These E-codes cover a range of potential issues, including engine faults, voltage irregularities, sensor failures, wiring errors, and more. By displaying the appropriate E-code, the generator communicates the nature of the problem, allowing users to take appropriate action, such as performing maintenance tasks or contacting a service provider for further assistance.
Understanding the E-codes can significantly streamline the troubleshooting process, minimizing downtime and ensuring the generator operates reliably when needed most. Additionally, Generac often provides detailed documentation and support resources to accompany the E-codes, further empowering users to address issues effectively and maintain their generator in optimal condition.
| Displayed Alarm | Alarm/Warning | e-Code Breakdown | Description |
|---|---|---|---|
| Controller Fault | ALARM | No E-code on HSB | |
| Overcrank | ALARM | 1100 | Condition - Engine Cranks but will not Start (5 crank attempts) Unit turns over but will not start. Controller is receiving signal on Wire 18. |
| Overspeed | ALARM | 1200 | Prolonged (60 Hz on a 50 Hz unit, 72Hz on 60Hz unit) Over specified Hz for 3 seconds. Possible cause: Stepper motor/mixer body assembly issue. |
| Overspeed | ALARM | 1205 | Instantaneous (62 Hz on a 50 Hz unit, 75Hz on 60Hz unit) Over specified Hz for 0.1 second (100 milliseconds). Possible cause: Stepper motor/ mixer body assembly issue. |
| Overspeed | ALARM | 1207 | 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. |
| Low Oil Pressure | ALARM | 1300 | Occurred while running The default Extended alarm for low oil pressure. Check oil level and pressure. |
| High Temperature | ALARM | 1400 | Condition - Air Flow Impeded / Flow Issue Check the inlet/outlet for debris. Check temperature sensor and wiring. |
| RPM Sensor | ALARM | 1501 | Twin Cylinder+Running Twin Cylinder Running faults to RPM Sensor Loss. Possible Causes: air pocket in fuel line, dirty fuel, missing ignition pulse (loss of one of the primary coils). |
| RPM Sensor | ALARM | 1505 | Twin Cylinder+Cranking Twin Cylinder Cranking faults to RPM sensor loss Possible Cause: starter motor issue, missing ignition pulse (loss of one of the primary coils). |
| RPM Sensor | ALARM | 1511 | Single Cylinder+Running Single Cylinder Running RPM sensor loss Possible Causes: air pocket in fuel line, dirty fuel. Loss of ignition pulse. |
| RPM Sensor | ALARM | 1515 | Single Cylinder+Cranking Single Cylinder Cranking faults to RPM sensor loss Possible Cause: starter motor and/or engine issue. Loss of ignition pulse. |
| Underspeed | ALARM | 1600 | 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 or throttle control problem. |
| Underspeed | ALARM | 1603 | Underspeed The engine never comes up to 3600 RPM. |
| Overvoltage | ALARM | 1800 | Prolonged Over-Voltage |
| Undervoltage | ALARM | 1900 | Prolonged Under-Voltage Undervoltage due to loss of voltage. Below 80% for 10+ seconds) |
| Undervoltage | ALARM | 1901 | Instantaneous Undervoltage due to sudden loss of voltage. (Voltage less than 15 sec 2 sec+) |
| Undervoltage | ALARM | 1902 | Both Zero Crosses missing Undervoltage due to faulty excitation winding, or zero cross circuit, or circuit in general. Possible cause: loose wiring, field boost hardware failure. (Both zero cross missing greater than 1.5 sec) |
| Undervoltage | ALARM | 1906 | Single Zero Cross missing Undervoltage due to faulty excitation winding, zero cross circuit, or circuit in general. Possible cause: field boost hardware failure. (One zero cross missing greater than 1.5 sec) |
| Wiring Error | ALARM | 2099 | Mis-wired Customer connection low voltage and high voltage wires are crossed. |
| Overload Remove Load | ALARM | 2100 | 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). |
| Undervoltage Overload | ALARM | 2299 | 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 |
| Stepper Overcurrent | ALARM | 2399 | Current flow in stepper coil(s) above specification |
| Fuse Problem | ALARM | 2400* | Missing / Damaged Fuse The 7.5 amp Controller Fuse is missing or blown (open). *Firmware version 1.11 and older only |
| Aux Shutdown | ALARM | 2800 | External shut down circuit is open. |
| Low Battery | WARNING | Condition->Battery less than 12.1 Volts for 60 seconds | |
| Battery Problem | WARNING | Condition->More than 16 Volts of battery voltage or 600 milliamperes or more of charge current at the end of an 18 hour charge | |
| Charger Warning | WARNING | Less than 12.5 volts of battery voltage at the end of a 18 hour charge | |
| Charger Missing AC | WARNING | AC power is missing from the battery charger input | |
| Service Schedule | Service Schedule A 200hours 2 years Service Schedule B 400 Hours 4 years | ||
| Overcrank | ALARM | 1101 | Engine/Starter Problem Limiting number of cranking cycles to protect the starter motor. |
| Overload Remove Load | ALARM | 2102 | Overloaded Unit re-cranks 5 times when load is applied, engine dies (0 RPM) and has low voltage (< 180V) |
| Overload Remove Load | ALARM | 2103 | Overloaded Unit has run and attempted to accept load 10 times, could not accept due to overload condition |