Magnum MMG35D troubleshooting: 21 fault codes and 6 symptom-cause-remedy entries from the manufacturer's own service documentation.
Magnum MMG35D — full specs, parts & maintenance.
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| 13 | Igen unbl — The generator current is unbalanced. | ||
| 14 | Low BackupBatt — RTC backup battery is flat (low). | ||
| 15 | Oil Press Sd — Oil pressure is smaller than Oil Press Sd setpoint. | ||
| 16 | Oil Press Wrn — Oil pressure is smaller than Oil Press Wrn setpoint. | ||
| 17 | Overload — The load is greater than the value given by Overload setpoint. | ||
| 18 | Overspeed — The protection comes active if the speed is greater than Overspeed setpoint. | ||
| 19 | ParamFail — Wrong checksum of parameters. Happens typically after downloading new firmware or changing of the parameter. The controller stays in INIT mode. | Wrong checksum of parameters | Check all parameters, write at least one new parameter. |
| 20 | PickupFault — Failure of the magnetic pick-up sensor for speed measurement. | Failure of the magnetic pick-up sensor for speed measurement | |
| 21 | Sd IOM fail — IOM/IGS-PTM module. | ||
| 22 | SprinkIActive — The protection is active if the output Sprinkler is closed. | ||
| 23 | Start failed — Unit did not start. | ||
| 24 | Stop fail — Unit did not stop. | ||
| 25 | Ubat — Battery voltage is out of limits given by Batt Undervolt setpoints. | ||
| 26 | Underspeed — During starting of the engine, when the RPM reaches the value of Starting RPM setpoint, the starter is switched off and the speed of the engine can drop under Start RPM again. Then the underspeed protection becomes active. Protection evaluation starts 5 seconds after start up. | ||
| 27 | Vgen<, > — The generator voltage is out of limits given by Gen <V and Gen <V setpoints. | ||
| 28 | Vgen unbal — The generator voltage is unbalanced more than the value of Volt unbal setpoint. | ||
| 29 | Wrn ECU Alarm — ECU alarm list is not empty. | ||
| 30 | Wrn RA15 fail — Warning alarm in case of lost connection to IGL=RA15 module. | ||
| 31 | WrnMaintenance — The period for servicing is set by the WrnMaintenance setpoint. The protection comes active if the running hours of the engine reach this value. | ||
| FC | ECU alarm FailureCode | ||
| null | The door covering the customer connection lugs/cam lock receptacles is opened. |
| Symptom | Cause | Remedy |
|---|---|---|
| Low fuel level shut down | Fuel level low; Leaks in the fuel tank; Fuel level sender and connecting wiring damaged | Check the fuel level on the Liquid Crystal Display (LCD) window and confirm that the generator is sitting level to ensure an accurate reading; Check for leaks in the fuel tank; Check the fuel level sender and the connecting wiring for damage and check for continuity between the sender and the engine controller |
| Low oil pressure shut down | Engine oil level low; Oil leaks; Loss of oil pressure; Oil pressure sender faulty | Check the level of the engine oil with the dipstick and add oil if required; Visually inspect the engine for oil leaks; Restart the unit and verify the loss of oil pressure, shut the engine down immediately if the oil pressure value does not read 5 psi (34 kPa) within five seconds; Check the oil pressure sender and refer to the troubleshooting section of the engine operation and maintenance manual |
| Low coolant level shut down | Coolant level low; Coolant leaks; Coolant mixed with engine oil | Allow the engine to cool; Check the coolant level in the radiator and add coolant until it is 3/4" below the filler neck; Inspect coolant hoses, engine block and water pump for visible leaks; Check engine oil to verify no coolant has mixed with it and consult the engine operation and maintenance manual |
| High coolant temperature shut down | Coolant level low; Radiator shroud and ducting blockage; Coolant leaks; Serpentine drive belt tension incorrect; Engine overheating | Check the coolant level in the overflow jug; Restart the engine and read the coolant temperature to verify High Coolant Temperature Shut down, stop the engine immediately if the coolant temperature is 230°F (110°C) or more; Allow the engine to cool, add coolant to the overflow jug if it is low and check the level of coolant in the radiator, add coolant until it is 3/4" below the filler neck; Check the radiator shroud and ducting for blockage and remove any foreign matter; Inspect coolant hoses, engine block and water pump for visible leaks; Check the tension of the serpentine drive belt for the water pump; Remove the load on the generator and restart the engine, check the coolant temperature and shut the engine down immediately if it starts to overheat, consult the engine operation and maintenance manual |
| Overcrank shut down | Fuel level low; Fuel pump not operating properly; Air filter blocked; Engine will not start | Check the fuel level in the tank; Check for proper operation of the fuel pump; Check air filter for blockage; Consult the engine operation and maintenance manual for additional information on troubleshooting starting problems |
| Overspeed or underspeed shut down | Disconnect all loads and restart the generator; Read the frequency (Hz) on the LCD display |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Wrong checksum of parameters. See the table for the matching fixes.
Documented causes: Failure of the magnetic pick-up sensor for speed measurement. See the table for the matching fixes.
Documented causes: Fuel level low; Leaks in the fuel tank; Fuel level sender and connecting wiring damaged. See the table for the matching fixes.