402 Generac generator fault/alarm codes with symptom, cause and remedy — compiled from Generac service and controller documentation.
| Code | Meaning / symptom | Cause | Remedy |
|---|---|---|---|
| 0 | Utility failure | Crank and start engine, transfer load to Generator if Utility returns above 75% nominal for 15 seconds | |
| 0F9677 | Engine won’t crank. | Replace fuse. | |
| 0G0008 | Engine cranks but won't start | Tighten, clean or replace battery cables; replace starter contactor or motor; replace battery if dead. | |
| 0G0056 | Engine cranks but won't start | Tighten, clean or replace battery cables; replace starter contactor or motor; replace battery if dead. | |
| 1 | Ignition cannot initialize — LED is ON continuously during cranking | ||
| 1 | Engine won’t crank. | 1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Replace contactor.* 4. Replace starter motor.* 5. Remove, change or replace battery. 6. Replace fuse.* | |
| 1-1 | CO Monitor | Move generator outside. Contact IASD. | |
| 1-2 | Battery Voltage | Battery voltage above normal operating range | Contact IASD |
| 1-3 | Battery Voltage | Battery voltage below normal operating range | Charge battery to correct level |
| 2 | Engine Overspeed — LED blinks four (4) times, is OFF for three (3) seconds and then repeats | ||
| 2 | TPS Failure | ||
| 2 | Engine cranks but won't start | 1. Replenish fuel. 2. Replace solenoid.* 3. Reconnect wire. 4. Clean, regap or replace plugs. 5. Close door on tank. | |
| 2 flashes of LED | OVERCRANK — 2 flashes of LED | No fuel to the engine | Make sure that the tanks are full and the valves are opened |
| 3 | No Crank Signal — LED blinks two (2) times, is OFF for three (3) seconds and then repeats | ||
| 3 | Cylinder Temp. Failure | ||
| 3 | Engine starts hard, runs rough. | ||
| 3 | Engine fault code present. | See Fault Code Example or contact IASD. | |
| 3 flashes of LED | OVERSPEED — 3 flashes of LED | Governor spring is disconnected | Reconnect spring. Spring should be in the second hole from the bottom (shaft end) of the governor arm |
| 4 | No Cam Signal — LED blinks three (3) times, is OFF for three (3) seconds and then repeats | ||
| 4 | Air Temp. Failure | ||
| 4 | Engine oil level is low. | ||
| 4 flashes of LED | LOW OIL PRESSURE — 4 flashes of LED | Engine oil is low | Check and fill engine oil. Check generator compartment for leaks |
| 5 | System Voltage Low | ||
| 5 | Engine is overheated. | ||
| 5 flashes of LED | HIGH TEMPERATURE — 5 Flashes of LED | Engine oil is low | Check and fill engine oil |
| 5-2 | Engine Speed | No or low fuel; Engine speed below normal operating range | Fill fuel tank; Contact IASD |
| 6 | System Voltage High | ||
| 6 | Defective Low Oil Pressure Switch | ||
| 6 flashes of LED | UNDERSPEED — 6 flashes of LED | Fuel supply is low | Check and replenish fuel supply |
| 6-1 | Engine Oil Pressure | Low oil pressure; Switch voltage not detected | Fill crankcase to correct level; Contact IASD |
| 7 | Cylinder High Temp. | ||
| 7 | Defective Coolant Temperature Switch | ||
| 7 kW | Engine will not crank. | Replace 15A fuse in generator control panel. | |
| 7.5 AMP (F1) FUSE BLOWING | ENGINE WILL NOT CRANK | ||
| 8 | Barometric Pressure Sensor Failure | ||
| 8 | Defective Control Module circuit board | ||
| 8 kW | Engine cranks but will not start. | Tighten, clean or replace as necessary. | |
| 9 | Oil Pressure Anomaly | ||
| 9 | Coolant Level is Low. | ||
| 9 kW | Engine starts hard and runs rough. | ||
| 10 | Defective Low Coolant Level Switch | ||
| 10 | Engine fault code present. | See Fault Code Example or contact IASD. | |
| 10 kW | Auto/Off/Manual switch is set to OFF, but the engine continues to run. | ||
| 11 | Fuel Injector Failure | ||
| 11 | Defective AUTO/OFF/MANUAL switch | ||
| 11 | AUTO/OFF/MANUAL Switch at OFF, engine continues to run. | ||
| 11 | Engine fault code present. | See Fault Code Example or contact IASD. | |
| 11 kW | There is no AC output from the generator. | Reset circuit breaker to ON (or closed). | |
| 12 | Open/disconnected wire #15A between AUTO/OFF/MANUAL switch and Control Module circuit board. | ||
| 12 | No AC output from generator. | ||
| 12 | Engine fault code present. | See Fault Code Example or contact IASD. | |
| 12 kW | There is no transfer to standby after utility source failure. | ||
| 12-1 | No AC output from generator | Main line circuit breaker is tripped/open. Generator internal failure. Thermal circuit breaker open. | |
| 13 | Fuel Pump Failure | ||
| 13 | Engine starts then shuts down. | ||
| 13 kW | Unit consumes large amounts of oil. | ||
| 14 | Output Fault | ||
| 15 | Engine won't crank. | ||
| 15 | Ignition Failure | ||
| 17 | ECU Internal Failure | ||
| 18 | Crankshaft Position Sensor Failure | ||
| 18 | Oil Level Low | Add oil to the specified level before restarting. | |
| 19 | ECU Reset | ||
| 19 | Overload | Reduce load or check if the generator is overloaded. | |
| 22 | Engine Overspeed Failure | ||
| 22 | Oil Level Low | Add oil to the specified level before restarting. | |
| 23 | Electrical Trip | Check the system for any faults and correct them before restarting. | |
| 24 | Load Stability Sensor Failure | ||
| 27 | Stepper Motor Stuck | ||
| 28 | Engine Starting Failure | ||
| 057-243 | Generator Under Volts gives a warning alarm in the event of the generator output falling below the configured Under Volts Pre-Alarm Trip value for longer than the Activation Delay. | ||
| 057-243 | Under Speed Alarm | ||
| 057-243 | Over Speed Pre-Alarm | ||
| 057-243 | Run Away Shutdown alarm is immediately triggered. | ||
| 99 | Maintenance Required | ||
| 180 | Internal Harness Loop Broken—External display board is not able to communicate with main board. This alarm is internal to the display board and is not logged (the main board is not aware of this E-Code). | ||
| 180 | Controller — Internal Harness Loop Broken—External display board is not able to communicate with main board. This alarm is internal to the display board and is not logged (the main board is not aware of this E-Code). | ||
| 801 | Engine will not crank | Correct short circuit condition, replace 7.5A fuse in generator control panel. Tighten, clean or replace battery cables as necessary. Replace defective starter contactor or motor. | |
| 802 | Engine cranks but will not start | Replenish fuel/Turn on fuel valve. Replace defective fuel solenoid or open #14 wire from engine control board. Clean, re-gap or replace spark plugs as necessary. Reset valve lash. Verify choke plate moves freely. | |
| 803 | Engine starts hard and runs rough | Check, replace air cleaner as necessary. Clean, re-gap or replace spark plugs as necessary. Confirm fuel pressure to regulator is 10-12” water column (0.36-0.43 psi) for LP, and 5-7” water column (0.18-0.25 psi) for natural gas. Move selector to correct position. Verify choke plate moves freely. | |
| 804 | AUTO/OFF/MANUAL switch is set to OFF, but the engine continues to run | ||
| 805 | There is no AC output from the generator | Reset circuit breaker to ON (or CLOSED). Contact nearest Dealer for assistance. | |
| 806 | There is no transfer to standby after utility source failure | ||
| 807 | Unit consumes large amounts of oil | Adjust oil to proper level. See 'Engine Oil Recommendations'. Check for oil leaks. | |
| 1001 | Internal Harness Loop Broken—Internal harness connecting external display board to main board has become disconnected. Triggered when main board does not see communication from display board. | ||
| 1001 | Controller — Internal Harness Loop Broken—Internal harness connecting external display board to main board has become disconnected. Triggered when main board does not see communication from display board. | ||
| 1048 | VSCF Overload — Unit shuts down during operation. LED red | Alternator, AVR or wiring is damaged | Contact servicing dealer. |
| 1049 | VSCF Overload — Unit shuts down during operation. LED red | Generator output is shorted or severely overloaded | Identify and clear the overload, and then restart. |
| 1049 VSCF | Overload RED Unit shuts down during operation. | Check the LEDs/Screen for alarms. Generator output is shorted or severely overloaded. Identify and clear the overload, and then restart. | |
| 1051 | VSCF High Battery — Yellow LED illuminated in any state | Voltage supply to the AVR is high | If an external battery charger is in use, contact installing dealer to correct installation. If an external battery charger is NOT in use, contact servicing dealer. |
| 1051 VSCF | High Battery YELLOW LED illuminated in any state. | Check the LEDs/Screen for alarms. Voltage supply to the AVR is high. If an external battery charger is in use, contact installing dealer to correct installation. If an external battery charger is NOT in use, contact Independent Authorized Servicing Dealer. | |
| 1052 | VSCF DC Overvoltage — Unit shuts down during operation. LED red | The generator was temporarily overloaded; The output was temporarily shorted | Try to restart the unit. |
| 1052 VSCF | DC Overvoltage RED Unit shuts down during operation. | Check the LEDs/Screen for alarms. Probable causes are: 1) The generator was temporarily overloaded. 2) The output was temporarily shorted. Try to restart the unit. | |
| 1053 | VSCF Gate Fault — Unit shuts down during operation or starting. LED red | AVR is damaged | Contact servicing dealer. |
| 1053 VSCF | Gate Fault RED Unit shuts down during operation or starting. | Check the LEDs/Screen for alarms. AVR is damaged. Contact Independent Authorized Servicing Dealer. | |
| 1054 | VSCF IGBT Overtemp. — Unit shuts down during operation or starting. | Replace AVR filter. Inspect fan. | Replace AVR filter. Inspect fan. |
| 1055 | VSCF Phase Error — Unit shuts down during starting. LED red | An incorrect voltage and frequency has been detected during starting. Alternator damage. Contact servicing dealer; Generator has started into a severe load. Manually operate generator breaker and try to restart unit. If problem persists, remove load and attempt to restart unit again; The engine may not be reaching its prescribed speed | Contact servicing dealer; Manually operate generator breaker and try to restart unit. If problem persists, remove load and attempt to restart unit again; Verify stepper motor is moving and linkage is free; Verify stepper motor is plugged in; Verify gas pressure is within specified limits |
| 1055 VSCF | Phase Error RED Unit shuts down during starting. | Check the LEDs/Screen for alarms. An incorrect voltage and frequency has been detected during starting. Probable causes are: 1) Alternator damage. Contact Independent Authorized Servicing Dealer. 2) Generator has started into a severe load. Manually operate generator breaker and try to restart unit. If problem persists, remove load and attempt to restart unit again. 3) The engine may not be reaching its prescribed speed. Proceed as follows: •Verify stepper motor is moving and linkage is free. •Verify stepper motor is plugged in. •Verify gas pressure is within specified limits. | |
| 1055 VSCF Phase Error | Unit shuts down during starting. | Check the LEDs/Screen for alarms. An incorrect voltage and frequency has been detected during starting. Probable causes are: 1) Alternator damage. Contact servicing dealer. 2) Generator has started into a severe load. Manually operate generator breaker and try to restart unit. If problem persists, remove load and attempt to restart unit again. 3) The engine may not be reaching its prescribed speed. Proceed as follows: • Verify stepper motor is moving and linkage is free. • Verify stepper motor is plugged in. • Verify gas pressure is within specified limits. | |
| 1056 | VSCF Undervoltage — Unit shuts down during operation or starting. LED red | The generator output voltage is too low. The load is too large. Remove load and attempt to restart unit; Alternator or AVR damage. Contact servicing dealer | Remove load and attempt to restart unit; Contact servicing dealer |
| 1056 VSCF | Undervoltage RED Unit shuts down during operation or starting. | Check the LEDs/Screen for alarms. The generator output voltage is too low. Probable causes are: 1) The load is too large. Remove load and attempt to restart unit. 2) Alternator or AVR damage. Contact Independent Authorized Servicing Dealer. | |
| 1057 | VSCF Overvoltage — Unit shuts down during operation or starting. LED red | The generator has been overloaded. Remove load and attempt to restart unit; Generator has started into a severe load. Manually operate generator breaker and try to restart unit. If problem persists, remove load and attempt to restart unit again | Remove load and attempt to restart unit; Manually operate generator breaker and try to restart unit. If problem persists, remove load and attempt to restart unit again |
| 1057 VSCF | Overvoltage RED Unit shuts down during operation or starting. | Check the LEDs/Screen for alarms. Probable causes are: 1) The generator has been overloaded. Remove load and attempt to restart unit. 2) Generator has started into a severe load. Manually operate generator breaker and try to restart unit. If problem persists, remove load and attempt to restart unit again. | |
| 1058 | VSCF DC Undervoltage — Unit shuts down during operation or starting. LED red | The DPE winding supplies this voltage. Alternator damage. Contact servicing dealer | Contact servicing dealer. |
| 1058 VSCF | DC Undervoltage RED Unit shuts down during operation or starting. | Check the LEDs/Screen for alarms. The DPE winding supplies this voltage. 1) Alternator damage. Contact Independent Authorized Servicing Dealer. | |
| 1059 | VSCF Field Loss — Unit shuts down during starting. LED red | Unit detects no output voltage while starting. Alternator damage. Contact servicing dealer | Contact servicing dealer. |
| 1059 VSCF | Field Loss RED Unit shuts down during starting. | Check the LEDs/Screen for alarms. Unit detects no output voltage while starting. 1) Alternator damage. Contact Independent Authorized Servicing Dealer. | |
| 1060 | Big Fan Failure — Unit shuts down during operation. | This alarm occurs when the AVR electronics temperature exceeds 70 C. AVR filter faulty. | Replace AVR filter. |
| 1061 | VSCF Field Loss — Unit shuts down during operation. LED red | Unit detects loss of output voltage while running. Alternator damage. Contact servicing dealer | Contact servicing dealer. |
| 1061 VSCF | Field Loss RED Unit shuts down during operation. | Check the LEDs/Screen for alarms. Unit detects loss of output voltage while running. 1) Alternator damage. Contact Independent Authorized Servicing Dealer. | |
| 1061 VSCF Field Loss | Unit shuts down during operation. | Check the LEDs/Screen for alarms. Unit detects loss of output voltage while running. Probable causes are: 1) Alternator damage. Contact servicing dealer. | |
| 1065 | Overfrequency — Unit shuts down during operation. LED red | Overload. Remove load and attempt to restart unit; RPM sensor has failed. Contact servicing dealer; Stepper motor problem. Contact servicing dealer | Remove load and attempt to restart unit; Contact servicing dealer |
| 1066 | VSCF Speed mismatch — Unit shuts down during Operation or starting. LED red | Fuel problem (pressure loss). Check fuel supply and attempt to restart unit; Large overload. Remove load and attempt to restart unit; Throttle or engine problem. Contact servicing dealer | Check fuel supply and attempt to restart unit; Remove load and attempt to restart unit; Contact servicing dealer |
| 1066 VSCF | Speed mismatch RED Unit shuts down during Operation or starting. | Check the LEDs/Screen for alarms. Probable causes are: 1) Fuel problem (pressure loss). Check fuel supply and attempt to restart unit. 2) Large overload. Remove load and attempt to restart unit. 3) Throttle or engine problem. Contact Independent Authorized Servicing Dealer. | |
| 1070 | Small fan failure — "Small fan failure" is displayed. If unit was running in AUTO, it will continue to run for one hour to cool electronics without fan. | Small fan current incorrect. Fan wiring or mechanical problem. | Contact Independent Authorized Servicing Dealer. |
| 1100 | Overcrank — Condition - Engine Cranks but will not Start (5 crank attempts). Unit turns over but will not start. Controller is receiving signal on Wire 18. | Unit turns over but will not start. Controller is receiving signal on Wire 18. | Problem 17 |
| 1101 | Overcrank — Engine/Starter Problem. Limiting number of cranking cycles to protect the starter motor. | Limiting number of cranking cycles to protect the starter motor. If the engine has tried to crank for 10 times unsuccessfully, this will trigger. | If the engine has tried to crank for 10 times unsuccessfully, this will trigger. |
| 1200 | Overspeed — Prolonged (60 Hz on a 50 Hz unit, 72Hz on 60Hz unit) Over specified Hz for 3 seconds. | Stepper motor/mixer body assembly issue | Test 12 |
| 1200/1201/1205 | OVERSPEED | TEST 60 AND TEST 64 | |
| 1201 | Overspeed — Prolonged—Throttle stuck open. Over 72 Hz for three seconds with the throttle stuck open. | Stuck throttle | Test 68 |
| 1204 | Overspeed — External Ignition Overspeed. CAN alarm from external ignition, threshold is >30% over nominal. | Test 68 | |
| 1205 | Overspeed — Instantaneous (62 Hz on a 50 Hz unit, 75Hz on 60Hz unit) Over specified Hz for 0.1 second (100 milliseconds). | Stepper motor/mixer body assembly issue | Test 12 |
| 1206 | Overspeed — Instantaneous—Throttle stuck open. Over 75 Hz for one second with the throttle stuck open, total loss of control. | Stuck throttle | Test 68 |
| 1207 | Overspeed — Monitors zero cross timing of the AVR to determine the alternator frequency which is a speed indicator. Set for 150 milliseconds of 4500 rpm or higher. Used if the normal ignition pulse sequence(s) are not being seen by the controller. | Monitors zero cross timing of the AVR to determine the alternator frequency which is a speed indicator. Set for 150 milliseconds of 4500 rpm or higher. Used if the normal ignition pulse sequence(s) are not being seen by the controller | Test 64 and Test 60 |
| 1300 | Low Oil Pressure — Occurred while running. The default Extended alarm for low oil pressure. | Occurred while running. The default Extended alarm for low oil pressure | Check oil level and pressure. Test 61 |
| 1400 | High Temperature — Condition - Air Flow Impeded / Flow Issue | Condition - Air Flow Impeded / Flow Issue | Check the inlet/outlet for debris. Check temperature sensor and wiring. Test 62 |
| 1400 | HIGH TEMP | TEST 62 – CHECK HIGH OIL TEMPERATURE SWITCH; CHECK INSTALLATION FOR PROPER AIRFLOW OR REPLACE DEFECTIVE SWITCH | |
| 1401 | High Temperature — Fuel Pressure Low—Running Lean. Very low fuel pressure while running will cause an increase in engine temperature. Fuel pressure must be measured as low for 1200 ms preceding high temperature alarm to set this E-Code. | Problem 34 | |
| 1500 | Rpm Sensor — Missing Mag Pickup Pulses. | Problem 31 | |
| 1501 | RPM Sensor — Twin Cylinder+Running. Twin Cylinder Running faults to RPM Sensor Loss. | Air pocket in fuel line; dirty fuel; missing ignition pulse (loss of one of the primary coils) | Test 50 and Test 64 |
| 1501/1511 | RUNNING | TEST 64 – CHECK WIRE 18 CONTINUITY | |
| 1505 | RPM Sensor — Twin Cylinder+Cranking. Twin Cylinder Cranking faults to RPM sensor loss. | Starter motor issue; missing ignition pulse (loss of one of the primary coils) | If engine cranks, Test 64. If engine does not crank, Problem 15. |
| 1505/1515 | NO CRANK | GO TO PROBLEM 17 | |
| 1505/1515 | RPM SENSE LOSS | TEST 50 – CHECK FUEL SUPPLY AND PRESSURE; TEST 55 – CHECK FOR IGNITION SPARK; TEST 60 – CHECK IGNITION MAGNETOS | |
| 1511 | RPM Sensor — Single Cylinder+Running. Single Cylinder Running RPM sensor loss. | Air pocket in fuel line; dirty fuel; loss of ignition pulse | Test 50 and Test 64 |
| 1511 | RPM SENSE LOSS — 8 kW SINGLE CYLINDER | TEST 50 – CHECK FUEL SUPPLY AND PRESSURE; TEST 55 – CHECK FOR IGNITION SPARK; TEST 60 – CHECK IGNITION MAGNETOS | |
| 1515 | RPM Sensor — Single Cylinder+Cranking. Single Cylinder Cranking faults to RPM sensor loss. | Starter motor and/or engine issue; loss of ignition pulse | If engine cranks, Test 64. If engine does not crank, Problem 15. |
| 1516 | Rpm Sensor — Cranking + Low Fuel. Cranking with Low Fuel Pressure faults to rpm sensor loss. | Low fuel pressure for at least 1200 ms; ignition fault; air pocket in fuel line; dirty fuel | Problem 34 |
| 1517 | Rpm Sensor — Running + Low Fuel. Running with low fuel pressure faults to rpm sensor loss. | Low fuel pressure for 1200 ms; ignition fault; air pocket in fuel line; dirty fuel | Problem 34 |
| 1518 | Rpm Sensor — No Pulse during Cranking. Rpm sensor loss, no tooth pulses sensed for 75 consecutive milliseconds while starter active. | Starter circuit issue; rpm sensor | Problem 31 |
| 1519 | Rpm Sensor — No Pulse during Running. Cranking faults to rpm sensor loss. | Starter circuit issue; rpm sensor | Problem 31 |
| 1520 | Rpm Sensor — Missing Pulses during Cranking. Cranking faults to rpm sensor loss. Starter engaged, no tooth pulses for 75 ms. | Starter circuit issue; rpm sensor alignment; low battery | Problem 31 |
| 1521 | Rpm Sensor — Missing Pulses during Running. While running, no tooth pulses for 75 consecutive milliseconds. | Rpm sensor alignment; low battery | Problem 31 |
| 1600 | Underspeed — Condition - Unit is Overloaded (55 Hz for 60 Hz for 30 sec, 40 Hz for 50 Hz unit). Unit is Overloaded slowing engine speed. | Fuel supply low; throttle control problem | Problem 3, or Test 50, or Test 12 |
| 1601 | Underspeed — Low Fuel Pressure. Low fuel pressure starves the engine, slowing it. Low fuel pressure detected for 1200 ms before underspeed condition detected. | Check fuel supply and settings; Problem 34 | |
| 1602 | Underspeed — Throttle Stuck Closed/near Closed. The throttle is stuck closed or stuck near closed limiting the fuel to the engine, slowing it down. Stuck closed must be detected for one second with underspeed to set E-Code. | Test 68 | |
| 1603 | Underspeed — The engine never comes up to 3600 RPM. | The engine never comes up to 3700 RPM. | Check fuel selection and fuel supply |
| 1800 | Overvoltage — Prolonged Over-Voltage | Prolonged Over-Voltage | Problem 2; Preliminary Output Voltage Test (firmware v1.12 and above). Note: Update controller to latest firmware. |
| 1800 - 1803 and 2101 | Generator Shuts Down for Overload / Over Voltage | Overloaded; Not overloaded; Shorted condition in a connected load or in one of the load circuits; Load that is causing the problem | Test 24 – Check AC Output Voltage; Test 25 – Check AC Output Frequency; Test 27 – Check Voltage and Frequency Under Load; Test 28 – Check for Overload Condition; Test 12 – Test AC Sensing Circuit; Test 18 – Test Stator; Test 58 – Check Fuel Supply and Pressure; Test 68 – Test Actuator/Mixer Function; Reduce loads to unit's rated capacity; Correct the fuel supply problem; Look for a shorted condition in a connected load or in one of the load circuits; Open all load breakers and bring them on one at a time to determine which branch circuit is the cause of the problem; Discontinue testing; Contact technical service; Repair or replace |
| 1801 | Overvoltage — Instantaneous—Set by an instantaneous measurement 30% over nominal. | Problem 3 | |
| 1803 | Overvoltage — Overspeed. Generator running at higher speed (25% over nominal rpm) causing overvoltage. | Problem 3 | |
| 001810 | Auxiliary Shutdown | ||
| 1900 | Undervoltage — Prolonged Under-Voltage. Undervoltage due to loss of voltage. Below 80% for 10+ seconds. | Prolonged Under-Voltage. Undervoltage due to loss of voltage. Below 80% for 10+ seconds | Preliminary Output Voltage Test (firmware v1.12 and above). Note: Update controller to latest firmware. |
| 1900 - 1906 | Generator Shuts Down for Under Voltage | Test 1 – Test the Main Circuit Breaker; Test 4 – Fixed Excitation Test; Test 5 – Test Field Flash Circuit; Test 6 – Flash Wiring; Test 7 – Test DB1 Diode; Test 8 – Test DB2 Diode; Test 9 – Wire 14 Field Flash Circuit; Test 10 – Test DPE Breaker; Test 11 – Test DPE Circuit; Test 12 – Test AC Sensing Circuit; Test 13 – Test Regulator Output; Test 18 – Test Stator; Test 19 – Test Brushed Rotor Assembly; Perform Rotor Insulation Resistance Test – Section 1.6; Replace controller; Replace stator only; Replace rotor only; Replace rotor and stator; Repair or replace | |
| 1901 | Undervoltage — Instantaneous. Undervoltage due to sudden loss of voltage. (Voltage less than 15 sec 2 sec+) | Instantaneous. Undervoltage due to sudden loss of voltage. (Voltage less than 15 sec 2 sec+) | Preliminary Output Voltage Test (firmware v1.12 and above). Note: Update controller to latest firmware. |
| 1902 | Undervoltage — Both Zero Crosses missing. Undervoltage due to faulty excitation winding, or zero cross circuit, or circuit in general. (Both zero cross missing greater than 1.5 sec) | Loose wiring; field boost hardware failure | Preliminary Output Voltage Test (firmware v1.12 and above). Note: Update controller to latest firmware. |
| 1903 | Undervoltage — Little / No Voltage (<120V). Controller measuring no voltage resulting in undervoltage. Generator voltage less than 120V when undervoltage set. | Problem 1 | |
| 1904 | Undervoltage — No Field Current But Have DPE. No field current during undervoltage alarm. | Wire loose; brush failure | Problem 1 |
| 1905 | Undervoltage — Low Speed. Generator running underspeed for > 30 seconds when undervoltage alarm set. | Fuel supply/control system; engine intake exhaust or mechanical issues | Problem 1 |
| 1906 | Undervoltage — Single Zero Cross missing. Undervoltage due to faulty excitation winding, zero cross circuit, or circuit in general. (One zero cross missing greater than 1.5 sec) | Field boost hardware failure | Preliminary Output Voltage Test (firmware v1.12 and above). Note: Update controller to latest firmware. |
| 1916 | Undervoltage — Single Zero Cross missing. Undervoltage due to faulty excitation winding, or zero cross circuit, or circuit in general. One zero cross missing for greater than 1.5 seconds. | Field boost hardware failure | Problem 1 |
| 2098 | Wiring Error — Mis-wired Customer connection; Insufficient DC voltage on transfer power output. | Shorted 194 to ground | Check for shorted 194 to ground. Refer to RTS Diagnostic Manual A0001176044. |
| 2099 | Wiring Error — Mis-wired. Customer connection low voltage and high voltage wires are crossed. | Mis-wired. Customer connection low voltage and high voltage wires are crossed | Check customer connection in generator |
| 2099 | Wire Error — Incorrect DC AC wiring hook up. | ||
| 2100 | Overload Remove Load — Overloaded - Default (Output Current Method). Unit is overloaded. One or both CT(s) detecting an overload condition. | Overloaded - Default (Output Current Method). Unit is overloaded. One or both CT(s) detecting an overload condition | Check transfer switch loadshed functionality. (Change load dynamics or utilize loadshed). Remove Load |
| 2101 | Overload Remove Load — Overload (DPE Style Field Current Method). Field Current measured value is above threshold. | Overload | |
| 2101 | Overload (DPE Style Field Current Method). Field Current measured value is above threshold. | Overload | |
| 2102 | Overload Remove Load — Overloaded. Unit re-cranks 5 times when load is applied, engine dies (0 RPM) and has low voltage (< 180V) | Unit recranks 5 times when load is applied, engine dies (0 RPM) and has low voltage (< 180V) | Check for Overloaded condition |
| 2103 | Overload Remove Load — Overloaded. Unit has run and attempted to accept load 10 times, could not accept due to overload condition | Unit has run and attempted to accept load 10 times, could not accept due to overload condition | Check for Overloaded condition on unit |
| 2299 | Undervoltage Overload — Unit was overloaded and attempted to start with a large load connected. The unit can not ramp up the generator voltage to its normal target voltage value if it starts with a large load connected | Unit was overloaded and attempted to start with a large load connected. The unit can not ramp up the generator voltage to its normal target voltage | Remove Load |
| 2399 | Stepper Overcurrent — Current flow in stepper coil(s) above specification | Current flow in stepper coil(s) above specification | Test 12 |
| 2400 | Fuse Problem — Missing / Damaged Fuse. The 7.5 amp Controller Fuse is missing or blown (open). *Firmware version 1.11 and older only | The 7.5 amp Controller Fuse is missing or blown (open). | Test 44 |
| 2400 | 7.5 Amp Fuse (F1) Blown | Fuse blows when placed in “AUTO” or “MANUAL” | TEST 66 – CHECK CRANKING AND RUNNING CIRCUITS |
| 002404 | Inspect Spark Arrestor Screen | Inspect and clean the screen every 50 hours of operation or every season, whichever comes first. | |
| 2500 | Bosch — Command and position feedback not matching or taking too much time to achieve. | Governor wire loose; governor module | Test 68 |
| 2501 | Bosch — Stuck Open. Command and position feedback not matching or taking too much time to achieve. Governor in open position for greater than one second. | Governor wire loose; governor module | Test 68 |
| 2502 | Bosch — Stuck Closed. Command and position feedback not matching or taking too much time to achieve. Governor in closed position (commanded otherwise) for greater than one second. | Governor wire loose; governor module | Test 68 |
| 2600 | Ignition — Ignition Fault | Problem 37, 38, 39 | |
| 2601 | Ignition — Missing Cam Pulse—Cam pulses missing for five seconds. | Problem 38 | |
| 2602 | Ignition — Crank Circuit (External Module) | Problem 38, 39 | |
| 2611 | Over current cylinder1 — Coil current too high for one second. | Problem 37 | |
| 2612 | Over current cylinder2 — Coil current too high for one second. | Problem 37 | |
| 2613 | Over current cylinder3 — Coil current too high for one second. | Problem 37 | |
| 2614 | Over current cylinder4 — Coil current too high for one second. | Problem 37 | |
| 2615 | Over current cylinder5 — Coil current too high for one second. | Problem 37 | |
| 2616 | Over current cylinder6 — Coil current too high for one second. | Problem 37 | |
| 2617 | Over current cylinder7 — Coil current too high for one second. | Problem 37 | |
| 2618 | Over current cylinder8 — Coil current too high for one second. | Problem 37 | |
| 2619 | Over current cylinder9 — Coil current too high for one second. | Problem 37 | |
| 2620 | Over current cylinder10 — Coil current too high for one second. | Problem 37 | |
| 2621 | Under current cylinder1 — Coil current too low for one minute. | Problem 37 | |
| 2622 | Under current cylinder2 — Coil current too low for one minute. | Problem 37 | |
| 2623 | Under current cylinder3 — Coil current too low for one minute. | Problem 37 | |
| 2624 | Under current cylinder4 — Coil current too low for one minute. | Problem 37 | |
| 2625 | Under current cylinder5 — Coil current too low for one minute. | Problem 37 | |
| 2626 | Under current cylinder6 — Coil current too low for one minute. | Problem 37 | |
| 2627 | Under current cylinder7 — Coil current too low for one minute. | Problem 37 | |
| 2628 | Under current cylinder8 — Coil current too low for one minute. | Problem 37 | |
| 2629 | Under current cylinder9 — Coil current too low for one minute. | Problem 37 | |
| 2630 | Under current cylinder10 — Coil current too low for one minute. | Problem 37 | |
| 2650 | Internal Ignition Missing Cam — Cranked for four seconds on gaseous unit, no cam pulses detected. | Problem 38 | |
| 2651 | External Ignition Missing Cam — No cam pulses detected by external ignition. | Problem 38 | |
| 2660 | Internal Ignition Missing Crank Pulses — Missing crank pulses detected by internal ignition. | Problem 39 | |
| 2661 | External Ignition Missing Crank Pulses — Missing crank pulses detected by external ignition. | Problem 39 | |
| 2671 | CAN Bus — CANbus error reported by external ignition. | Problem 36 | |
| 2672 | CAN Bus — CANbus error reported by Diesel ECU. | Problem 36 | |
| 2700 | Fuel Level Low — Fuel level below 10% | ||
| 2800 | Aux Shutdown — External shut down circuit is open. | Check the continuity of the harness and operation of the switch(es). Repair/replace as needed. | |
| 005483 | Daños a los equipos y la propiedad. | ||
| 007634 | (000209b) Fallecimiento. Este producto no se ha diseñado para que se utilice en aplicaciones de apoyo vital crítico. En caso de hacerlo, podría provocar la muerte o lesiones graves. | ||
| 007843 | OUTPUT FAULT | ||
| 007846 | Output Fault | ||
| 008034 | Fault Output M | ||
| 9202-1 | Bottom out | ||
| 9203-1 | Bottom out | ||
| 9204-1 | Bottom out | ||
| 9205-1 | Bottom out | Out-the-side | ||
| 9206-1 | Bottom out | Out-the-side | ||
| 9207-1 | NP 6600 120/240 55/27 60 3600 | 2300 | Bottom out |Out-the-side| 89405 | ||
| 009209 | Puesta en marcha automática | ||
| 9290-2 | Bottom out | Bottom out | ||
| 9592-1 | 5500 120/240 Bottom out Universal | ||
| 9593-1 | 7000 120/240 Bottom out Universal | ||
| 9593-2 | 7000 120/240 Bottom out | Universal | ||
| 9600-0 | NP 6600 120/240 55/27 60 3600 | 2700 | Bottom out | Universal 92116 | ||
| 9600-1 | 6600 120/240 Bottom out Universal | ||
| 9677-1 | 7200 120/240 Bottom out Universal | ||
| 9677-2 | 7000 120/240 Bottom out Universal | ||
| 9677-3 | Q 7000 120/240 58/29 60 3600 | 2570 | Bottom out | Universal 92116 | ||
| 9677-4 | Q 7000 120/240 58/29 60 3600 | 2570 | Bottom out | Universal 92116 | ||
| 9712-0 | NP 5000 120/240 41/20 60 3600 | 2751 Bottom out | Universal 92116 | ||
| 9712-1 | NP 5000 120/240 41/20 60 3600 | 2751 Bottom out | Universal 92116 | ||
| 9734-1 | NP 6600 120/240 55/27 60 3600 | 2700 | Bottom out | Universal 92116 | ||
| 9735-1 | Q 5500 120/240 46/23 60 3600 | 2570 | Bottom out | Universal 92116 | ||
| 9736-1 | Q 7000 120/240 58/29 60 3600 | 2570 | Bottom out | ||
| 013428 | Vision Loss | ||
| 020000 | Explosion and Fire | ||
| 020423 | Accidental Start-up | ||
| A | Low engine oil pressure or high engine coolant temperature | See General Troubleshooting — low oil pressure & high engine coolant temperature. | |
| A0006052083 | Calcomanía de escape caliente | ||
| A+C | Engine overspeed or engine underspeed | Check connection on W terminal of DC Charge Alternator—WH/VI to pin-9 on the Power Zone controller; Inspect function of DC charge alternator; Inspect tension of DC charge alternator drive belt; Contact Generac Mobile. | |
| Accy PwrOver Warning | Accy PwrOver Warning — controller internal circuit protection activated | Press OFF to reset; Contact an authorized Kohler distributor/dealer for service | |
| Al | Non-shut down alarm | ||
| Al/Hist. msg 1-16 | Al/Hist. msg 1-16 activity indication (Al/Hist. msg means Alarm/History message) | Al/Hist. msg can be used as a customized message for additional protection configured to any controller internal value. See GenConfig manual - Protections | |
| AUXILIARY SHUTDOWN | Unit will not start in AUTO with utility loss | Check auxiliary shutdown switches | Verify both auxiliary shutdown switches are ON (I). See Figure 3-6 for locations. |
| B+C | Loss of speed | Check connection on W terminal of DC Charge Alternator—WH/VI to pin-9 on the Power Zone controller; Inspect function of DC charge alternator; Inspect tension of DC charge alternator drive belt; Contact Generac Mobile. | |
| Batt volt | Indication of battery voltage protection activity | This protection is based on Analog protect: Batt >V, Batt <V, and Batt volt del setpoints | Check if engine alternator or independent battery charger works properly |
| Battery Charge | Battery Charge — Battery voltage is below 25 V with engine in RUN | ||
| Battery is Dead | Problem 22 – Battery is Dead | Test 45 – Check Battery and Cables | |
| BATTERY PROBLEM | Yellow LED illuminated in any state | Check the screen for additional information | Contact an IASD. |
| BATTERY PROBLEM | Control panel indicates battery problem. | Check for additional information | Contact servicing dealer. |
| Battery Under/Over Voltage | Engine’s DC supply has fallen below or risen above its configured alarm level. | ||
| BREAK IN MAINTENANCE DUE | Control panel indicates break-in maintenance due | Check for additional information | Perform break in maintenance. Clear Maintenance Due light. |
| Break-In Maintenance Due | Control panel indicates break-in maintenance due. | Check for additional information. | Perform break-in maintenance. Clear maintenance due light. |
| BREAK-IN MAINTENANCE DUE | Control panel indicates break-in maintenance due | Check the screen for additional information | Perform |
| C | Fail to crank (AUTO mode only) | See General Troubleshooting — fail to crank. | |
| C1 | Low Oil Pressure Shutdown | Check the engine oil level. | |
| C2 | High Temperature Shutdown | ||
| C4 | Low Voltage Shutdown | Disconnect all loads the generator might power by whatever means provided, such as the recreational vehicle’s main circuit breaker. | |
| CHARGER MISSING AC | Yellow LED illuminated in any state | Contact an IASD | |
| CHARGER PROBLEM | Control panel indicates charging problem. | Check for additional information | Contact servicing dealer |
| CHARGER WARNING | Yellow LED illuminated in any state | Check the screen for additional information | Contact an IASD. |
| Check Engine Fault | A fault not recognized by the controller has been detected. | ||
| Code 0 | Ignition Fault Code 0 | ||
| Control System Fault | Control System Fault — Any control system fault | ||
| DEF Fluid Level | DEF Fluid Level — Steady ON (amber): DEF fluid level is 20%; Slow flash (red): DEF fluid level is 16% or below | ||
| Delayed Engine Shutdown | Delayed Engine Shutdown — DPF outlet temperature is above a set temperature threshold; Engine is cooling | ||
| E1100 | Over Crank - E1100 | Section 4.5, Problem 17 | |
| E1207 | Overspeed - E1207 | Test 64 and Test 60 | |
| E1300 | Low Oil Pressure - E1300 | Test 61 | |
| E1400 | High Temperature - E1400 | Test 62 | |
| E1800 | Overvoltage - E1800 | Section 2.2, Problem 2 | |
| E2099 | Wiring Error - E2099 | Check Wiring Interconnection | |
| E2100 | Overload Remove Load - E2100 | Test 15 | |
| E2299 | Undervoltage Overload - E2299 | Test 15 | |
| EarthFaultCurr | Indication of Earth fault current protection activity | This protection is based on Gener protect: EarthFaultCurr and EthFltCurr del setpoints. Setpoint EarthFltCurrCT from Basic settings group of setpoints is related to this protection too | |
| ECU | Indication of error in communication with ECU | Check if the ECU is: correctly connected to the CAN1 port of the controller (refer to Comap Electronic Engines Support manual for information about ECU connection); powered up; terminating resistors are properly connected; the CAN bus Low and High wires are not swapped | |
| ECUDiagBlocked | Alarm is active when Comms settings: ECU diag = DISABLED. This setting means that ECU alarms are not displayed and considered by controller and this alarm is the setting notification | ||
| Engine Coolant Temperature | Engine Coolant Temperature — Coolant level is above 228 °F (109 °C) | ||
| Engine Emissions Malfunction | Engine Emissions Malfunction — Indicates failure of a critical emissions component. Engine derate: Steady ON: 0%; Slow flash: 50%; Fast flash: 100% | ||
| Engine Intake Temperature | Engine Intake Temperature — Engine intake temperature is above 253 °F (123 °C) | ||
| Engine Oil Pressure | Engine Oil Pressure — Steady ON: Severity level 1—0% derated engine power; Flashing: Severity level 3—100% derated engine power | ||
| Engine Overspeed | Engine Overspeed — Engine rpm exceeds set parameter in EPEC ECU for overspeed, or the engine ECU transmits the overspeed indication; Remains ON until engine cycles through a stopped state; Setpoint: 2,600 rpm | ||
| Engine Stop/Shutdown | Engine Stop/Shutdown — Indicates engine shutdown required for severe system faults/events. | ||
| Engine Warning | Engine Warning — Used to indicate engine and emissions system diagnostics. | ||
| EngProt001 | Overcrank Shutdown | Overcrank LED will turn ON. Turn OFF the AUTO/OFF/MANUAL switch, then turn switch back to AUTO to reset the generator control board | |
| EST 1 | Ac OUTPUT VOLTAGE | ||
| Evolution E-Code 2400 | Engine Will Not Crank When Utility Power Source Fails | Test 44 – Check 7.5 Amp Fuse Evolution Alarm Code 2400 | |
| Evolution Fault codes 1900 - 1906 | Generator Shuts Down for Under Voltage | ||
| F1 | Blown F1 or F2 fuse | Fuse F1 or F2 blown | Check fuse F1 & F2 (Test 30); check N1 & N2 wiring (Test 34); check transformer TX (Test 35); repair or replace; replace |
| F1 | 15 Amp fuse (F1) blown | Fuse blows immediately when replaced; fuse blows when placed in "AUTO" or "MANUAL" | Check battery voltage circuit (Test 75); check cranking and running circuits (Test 76) |
| F1 | Engine cranks but will not start — Open F1 7.5 amp fuse | Open F1 7.5 amp fuse | Replace F1 7.5 amp fuse if fuse blows again. Contact an IASD. |
| F1 | Open F1 7.5 amp fuse | Blown fuse F1 | Replace F1 7.5 amp fuse if fuse blows again. Contact an IASD. |
| F1 | 7.5A (F1) fuse blowing | Fuse blows upon installation | Install new 7.5 amp fuse; check that fuse holder is not grounded; check remote harness wire 15 for short to ground; check choke solenoid and starter contactor; check wire 56 short to ground; check wire 90 short to ground |
| F1 | 10 Amp Fuse (F1) Blowing | Fuse blows upon installation; fuse blows when running; fuse is good but blows when placed to start; start-run-stop switch wired incorrectly; start stop relay (SSR) bad; fuel solenoid bad; starter contactor relay bad; BCR1 and BCR2 wired incorrectly; battery charge rectifier 2 (BCR2) bad; wire 15 bad; wire 15B bad; wire 14 circuit bad; diode/resistor bad; fuel shutoff solenoid (FSS) bad; hourmeter (HM) bad; wire 167 bad | Install new 10 amp fuse; verify start-run-stop switch is wired correctly (see Figure 6-46, pg. 55); check fuel solenoid (Test 47) and starter contactor relay (Test 44); verify BCR1 and BCR2 are wired correctly; repair or replace wire 14; correct wiring; repair or replace; replace |
| F1/F2 | Blown F1 or F2 Fuse | Test 28 – Check Fuse F1 & F2; Test 32 – Check N1 & N2 Wiring; inspect/replace controller; finish; repair or replace wiring | |
| F2 | Blown F1 or F2 fuse | Fuse F1 or F2 blown | Check fuse F1 & F2 (Test 30); check N1 & N2 wiring (Test 34); check transformer TX (Test 35); repair or replace; replace |
| F2 | Engine cranks but will not start — Open F2 15 amp fuse | Open F2 15 amp fuse | Replace F2 15 amp fuse if fuse blows again. Contact an IASD. |
| F2 | Open F2 15 amp fuse | Replace F2 15 amp fuse if fuse blows again. Contact an IASD. | |
| Fail to Start | Fail to Start — engine does not start and run within three starting cycles; LCD screen displays the "Fail to Start" alarm | The starting sequence can be repeated after the starter cools for at least two minutes. Pressing the Stop (O) button will clear the alarm and reset the controller. | |
| FAULT_01 | Generator Produces Zero Voltage or Residual Voltage | ||
| FAULT_02 | Generator Produces Low Voltage at No-Load | ||
| FAULT_03 | Generator Produces High Voltage at No-Load | ||
| FAULT_04 | Voltage and Frequency Drop Excessively When Loads Are Applied | ||
| FIRE | FIRE | ||
| Fuel Not Ready | Fuel Not Ready — normal during a controller power loss; clears automatically in 30 seconds; user unable to start the unit during this time | ||
| FuelSys006 | Fuel System Fault | ||
| FUSE PROBLEM | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Check the 7.5 amp fuse. If it is blown, replace it with an ATO 7.5 amp fuse. If the fuse is intact, contact an IASD. |
| FXXX | Indicates a fault state. The DVR stops providing excitation. | ||
| Gen I unbal | Generator voltage unbalance alarm | Based on Gener protect: Gen V unbal and Gen V unb del setpoints | |
| Gen V unbal | Generator voltage unbalance alarm | Based on Gener protect: Gen V unbal and Gen V unb del setpoints. The voltage unbalance is calculated as a maximum difference between phase voltages | |
| Generator Will Not Exercise | Problem 20 – Generator Will Not Exercise | Test 45 – Check Battery and Cables | |
| H01 | Low Coolant Level | Add coolant to the proper level. | |
| H02 | High Coolant Temperature | Reduce load or allow engine to cool. | |
| H03 | Low Engine Oil Pressure | Check and add oil if necessary, or replace oil filter. | |
| H04 | Overspeed Shutdown | Reduce load immediately to prevent engine damage. | |
| H05 | Overcrank Shutdown | Check fuel system and ignition components. | |
| H06 | RPM Sensor Loss Shutdown | Check RPM sensor connections and replace if necessary. | |
| H07 | Low Fuel Pressure Warning | Check fuel system for leaks or blockages. | |
| High Exhaust Temperature (HEST) | High Exhaust Temperature (HEST) — Engine is NOT at idle and the engine ECU is requesting high idle (typically, 1,200 rpm); Control system has granted permission for high idle state; Typical when DPF is above 80% soot load | ||
| HIGH TEMP | Shutdown alarm/fault occurred — High temp | High oil temperature switch faulty | Test 76 - Check high oil temperature switch; check installation for proper airflow or replace defective switch |
| HIGH TEMPERATURE | Unit shuts down during operation — LED red | Check the LEDs / screen for alarms | Check ventilation around the generator, intake, exhaust, and rear of generator. If no obstructions are present, contact an IASD. |
| HTO | High Temp Switch | ||
| HTO | High Oil Temperature | ||
| Hydraulic Oil Level Low | Hydraulic Oil Level Low — Low hydraulic oil level | ||
| Hydraulic Oil Temperature | Hydraulic Oil Temperature — Tank >160 °F (71 °C) or oil stream >200 °F (93 °C); Tank >170 °F (77 °C) or oil stream >210 °F (99 °C); High-temperature cut-out switch open | ||
| Hydraulic Return Filter | Hydraulic Return Filter — Filter condition | ||
| IDMT ALARM | If the Over Current IDMT Alarm is enabled, the controller begins following the IDMT ‘curve’ when the current on any phase passes the Trip setting. If the Trip is surpassed for an excess amount of time, the IDMT Alarm triggers (Shutdown or Electrical Trip as selected in Action). The larger the over circuit fault, the faster the trip. | Generator current exceeds the trip level and remains above it for a duration that surpasses the set threshold. | |
| IMMEDIATE WARNING | If the Immediate Warning is enabled, the controller generates a warning alarm as soon as the Trip level is reached. The alarm automatically resets once the generator loading current falls below the Trip level (unless All Warnings are latched is enabled). | Generator current exceeds the trip level. | |
| INSPECT BATTERY | Yellow LED illuminated in any state | Check the screen for additional information | Inspect battery. Press ENTER to clear. |
| Inspect Battery | Yellow LED illuminated in any state — Inspect Battery | Inspect Battery, hit ENTER to clear. | |
| LOP | Low Oil Pressure Switch | ||
| LOW BATTERY | Yellow LED illuminated in any state | Check the screen for additional information | Clear alarm. Using the control panel, check the battery by navigating to the BATTERY MENU option from the MAIN MENU. If battery condition displays GOOD, contact an IASD. If control panel displays CHECK BATTERY, replace the battery. |
| LOW BATTERY | Shutdown alarm/fault occurred — Low battery | Battery charging system fault | Proceed to Problems 10-13 |
| Low Diesel Fuel | Low Diesel Fuel — Steady ON (amber): Fuel level is 20%; Slow flash (red): Fuel level is 16%; Fast flash (red): Fuel level is 12% or below | ||
| Low Fuel Level | Engine’s fuel level has fallen below its configured low fuel level alarm. | ||
| LOW FUEL LEVEL SHUT DOWN | Engine automatically shuts down. | Fuel level is low, fuel tank has leaks, or fuel level sender is damaged. | Check the fuel level on the LCD window. Confirm that the generator is sitting level to ensure an accurate reading. Check for leaks in the fuel tank. If the fuel level is good and no leaks are found, check the fuel level sender and the connecting wiring for damage. |
| LOW OIL | Shutdown alarm/fault occurred — Low oil | Oil pressure switch and wire 86 faulty | Test 75 - Check oil pressure switch and wire 86; repair or replace |
| LOW OIL LEVEL | Unit will not start in AUTO with utility loss. | Check for alarms | Check oil level. Add oil per Owner’s Manual. Contact servicing dealer if oil level is correct. |
| LOW OIL PRESSURE | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Check oil level and add oil as needed. If oil level is correct, contact an IASD. |
| Low Oil Pressure | Engine oil pressure has fallen below its configured low oil pressure alarm level. | ||
| LOW VOLTS REMOVE LOAD | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Clear alarm and remove household loads from the generator. Put in AUTO and restart. |
| M01 | Low Oil Pressure Shutdown | Check the engine oil level. If necessary, add oil to the FULL mark. | |
| M02 | High Temperature Shutdown | ||
| M03 | Overspeed Shutdown | Do not attempt a manual adjustment to control engine speed. | |
| M04 | Low Voltage Shutdown | ||
| MainPwrOverL Shutdown | MainPwrOverL Shutdown — controller internal circuit protection activated | Press OFF to reset; Contact an authorized Kohler distributor/dealer for service | |
| Mains Earth Fault | Generator earth fault current rose above the Mains Earth Fault Trip Level for the duration of the IDMT function. | ||
| Mains Over Current | Mains output current rose above the Mains Over Current Trip level. | ||
| Mains Phase Seq Wrong | Phase rotation of mains was different to configured Mains Phase Rotation Alarm setting. | ||
| Menu | Menu | ||
| MISWIRE | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| No E-code on HSB | Controller Fault | Replace Controller | |
| NO LEDs LIT | Unit will not start in AUTO with utility loss. | Check for alarms | Check ATO 7.5 Amp ATO® fuse. Replace with same type fuse if bad. Contact servicing dealer if fuse is good. |
| No Low Speed Exercise | Problem 21 – No Low Speed Exercise | ||
| NO RPM SENSE | Shutdown alarm/fault occurred — No RPM sense | No signal | Repair or replace |
| NOT ACTIVATED | Unit will not start in AUTO with remote start signal — LED none | Check if screen says unit not activated | Refer to “Activation” in installation manual. |
| OC | Field boost voltage is available. | ||
| Other | Multiple | Contact IASD | |
| Otro | Múltiple | Comuníquese con un IASD. | |
| Over Speed Alarm | Shutdown alarm in the event of the engine speed rising above the configured Over Speed Alarm Trip value for longer than the Activation Delay. | ||
| Over Speed Pre-Alarm | Warning alarm in the event of the engine speed rising above the configured Over Speed Pre-Alarm Trip value for longer than the Activation Delay. The Warning is automatically reset when the engine speed falls below the configured Return level. | ||
| OVER VOLTAGE | Unit will not start in AUTO with utility loss | ||
| OVERCRANK | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Check fuel line shutoff valve is ON. Clear alarm. Start the unit in MANUAL. If it does not start, or starts and runs rough, contact an IASD. |
| OVERCRANK | Shutdown alarm/fault occurred — Overcrank | Engine cranking fault | Proceed to Problem 16 |
| OVERLOAD | Unit shuts down during operation | Clear alarm and remove loads from generator. Put back in AUTO and restart. | |
| OVERLOAD REMOVE LOAD | Unit shuts down during operation — LED red | Check the LEDs / screen for alarms | Clear alarm and remove household loads from the generator. Put in AUTO and restart. |
| OVERLOAD REMOVE LOAD | Unit will not start in AUTO with utility loss — OVERLOAD REMOVE LOAD | Overload condition | Clear alarm and remove household loads from the generator. Put back in AUTO and restart. |
| OVERSPEED | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| OVERSPEED | Shutdown alarm/fault occurred — Overspeed | Engine governor out of adjustment | Test 15 - Check and adjust engine governor; repair linkage if binding, check throttle operation |
| Overspeed | Engine speed has risen above its configured overspeed alarm level. | ||
| Overspeed shutdown. | Overspeed shutdown. | Check governor and throttle linkages for freedom of movement. Check overspeed switch. | |
| OVERSPEED UNDERSPEED | Unit will not start in AUTO with utility loss. | Check for alarms | Contact servicing dealer. |
| OVERVOLTAGE | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| P0134 | Oxygen sensor has not toggled between indicating lean and indicating rich for at least one minute — displays Malfunction Indicator Light (MIL) message CHECK ENGINE on the H-100 control panel display; does not generate audible alarms | Automatically clears after three run cycles (three times fully starting the unit and then completely shutting it down) in which no DTC conditions are active; a GMPASD can also clear the DTC through GenLink | |
| P0300 | Cylinder Misfire Detected | ||
| P1034 | Oxygen Sensor has not toggled between indicating lean and indicating rich for at least 1 minute | ||
| Problem 10 | In Automatic Mode, No Transfer to Standby | Perform Test 26 – Check Manual Transfer Switch Operation (50 Amp Switch Only); Test 27 – Check Voltage at Transfer Switch; Test 28 – Test Transfer Operator (GenReady Switch Only); Test 29 – Check Wire 15B/194 Circuit; Test 30 – Check Wire 23 Circuit; replace transfer operator; replace controller; find cause of no AC output to transfer switch from generator; repair or replace as needed | |
| Problem 11 | In Automatic Mode, Generator Starts When Loss of Utility Occurs, Generator Shuts Down When Utility Returns But There is No Retransfer to Utility Power Or Generator Transfers to Standby During Exercise or in Manual Mode | ||
| Problem 12 | Blown F1 or F2 Fuse | Test 32 – Check Fuse F1 & F2; Test 33 – Check N1 & N2 Wiring; repair or replace wiring; inspect/replace controller; finish | |
| Problem 13 | Blown T1 Fuse | Test 35 – Check Fuse F3 (T1); Test 36 – Check T1 Wiring; repair or replace wiring; replace controller; stop testing | |
| Problem 14 | Unit Starts and Transfer Occurs When Utility Power Is On | Test 41 – Check Utility Sensing Voltage at Controller; Test 38 – Check N1 & N2 Voltage; Test 39 – Check Utility Sense Voltage; Test 32 – Check Fuse F1 & F2; replace controller; correct utility source voltage; replace; go to Problem 7; repair or replace wiring; repair or replace wire N1A/N2A between N1/N2 lugs and fuse holder; repair N1/N2 open wiring between transfer switch and generator; check meter settings and functionality | |
| Problem 18 | Shutdown Alarm/Fault Occurred | ||
| Problem 20 | Engine Will Not Crank When Utility Power Source Fails | Verify utility source is "OFF"; Test 52 – Check Position of Auto-Off-Manual Mode; Test 53 – Try a Manual Start; if switch is in "AUTO" and engine does not crank, go to Problem 21; if switch is "OFF", set to "AUTO" - retest; if switch is "ON", turn "OFF" - retest; replace controller assembly; Test 55 – Check 7.5 Amp Fuse; Test 56 – Check Battery; Test 58 – Check Starter Contactor; Test 59 – Test Starter Motor; recharge/replace; replace | |
| Problem 21 | Engine Will Not Crank When Controller is Set to "MANUAL" Mode | Test 55 – Check 7.5 Amp Fuse; Test 56 – Check Battery; Test 57 – Check Wire 56 Voltage; Test 58 – Check Starter Contactor; Test 59 – Test Starter Motor; replace controller assembly; recharge/replace; replace | |
| Problem 22 | Engine Cranks but Won't Start | Check air filter - replace as needed; Test 60 – Check Fuel Supply and Pressure; Test 61 – Check Controller Wire 14 Output; Test 62 – Check Fuel Solenoid; Test 63 – Check Choke Solenoid; Test 64 – Check for Ignition Spark; Test 65 – Check Spark Plugs; Test 66 – Check Engine Compression; Test 67 – Check Ignition Magneto; Test 70 – Check and Adjust Valves; Test 79 – Check Shutdown Wire; contact technical service; replace choke solenoid; clean, regap or replace; replace controller; replace fuel solenoid; replace fuel regulator; adjust or replace; repair or replace shorted wire 18 or controller; check flywheel key; find and correct cause of no fuel or low pressure; readjust | |
| Problem 23 | Engine Starts Hard and Runs Rough / Lacks Power / Backfires | Check air filter - replace as needed; Test 60 – Check Fuel Supply and Pressure; Test 63 – Check Choke Solenoid; Test 64 – Check for Ignition Spark; Test 65 – Check Spark Plugs; Test 66 – Check Engine Compression; Test 67 – Check Ignition Magnetos; Test 70 – Check and Adjust Valves; Test 13 – Check and Adjust Engine Governor; if reconfigured to LP gas, verify that proper procedure was followed (refer to Section 1.3); check flywheel key; replace choke solenoid; refer to engine service manual; readjust; adjust or replace; clean, regap or replace; find and correct cause of no fuel or low pressure | |
| Problem 24 | Shutdown Alarm/Fault Occurred — Low Oil CorePower | Test 68A – Check Oil Pressure Switch and Wire 86 | |
| Problem 25 | 7.5 Amp Fuse (F1) Blown — fuse blows when placed in "AUTO" or "MANUAL" | Test 73 – Check Cranking and Running Circuits | |
| Problem 26 | Generator Will Not Exercise | Test 72 – Test Exercise Function; replace printed controller; repair or replace | |
| Problem 27 | No Battery Charge — no battery supply voltage | Test 74 – Check Battery Charger Supply Voltage; Test 75 – Check Battery Charger Output Voltage; Test 78 – Check Wire 0/15B; repair or replace; replace charger | |
| QA | W WARNING | ||
| Regen Inhibit | Regen Inhibit — Control system not allowing high idle that engine has requested | ||
| RPM SENSE LOSS | Unit was running and shut down, attempts to restart — LED red | Check the LEDs / screen for alarms | Clear alarm and remove household loads from the generator. Put into AUTO and restart. If generator does not start, contact an IASD. |
| RPM SENSE LOSS | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Clear alarm. Using the control panel, check the battery by navigating to the BATTERY MENU option from the MAIN MENU. If battery condition displays GOOD, contact an IASD. If control panel displays CHECK BATTERY, replace the battery. |
| RTCbatteryFlat | This warning message "RTCbatteryFlat" appears in Alarmlist when battery is close to be completely flat | If power supply cut comes when the RTC battery is flat, the statistic values, history and setpoints settings are lost | Send a controller to your distributor for battery exchange if the RTCbatteryFlat message is displayed |
| Run Away | In the event of the generator output frequency rising above the configured Trip value, the Run Away Shutdown alarm is immediately triggered. This is used to protect against engine damage due to uncontrolled speed increase. | Generator output frequency exceeds the configured trip value. | |
| Run Away | Immediate Shutdown alarm triggered when the engine speed rises above the configured Trip value. | ||
| S1 | Overspeed Shutdown | Do not attempt a manual adjustment to control the engine speed. | |
| SD | Shut down alarm | ||
| Sd ECU | Sd ECU — normal during a controller power loss; can be cleared immediately | ||
| SERVICE A | Yellow LED illuminated in any state | Check the screen for additional information | Perform SERVICE A maintenance. Press ENTER to clear. |
| SERVICE B | Yellow LED illuminated in any state | Check the screen for additional information | Perform SERVICE B maintenance. Press ENTER to clear. |
| Service Due | Service Due — Service is due for one or more of: Engine oil; Air filter; Engine fuel filter; Hydraulic oil filters | See Draining Fluids—Union Fluid Drain. | |
| SERVICE SCHEDULE A | Warning active | Perform SERVICE SCHEDULE A maintenance; press ENTER to clear. | |
| SERVICE SCHEDULE B | Warning active | Perform SERVICE SCHEDULE B maintenance; press ENTER to clear. | |
| SERVICE SCHEDULE C | Warning active | Perform SERVICE SCHEDULE C maintenance; press ENTER to clear. | |
| SHAinCfgErr | Shared Analog module configuration error | More than one source module (SHAOUT) were configured (on the CAN2 bus) | Make sure that only one SHAOUT x module is configured in controllers |
| Short Circuit IDMT Alarm | Generator output current rose above the Short Circuit Trip for the duration of the IDMT function. | ||
| SHUTDOWN SWITCH | Unit will not start — LED flashing red | Set emergency shutdown switch(es) to CLOSED (I). Clear alarm | |
| SMM Problem 1 | Load Management Module (SMM) LED is OFF, Load Not Powered | Verify utility available and/or generator on; enable MLCB and/or verify generator operation; enable circuit breaker; check wiring to SMM and connections inside SMM; line voltage must connect to the left side of the contactor, load to the right side; retest | |
| SMM Problem 2 | Load Management Module (SMM) LED is ON, Load Not Powered | Generator was overloaded, shed occurred and power applied to SMM; this will also occur if utility power was just applied (except if transferring from gen to utility) | Test 37 – Check Voltage at Contactor |
| SMM Problem 3 | Load Management Module (SMM) LED is Flashing, Load Not Powered — LED flashing 1 second interval | Generator overloaded while attempting recovery from shedding | Wait 5 minutes plus the priority time delay for SMM to enable output; review all enabled loads; disable suspect loads to prevent overload from recurring |
| SMM Problem 4 | Load Management Module (SMM) is Humming or Buzzing — humming sound coming from SMM, load not powered | Improper mounting or incorrect connections | Mount securely to wall or vertical surface with arrows pointing up only; note: PMM must have 240 VAC to operate correctly; Test 37 – Check Voltage at Contactor |
| Start Fail Alarm | Start Fail Alarm — controller alarm sounds and LCD window displays "Start Fail Alarm" after three start attempts | Engine fails to start after a pre-specified duration of cranking (three crank cycles of 15 seconds each, followed by a 15 second pause to cool the starter). | |
| STEPPER OVERCURRENT | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| T1 | Blown T1 fuse | ||
| T1 | High Temperature Shutdown | ||
| TDN | HTS has detected utility present, but loss of communications with the H-100 Control Panel. | ||
| TEST 2 | VOLTAGE REGULATOR LAMPS | ||
| TEST 3 | REPLACE VOLTAGE REGULATOR | ||
| TEST 4 | TEST EXCITATION CIRCUIT BREAKER | ||
| TEST 5 | TEST EXCITATION WINDING | ||
| TEST 6 | TEST THERMAL PROTECTOR | ||
| TEST 7 | TEST EXCITATION LEADS | ||
| TEST 8 | REGULATOR TEST & ADJUST | ||
| TEST 9 | CHECK SENSING LEADS TRANSFORMER POWER WINDINGS | ||
| TEST 10 | STATOR AC GOOD | ||
| TEST 11 | TEST Rotor Brushes AND Wires No. 1 & 4 BOOST | ||
| TEST 12 | CHECK FIELD | ||
| TEST 13 | CHECK SLIP RINGS 1 AND 4 | ||
| TEST 14 | RECONNECT, REPAIR OR REPLACE BAD WIRE(S) OR PART(S) | ||
| TEST 15 | CHECK BOTH VOLTAGE AND FREQUENCY | ||
| TEST 16 | ADJUST ENGINE GOVERNOR | ||
| TEST 17 | CHECK VOLTAGE REGULATOR | ||
| TEST 18 | UNIT IS NOT OVERLOADED | ||
| TEST 19 | REPAIR ENGINE POWER | ||
| Trblsht003 | Defective Control Module circuit board | Replace board. | |
| UNDER SPEED | Unit will not start in AUTO with utility loss | ||
| Under Speed Alarm | Shutdown or Warning depending on configuration: The engine speed falling below the configured Under Speed Alarm Trip value for longer than the Activation Delay. | ||
| UNDER VOLTAGE | Unit will not start in AUTO with utility loss | Check the LEDs/Screen for alarms. | Contact Independent Authorized Servicing Dealer. |
| UNDERSPEED | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| Underspeed | Engine speed has fallen below its configured underspeed alarm level. | ||
| UNDERSPEED - 6 FLASHES OF LED | 6 flashes of LED | Please reference Appendix 1, Troubleshooting, if this fault occurs. | |
| UNDERVOLTAGE | Unit will not start in AUTO with remote start signal — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| V1 | Low Voltage Shutdown | ||
| W000146 | Do not alter construction of, installation, or block ventilation for generator. Failure to do so could result in unsafe operation or damage to the generator. | ||
| W000163 | Do not open or mutilate batteries. Batteries contain electrolyte solution which can cause burns and blindness. If electrolyte contacts skin or eyes, flush with water and seek immediate medical attention. | ||
| W000209 | Loss of life. | ||
| Water In Fuel | Water In Fuel — Water detected in fuel | ||
| WIRING ERROR | Unit will not start in AUTO with utility loss. | Check for alarms | Contact servicing dealer. |
| Wrong config | Wrong controller configuration indication. Indicates that controller hardware doesn't support PLC used in configuration | To check it send the IDch and Dngl strings from controller Info screen 2 and archive to your technical support | |
| YELLOW | Yellow LED illuminated in any state. | Check the screen for additional information. Perform SERVICE A maintenance. Press ENTER to clear. |
Compiled from Generac service manuals and controller documentation. 37 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.
Utility failure. Remedy: Crank and start engine, transfer load to Generator if Utility returns above 75% nominal for 15 seconds.
Engine won’t crank.. Remedy: Replace fuse..
Engine cranks but won't start. Remedy: Tighten, clean or replace battery cables; replace starter contactor or motor; replace battery if dead..
Engine cranks but won't start. Remedy: Tighten, clean or replace battery cables; replace starter contactor or motor; replace battery if dead..
CO Monitor. Remedy: Move generator outside. Contact IASD..
Battery Voltage. Cause: Battery voltage above normal operating range. Remedy: Contact IASD.
Battery Voltage. Cause: Battery voltage below normal operating range. Remedy: Charge battery to correct level.
OVERCRANK — 2 flashes of LED. Cause: No fuel to the engine. Remedy: Make sure that the tanks are full and the valves are opened.
OVERSPEED — 3 flashes of LED. Cause: Governor spring is disconnected. Remedy: Reconnect spring. Spring should be in the second hole from the bottom (shaft end) of the governor arm.
LOW OIL PRESSURE — 4 flashes of LED. Cause: Engine oil is low. Remedy: Check and fill engine oil. Check generator compartment for leaks.
HIGH TEMPERATURE — 5 Flashes of LED. Cause: Engine oil is low. Remedy: Check and fill engine oil.
Engine Speed. Cause: No or low fuel; Engine speed below normal operating range. Remedy: Fill fuel tank; Contact IASD.
UNDERSPEED — 6 flashes of LED. Cause: Fuel supply is low. Remedy: Check and replenish fuel supply.
Engine Oil Pressure. Cause: Low oil pressure; Switch voltage not detected. Remedy: Fill crankcase to correct level; Contact IASD.