| Fault Code No. 4 | The amber status light will blink and cranking will discontinue in 20 to 60 seconds. | See Troubleshooting (Page 9-1) if the genset does not start after two or three tries. |
| NO. 22 | GOVERNOR OVERLOAD: Maximum allowable time at full-duty cycle was exceeded | 1. Reduce the number of appliances running at the same time, especially those with high motor starting loads such as air conditioners. 2. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 3. Reconnect any loose spark plug or ignition coil lead (Page 26). 4. Replace the in-line fuel filter. |
| NO. 23 | FAULTY OIL PRESSURE SENDER: Controller sensed shorted or grounded sender | Look for a loose oil pressure sender lead and reconnect it if necessary. The sender is directly behind the oil filter (Page 17). |
| NO. 24 | FAULTY ENGINE TEMP SENDER: Controller sensed open or grounded sender | Look for a loose temperature sender lead and reconnect it if necessary. The sender is directly behind the last spark plug (Page 27). |
| NO. 27 | LOSS OF AC VOLTAGE SENSE: Controller unable to sense output voltage | See an authorized Onan dealer. |
| NO. 29 | HIGH BATTERY VOLTAGE: Battery system at more than 19.2 volts | 1. Check battery bank connections and reconnect if necessary to supply 12 volts. 2. Select a lower boost charge rate on the boat battery charger. |
| NO. 32 | STARTING FAULT: Cranking not detected | See an authorized Onan dealer. |
| NO. 35 | CONTROL CARD FAILURE—EE: Microprocessor EEPROM error during self-test | See an authorized Onan dealer. |
| NO. 36 | UNKNOWN SHUTDOWN—SEE MANUAL: Engine stopped without command by controller | 1. Open any closed fuel supply valves. 2. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 3. Check for mechanical damage and service as necessary. 4. Remove any blockage in the combustion air inlet (left end of genset). 5. Reconnect any loose spark plug or ignition coil lead (Page 26). 6. Replace the in-line fuel filter. |
| NO. 37 | INVALID GENSET CONFIGURATION: Controller cannot determine genset operating parameters | See an authorized Onan dealer. |
| NO. 38 | HIGH FIELD VOLTAGE: Low power factor loads | 1. Reduce the number of appliances running at the same time, especially those with high motor starting loads such as air conditioners. 2. Have air conditioners and other appliances checked for proper operation. (A locked compressor rotor can cause very low power factor.) 3. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 4. Reconnect any loose spark plug or ignition coil lead (Page 26). 5. Replace the in-line fuel filter. |
| NO. 39 | LOW BATTERY VOLTAGE: Marginal battery, connections, or charging system, or parasitic loads | 1. Clean and tighten the positive (+) and negative (−) battery cable connections at the battery and genset (Page 18). 2. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations. |
| NO. 41 | GROUNDED FIELD: Controller unable to sense field or output voltage | See an authorized Onan dealer. |
| NO. 42 | CONTROL CARD FAILURE−ROM: Microprocessor ROM error during self-test | See an authorized Onan dealer. |
| NO. 43 | CONTROL CARD FAILURE−RAM: Microprocessor RAM error during self-test | See an authorized Onan dealer. |
| NO. 45 | SPEED SENSE LOST: Controller unable to sense field voltage | See an authorized Onan dealer. |
| NO. 48 | CONTROL CARD FIELD SENSE LOST: Controller unable to sense field voltage | See an authorized Onan dealer. |
| NO. 57 | OVERPRIME: Prime mode exceeded 5 minutes | Check for and remove any object that may be holding any control switch in the prime position. |
| NO. 58 | HIGH EXHAUST TEMPERATURE: Exhaust temperature exceeded design limits | 1. Check for and reconnect or replace any disconnected or leaking raw water hoses (Page 19). 2. Check for and replace a worn raw water impeller (Page 23). |
| NO. 61 | EMERGENCY SHUTDOWN: Genset was shut down by a fire suppression system or other external control connected to genset | Make all necessary repairs to the genset and connected equipment and reset the external control which shut down the genset. |