Hitachi error code 03 indicating an over-current condition suggests that the device is drawing more current than it is designed to handle. This can be caused by various factors:

Potential Causes of Over-Current:

• Overloaded Circuit: The device might be connected to a circuit that is already heavily loaded.
• Internal Component Failure: A faulty component within the device, such as a motor or power supply, could be drawing excessive current.
• External Short Circuit: A short circuit outside the device, in the wiring or connected equipment, can cause a surge in current.
• Incorrect Settings: Improperly configured settings on the device can lead to excessive current draw.

Troubleshooting Steps:

1. Check Circuit Load: Ensure that the circuit the device is connected to is not overloaded. If necessary, redistribute the load or use a dedicated circuit.
2. Inspect Device: Look for any visible signs of damage, overheating, or loose connections.
3. Measure Current: Use a clamp meter to measure the current drawn by the device. Compare it to the rated current.
4. Check for Short Circuits: Inspect the wiring and connected equipment for any signs of short circuits.
5. Verify Settings: Ensure that the device's settings are configured correctly. Refer to the user manual for specific instructions.