The 3.3 MLD is a generator-set controller. It is used on generator sets from Cummins/Onan, including the DFEJ and DFEK.
Also fitted to: Cummins/Onan QSK60 Engine with the PowerCommand® 3.3 or 3.3MLD.
| Code | Meaning | Cause |
|---|---|---|
| 121 | SPEED SIGNAL LOST | Indicates that no magnetic pickup pulses were sensed for a Loss of Speed delay. If a magnetic pickup is disabled, this fault is not activated. |
| 1225 | Low Genset Voltage | |
| 1226 | Genset Frequency Error | |
| 1243 | Engine Derated | |
| 1244 | Engine Normal Shutdown | |
| 1245 | Engine Shutdown Fault | |
| 1246 | Unknown Engine Fault | |
| 1248 | Engine Warning | |
| 1311 and 1312 | Customer Input #1 and #2 (Warning or Shutdown) | |
| 1312 | Config Input #2 Fault | |
| 1317 | Low Coolant Level (Warning or Shutdown) | |
| 1318 | Low Fuel (Warning or Shutdown) | |
| 1322 | KW Setpoint OOR Hi | |
| 1323 | KW Setpoint OOR Lo | |
| 1324 | KVAR Setpoint OOR Hi | |
| 1325 | KVAR Setpoint OOR Lo | |
| 1328 | Genset CB Tripped | |
| 135 | OIL PRESS SENSOR OOR HIGH | Indicates the oil pressure sensor output is out of range (OOR), high. |
| 141 | OIL PRESS SENSOR OOR LOW | Indicates the oil pressure sensor output is out of range (OOR), low. |
| 1416 | Fail To Shutdown | |
| 1417 | Power Down Failure | |
| 143 | PRE-LOW OIL PRESSURE | Indicates the engine oil pressure is approaching an unacceptable level. |
| 1433 | Local E-Stop | |
| 1434 | Remote E-Stop | |
| 1435 | Low Coolant Temperature | |
| 1438 | Fail to Crank (Shutdown) | |
| 1439 | Low Day Tank Fuel | |
| 144 | COOLANT SENSOR OOR LOW | Indicates the coolant temperature sensor output is out of range (OOR), low. |
| 1441 | Low Fuel Level | |
| 1444 | KW Overload | |
| 1445 | Short Circuit | |
| 1446 | High AC Voltage | |
| 1447 | Low AC Voltage (Shutdown) | |
| 1448 | Underfrequency | |
| 1449 | Overfrequency | |
| 145 | COOLANT SENSOR OOR HIGH | Indicates the coolant temperature sensor output is out of range (OOR), high. |
| 1451 | Genset/Bus V Mismatch | |
| 1452 | Genset CB Fail To Close | |
| 1453 | Genset CB Fail To Open | |
| 1454 | Genset CB Pos Error | |
| 1455 | Utility CB Pos Error | |
| 1456 | Bus Out Of Sync Range | |
| 1457 | Fail To Synchronize | |
| 1458 | Sync Ph Rot Mismatch | |
| 1459 | Reverse Power | |
| 146 | PRE-HIGH COOLANT TEMP | Indicates that the engine is operating near cooling system capacity. Increase in load or higher ambient temperature may cause High Coolant Temp (code 151) shutdown. |
| 1461 | Loss of Field | |
| 1464 | Load Dump | |
| 1469 | Speed/Hz Mismatch | |
| 1471 | High AC Current (Warning) | |
| 1472 | High AC Current (Shutdown) | |
| 1475 | First Start Backup Fail | |
| 1483 | Common Alarm | |
| 151 | HIGH COOLANT TEMP | Indicates that the engine coolant temperature is above normal and has reached the Shutdown trip point. |
| 153 | INTAKE MANIFOLD TEMP OOR HIGH | Indicates that the intake manifold temperature sensor is out of range (OOR), high. |
| 154 | INTAKE MANIFOLD TEMP OOR LOW | Indicates that the intake manifold temperature sensor is out of range (OOR), low. |
| 1540 | Common Warning | |
| 1541 | Common Shutdown | |
| 155 | INTAKE MANIFOLD TEMP HIGH | Indicates that the intake manifold temperature sensor is above normal and has reached |
| 1573 | Config Input #1 Fault |
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.