The Evolution 2 HSB is a generator-set controller. It is used on generator sets from Generac, including the 20 kW 3-Phase.
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| BATTERY PROBLEM | Yellow LED illuminated in any state — LED yellow | Check the screen for additional information | Contact an IASD. |
| CHARGER WARNING | Yellow LED illuminated in any state — LED yellow | Check the screen for additional information | Contact an IASD. |
| FUSE PROBLEM | Unit will not start in AUTO with utility loss — 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. |
| 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. |
| INSPECT BATTERY | Yellow LED illuminated in any state — LED yellow | Check the screen for additional information | Inspect battery. Press ENTER to clear. |
| LOW BATTERY | Yellow LED illuminated in any state — LED yellow | 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 OIL PRESSURE | Unit will not start in AUTO with utility loss — 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 VOLTS REMOVE LOAD | Unit will not start in AUTO with utility loss — LED red | Check the LEDs / screen for alarms | Clear alarm and remove household loads from the generator. Put in AUTO and restart. |
| MISWIRE | Unit will not start in AUTO with utility loss — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| NOT ACTIVATED | Unit will not start in AUTO with utility loss — LED none | Check if screen says unit not activated | Refer to "Activation" in installation manual. |
| OVERCRANK | Unit will not start in AUTO with utility loss — 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. |
| 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. |
| OVERSPEED | Unit will not start in AUTO with utility loss — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| OVERVOLTAGE | Unit will not start in AUTO with utility loss — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| 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 utility loss — 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. |
| SERVICE A | Yellow LED illuminated in any state — LED yellow | Check the screen for additional information | Perform SERVICE A maintenance. Press ENTER to clear. |
| SERVICE B | Yellow LED illuminated in any state — LED yellow | Check the screen for additional information | Perform SERVICE B maintenance. Press ENTER to clear. |
| STEPPER OVERCURRENT | Unit will not start in AUTO with utility loss — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| UNDERSPEED | Unit will not start in AUTO with utility loss — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| UNDERVOLTAGE | Unit will not start in AUTO with utility loss — LED red | Check the LEDs / screen for alarms | Contact an IASD. |
| Symptom | Cause | Remedy |
|---|---|---|
| Engine cranks but will not start | No fuel | Replenish fuel / turn on fuel valve. |
| Engine starts hard and runs rough | Air cleaner plugged or damaged | Check and clean air cleaner. |
| Engine will not crank | Blown fuse | Correct short circuit condition by replacing 7.5 amp fuse in generator control panel. Contact an Independent Authorized Service Dealer (IASD) if fuse continues to blow. |
| Generator is set to OFF, but the engine continues to run | Controller wired incorrectly | Contact an IASD for assistance. |
| No AC output from generator | Main line circuit breaker (MLCB) (generator disconnect) is OFF (OPEN) | Reset generator disconnect to ON (CLOSED). |
| No transfer to standby after utility source failure | MLCB (generator disconnect) is OFF (OPEN) | Reset generator disconnect to ON (CLOSED). |
| Unit consumes large amounts of oil | Excessive engine oil | Adjust oil to proper level. |
| Unit running in AUTO but no power in house — LED flashing green | Check MLCB | Check MLCB. If it is ON, contact an IASD. |
| Unit will not start in AUTO with utility loss — LED green | Check screen for start delay countdown | If the startup delay is greater than expected, contact an IASD to adjust from 2 to 1500 seconds. |
Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.