Cummins Onan Generator Control Assembly 0300-6396

Product Parameters

• Model Number: 0300-6396
• Manufacturer: Cummins Onan
• Compatible Series: Quiet Diesel (QD) Series, Marine, and RV Generators
• Control Type: Integrated Digital Control Module
• Input Voltage: 12 Vdc (Standard Chassis Power)
• Connectivity: Multi-pin harness connector for engine and alternator sensors
• Functions: Start/Stop control, safety shutdowns, and diagnostic monitoring
• Enclosure: Sealed potting for moisture and vibration resistance

Product Description The 0300-6396 is a specialized control assembly designed for Cummins Onan power generation units, commonly used in high-end RV and marine applications. This module acts as the “brain” of the generator, managing everything from initial pre-heat and cranking to steady-state operation. It features integrated logic to monitor critical engine parameters such as oil pressure, coolant temperature, and output frequency. If any parameter falls outside of safe limits, the assembly initiates an automatic safety shutdown to prevent catastrophic engine or alternator damage.

Product Applications This control assembly is primarily installed in Cummins Onan Quiet Diesel generators ranging from 5.5kW to 12.5kW. It is an essential component for mobile power solutions found in luxury motorhomes, commercial specialty vehicles, and marine vessels. The board is designed to interface directly with remote start/stop panels and digital monitoring systems, ensuring the user has real-time feedback on generator health and fault codes.

Product Specifications

• Weight: 0.58 kg
• Dimensions: 14.2 cm x 11.5 cm x 4.8 cm
• Country of Origin: United States (USA)
• Operating Temperature: -40°C to +70°C
• 

Operational Precautions

• Harness Inspection: Before installing a new control board, inspect the main wiring harness for shorts or pinched wires, as an external electrical fault is the most common cause of control assembly failure.
• Battery Disconnect: Always disconnect the negative battery cable before replacing the control module to prevent accidental short circuits during the connection of the multi-pin plug.
• Moisture Protection: Ensure the module is mounted in its designated location with all protective covers in place; while sealed, prolonged direct exposure to salt spray or high-pressure water can eventually degrade connector pins.
• Fault Diagnosis: Use the blinking LED fault code system on the start/stop switch to identify why the board initiated a shutdown before attempting to restart the unit multiple times.

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