine starting battery voltage rises above 16 VDC for a 12 VDC system or above 30 VDC for a 24 VDC system for more than 10 seconds when the engine is not running. This fault condition does not inhibit engine starting.Fault code is displayed if the engine starting battery voltage rises above 16 VDC for more than 30 seconds when the engine is running. Not operative during the engine crank cycle, this fault condition does not inhibit engine starting.Check the battery rating and condition. Check the battery charger operation.Kohler 10/13/15ERG, Kohler 10ERG, Kohler 12RES, Kohler 12TRES, Kohler 13ERG, Kohler 15ERG
HEShutdown occurs if the engine coolant temperature exceeds the maximum temperature for more than 5 seconds. This protective becomes active after the engine reaches the crank disconnect speed.Shutdown occurs if the engine coolant temperature exceeds the maximum temperature for more than 5 seconds. This function becomes active after the engine reaches the crank disconnect speed.Check for blocked air inlets and exhaust outlets.Kohler 12RES, Kohler 12TRES, Kohler 17RES, Kohler 17RES/18RES, Kohler 18RES, Kohler 18TRES
HESTHigh Exhaust System TemperatureKohler se7310, Kohler se7320
HETHigh Engine Temperature (HET) ShutdownNormally open K1 contacts (F) close and fault lamp lights. Normally—closed K1 contacts (G) open to de-energize engine components. Generator shuts down.Kohler 10C, Kohler 10CC, 12CC Mobile Generator Set, Kohler 10CFC, Kohler 10CFZ, Kohler 10CZ, 12CZ Mobile Generator Set, Kohler 10RFOY
High battery voltageHigh battery voltageKohler 10ERG, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ, Kohler 32EOZ, Kohler G2
High engine temperatureEngine runtime, hoursKohler 10ERG, Kohler 12RES, Kohler 18RES, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ
IAT High 1Engine manifold air temperature is too high.Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
IAT Volt LoThe ECM reported an Engine Air Temperature/Manifold Absolute Pressure Sensor (TMAP) error.Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
K1 relay LEDEngine Run RelayKohler 7CCFKM, Kohler 7CCKM
K2 relay LEDEngine Crank RelayKohler 7CCFKM, Kohler 7CCKM
K3 relay LEDAC Crank Disconnect RelayKohler 7CCFKM, Kohler 7CCKM
K4 relay LEDFault Shutdown RelayKohler 7CCFKM, Kohler 7CCKM
K5 relay LEDTime Delay Control (Start/Run)Kohler 7CCFKM, Kohler 7CCKM
KA-01-BTime Delay on Transfer from Normal to EmergencyKohler S340 Logic Board
KA-02-ATime Delay on Engine StartingKohler S340 Logic Board
L.F.Low FuelKohler Fast Response, Kohler Kohler Control Fast Response I
LBFault code is displayed if the engine starting battery voltage falls below 8 VDC for a 12 VDC system or below 16 VDC for a 24 VDC system for more than 10 seconds when the engine is not running. This fault condition does not inhibit engine starting.Check the battery rating and condition. Check the battery charger operation.Charge or replace the battery.Kohler 10/13/15ERG, Kohler 10ERG, Kohler 12RES, Kohler 12TRES, Kohler 13ERG, Kohler 15ERG
LOPShutdown occurs if a low oil pressure condition exists 7 seconds after the engine has reached crank disconnect speed.Note: The low oil pressure shutdown does not protect against low oil level. Check the oil level at the engine. Check for leaks in the lubrication system.Check the oil level and add oil if the level is low.Kohler 10C, Kohler 10CC, 12CC Mobile Generator Set, Kohler 10CFC, Kohler 10CFZ, Kohler 10CZ, 12CZ Mobile Generator Set, Kohler 10RFOY
LOWTLow Water TemperatureKohler 10RFOY, Kohler 10ROY, Kohler 15RFOY, Kohler 15ROY, Kohler 6RFOY, Kohler 6ROY
LWLLow Water Level (LWL) ShutdownNormally open K1 contacts (F) close and fault lamp lights. Normally—closed K1 contacts (G) open to de-energize engine components. Generator shuts down.Kohler 10RFOY, Kohler 10RFOZ, Kohler 10ROY, Kohler 10ROZ, Kohler 15RFOY, Kohler 15RFOZ
Lo Crank VltLow cranking voltage. Battery voltage falls below 60% of system battery voltage for more than 6 seconds while the starter is engaged.Charge or replace the battery.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Locked RotorNo engine rotation is sensed during cranking. Shuts down 3 seconds after the fault is detected.Check the battery. Check for loose connections. Check for obstruction of alternator or engine. Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Locked rotorThe generator set also shuts down on OC if no engine rotation is sensed during cranking. Shuts down 3 seconds after the fault is detected.Kohler 12RES, Kohler 12TRES, Kohler 17RES, Kohler 17RES/18RES, Kohler 18RES, Kohler 18TRES
Loss of coolantSeawater pump impeller failure shutdownKohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ, Kohler 32EOZ, Kohler G2
LossOfComAPMThe Automatic Paralleling Module has stopped communicating on RBUS. (An APM was detected on the RBUS network but is no longer communicating).APM is unplugged. Primary controller is powered down. Check the battery connections. See previous page for more information. Intermittent connections on RBUS network wiring.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
LossOfComm2The primary controller has lost communication with the secondary controller. (A secondary controller was detected, then communication was lost.)RBUS disconnected, secondary controller battery disconnected, updating firmware in secondary controller, or intermittent RBUS connections.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 14RES, Kohler 20 kW Models, Kohler 20RCA
LossOfFieldThis generator has absorbed more than 25% reactive power (magnetic excitation current) for 20 seconds.Generator voltage on this generator is not calibrated correctly. Generator voltage on other generator is not calibrated correctly. Bus voltage on this generator is not calibrated correctly. Bus voltage on the other generator is not calibrated correctly.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
Low battery voltageCrank cycle statusKohler 10ERG, Kohler 12RES, Kohler 18RES, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ
Low oil pressureLow oil pressure shutdownKohler 10ERG, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ, Kohler 32EOZ, Kohler G2
M3.212APM INTERNAL power BATTERY WARNINGKohler APM802, Kohler KD1000, Kohler KD1350, Kohler KD1500, Kohler KD2500, Kohler KD800
Main Power Overload ShutdownThe generator shuts down due to a main power overload.Check the circuit breaker and ensure it is not tripped. If necessary, replace the circuit breaker.Kohler 14RCA, Kohler 20RCA, Kohler RCA
MainPwrOverLMain power overload. An over current fault on the 70 controller power output (short circuit).Check for shorted run relay. Check wiring for short circuits. Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Maint Req’dEngine maintenance is due.Check the maintenance schedule in the operation manual for tasks such as changing the oil, spark plugs or the air filter.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
MeterUnknownThis generator does not know if the metering is connected or the orientation of the connection. This means that the generators can’t share load accurately until this information is known.System commissioning and startup not yet complete. See the APM instructions.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
MeteringOkThe generator has verified that the metering is connected correctly and that the direction is consistent with expected power direction.Status message indicates that the CT is connected to the generator correctly.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
NoCurrentThe generator has applied load (using the other generator) and has observed no current on the power sensing inputs.The CT is not connected to the controller. The output leads from the generator do not go through the CT in the correct direction. See the APM instructions.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
Not in AutoThe generator set is not in Automatic (standby) mode. Remote start and stop commands from a transfer switch or remote switch will be ignored.Press AUTO to place the generator set in Automatic mode, when appropriate.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
OCShutdown occurs after 3 unsuccessful starting attempts. The crank cycle is set for three starting attempts of 15 seconds cranking and 15 seconds rest. The generator set also shuts down after 1 crank attempt if no speed signal is sensed. Shuts down 1 second after the fault is detected.Check the fuel supply, spark plug, and battery. Check for loose connections.Contact an authorized distributor/dealer for service if problem continues.Kohler 10RFOY, Kohler 10ROY, Kohler 12RES, Kohler 12TRES, Kohler 15RFOY, Kohler 15ROY
OFShutdown occurs when the governed frequency exceeds 110% of the system’s frequency setpoint for more than 1 second. This protective becomes active 30 seconds after engine start.Shutdown occurs when the governed frequency exceeds 110% of the system’s frequency setpoint for more than 5 seconds. This function becomes active 10 seconds after engine start (10 second inhibit).Contact an authorized distributor/dealer for service if problem continues.Kohler 12RES, Kohler 12TRES, Kohler 17RES, Kohler 17RES/18RES, Kohler 18RES, Kohler 18TRES
OSShutdown occurs if the engine speed exceeds 115% of the normal running speed for more than 1 second.Shutdown occurs if the engine speed exceeds 110% of the normal running speed for more than 0.3 seconds.Contact an authorized distributor/dealer for service if problem continues.Kohler 10RFOY, Kohler 10ROY, Kohler 12RES, Kohler 12TRES, Kohler 15RFOY, Kohler 15ROY
OUShutdown occurs if the voltage exceeds 120% of the voltage regulator setpoint for more than 1 second.Shutdown occurs if the voltage exceeds 120% of the system nominal voltage for more than 2 seconds.Contact an authorized distributor/dealer for service if problem continues.Kohler 12RES, Kohler 12TRES, Kohler 17RES, Kohler 17RES/18RES, Kohler 18RES, Kohler 18TRES
Oil Pres LowThe engine ECM indicates low oil pressure.Note: The low oil pressure shutdown does not protect against low oil level. Check the engine oil level regularly as recommended in Section 4. Check for leaks in the lubrication system. Check the oil level and add oil if the level is low. Check the oil pressure switch and wiring.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Over CrankThree unsuccessful starting attempts.Check the fuel supply, spark plug, and battery. Check for loose connections. Contact an authorized distributor/dealer for service.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
Over/under frequencyOver/under frequencyKohler 10ERG, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ, Kohler 32EOZ, Kohler G2
Over/under voltageOver/under voltageKohler 10ERG, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ, Kohler 32EOZ, Kohler G2
OvercrankRemote two-wire start/stop capabilityKohler 12RES, Kohler 18RES
Overcrank safetyOverspeedKohler 10ERG, Kohler 25EFOZD, Kohler 28EFOZD, Kohler 28EOZ, Kohler 32EOZ, Kohler G2
OverfrequencyDigital voltage regulation: ±1.5% RMS no-load to full-loadKohler 12RES, Kohler 18RES
OverspeedAutomatic start for programmed cranking cycleKohler 10ERG, Kohler 12RES, Kohler 18RES
P0107TMAP circuit malfunctionCheck continuity of wiring and connections, replace faulty components if necessaryKohler ECH940, Kohler ECH980
P0108TMAP circuit malfunctionCheck continuity of wiring and connections, replace faulty components if necessaryKohler ECH940, Kohler ECH980
P0122Low voltage condition on TPS circuitKohler ECH940, Kohler ECH980
P0123High voltage condition on TPS circuitKohler ECH940, Kohler ECH980
P26Fuel Pump/ValveKohler 4.5 CKM
P3-4SDR RelayKohler 4.5 CKM
PrimLoopOpnIgnition coil 1 voltage is below normal or there is an open circuit.Check the battery voltage. Contact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
PrimLoopShtIgnition coil 1 voltage is abnoContact an authorized distributor/dealer for service and provide the fault code.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
RWater Temperature IndicatorKohler STTII-52V-25CH-LP-EFI, Kohler STTII-52V-26CH-EFI, Kohler STTII-52V-31BV, Kohler STTII-61V-25CH-LP-EFI, Kohler STTII-61V-25KBD, Kohler STTII-61V-31BV
RUNRUNKohler FR II, Kohler FR1, Kohler G-292806
Reactive Power Low WarningLoss of Field ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
Real Power High WarningOver Power ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
Real Power Low WarningReverse Power ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
SDROverspeed ShutdownDeenergize engine componentsKohler 10C, Kohler 10CC, 12CC Mobile Generator Set, Kohler 10CFC, Kohler 10CFZ, Kohler 10CZ, 12CZ Mobile Generator Set, Kohler 12C
SL001Check coolant levelKohler KD36V16
SL003Check the ventilation holes on the water pumpKohler KD36V16
SL004Check/drain water trap on the primary fuel filterKohler KD36V16
SL100Take oil sample and perform oil analysisKohler KD36V16
SL105Replace main fuel filterKohler KD36V16
SL106Replace the primary fuel filterKohler KD36V16
SL107Replace the oil separator filter insert of the crankcase breatherKohler KD36V16
SL108Change air filter main elementKohler KD36V16
SL109Check and change the V-ribbed belt for the battery charging alternatorKohler KD36V16
SL118Check state of fan drive belt drive and replace if necessaryKohler KD36V16
SL120Take coolant sample and perform coolant analysisKohler KD36V16
SL121Replace diesel engine oil and oil filterKohler KD36V16
SQChoke Will Not Fully Open1. Adjust choke. 2. Repair with kit or replace choke.Kohler KT17, Kohler KT21, Kohler Kt19
Seawater pump impeller failureSeawater pump impeller failure shutdownKohler G2
SyncFailureThe generator has been attempting to synchronize for over 2 minutes without success.Generator is hunting. Advanced speed control settings need adjustment. Load is changing frequently to disturb the online generator.Kohler 14/20RESA/RESAL, Kohler 14RCA, Kohler 14RCA/L, Kohler 20 kW Models, Kohler 20RCA, Kohler 20RCA/L
TP-5393Will not crankWeak or dead battery, 15-amp controller fuse blown, Defective start switch, Remote start cable disconnected, Defective starter solenoid, Battery connections made in reverseRecharge or replace, Replace fuse, Replace, Reconnect, Replace, CorrectKohler 4 and 5 kW, Kohler 4CFKM, Kohler 4CFKM/CFKMR, Kohler 4CKM, Kohler 4CKM/CKMR, Kohler 5CKM
TP-6905 4/16Generator set serial number is unavailable.Contact an authorized distributor/dealer for service. See section 3.11.Kohler 24RCL, Kohler 30RCL, Kohler 38RCLB
TP-7092Engine starting battery is deadCheck and clean the battery, terminals, cables. If necessary, recharge or replace the battery.Kohler 14RCA, Kohler 20RCA
TestTestKohler Series S340
UFShutdown occurs when the governed frequency falls 1 Hz below the system’s frequency setpoint for more than 1 second.Shutdown occurs if the governed frequency falls below 54 Hz for more than 5 seconds. Shutdown also occurs if the governed frequency falls below 56.5 Hz for more than 60 seconds. This function becomes active 10 seconds after engine start. (10 second inhibit).Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service if problem continues.Kohler 12RES, Kohler 12TRES, Kohler 17RES, Kohler 17RES/18RES, Kohler 18RES, Kohler 18TRES
UUShutdown occurs if the voltage falls below 80% of the voltage regulator setpoint for more than 1 second. This protective becomes active 30 seconds after engine start.Shutdown occurs if the voltage falls below 80% of the nominal system voltage for more than 10 seconds.Reduce the load and restart the generator set. Contact an authorized distributor/dealer for service if problem continues.Kohler 12RES, Kohler 12TRES, Kohler 17RES, Kohler 17RES/18RES, Kohler 18RES, Kohler 18TRES
UnderfrequencyMaster control switch mounted on the junction box: Run/Off-Reset/AutoKohler 12RES, Kohler 18RES
UndervoltageUpgradeable application softwareKohler 12RES, Kohler 18RES
Voltage L1-L2 High WarningOver Voltage ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
Voltage L1-L2 Low WarningUnder Voltage ParalleledPress AUTO or OFF *Kohler 14/20RESA/RESAL, Kohler 20 kW Models, Kohler 20RESC/RESCL, Kohler Model RESA/L or RESC/L, Kohler RDC2
Volts L1-L2Generator voltage high. Output voltage exceeds 120% of the system nominal voltage for more than 2 seconds.Contact an authorized distributor/dealer for service.Kohler 14RCA/L, Kohler 20RCA, Kohler 20RCA/L, Kohler RDC2 Controller
nullDefective exhaust valve.Kohler M18, Kohler M20

Compiled from Kohler service manuals and controller documentation. Cause/remedy shown where extracted; always verify against the manual for your exact model.

Common questions

What does Kohler fault code 000 mean?

The 'AUT' pictogram is flashing, and the generating set stops unexpectedly.. Remedy: Pressing the 'STOP' button will stop the generating set immediately in general fault mode. The general fault LED will light up flashing and the following message will appear: 000 010 represents a fault code. Refer to the list of fault codes in Section 4.4..

What does Kohler fault code 010 mean?

The generating set stops immediately when pressing the emergency stop button.. Remedy: Acknowledge (reset) the fault by moving the key switch to OFF, waiting for the 'ON' LED to go out completely and then moving the key switch to ON..

What does Kohler fault code 0174 mean?

Lean Fuel Condition at High Load (Open Loop). Remedy: Procédure d'apprentissage du TPS incorrecte.