The 3.3 is a generator-set controller. It is used on generator sets from Caterpillar and Cummins/Onan, including the C3.3 Rental Generator Set, C4.4 Rental Generator Set, C150 D2R and C200 D2R.
Used across brands: Caterpillar, Cummins/Onan
| 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. |
| 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. |
| 143 | PRE-LOW OIL PRESSURE | Indicates the engine oil pressure is approaching an unacceptable level. |
| 144 | COOLANT SENSOR OOR LOW | Indicates the coolant temperature sensor output is out of range (OOR), low. |
| 145 | COOLANT SENSOR OOR HIGH | Indicates the coolant temperature sensor output is out of range (OOR), high. |
| 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. |
| 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. |
| 155 | INTAKE MANIFOLD TEMP HIGH | Indicates that the intake manifold temperature sensor is above normal and has reached |
| Symptom | Cause | Remedy |
|---|---|---|
| Battery fault | Contact your nearest Cummins distributor. | |
| Battery overcharged | Charge alternator fault | |
| Battle Short mode is enabled and an overridden shutdown fault occurs | The Shutdown lamp lights, even though the generator set continues to run. | |
| Dirt accumulations on generator windings. | Proper maintenance of electrical equipment requires periodic visual examination of the generator and periodic visual examination of the windings. Proper maintenance of electrical equipment also requires appropriate electrical checks and appropriate thermal checks. Insulation material should be examined for cracks. The insulation material should be examined for accumulations of dirt and dust. If there is an insulation resistance value that is below normal, a conductive path may be present. This conductive path may be made of one of the following materials: • Carbon • Salt • Metal dust • Dirt that is saturated with moisture These contaminants will develop a conductive path which may produce shorts. Cleaning is advisable if heavy accumulations of dirt can be seen or if heavy accumulations of dust can be seen. If excess dirt is the cause of a restriction in the ventilation, cleaning is also advisable. | |
| Generator windings are damaged due to improper cleaning. | Do not use water to clean the generator. Do not use trichloroethane, perchlorethylene, trichloroethane or any alkaline products to clean the generator. | |
| Generator windings are wet. | Do not operate the generator if the windings are wet. If the generator is operated when the windings are wet, damage can occur due to insulation breakdown. When moisture is present or when moisture is suspected in a generator, the generator must be dried before being energized. If the drying procedure does not restore the insulation resistance to an acceptable value, the winding should be reconditioned. | |
| Low battery fluid level | Check the charger; it may not be shutting off when the charge is complete. Battery terminals getting hot Poor battery connection Clean connections, reconnect and tighten securely. | |
| Mains battery charge fault | Contact your nearest Cummins distributor. | |
| The measured insulation resistance falls below the specified amount. The cleanup procedure does not correct the discrepancy. | The winding needs to be reconditioned or replaced. | |
| The measured insulation resistance falls below the specified amount. The drying procedure does not correct the discrepancy. | The winding needs to be reconditioned or replaced. | |
| Water accumulates in fuel tanks. | Draining the fuel tank regularly and obtaining fuel from reliable sources can help to eliminate water in the fuel. Fuel tanks should contain some provision for draining water and sediment from the bottom of the fuel tanks. Open the drain valve on the bottom of the fuel tank in order to drain the water and the sediment. Close the drain valve. Check the fuel daily. Drain the water and sediment from the fuel tank after operating the engine or drain the water and sediment from the fuel tank after the fuel tank has been filled. Allow five to ten minutes before performing this procedure. Fill the fuel tank after operating the engine in order to drive out moist air. This will help prevent condensation. Do not fill the tank to the top. The fuel expands as the fuel gets warm. The tank may overflow. | |
| Water or sediment from storage tanks is pumped into the engine fuel tank. | Drain the water and the sediment from the fuel storage tank during the following conditions: • Weekly • Oil change • Refill of the tank. This will help prevent water or sediment from being pumped from the storage tank into the engine fuel tank. A four micron(c) absolute filter for the breather vent on the fuel tank is also recommended. |
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.