340 Kohler generator fault/alarm codes with symptom, cause and remedy — compiled from Kohler service and controller documentation.
| Code | Meaning / symptom | Cause | Remedy |
|---|---|---|---|
| 000 | The '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. | |
| 000 | The generating set stops immediately when pressing the 'STOP' button during an external command. | Resolve the fault which has required the emergency stop button to be pressed, release the emergency stop button by turning it clockwise, and 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. | |
| 1 | PARADA DE EMERGENCIA* | ||
| 1 | Engine starts hard, or runs roughly or stalls at idle speed. | Adjust the low idle speed screw, then adjust the low idle fuel needle. | |
| 1 | Black, sooty exhaust smoke, engine sluggish. | Readjust main fuel screw | |
| 1--23 | Local display shows chgr1/2 val 1--23 error. | ||
| 2 | AUXILIAR* | ||
| 2 | Engine runs rich. | ||
| 2 | Engine misses and backfires at high speed. | Readjust main fuel screw | |
| 3 | SOBREARRANQUE* | ||
| 3 | Engine runs lean. | ||
| 3 | Engine starts, sputters and dies under cold weather starting. | Turn main fuel adjustment 1/4 turn counterclockwise | |
| 4 | SOBREVELOCIDAD* | ||
| 4 | Fuel leaks from carburetor. | ||
| 4 | Engine runs rough or stalls at idle speed. | Readjust speed then idle fuel screw if needed | |
| 5 | BAJA PRES. ACEITE* | ||
| 6 | ALTA TEMP. MOTOR* | ||
| 7 | SISTEMA LISTO* | ||
| 9 | NO ESTA EN AUTOM.* | ||
| 010 | The 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. | |
| 10 | PREAL., ALTA TEMP. MOTOR* | ||
| 11 | PREAL., BAJA PRES. ACEITE* | ||
| 12 | BAJA TEMP. AGUA* | ||
| 12 | OVERCRANK - O.C. | ||
| 12VDC + | 12VDC + | ||
| 13 | BAJO VOLTAJE BAT.* | ||
| 14 | FALLA CARG. BAT.* | ||
| 15 | COMBUST. BAJO* | ||
| 16 | FALLA COMUN | ||
| 21 | Engine Speed Synchronization — Loss of synchronization | Engine speed sensor related: sensor connector or wiring; sensor loose or air gap incorrect; speed sensor wheel related: damaged teeth, gap section not registering; engine wiring harness related: pin circuit wiring or connectors (pins 3 and/or 21 for "35 Pin" MA 1.7 Metal-Cased ECU; pins 9 and/or 10 for "24 Pin" MSE 1.0 Plastic-Cased ECU; pins 9 and/or 10 for "32 Pin" MSE 1.1 Plastic-Cased ECU); ECU/harness related: ECU-to-harness connection problem | |
| 22 | Throttle Position Sensor (TPS) — Unrecognizable signal is being sent from sensor (too high, too low, inconsistent). A "limp-home" operating mode occurs, with an overall decrease in operating performance and efficiency. Fuel delivery is based upon the oxygen sensor and five mapped values only. Rich running (black smoke) will occur until "closed loop" operation is initiated. A stumble or misfire on hard acceleration and/or erratic operation may be exhibited. | TPS sensor related: sensor connector or wiring; sensor output affected or disrupted by dirt, grease, oil, wear, or breather tube position (must be to side opposite the TPS); sensor loose on throttle body manifold; throttle body related: throttle shaft or bearings worn/damaged; engine wiring harness related "35 Pin" (MA 1.7) Metal-Cased ECU: pin circuits 12, 25 and/or 27 damaged (wiring or connectors), pin circuits 12, 25 and/or 27 routed near noisy electrical signal (coils, alternator), intermittent 5 volt source from ECU (pin circuit 25); engine wiring harness related "24 Pin" (MSE 1.0) Plastic-Cased ECU: pin circuits 4, 8, and/or 14 damaged (wiring, connectors), pin circuits 4, 8, and/or 14 routed near noisy electrical signal (coils, alternator), intermittent 5 volt source from ECU (pin circuit 14); engine wiring harness related "32 Pin" (MSE 1.1) Plastic-Cased ECU: pin circuits 4, 8, and/or 18 damaged (wiring, connectors), pin circuits 4, 8, and/or 18 routed near noisy electrical signal (coils, alternator), intermittent 5 volt source from ECU (pin circuit 18); ECU/harness related: ECU-to-harness connection problem | |
| 23 | ECU — ECU is unable to recognize or process signals from its memory. Engine will not run. | ECU (internal memory problem), diagnosable only through the elimination of all other system/component faults | |
| 24 | Engine Speed Sensor — No tooth signal from speed sensor. MIL light will not go out when cranking. None-engine will not start or run as ECU is unable to estimate speed. | Engine speed sensor related: sensor connector or wiring, sensor loose or air gap incorrect; speed sensor wheel related: damaged teeth, gap section not registering; engine wiring harness related: pin circuit wiring or connectors (pins 3 and/or 21 for "35 Pin" MA 1.7 Metal-Cased ECU; pins 9 and/or 10 for "24 Pin" MSE 1.0 Plastic-Cased ECU; pins 9 and/or 10 for "32 Pin" MSE 1.1 Plastic-Cased ECU); ECU/harness related: ECU-to-harness connection problem | |
| 26 | AUXILIARY - AUX. | ||
| 31 | Fuel Mixture or Oxygen Sensor — "System too lean." Oxygen sensor not sending expected voltage to ECU. System operates under "open loop" control only. Until fault is detected and registered by ECU, engine will run rich if oxygen sensor is shorted to ground or lean if it is shorted to battery voltage. After fault is detected, performance can vary, depending on cause. If performance is pretty good, the problem is probably with the oxygen sensor, wiring, or connectors. If the engine is still running rich (laboring, short on power) or lean (popping or misfiring), the fuel mixture is suspect, probably incorrect TPS initialization or low fuel pressure. | TPS initialization incorrect: lean condition (check oxygen sensor signal with VOA and see Oxygen Sensor section); engine wiring harness related: pin circuit wiring or connectors (pin 10 for "35 Pin" MA 1.7 Metal-Cased ECU; pin 11 for "24 Pin" MSE 1.0 Plastic-Cased ECU; pin 20 for "32 Pin" MSE 1.1 Plastic-Cased ECU); low fuel pressure; oxygen sensor related: sensor connector or wiring problem, exhaust leak, poor ground path to engine (sensor is case grounded); poor system ground from ECU to engine, causing rich running while indicating lean | |
| 0031 | Oxygen Sensor Heater Circuit High Voltage | ||
| 32 | Oxygen Sensor — No change in the sensor output signal. "Open loop" operation only, may cause a drop in system performance and fuel efficiency. | Engine wiring harness related: pin circuit wiring or connectors (pin 10 for "35 Pin" MA 1.7 Metal-Cased ECU; pin 11 for "24 Pin" MSE 1.0 Plastic-Cased ECU; pin 20 for "32 Pin" MSE 1.1 Plastic-Cased ECU); oxygen sensor related: sensor connector or wiring problem, sensor contaminated or damaged, sensor below the minimum operating temperature (375°C, 709°F), poor ground path from sensor to engine (sensor grounds through shell, see Oxygen Sensor section) | |
| 32 | High Coolant Temperature | ||
| 32 | COMMON FAULT | ||
| 32 | Sensor de oxígeno | Relacionado 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). | |
| 0032 | Oxygen Sensor Heater Circuit Low Voltage | ||
| 32A | Emergency Stop | Reset the emergency stop switch. | |
| 33 | Oxygen Sensor/Fuel System — "System too rich." Temporary fuel adaptation control is at the upper limit. Erratic performance. Will run rich (smoke). | Fuel supply related (nothing lean – only rich): restricted return line causing excessive fuel pressure, fuel inlet screen plugged (in-tank fuel pump only), incorrect fuel pressure at fuel rail; oxygen sensor related: sensor connector or wiring problem, sensor contaminated or damaged, exhaust leak, poor ground path, pin circuit wiring or connectors (pin 10 for "35 Pin" MA 1.7 Metal-Cased ECU; pin 11 for "24 Pin" MSE 1.0 Plastic-Cased ECU; pin 20 for "32 Pin" MSE 1.1 Plastic-Cased ECU); TPS sensor related: throttle plate position incorrectly set or registered during "Initialization", TPS problem or malfunction; engine wiring harness related: difference in voltage between sensed voltage (pin circuit 17 for metal-cased ECU, pin circuit 2 for plastic-cased ECU) and actual injector voltage (circuit 45/45A); systems related: ignition (spark plug, plug wire, ignition coil), fuel (fuel type/quality, injector, fuel pump, fuel pressure), combustion air (air cleaner dirty/restricted, intake leak, throttle bores), base engine problem (rings, valves), exhaust system leak, fuel in the crankcase oil, blocked or restricted fuel return circuit to tank; ECU/harness related: ECU-to-harness connection problem | |
| 34 | Oxygen Sensor/Fuel System Components — Long term fuel adaptation control is at the upper or lower limit. System operates "closed loop." No appreciable performance loss as long as the temporary adaptation can provide sufficient compensation. | Oxygen sensor related: sensor connector or wiring problem, sensor contaminated or damaged, exhaust leak, poor ground path, pin circuit wiring or connectors (pin 10 for "35 Pin" MA 1.7 Metal-Cased ECU; pin 11 for "24 Pin" MSE 1.0 Plastic-Cased ECU; pin 20 for "32 Pin" MSE 1.1 Plastic-Cased ECU); TPS sensor related: throttle plate position incorrect during "Initialization" procedure, TPS problem or malfunction; system related: engine is operating above the 176°C (350°F) temperature sensor limit; engine wiring harness related: difference in voltage between sensed voltage (pin circuit 17 for metal-cased ECU, pin circuit 2 for plastic-cased ECU) and actual injector voltage (circuit 45/45A), problem in wiring harness, ECU-to-harness connection problem; systems related: ignition (spark plug, plug wire, ignition coil), fuel (fuel type/quality, injector, fuel pressure, fuel pump), combustion air (air cleaner dirty/restricted, intake leak, throttle bores), base engine problem (rings, valves), exhaust system leak (muffler, flange, oxygen sensor mounting boss, etc.), fuel in the crankcase oil, altitude, blocked or restricted fuel return circuit to tank | |
| 35 | LOW WATER TEMP | ||
| 36 | HIGH ENG. TEMP | ||
| 36 | High Engine Temperature | ||
| 38 | SPEED PREAL | ||
| 38 | Low Oil Pressure | ||
| 39 | OVERSPEED - OS. | ||
| 40 | Pre High Coolant Temp. | ||
| 40 | PREAL. IMMEDIATE STOP | ||
| 41 | Pre Low Oil Pressure | Check and adjust oil level or replace oil pump. | |
| 41 | Engine Overheats | ||
| 42 | Engine (Oil) Temperature Sensor — Not sending proper signal to ECU. Engine may be hard to start because ECU can't determine correct fuel mixture. | Temperature sensor related: sensor wiring or connection; engine wiring harness related "35 Pin" (MA 1.7) Metal-Cased ECU: pin circuits 14 and/or 27A damaged (wires, connectors) or routed near noisy signal (coils, alternator, etc.), ECU-to-harness connection problem; engine wiring harness related "24 Pin" (MSE 1.0) Plastic-Cased ECU: pin circuits 4, 6 and/or 4A damaged (wires, connectors) or routed near noisy signal (coils, alternator, etc.), ECU-to-harness connection problem; engine wiring harness related "32 Pin" (MSE 1.1) Plastic-Cased ECU: pin circuits 4, 6 and/or (4A) damaged (wires, connectors) or routed near noisy signal (coils, alternator, etc.), ECU-to-harness connection problem | |
| 43 | TPS "Auto-Learn" initialization function failed, throttle angle out of learning range (Below Min. Limit) — While performing the TPS "Auto-Learn" function, the measured throttle angle was not within acceptable limits. MIL illuminated. Engine will continue to run but not properly. Upon restart TPS Auto-Learn function will run again unless voltage to ECU disconnected to clear memory. | TPS related: TPS rotated on throttle shaft assembly beyond allowable range, TPS bad; engine wiring harness related: broken or shorted wire in harness (ECU pin 18 to TPS pin 1, ECU pin 4 to TPS pin 2, ECU pin 8 to TPS pin 3); throttle body related: throttle shaft inside TPS worn, broken, or damaged, throttle plate loose or misaligned, throttle plate bent or damaged allowing extra airflow past, or restricting movement; ECU related: circuit providing voltage or ground to TPS damaged, TPS signal input circuit damaged; oxygen sensor/harness related: oxygen sensor bad, wiring problem to oxygen sensor, muffler leak (causing O2 sensor to falsely indicate a lean condition), bad ground between ECU and Engine | |
| 44 | TPS "Auto-Learn" initialization function failed, throttle angle out of learning range (Above Max. Limit) — While performing the TPS "Auto-Learn" function, the measured throttle angle was not within acceptable limits. MIL illuminated. Engine will continue to run but not properly. Upon restart TPS Auto-Learn function will run again unless voltage to ECU disconnected to clear memory. | TPS related: TPS rotated on throttle shaft assembly beyond allowable range, TPS bad; engine wiring harness related: broken or shorted wire in harness (ECU pin 18 to TPS pin 1, ECU pin 4 to TPS pin 2, ECU pin 8 to TPS pin 3); throttle body related: throttle shaft inside TPS worn, broken, or damaged, throttle plate loose or misaligned, throttle plate bent or damaged allowing extra airflow past, or restricting movement; ECU related: circuit providing voltage or ground to TPS damaged, TPS signal input circuit damaged; oxygen sensor/harness related: oxygen sensor bad, wiring problem to oxygen sensor, muffler leak (causing O2 sensor to falsely indicate a lean condition), bad ground between ECU and Engine | |
| 48 | Emergency Stop | ||
| 51 | Injector #1 circuit open, shorted to ground, or shorted to battery — Injector #1 is not functioning because the circuit is open, shorted to ground, or shorted to battery. Engine will run very poorly with only one cylinder functioning. | Injector related: injector coil shorted or opened; engine wiring harness related: broken or shorted wire in harness (ECU pin 14 to injector pin 2, ECU pin 28 to fuel pump relay pin 86, fuel pump relay pin 87 to injector pin 1), open main fuse F1; fuel pump relay related: bad fuel pump relay (primary side functional but pin 30 to pin 87 remains open; primary side pin 85 to pin 86 is either open, or shorted during engine operation); ECU related: circuit controlling injector #1 damaged, circuit controlling fuel pump relay damaged | |
| 52 | Injector #2 circuit open, shorted to ground, or shorted to battery — Injector #2 is not functioning because the circuit is open, shorted to ground, or shorted to battery. Engine will run very poorly with only one cylinder functioning. | Injector related: injector coil shorted or opened; engine wiring harness related: broken or shorted wire in harness (ECU pin 15 to injector pin 2, ECU pin 28 to fuel pump relay pin 86, fuel pump relay pin 87 to injector pin 1), opened main fuse F1; fuel pump relay related: bad fuel pump relay (primary side functional, but pin 30 to pin 87 remains open; primary side pin 85 to pin 86 is open or shorted during engine operation); ECU related: circuit controlling injector #2 damaged, circuit controlling fuel pump relay damaged | |
| 55 | MIL (Diagnostic lamp) circuit open, shorted to ground, or shorted to battery — MIL is not functioning because the circuit is open, shorted to ground, or shorted to battery. Engine will run normally if no other errors are present. | MIL (diagnostic lamp) related: MIL element opened or element shorted to ground, lamp missing; engine wiring harness related: broken or shorted wire in harness (ECU pin 29 to lamp open or shorted); vehicle wiring harness related: broken or shorted wire in harness (power lead to MIL open or shorted); ECU related: circuit controlling lamp damaged | |
| 56 | Fuel pump relay circuit open, shorted to ground, or shorted to battery — Fuel pump, ignition coils, and fuel injectors will not function because the fuel pump relay circuit is either open, shorted to ground, or may be "on" continuously if shorted to battery. Engine will not run, or fuel pump will continue to run when switch is off. | Fuel pump relay related: bad fuel pump relay (primary side open or shorted); fuel pump related: fuel pump open or shorted internally; engine wiring harness related: fuel pump fuse F1 open, broken or shorted wire in harness (ECU pin 28 to fuel pump relay pin 86, ignition switch to fuel pump relay pin 85); ECU related: circuit controlling fuel pump relay damaged | |
| 56 | AIR DAMPER - A.D. | ||
| 057-243 | ISSUE: 6 | ||
| 60 | SYSTEM READY | ||
| 61 | Denotes the end of fault codes. If signaled first, no other fault codes are present. | ||
| 61 | FALLA DEL CARGADOR DE BATERIA | ||
| 62 | Low Battery Volts | ||
| 62 | BAJO VOLTAJE DE LA BATERIA | ||
| 63 | Low Fuel | Refuel the generator set. | |
| 72 | Overspeed | ||
| 80 | SW. NOT IN "AUTO" | ||
| 90 | High Temperature Sensor Activation | Replace thermostat if function is questionable or defective | |
| 0107 | Manifold Absolute Pressure Sensor Circuit Low Voltage or Open | ||
| 0107 | Circuit du TMAP basse tension ou ouvert | ||
| 0108 | Manifold Absolute Pressure Sensor Circuit High Voltage | ||
| 0108 | Circuit du TMAP haute tension | ||
| 0112 | Intake Air Temperature Sensor Circuit Low Voltage | ||
| 0112 | Circuit basse tension de sonde de température d'air d'admission | ||
| 0113 | Intake Air Temperature Sensor Circuit High Voltage or Open | ||
| 0113 | Circuit haute tension de sonde de température d'air d'admission ou circuit ouvert | ||
| 0117 | Coolant/Oil Temperature Sensor Circuit Low Voltage | ||
| 0117 | Circuit basse tension de sonde de température d'huile/liquide de refroidissement | ||
| 0118 | Coolant/Oil Temperature Sensor Circuit High Voltage or Open | ||
| 0118 | Circuit haute tension de sonde de température d'huile/liquide de refroidissement ou circuit ouvert | ||
| 0122 | Throttle Position Sensor Circuit Low Voltage or Open | ||
| 0122 | Circuit du TPS basse tension ou ouvert | ||
| 0123 | Throttle Position Sensor Circuit High Voltage | ||
| 0123 | Circuit du TPS haute tension | ||
| 0131 | Oxygen Sensor 1 Circuit Low Voltage | ||
| 0131 | Circuit basse tension de sonde d'oxygène 1 | ||
| 0132 | Oxygen Sensor 1 Circuit High Voltage | ||
| 0132 | Circuit haute tension de sonde d'oxygène 1 | ||
| 0171 | Maximum Adaptation Limit Exceeded | ||
| 0172 | Minimum Adaptation Limit Exceeded | ||
| 0174 | Lean Fuel Condition at High Load (Open Loop) | ||
| 0201 | Injector 1 Circuit Malfunction | ||
| 0201 | Injecteur de carburant - Défaillance du circuit, injecteur 1 | ||
| 0202 | Injector 2 Circuit Malfunction | ||
| 0202 | Injecteur de carburant - Défaillance du circuit, injecteur 2 | ||
| 0230 | Fuel Pump Module Circuit Low Voltage or Open | ||
| 0230 | Pompe à carburant - Circuit basse tension ou ouvert | ||
| 0232 | Pompe à carburant - Circuit haute tension | ||
| 0351 | Bobine d'allumage - Défaillance de la bobine d'allumage, cylindre 1 | ||
| 0352 | Bobine d'allumage - Défaillance de la bobine d'allumage, cylindre 2 | ||
| 503 | Engine Over Speed | Reduce engine load or check for mechanical issues. | |
| 601 | Generator Over Temperature | Cool down generator and monitor temperature. | |
| 794 | High Temperature Sensor Activation | Replace thermostat if function is questionable or defective | |
| 812VCC+ | REGISTRO TIRO DE AIRE* | ||
| 1001 | Low Water Emergency | ||
| 1002 | Auxiliary Fault | ||
| 1003 | Pre-Alarm High Engine Temperature | ||
| 1693 | Sortie tach (microprocesseur) - Circuit tach bas | Câble tach défectueux (à la terre). Court-circuit à la masse du circuit GCU. | |
| 1694 | Sortie tach (microprocesseur) - Circuit tach haut | Erreur du circuit du microprocesseur ou GCU. | |
| 6269016 | Anomaly Code | ||
| A | Accidental 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. | |
| AC Sens Loss Shutdwn | Loss of AC sensing shutdown — Shutdown: The controller shut down the generator because there was less than 5% of rated voltage measured on Phase A for 3 seconds, only in AUTO, only after acceptable voltage (> 5% of UV setting) has been detected. | Check for loose wiring and connections; Check all AC leads; Troubleshoot alternator. | |
| AC Sens Loss Warning | Loss of AC sensing warning — Warning: The controller has measured less than 5% of rated voltage on Phase A for 1 second, 10 seconds after crank disconnect. | Check for loose wiring and connections; Check all AC leads; Troubleshoot alternator. | |
| Acc. 23-D | Acc. 23-D timer contact does not open during the set exercise period | ||
| Acc. 26-D | Area Protection Control initiates closing of the engine starting contact | ||
| Accy PwrOver Warning | Accy PwrOver Warning | Controller internal circuit protection activated | Press OFF to reset. Contact an authorized Kohler dealer for service |
| Accy PwrOver Warning | Controller internal circuit protection activated | Press OFF to reset; Contact an authorized Kohler distributor/dealer for service | |
| AccyPwrOver Warning | Accessory Power Overload — Warning: An overcurrent fault (short circuit) on the accessory controller power output. | Check wiring to RBUS accessories; Troubleshoot the RBUS accessories; refer to the documentation provided with the accessories. | |
| AF | Auxiliary fault input shutdown — input from a customer-supplied switch that closes when the fault is active; the generator set shuts down 0.3 seconds after the fault is detected and will not start when the fault is active (input is grounded); this protection becomes active 3 seconds after crank disconnect | Input from a customer-supplied switch that closes when the fault is active. | Check the cause of the auxiliary fault. |
| Always Off | OnCue Plus has been used to control this PIM digital output. The digital output is no longer controlled by the generator set. Applies to digital outputs B3 through B6 on the PIM only | Click on the PIM output in OnCue Plus to turn the output on or off. See the OnCue Plus Operation Manual; To reset the PIM digital output to a function controlled by the generator set, use SiteTech software to re-assign the output event | |
| Always Off | Always Off — Notice: OnCue's Power Chain view has been used to control this digital output. The digital output is no longer controlled by the generator set. Applies to digital outputs B3 through B6 on the PIM only. | Click on the output in OnCue's Power Chain view to turn the output on or off. See the OnCue Operation Manual; To reset the digital output to a function controlled by the generator set, use SiteTech software to re-assign the output event. | |
| Always On | Always On | ||
| ATS ComError Warning | ATS communication error — Warning: The controller has lost communication with the RXT ATS that had previously been communicating properly. | Check connection to ATS module. | |
| ATS Fail Xfr Warning | ATS fail to transfer — Warning: The RXT ATS has reported a fail to transfer, the digital output for ATS Fail To Transfer (PIM) is active (contacts closed). | Consult ATS manual for troubleshooting. | |
| ATS PhaseRot Warning | Warning: The RXT ATS has reported a phase rotation mismatch (3-phase only) and the ATS will not transfer. | Check wiring to the ATS; Consult ATS manual for troubleshooting. | |
| AUTO | AUTO | ||
| Auto Locked | Chicago Code Active — The digital output for Chicago Code Active (PIM) is active (contacts closed), indicating the digital input for Chicago Code Active (PIM) is active (low) and thus master switch is locked in the AUTO position | Check customer equipment connected to the PIM module | |
| Aux Input Shutdwn | Auxiliary input shutdown — Shutdown: The controller shut down the generator because the digital input for a custom shutdown (AuxiliaryInputShutdown - PIM) was activated (low). | Check customer equipment connected to the PIM module. | |
| Aux Input Warning | Auxiliary input warning — Warning: The digital input for a custom warning (AuxiliaryInputWarning - PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Auxiliary fault | Auxiliary fault | ||
| Auxiliary Input | Auxiliary Input — An optional customer-connected input is closed. (Digital input from optional PIM.) | Check customer-supplied equipment. | |
| Auxiliary Switch Fault | Auxiliary Switch Fault — GEN Position and Utility Source Position LEDs flash alternately 2 times/second. | Controller cannot determine the transfer switch position. | Check wiring and connections to position microswitches. See the schematic drawing for connections. Test position microswitch operation. Replace microswitch if necessary. See Section 7. Transfer switch in intermediate position. Disconnect power and manually operate the transfer switch. See instructions in the ATS operation/installation manual. Inspect for signs of coil damage or overheating and replace coil if necessary. |
| B | Electrical Shock! | Never touch electrical wires or components while the engine is running. They can be sources of electrical shock. | |
| Batt Chg Flt Warning | Battery charger fault warning — Warning: The digital input for Battery Charger Fault Warning (PIM) is active (low). For an external battery charger only, not applicable to the RDC2 built-in battery charging. | Check customer equipment connected to the PIM module. | |
| Battery CrLo | Critically Low Battery Voltage — Engine starting battery voltage falls below 11 V for more than 10 seconds. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable level. | Check the battery rating and condition.; Check the battery charger operation.; Charge or replace the battery. | |
| Battery CRLow Warning | Warning: Battery voltage dropped to 11 VDC or less for 30 seconds or more. | Check engine starting battery; Check battery charger DC output voltage from RDC2. See Section 5.12.2. | |
| Battery CRLow Warning | Battery CRLow Warning — Warning: Battery voltage dropped to 11 VDC or less for 30 seconds or more. | Check engine starting battery; Check battery charger DC output voltage from VSC on lead CHO to the battery. | |
| Battery High | High Battery Voltage — Engine starting battery voltage rises above 133% (16 V) of the battery voltage setting for more than 10 seconds. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable level. | Check the battery rating and condition.; Check the battery charger operation. | |
| Battery High Warning | Warning: The controller has measured battery voltage that is above the high warning setting for 10 seconds or more. Operates during exercise and normal operation. | Check engine starting battery. | |
| Battery Low | Low Battery Voltage — Engine starting battery voltage falls below the battery voltage setting (typically 12.5 volts) for more than 90 seconds when the engine is not running. Inhibited during the engine crank cycle. Clears when the battery voltage returns to an acceptable level. | Check the battery rating and condition.; Check the battery charger operation.; Charge or replace the battery. | |
| Battery Low Warning | Warning: The controller has measured battery voltage that is below the low warning setting for 90 seconds or more. | Check engine starting battery; Check battery charger DC output voltage from RDC2. See Section 5.12.2. | |
| Battery Low Warnings | Low 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. | |
| Blinking Fast (1 1/2 Hz) | Governor controller is powered and an engine speed signal is being detected. If the engine is not running, this indicates electrical noise on the speed signal wires | ||
| Blinking Slow (1/2 Hz) | Governor controller is powered, but not sensing a speed signal. OK if engine is not running. If the engine is running, this indicates a fault with the speed signal | ||
| BLOWN F1 FUSE (REMOTE ANNUNCIATOR-3 AMP) | Blown controller fuse F1 | DEFECTIVE DECISION DEFECTIVE MONITOR (IF EQUIPPED) REMOTE ANNUNCIATOR (IF EQUIPPED) DEFECTIVE REMAINING ACCESSORIES AUDIO-VISUAL CONNECTED TO TB1-42A ALARM (IF EQUIPPED) | |
| BLOWN F2 FUSE (CONTROLLER-3 AMP) | Blown controller fuse F2 | BATTERY CONNECTIONS REVERSED SHORTED DC SUPPLY TO INDICATOR PANEL SHORTED CONTROLLER CIRCUIT BOARD | |
| BusDeadLive | The 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. | |
| BusLiveDead | The 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. | |
| C | Lethal Exhaust Gases! | Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area. | |
| CfgModelNum | The 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). | The paralleled generator sets must be the same kW model. (i.e. two 14 kW or two 20 kW models.) |
| CfgSysVolt | The 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. | |
| Chk DateTime | Verify Date Time Setting — The time and date have not been set on the generator controller. | Enter the date and time using the RDC2 controller. See Figure 3-8 and Figure 3-16. | |
| Chk DateTime Warning | Check date and time warning — Warning: DC power to the controller has been interrupted and the date and time may not be correct. Event history may not have accurate time/date stamps. | Verify the time and date settings to ensure proper operation of scheduled operations and for event history logging. | |
| ChkngMeter | This generator has paralleled to the other generator and is verifying that the metering is connected and establishing the connection direction | Status message appears the first time the two generators are paralleled | |
| Common Fault | The digital output for Common Fault (PIM) is active (contacts closed), indicating the generator is shutdown for any (all) fault | Check for faults and troubleshoot any/all fault conditions individually | |
| Common Warng | The digital output for Common Warning (PIM) is active (contacts closed), indicating that any (all) warning is active | Check for warnings and troubleshoot any/all warning conditions individually | |
| Common Warng | Common Warng — Notice: The digital output for Common Warning (PIM) is active (contacts closed), indicating that any (all) warning is active. | Check for warnings and troubleshoot any/all warning conditions individually. | |
| ConCheckFail | Failure to Auto-Discover APM connections. | Wires 9A and 9B crossed between the generators. Wires 9A or 9B not connected. | |
| ConChecking | Performing APM connection auto-discovery | This generator has started in RUN, the other generator is in OFF | |
| ConNotDeterm | APM 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. | See the APM instruction sheet for instructions to perform the auto-discovery procedure |
| ContactorOk | Successful auto-discovery of APM connections. | Auto-discovery was activated by placing other generator in OFF and this generator in RUN. | |
| Coolant Lvl Low | Low Coolant Level Shutdown — The coolant level switch input has been activated. | Check coolant level.; Check radiator hoses for leaks.; Contact an authorized distributor/dealer for service. | |
| CoolntTemp 0 | Coolant Temp 0 Shutdown — The ECM reported a problem with the coolant temperature sensor reading: 0 = high temperature. | Check coolant level.; Check radiator and fans for obstruction.; Contact an authorized distributor/dealer for service and provide the fault code. | |
| CoolntTemp 3 | Coolant Temp 3 Shutdown — The 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. | |
| CoolntTemp 4 | Coolant Temp 4 Shutdown — The 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. | |
| CoolntTemp 5 | Coolant Temp 5 Shutdown — The 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. | |
| CoolTemp Vhi | Ect Higher Than Expected 2 — Coolant 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. | |
| CoolTempHigh | Ect Higher Than Expected 1 — Coolant temperature is too high. | Check coolant level.; Check radiator and fans for obstruction.; Contact an authorized distributor/dealer for service and provide the fault code. | |
| Crank Lost | Crank Signal Lost — Crankshaft Position Sensor (CPS) timeout error occurred. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| Current A High Warning | Over Current | ||
| DCB1 | Relé de falla común DCB1 | Llene 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. | |
| DCB2 | Relé de falla común DCB2 | ||
| Default Pars Warning | Default Parameters — Warning: The controller has been loaded with default parameters. | Configure settings as required for desired operation. | |
| E0 | Controller memory failure | Replace governor controller. | |
| E1 | Loss of remote speed potentiometer signal | ||
| E2 | Overspeed detected. Governor controller must be turned off and reset to allow an engine restart | ||
| E3 | Actuator drive overcurrent detected | Check wiring. Check actuator loading and linkage. | |
| E-28 | LAMP TEST — INDICATOR LAMP DOES NOT LIGHT | ||
| ECM warnings | ECM warnings (any warnings with ECM in the fault name) — This group of faults includes a wide variety of faults that originate from the engine ECM and also contain ECM in the fault name. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| ED0053030050 | Warning YELLOW light turn on | Engine ECU has detect a malfunctions | Contact KOHLER authorised workshops |
| Emerg Pwr On | Emergency Power System Supplying Load — The digital output for EPS Supplying Load (PIM) is active (contacts closed), indicating there is current output (>5%) from the alternator, only if CTs are installed | ||
| Emerg Stop | Emergency Stop Shutdown — The emergency stop switch has been activated, or there has been an open circuit in the wiring. | Contact an authorized distributor/dealer for service. | |
| Emerg Stop Shutdwn | Emerg Stop Shutdwn | Remote emergency stop button activated or shutdown (prime mover) switch turned to the off (open, O) position | Reset the emergency stop switch(es) and reset the controller by pressing the OFF/RESET button |
| Emerg Stop Shutdwn | Shutdown: The optional emergency stop button has been pressed or emergency stop leads ESS and/or ESN are not connected. | Reset the emergency stop button and clear the fault as described in Section 5.6; Check lead ESS and ESN connections to the emergency stop button. If there is no E-stop button, connect ESS and ESN together. | |
| Enclosure Intrusion Alarm | Enclosure Intrusion Alarm — Warning: Enclosure door is open. (Optional communications kit required.) | Close and secure the enclosure door; Check for signs of unauthorized entry. | |
| Eng Cooldown | The digital output for Engine Cooldown Active (PIM) is active (contacts closed), indicating the generator is running in cooldown. (Delay 5 min.) | Check remote start circuit if it was expected that the generator should be running; Consult ATS operations manual | |
| Eng Cooldown | Eng Cooldown — Notice: The digital output for Engine Cooldown Active (PIM) is active (contacts closed), indicating the generator is running in cooldown. (Delay 5 min.) | Check remote start circuit if it was expected that the generator should be running. | |
| Eng Speed High | High Engine Speed — Engine speed exceeds 115% of the normal running speed for more than 0.3 seconds. | Contact an authorized distributor/dealer for service. | |
| Eng Speed Low | Low Engine Speed — Engine 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. | |
| Engine M/N Invalid Shutdwn | Shutdown: Generator model number has not been entered. (Engine model number is selected automatically based on generator set model.) | Enter the generator set model number from the RDC2 keypad, or use SiteTech to select the genset model number. | |
| Engine M/N Invalid Shutdwn | Engine M/N Invalid Shutdwn — Shutdown: Generator model number has not been entered. (Engine model number is selected automatically based on generator set model.) | Enter the generator set model number from the VSC keypad, or use SiteTech to select the genset model number. | |
| Engine Speed High Shutdwn | Shutdown: The controller shut down the generator because engine speed, as calculated from AC frequency, was above the high speed setting for 0.3 seconds or more. | Troubleshoot engine operation per the engine service manual. | |
| Engine Speed High Shutdwn | Engine Speed High Shutdwn — Shutdown: The controller shut down the generator because engine speed, as calculated from AC frequency, was above the high speed setting for 0.3 seconds or more. | Troubleshoot engine operation per the engine service manual. | |
| Engine Speed Low Shutdwn | Shutdown: The controller shut down the generator, after crank disconnect, because engine speed, as calculated from AC frequency, was below the low speed setting for 3 seconds or more. The enclosure thermostat has tripped. | Troubleshoot engine operation per the engine service manual; Check for evidence of high temperatures inside the enclosure. Reset the thermostat. See Section 5.8. | |
| Engine Speed Low Shutdwn | Engine Speed Low Shutdwn — Shutdown: The controller shut down the generator, after crank disconnect, because engine speed, as calculated from AC frequency, was below the low speed setting for 3 seconds or more. | Troubleshoot engine operation per the engine service manual. | |
| ErraticSig | The 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. | |
| ESE | Engine Stop Event | ||
| Exer Not Sch | ATS Exercise Not Scheduled — Exercise Not Scheduled. No exercise has been scheduled on the RDC2 controller. | See Section 2.5 for instructions to set the exerciser. | |
| Exer Not Sch Warning | Warning: There is no exercise scheduled. | Set the exercise schedule. | |
| Exer Not Sch Warning | Exer Not Sch Warning — Warning: There is no exercise scheduled. | Set the exercise schedule. | |
| F1 | No AC output. | Auxiliary winding fuse (F1) blown | Replace the fuse. Contact an authorized distributor/dealer for service if fuse blows repeatedly. |
| F1 | Generator set stops suddenly. | Auxiliary winding fuse (F1) blown | Replace the fuse. Contact an authorized distributor/dealer for service if fuse blows repeatedly. |
| F1 | Blown F1 fuse (remote annunciator: 3 amp) | Defective Decision Monitor; Defective Remote Annunciator; Defective Audio-Visual Alarm (accessories connected to controller TB42A) | |
| F1 | Aux. winding fuse F1 blown | Check fuse F1 and replace if blown. If fuse blows again, check stator | |
| F1 | Auxiliary Winding Fuse — A replaceable 10-amp fuse protects the alternator. | ||
| F1 | Fuse F1, 5 amps | ||
| F1 | Fuse F1 (3-amp) on the controller circuit board protects the engine and controller circuitry | If the generator set will not crank or accessories will not work, and the battery/connections appear okay, one of these fuses may be blown | Replace fuse |
| F1 | Generator 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? | |
| F01 | Error code F01 | Corrective action not stated | |
| F2 | The generator set does not crank. | Fuse F2 blown | Replace the fuse. Contact an authorized distributor/dealer for service if fuse blows repeatedly. |
| F2 | Blown F2 fuse (controller: 3 amp) | Battery connections reversed; shorted DC supply to indicator panel circuit board; shorted controller circuit board | Replace blown fuses and resume operation; if the fuse blows again, use the chart to identify the faulty component(s) |
| F2 | Blown fuse F2, relay interface board (RIB) | Replace fuse. If fuse blows again, disconnect the board leads one at a time to identify the cause of the blown fuse: Lead 70A at the fuel valve; Lead IGN at the ignition module; Lead 71A at the starter relay; Leads FP and FN at the rotor. Repair or replace the component causing the blown fuse. If fuse continues to blow and the previous step did not identify the cause, check the continuity of leads FP and FN and the leads from the P14 connector. Replace any bad leads. Use a pin pusher to remove leads from the connector, if necessary. If replacing the leads does not solve the problem, replace the RIB. | |
| F2 | Blown fuse F2 (ADC-RES) | Replace fuse. If fuse blows again, disconnect the leads one at a time to identify the cause of the blown fuse: Lead 70C at the fuel valve; Lead IGN at the ignition module; Lead 71A at the starter relay; Leads FP and FN at the rotor. Repair or replace the component causing the blown fuse. If fuse continues to blow and the previous step did not identify the cause, check the continuity of leads FP and FN and the leads from the P14 connector. Replace any bad leads. Use a pin pusher to remove leads from the connector, if necessary. If replacing the leads does not solve the problem, replace the controller circuit board. | |
| F2 | The battery is discharged, but the charger has power and is operating. — Blown fuse. | Blown fuse. | Check the 5-amp fuse F2 (5A-T) inside the battery charger and replace if necessary. Check inline fuse F4 and replace if necessary. |
| F2 | Fuse F2, ECM 10 amps | ||
| F2 | Fuse F2 (3-amp) on the controller circuit board protects the engine and controller circuitry | If the generator set will not crank or accessories will not work, and the battery/connections appear okay, one of these fuses may be blown | Replace fuse |
| F02 | Low Oil Pressure | Check oil level and condition. Replace oil if necessary. | |
| F3 | Controller LED display is off | Controller fuse (F3) is blown. | Replace the fuse. If the fuse blows again, contact the distributor/dealer. |
| F3 | The generator set does not crank. | Fuse F3 blown | Replace the fuse. Contact an authorized distributor/dealer for service if fuse blows repeatedly. |
| F3 | Generator set stops suddenly. | Controller fuse (F3) blown | Replace the fuse. If the fuse blows again, contact the distributor/dealer. |
| F3 | Blown F3 fuse (engine and accessories: 15 amp) | Defective engine electrical (wire 70) components; defective panel lamps or engine gauges; defective dry contact kit, audio/visual alarm kit, and other accessories connected to TB1-42A | Replace blown fuses and resume operation; if the fuse blows again, use the chart to identify the faulty component(s) |
| F3 | Blown fuse F3, controller | Replace fuse; if fuse blows again, check circuit and components. | |
| F3 | F3 - Engine and Accessories (15 Amp.) blown (genset not equipped with K4 relay) | Defective gauges; Defective safeguard breaker/voltage regulator; Defective engine run circuit; Defective crank circuit | |
| F3 | Fuse F3 (15-amp) on the controller circuit board protects the engine and controller circuitry | If the generator set will not crank or accessories will not work, and the battery/connections appear okay, one of these fuses may be blown | Replace fuse |
| F4 | Aux. winding fuse F4 blown (lead 55) | Replace blown fuse; If fuse blows again, check stator. | |
| F4 | Fuse F4, ignition, 15 amps | ||
| F6 | Fuse F6, starter, 20 amps | ||
| F13 | High Coolant Temperature | Reduce load or allow engine to cool down. Check coolant level and condition. | |
| F14 | Low Coolant Level | Add coolant to proper level. | |
| Failure to Acquire Emergency Source | Failure to Acquire Emergency Source Warning — the transfer switch does not sense voltage from the generator set within 75 seconds after signaling the generator set to start. | Engine start circuit or generator set operation problem; generator set shuts down when the engine start contacts are closed (for example, shutting the generator set down by moving the master switch to OFF during the engine cooldown time delay). | Check the engine start circuit and the generator set operation. Determine the reason for the generator set shutdown and then reset the fault as described in Section 4.4.1. The fault clears when the system acquires the emergency source. |
| Failure to Acquire Standby | Failure to Acquire Standby — GEN Available LED flashes 2 times/second. | Open circuit breaker. | Check and close ATS source and generator set circuit breakers. |
| Failure to Transfer | Failure to Transfer — GEN or Utility Source Position LED flashes 2 times/second. | Source not available. | Check source voltage, frequency, stability. |
| Faults Related to Paralleling | Paralleling issues occur, such as incorrect synchronization or failure to maintain parallel operation. | Verify that all paralleling settings are correct in the controller parameters. Check the paralleling cables and connections for any faults. | |
| Frequency High | High Frequency — Governed frequency exceeds 110% of the system’s frequency setpoint for more than 10 seconds. Function becomes active 10 seconds after engine start (10 second inhibit). | Contact an authorized distributor/dealer for service. | |
| Frequency High Shutdwn | Shutdown: The controller shut down the generator because the frequency measured on Phase A exceeded the high frequency setting for 10 seconds, 10 seconds or more after crank disconnect. | Troubleshoot engine operation per the engine service manual. | |
| Frequency High Warning | Over Frequency | ||
| Frequency Low | Low Frequency — Governed 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. Function becomes active 10 seconds after engine start (10 second inhibit). | Reduce the load by turning off appliances and restart the generator set.; Contact an authorized distributor/dealer for service. | |
| Frequency Low Shutdwn | Shutdown: The controller shut down the generator because the frequency measured on Phase A was less than the low limit for 10 seconds or the measured frequency was 10 Hz or more less than rated for 60 seconds or more, 10 seconds or more after crank disconnect. The enclosure thermostat has tripped. | Troubleshoot engine operation per the engine service manual; Check for evidence of high temperatures inside the enclosure. Reset the thermostat. See Section 5.8. | |
| Frequency Low Warning | Under Frequency | ||
| Fuel Leak Shutdwn | Shutdown: The controller shut down the generator because the digital input for Fuel Tank Leak Shutdown (PIM) was activated (low). | Check customer equipment connected to the PIM module. | |
| Fuel Leak Shutdwn | Fuel Leak Shutdwn — Shutdown: The controller shut down the generator because the digital input for Fuel Tank Leak Shutdown (PIM) was activated (low). | Check customer equipment connected to the PIM module. | |
| Fuel Leak Warning | Warning: The digital input for Fuel Tank Leak Warning (PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Fuel Level CrHi Warning | Warning: The digital input for Critically High Fuel Level Warning (PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Fuel Level CrHi Warning | Fuel Level CrHi Warning — Warning: The digital input for Critically High Fuel Level Warning (PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Fuel Level High Warning | Warning: The digital input for High Engine Fuel Level Warning (PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Fuel Level Low Shutdwn | Shutdown: The controller shut down the generator because the digital input for Low Fuel Level Shutdown (PIM) was activated (low). | Check customer equipment connected to the PIM module. | |
| Fuel Level Low Shutdwn | Fuel Level Low Shutdwn — Shutdown: The controller shut down the generator because the digital input for Low Fuel Level Shutdown (PIM) was activated (low). | Check customer equipment connected to the PIM module. | |
| Fuel Level Low Warning | Warning: The digital input for Low Fuel Level Warning (PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Fuel Pressure Low | Fuel Pressure Low — Warning: Fuel pressure sensor has measured fuel pressure below 4.5 inches of water column. (Optional communications kit required.) | Check fuel supply and fuel lines; Check the fuel pressure at the regulator. See Section 5.8.2. | |
| Fuel Spill | The digital output for Fuel Spill (PIM) is active (contacts closed), indicating any of the digital inputs for Fuel Tank Leak Warning, Fuel Tank Leak Shutdown, Engine Fuel Level Warning or Engine Fuel Level Critically High (PIM) is active (low) | Check customer equipment that is connected to the Fuel Tank Leak Warning, Fuel Tank Leak Shutdown, Engine Fuel Level Warning or Engine Fuel Level Critically High input on the PIM | |
| Gen Running | Gen Running — Notice: The digital output for Generator Running (PIM) is active (contacts closed), indicating the generator is running. | Check controller front panel buttons for potential RUN command; If in AUTO, check remote start lines. | |
| GenBrkerOpen Warning | Generator Circuit Breaker Open — There is voltage at the generator set but no voltage measured on the emergency side of the ATS (Model RXT transfer switch required) | Check line circuit breaker; Check for and correct short circuits or overloading on the load side before resetting the circuit breaker | |
| Generator Management Off | This generator has been stopped by generator management because it is not presently needed to supply the load. The generator is available and will start if it is needed again | ||
| Genset S/N Unaval | Unavailable Genset Serial Number — Generator set serial number is unavailable. | Contact an authorized distributor/dealer for service. See section 3.11. | |
| Ground Fault | Ground Fault Warning — The digital input for Ground Fault Warning is active (low). (PIM required.) | Check customer equipment connected to the PIM. | |
| Ground Fault Warning | The digital input for Ground Fault Warning (PIM) is active (low) | Check customer equipment connected to the PIM module | |
| HB | High battery voltage warning — fault 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; the fault condition clears when the battery voltage returns to a voltage within the limits for more than 10 seconds | Battery rating or condition | Check the battery rating and condition. |
| HE | High engine temperature shutdown — Shutdown 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. | Low engine coolant level | Check for blocked air inlets and exhaust outlets. |
| HEST | High Exhaust System Temperature | ||
| HET | High Engine Temperature (HET) Shutdown | Normally open K1 contacts (F) close and fault lamp lights. Normally—closed K1 contacts (G) open to de-energize engine components. Generator shuts down. | |
| High battery voltage | High battery voltage | ||
| High battery voltage | Battery voltage exceeds normal range | ||
| High engine temperature | Engine runtime, hours | ||
| High engine temperature | High engine temperature shutdown | ||
| High engine temperature | Engine overheating | ||
| High Lube Oil Temperature Shutdown | Oil temperature higher than 325_F (163_C) | ||
| High Lube Oil Temperature Shutdown | High Lube Oil Temperature Shutdown — Shutdown: Oil temperature higher than 325°F (163°C). | ||
| High Lube Oil Temperature Warning | Oil temperature higher than 300_F (149_C) | See Overheats in the troubleshooting charts in Section 5.14 | |
| High Lube Oil Temperature Warning | High Lube Oil Temperature Warning — Warning: Oil temperature higher than 300°F (149°C). | See Overheats in the troubleshooting charts in Section 4.9. | |
| IAT High 1 | Iat Higher Than Expected 1 — Engine manifold air temperature is too high. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| IAT Volt Lo | Iat Low Voltage — The ECM reported an Engine Air Temperature/Manifold Absolute Pressure Sensor (TMAP) error. | Contact an authorized distributor/dealer for service and provide the fault code. | |
| K1 relay LED | Engine Run Relay | ||
| K2 relay LED | Engine Crank Relay | ||
| K3 | Flash relay (K3) on RIB (ADC 2100) | Check flash LED on RIB; Check fuse F2 and troubleshoot RIB | |
| K3 | Flash relay (K3) on controller board (ADC-RES) | Check fuse F2; Check flash LED1 on controller board. If LED1 indicates power to K3 but relay does not operate, replace controller circuit board | |
| K3 relay LED | AC Crank Disconnect Relay | ||
| K4 relay LED | Fault Shutdown Relay | ||
| K5 relay LED | Time Delay Control (Start/Run) | ||
| KA-01-B | Time Delay on Transfer from Normal to Emergency | ||
| KA-02-A | Time Delay on Engine Starting | ||
| L.F. | Low Fuel | ||
| LB | Low battery voltage warning — Fault code is displayed if the engine starting battery voltage falls below 11 VDC for more than 30 seconds when the engine is not running. Not operative during the engine crank cycle, this fault condition does not inhibit engine starting. The fault condition clears when the battery voltage returns to an acceptable level. | Battery rating or condition | Check the battery rating and condition.; Check the battery charger operation.; Charge or replace the battery. |
| LCL | Low coolant level — not used | Not used on air-cooled models. | |
| Lo Crank Vlt | Low Cranking Voltage — Low 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. | |
| Lo Crank Vlt Warning | During cranking, the controller measured battery voltage less than 60% (7.2V or 14.4V) for 6 seconds or more during cranking | Check cranking battery | |
| Lo Crank Vlt Warning | Lo Crank Vlt Warning — Warning: During cranking, the controller measured battery voltage less than 60% (7.2V or 14.4V) for 6 seconds or more during cranking. | Check cranking battery. | |
| LO P | Low oil pressure shutdown — Shutdown occurs if a low oil pressure condition exists for more than 5 seconds. This protective becomes active 30 seconds after the engine has reached crank disconnect speed (30 second inhibit). 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. | |
| LOC | Loss of coolant — not used | Not used on air-cooled models. | |
| Locked rotor | The generator set also shuts down on OC if no engine rotation is sensed during cranking. Shuts down 3 seconds after the fault is detected. | ||
| Locked Rotor | Locked Rotor — No 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. | |
| Locked Rotor Shutdwn | The controller shut down the generator because no rotation of the engine or alternator was detected, for 3 seconds or more, during cranking | Check cranking circuit; Troubleshoot the engine. See Engine Service Manuals; Check alternator connections to controller and auxiliary winding circuit breaker; Troubleshoot the alternator | |
| Locked Rotor Shutdwn | Locked Rotor Shutdwn — Shutdown: The controller shut down the generator because no rotation of the engine or alternator was detected, for 3 seconds or more, during cranking. | Check cranking circuit; Troubleshoot the engine. See Engine Service Manuals; Check alternator connections to controller and auxiliary winding circuit breaker; Troubleshoot the alternator. | |
| LOP | Low oil pressure shutdown — Shutdown occurs if a low oil pressure condition exists for more than 5 seconds. This protective becomes active 30 seconds after the engine has reached crank disconnect speed (30 second inhibit). Note: The low oil pressure shutdown does not protect against low oil level. Check the oil level at the engine. | Leaks in the lubrication system; low oil level | Check for leaks in the lubrication system; Check the oil level and add oil if the level is low. |
| Loss of coolant | Seawater pump impeller failure shutdown | ||
| Loss of coolant | Loss of coolant | ||
| LossOfComAPM | The 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. | Check the battery connections. See previous page for more information; Check RBUS communication connections |
| LossOfComm2 | The 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. | |
| LossOfField | This 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. | |
| Low battery voltage | Crank cycle status | ||
| Low battery voltage | Low battery voltage | ||
| Low battery voltage | Battery voltage is below normal | ||
| Low Fuel | Low Fuel — Notice: The digital output for Low Fuel (PIM) is active (contacts closed), indicating any of the digital inputs for Low Fuel Pressure Warning, Low Fuel Level Warning or Low Fuel Level Shutdown (PIM) is active (low). | Check customer equipment connected to the PIM module. | |
| Low oil pressure | Low oil pressure shutdown | ||
| Low Oil Pressure | Low Oil Pressure — Shutdown occurs approximately 8 seconds after fault; fault occurs when engine oil pressure drops below specified limit | ||
| LOWT | Low Water Temperature | ||
| LWL | Low Water Level (LWL) Shutdown | Normally open K1 contacts (F) close and fault lamp lights. Normally—closed K1 contacts (G) open to de-energize engine components. Generator shuts down. | |
| M3 | Fuse M3, battery charging alternator, 70 amps | ||
| M3.212 | APM INTERNAL power BATTERY WARNING | ||
| Main Power Overload Shutdown | The 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. | |
| MainPwrOverL | Main Power Overload — Main 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. | |
| MainPwrOverL Shutdown | MainPwrOverL Shutdown | Controller internal circuit protection activated | Press OFF to reset. Contact an authorized Kohler dealer for service |
| MainPwrOverL Shutdown | Controller internal circuit protection activated | Press OFF to reset; Contact an authorized Kohler distributor/dealer for service | |
| MainPwrOverL Shutdwn | The internal current limit circuit has tripped, indicating an overcurrent condition on the DC power supply circuit | Check crank, run, and flash relay circuits for short circuits. See Section 5.12.1 | |
| MainPwrOverL Shutdwn | MainPwrOverL Shutdwn — Shutdown: The internal current limit circuit has tripped, indicating an overcurrent condition on the DC power supply circuit. | Check crank, run, and flash relay circuits for short circuits. | |
| Maint Req'd Warning | Engine run time, or calendar days, has exceeded the maintenance reminder setting | Change the oil and perform other maintenance according to the service schedule in Section 2.1 and in the engine manuals; Reset the maintenance timer after service. See Section 2.7.5 | |
| Maint Req'd Warning | Maint Req'd Warning — Warning: Engine run time, or calendar days, has exceeded the maintenance reminder setting. | Change the oil and perform other maintenance according to the service schedule in Section 2.1; Reset the maintenance timer after service. See Section 2.3. | |
| Maint Req’d | Maintenance Required Warning — Engine maintenance is due. | Check the maintenance schedule in the operation manual for tasks such as changing the oil, spark plugs or the air filter. | |
| MeteringOk | The 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. | |
| MeterUnknown | This 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. | See the APM instructions |
| Minor Fault | Minor Fault — Notice: The digital output for Minor Fault (PIM) is active (contacts closed), indicating either the digital input for Ground Fault Indicator Warning (PIM) is active (low) or the controller detected Low Cranking Voltage. | Check customer equipment connected to the PIM module; Check cranking battery condition. | |
| NoCurrent | The 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. | See the APM instructions |
| NormSrcUnavl | RXT required — Notice: The normal power source (source 1) is disconnected, unavailable or unacceptable | Check for utility source power outage; check wiring and connections to the ATS | |
| Not in Auto | Not In Auto — The 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. | |
| Not In Auto Warning | The RDC2 controller is not in AUTO. The generator will not start from an ATS or remote device. The digital output for Not In Auto (PIM) is active (contacts closed) | Press the Auto button to ensure automatic system operation | |
| null | Defective exhaust valve. | ||
| OB1 CommLoss | Communication with option board #1 has been lost | Check RBUS wiring to inoperative option board | |
| OB1 CommLoss (PIM) | OB1 CommLoss (PIM) — Warning: Communications with option board #1 has been lost. | Check RBUS wiring to inoperative option board. | |
| OB2 CommLoss | Communication with option board #2 has been lost | Check RBUS wiring to inoperative option board | |
| OB3 CommLoss | Communication with option board #3 has been lost | Check RBUS wiring to inoperative option board | |
| OB4 CommLoss | Communication with option board #4 has been lost | Check RBUS wiring to inoperative option board | |
| OC | Overcrank shutdown — Shutdown occurs after 3 unsuccessful starting attempts. The crank cycle is set for three starting attempts of 15 seconds cranking and 15 seconds rest. | Fuel supply or battery problem; no output voltage; line circuit breaker; loose connections | Check the fuel supply, spark plug, and battery.; Check for loose connections.; Contact an authorized distributor/dealer for service if problem continues. |
| OC | Locked rotor — The generator set also shuts down on OC if no engine rotation is sensed during cranking. Shuts down 3 seconds after the fault is detected. | Contact an authorized distributor/dealer for service if problem continues. | |
| OF | Overfrequency shutdown — Shutdown occurs when the governed frequency exceeds 110% of the system's frequency setpoint for more than 5 seconds. This protective becomes active 10 seconds after engine start (10 second inhibit). | Overfrequency | Contact an authorized distributor/dealer for service if problem continues. |
| Off | Governor controller is either not currently powered or is being reverse powered | Check polarity of supplied power. If correctly powered, governor controller is malfunctioning. | |
| Oil Level Low Shutdwn | The controller shut down the generator because the digital input for Low Oil Level Shutdown (PIM) was activated (low) | Check customer equipment connected to the PIM module | |
| Oil Level Low Shutdwn | Oil Level Low Shutdwn — Shutdown: The controller shut down the generator because the digital input for Low Oil Level Shutdown (PIM) was activated (low). | Check customer equipment connected to the PIM module. | |
| Oil Level Low Warning | The digital input for Low Oil Level Warning (PIM) is active (low) | Check customer equipment connected to the PIM module | |
| Oil Pres Low | Low Oil Pressure — The 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. | |
| Oil Pressure Low Shutdwn | The low oil pressure switch was closed for 5 seconds or more, indicating low oil pressure. Function is inhibited until 30 seconds after crank disconnect | Check for oil leaks; Check the oil level and add oil if low; Check the oil pressure sensor; see Engine Service Manuals | |
| Oil Pressure Low Shutdwn | Oil Pressure Low Shutdwn — Shutdown: The low oil pressure switch was closed for 5 seconds or more, indicating low oil pressure. Function is inhibited until 30 seconds after crank disconnect. | Check for oil leaks; Check the oil level and add oil if low; Check the oil pressure sensor; see Engine Service Manuals. | |
| Oil Pressure OpenCR Warning | Oil pressure switch closure has not been detected after shutdown | Check the oil pressure switch connection. Test the LOP switch as described in Section 6.10.2 | |
| Oil Pressure OpenCR Warning | Oil Pressure OpenCR Warning — Warning: When the generator set is not running and controller is in OFF or AUTO, the low oil pressure switch is not working properly. | Check the oil pressure switch connection; Replace the LOP switch if necessary. See Section 5.7.2. | |
| ON and Not Blinking | Governor controller is powered and is malfunctioning | Replace governor controller. | |
| OS | Overspeed shutdown — Shutdown occurs if the engine speed exceeds 110% of the normal running speed for more than 0.3 seconds. | Overspeed | Contact an authorized distributor/dealer for service if problem continues. |
| OU | Overvoltage shutdown — Shutdown occurs if the voltage exceeds 120% of the system nominal voltage for more than 2 seconds. | Overvoltage | Contact an authorized distributor/dealer for service. |
| Over Crank | Over Crank — Three unsuccessful starting attempts. | Check the fuel supply, spark plug, and battery.; Check for loose connections.; Contact an authorized distributor/dealer for service. | |
| Over Crank Shutdwn | The engine did not start during the crank cycle. Time delay is 15 seconds. If noted on the first engine crank cycle, an alternator issue may be indicated | Check the alternator; see Section 6 for alternator test procedures; Check fuel supply. Check cranking circuit. Check cranking battery. Troubleshoot engine; see Engine Service Manuals | |
| Over Crank Shutdwn | Over Crank Shutdwn — Shutdown: The controller shut down the generator, and ceased cranking, because the engine was not successfully started after the completion of the last of the crank cycles setting delay 15 seconds. | Check fuel supply; Check cranking circuit; Check cranking battery; Troubleshoot engine; see Engine Service Manuals. | |
| Over/under frequency | Over/under frequency | ||
| Over/under frequency | Frequency deviates from nominal value | ||
| Over/under voltage | Over/under voltage | ||
| Over/under voltage | Voltage is outside the normal range | ||
| Overcrank | Remote two-wire start/stop capability | ||
| Overcrank | System shuts down on an overcrank fault if the generator set does not start in three attempts | Reset the controller. If the overcrank fault occurs again, contact an authorized distributor/dealer | |
| Overcrank safety | Overspeed | ||
| Overcrank safety | Excessive cranking duration | ||
| Overcrank safety | Overcrank safety | ||
| Overfrequency | Digital voltage regulation: ±1.5% RMS no-load to full-load | ||
| Overspeed | Automatic start for programmed cranking cycle | ||
| Overspeed | Engine speed exceeds safe limits | ||
| P3-4 | SDR Relay | ||
| P26 | Fuel Pump/Valve | ||
| P0107 | TMAP circuit malfunction | Check continuity of wiring and connections, replace faulty components if necessary | |
| P0108 | TMAP circuit malfunction | Check continuity of wiring and connections, replace faulty components if necessary | |
| P0122 | Low voltage condition on TPS circuit | ||
| P0123 | High voltage condition on TPS circuit | ||
| PrimLoopOpn | Primary Loop Open — Ignition 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. | |
| PrimLoopSht | Primary Loop Shorted — Ignition coil 1 voltage is abnormal. | Check the battery voltage.; Contact an authorized distributor/dealer for service and provide the fault code. | |
| ProtectiveRelayTrippedContactor | The contactor has been forced to open to protect one of the generators or the customer's load | ||
| R | Water Temperature Indicator | ||
| RBUS ComError Warning | The controller has lost communication with an RBUS device that had previously been communicating properly | Check connection to the RBUS device | |
| RBUS ComError Warning | RBUS ComError Warning — Warning: The controller has lost communications with a PIM that had previously been communicating properly. | Check connection to the PIM. | |
| Reactive Power Low Warning | Loss of Field | ||
| Real Power High Warning | Over Power | ||
| Real Power Low Warning | Reverse Power | ||
| Reserve Oil Empty | Reserve Oil Empty — Warning: The oil makeup kit reservoir bottle is empty. (Optional communications kit and oil makeup kit required.) | Add oil to the oil makeup kit reservoir. See TT-1591, provided with the oil makeup kit, if necessary. | |
| Rmt StartCmd | Remote Start Command Issued — Notice: The controller has received a remote start signal while the master switch is in AUTO, and will go to normal running. | Verify remote start signal. | |
| RUN | RUN | ||
| Run Btn Ack | Run Button Acknowledged — Notice: The RUN button on the controller has been pushed. | ||
| SCF0 | Software Communication Fault 0 — Indicates a software or communication problem within the ADC 2100 | Software or communication problem within the ADC 2100 | Replace the controller. Contact an authorized distributor/dealer for service. |
| SCF0 | Controller error — Indicates a software or communication problem within the ADC 2100 | Contact an authorized distributor/dealer for service if problem continues. | |
| SDR | Overspeed Shutdown | Deenergize engine components | |
| Seawater pump impeller failure | Seawater pump impeller failure shutdown | ||
| SL001 | Check coolant level | ||
| SL003 | Check the ventilation holes on the water pump | ||
| SL004 | Check/drain water trap on the primary fuel filter | ||
| SL100 | Take oil sample and perform oil analysis | ||
| SL105 | Replace main fuel filter | ||
| SL106 | Replace the primary fuel filter | ||
| SL107 | Replace the oil separator filter insert of the crankcase breather | ||
| SL108 | Change air filter main element | ||
| SL109 | Check and change the V-ribbed belt for the battery charging alternator | ||
| SL118 | Check state of fan drive belt drive and replace if necessary | ||
| SL120 | Take coolant sample and perform coolant analysis | ||
| SL121 | Replace diesel engine oil and oil filter | ||
| SOS 010 | General fault — pressing the "STOP" button when the external command is active ("AUT" pictogram flashing) will stop the generating set immediately in general fault mode (the general fault LED will light up flashing and the SOS 010 fault code appears) | ||
| Spd Sens Flt | Speed Sensor Fault — Engine speed sensor has failed or engine stalled. ECM is no longer reporting valid speed. | Contact an authorized distributor/dealer for service. | |
| Spd Sens Flt Shutdwn | Speed sensor fault — The controller shut down the generator because the speed signal was lost | Check leads 55, 66, F+, and F- between the alternator and the controller. This fault also occurs if the engine stalls; check the engine and see the troubleshooting chart in Section 5.14 | |
| SQ | Choke Will Not Fully Open | 1. Adjust choke. 2. Repair with kit or replace choke. | |
| Start Delay | Engine Start Delay Active — Notice: The digital output for Engine Start Delay (PIM) is active (contacts closed), indicating the engine is in between active cranking cycles. | ||
| SyncFailure | The 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. | |
| Synchronizing | The generator is actively trying to match frequency, voltage and phase with that of the paralleling bus | ||
| System Ready | System Ready — Notice: The digital output for System Ready (PIM) is active (contacts closed), indicating the generator has no active faults or warnings. | ||
| Test | Test | ||
| TP-5393 | Will not crank | Weak or dead battery, 15-amp controller fuse blown, Defective start switch, Remote start cable disconnected, Defective starter solenoid, Battery connections made in reverse | Recharge or replace, Replace fuse, Replace, Reconnect, Replace, Correct |
| TP-6905 4/16 | Generator set serial number is unavailable. | Contact an authorized distributor/dealer for service. See section 3.11. | |
| TP-7092 | Engine starting battery is dead | Check and clean the battery, terminals, cables. If necessary, recharge or replace the battery. | |
| TP-7092 | Loose connections | Tighten all loose connections | |
| TP-7092 | Open circuit breaker | Check and close any open circuit breakers | |
| TP-7092 | The controller displays fault messages | ||
| UF | Underfrequency shutdown — 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 protective becomes active 10 seconds after engine start. (10 second inhibit). | Underfrequency | Reduce the load and restart the generator set.; Contact an authorized distributor/dealer for service if problem continues. |
| Underfrequency | Master control switch mounted on the junction box: Run/Off-Reset/Auto | ||
| Undervoltage | Upgradeable application software | ||
| Unloading | The generator is actively trying to transfer load from itself to the other generator | ||
| UU | Undervoltage shutdown — Shutdown occurs if the voltage falls below 80% of the nominal system voltage for more than 10 seconds. | Undervoltage | Reduce the load and restart the generator set.; Contact an authorized distributor/dealer for service if problem continues. |
| V7 | Fuse V7 on the AC terminal block (TB2) protects the controller meters and lights | If the controller lights and meters are not functioning, check the condition of the V7, V8, and V9 fuses | Replace fuse |
| V8 | Fuse V8 on the AC terminal block (TB2) protects the controller meters and lights | If the controller lights and meters are not functioning, check the condition of the V7, V8, and V9 fuses | Replace fuse |
| V9 | Fuse V9 on the AC terminal block (TB2) protects the controller meters and lights | If the controller lights and meters are not functioning, check the condition of the V7, V8, and V9 fuses | Replace fuse |
| Voltage L1-L2 High Warning | Over Voltage | ||
| Voltage L1-L2 Low Warning | Under Voltage | ||
| Volts L1-L2 | Generator voltage high. Output voltage exceeds 120% of the system nominal voltage for more than 2 seconds. | Contact an authorized distributor/dealer for service. | |
| Volts L1-L2 (AB) High Shutdwn | The controller shut down the generator because the voltage measured from Phase A to Phase B exceeded the high limit for a time greater than the delay setting 2 seconds | Troubleshoot alternator. See Section 5.14, Troubleshooting Charts, and Section 6, Component Testing and Adjustment | |
| Volts L1-L2 (AB) Low Shutdwn | The controller shut down the generator because the voltage measured from Phase A to Phase B was greater 5% of rated, but less than the low voltage setting for a time greater than the delay setting 10 seconds | The enclosure thermostat has tripped | Troubleshoot alternator. See Section 5.14, Troubleshooting Charts, and Section 6, Component Testing and Adjustment; Check for evidence of high temperatures inside the enclosure. Reset the thermostat. See Section 5.8 |
| Volts L1-L2 DC High Shutdwn | Volts L1-L2 DC High Shutdwn — Shutdown: The controller shut down the generator because the voltage measured from Phase A to Phase B exceeded the high limit for a time greater than the delay setting 2 seconds. | Troubleshoot alternator. See Section 4.9, Troubleshooting Charts, and Section 5, Component Testing and Adjustment. | |
| Volts L1-L2 High | High Generator Voltage L1-L2 — Generator Voltage High. Output voltage exceeds 120% of the system nominal voltage for more than 2 seconds. | Contact an authorized distributor/dealer for service. | |
| Volts L1-L2 Low | Low Generator Voltage L1-L2 — Generator Voltage Low. Output voltage falls below 80% of the nominal system voltage for more than 10 seconds. | Reduce the load by turning off appliances and restart the generator set.; Contact an authorized distributor/dealer for service. | |
| Volts L2-L3 High | High Generator Voltage L2-L3 — Generator Voltage High. Output voltage exceeds 120% of the system nominal voltage for more than 2 seconds. | Contact an authorized distributor/dealer for service. | |
| Volts L2-L3 Low | Low Generator Voltage L2-L3 — Generator Voltage Low. Output voltage falls below 80% of the nominal system voltage for more than 10 seconds. | Reduce the load by turning off appliances and restart the generator set.; Contact an authorized distributor/dealer for service. | |
| Volts L3-L1 High | High Generator Voltage L3-L1 — Generator Voltage High. Output voltage exceeds 120% of the system nominal voltage for more than 2 seconds. | Contact an authorized distributor/dealer for service. | |
| Volts L3-L1 Low | Low Generator Voltage L3-L1 — Generator Voltage Low. Output voltage falls below 80% of the nominal system voltage for more than 10 seconds. | Reduce the load by turning off appliances and restart the generator set.; Contact an authorized distributor/dealer for service. | |
| VSpdStartCmd | Variable Speed Start Command — Notice: A diagnostic exercise request has been received by the controller. | Check for a remote exercise command from OnCue. |
Compiled from Kohler service manuals and controller documentation. 69 code numbers mean different things on different controllers; each meaning is listed with the models it applies to. Cause/remedy shown where extracted; always verify against the manual for your exact model.
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..
Engine Speed Synchronization — Loss of synchronization. Cause: Engine speed sensor related: sensor connector or wiring; sensor loose or air gap incorrect; speed sensor wheel related: damaged teeth, gap section not registering; engine wiring harness related: pin circuit wiring or connectors (pins 3 and/or 21 for "35 Pin" MA 1.7 Metal-Cased ECU; pins 9 and/or 10 for "24 Pin" MSE 1.0 Plastic-Cased ECU; pins 9 and/or 10 for "32 Pin" MSE 1.1 Plastic-Cased ECU); ECU/harness related: ECU-to-harness connection problem.