Generac 15 kW EcoGen troubleshooting: 40 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Generac 15 kW EcoGen — full specs, parts & maintenance.
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| 1048 | Unit shuts down during operation. | Alternator, AVR or wiring is damaged. | Contact servicing dealer. |
| 1051 | 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. | |
| 1052 | Unit shuts down during operation or starting. | Probable causes are: 1) The generator was temporarily overloaded. 2) The output was temporarily shorted. Try to restart the unit. | |
| 1055 | Unit shuts down during starting. | 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. | |
| 1059 | Unit detects no output voltage while starting. | Alternator damage. Contact servicing dealer. | |
| 1061 | Unit detects loss of output voltage while running. | Alternator damage. Contact servicing dealer. | |
| 1070 | "Small fan failure" is displayed. | Small fan current incorrect. Probable causes are: 1) Fan wiring or mechanical problem. Contact servicing dealer. 2) Air path is blocked. Check AVR filter. | |
| RPM SENSE LOSS | Unit was running and shut down, attempts to restart. | 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. | |
| LOW OIL PRESSURE | Unit will not start in AUTO with remote start signal. | Check the LEDs / screen for alarms. Check oil level and add oil as needed. If oil level is correct, contact an IASD. |
| Symptom | Cause | Remedy |
|---|---|---|
| Unit will not start in AUTO with 2-wire start signal. | Check the LEDs/Screen for alarms. Contact servicing dealer. | |
| LOW BATTERY | Yellow LED illuminated in any state. Check screen for additional information. Clear alarm. Navigate to the BATTERY MENU on the control pad LCD. Contact servicing dealer if battery is GOOD. Replace battery If CHECK BATTERY is displayed. | |
| BATTERY PROBLEM | Yellow LED illuminated in any state. Check screen for additional information. Contact servicing dealer. | |
| CHARGER WARNING | Yellow LED illuminated in any state. Check screen for additional information. Contact servicing dealer | |
| SERVICE A | Yellow LED illuminated in any state. Check screen for additional information. Perform SCHEDULE A maintenance. Press ENTER to clear. | |
| SERVICE B | Yellow LED illuminated in any state. Check screen for additional information. Perform SCHEDULE B maintenance. Press ENTER to clear. | |
| INSPECT BATTERY | Yellow LED illuminated in any state. Check screen for additional information. Inspect battery. Press ENTER to clear. | |
| Generator stalls when large load is supplied. | Total load is too big for the generator. Loads must be less than 10 kW or 2 hp when operating under 3600 rpm.Contact installing dealer to correct installation. | |
| Output voltage is low/high. | Voltage calibration incorrect. Contact servicing dealer. | |
| Generator does not pull full power. | Current calibration incorrect. Contact servicing dealer. | |
| Engine will not crank. | 1) Fuse blown. 2) Loose, corroded or defective battery cables. 3) Defective starter contact. 4) Defective starter motor. 5) Dead Battery. | 1) Correct short circuit condition by replacing 7.5 Amp fuse. 2) Tighten, clean or replace as necessary.* 3) Tighten, clean or replace as necessary.* 4) Tighten, clean or replace as necessary.* 5) Charge or replace battery. |
| Engine cranks but will not start. | 1) Out of fuel. 2) Defective fuel solenoid (FS). 3) Defective spark plug(s). 4) Valve clearance needs adjustment. | 1) Replenish fuel / Turn on fuel valve. 2) * 3) Clean, re-gap or replace plug(s). 4) Adjust valve clearance. |
| Engine starts hard and runs rough. | 1) Air cleaner plugged or damaged. 2) Defective spark plug(s). 3) Fuel regulator not set. 4) Fuel pressure incorrect. 5) Fuel selector in wrong position. | 1) Check / replace air cleaner. 2) Clean, re-gap or replace plug(s). 3) Set fuel regulator. 4) Confirm fuel pressure to regulator is 10-12” water column (19-22mm mercury) for LP, and 3.5 - 7” water column (9-13mm mercury) for natural gas. 5) Move selector to correct position. |
| Generator is set to OFF, but the engine continues to run. | 1) Control board wired incorrectly. 2) Defective control board. | 1) Repair wiring or replace control board.* 2) Replace control board. |
| No AC output from generator. | 1) Main line circuit breaker is in the OFF (or OPEN) position. 2) Generator internal failure. | 1) Reset circuit breaker to ON (or CLOSED). 2) * |
| Unit consumes large amounts of oil. | 1) Oil tank is over filled with oil. 2) Engine breather defective. 3) Improper type or viscosity of oil. 4) Damaged gasket, seal or hose. | 1) Adjust oil to proper level. 2) * 3) See “Engine Oil Recommendations.” 4) Check for oil leaks. |
| Unit running in AUTO but no power in house. | Check Generator Disconnect circuit breaker. Contact servicing dealer if Generator Disconnect circuit breaker is in the ON position. | |
| High temperature. | Check ventilation around the intake, exhaust and rear of generator. Contact serving dealer if no obstruction is found. | |
| Overload REMOVE LOAD. | Check the LEDs/Screen for alarms. Clear alarm and remove household loads from the generator. Put back in AUTO and restart. | |
| RPM Sense Loss. | Check the LEDs/Screen for alarms. Clear alarm and remove household loads from the generator. Put back in AUTO and restart. If problem returns, contact servicing dealer to investigate possible fuel issue. | |
| Not Activated. | See if screen says unit not activated. Refer to activation section in Owner’s Manual. | |
| Low oil pressure. | Check the LEDs/Screen for alarms. Check oil level. Add oil per Owner’s Manual. Contact servicing dealer if oil level is correct. | |
| Overcrank. | Check the LEDs/Screen for alarms. Check fuel line shutoff valve is in the ON position. Clear alarm. Attempt to start the unit in MANUAL. If it does not start or starts and runs rough, contact servicing dealer. | |
| Low volts REMOVE LOAD. | Check the LEDs/Screen for alarms. Clear alarm and remove household loads from the generator. Set back to AUTO and restart. | |
| Fuse problem. | Check the LEDs/Screen for alarms. Check ATO 7.5 Amp fuse. Replace with same type fuse if bad. Contact servicing dealer if fuse is good. | |
| Overspeed. | Contact servicing dealer. | |
| Under voltage. | Contact servicing dealer. | |
| Underspeed. | Contact servicing dealer. | |
| Stepper overcurrent. | Contact servicing dealer. | |
| Miswire. | Contact servicing dealer. | |
| Unit running in AUTO but no power at L1 and L2. | Check MLCB. If it is ON, contact an IASD. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Alternator, AVR or wiring is damaged.. See the table for the matching fixes.
Documented causes: 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.. See the table for the matching fixes.
Documented causes: Probable causes are: 1) The generator was temporarily overloaded. 2) The output was temporarily shorted. Try to restart the unit.. See the table for the matching fixes.