The Mitsubishi FR-D700 VFD (Variable Frequency Drive) utilizes fault codes to indicate various operational issues. Here's how to find and troubleshoot these fault codes on your D700 drive:

Locating Fault Codes:

There are two primary ways to access fault codes on your Mitsubishi D700 VFD:

1. Inverter Display: The D700 has a built-in display that shows the active fault code as a letter "E" followed by a number (e.g., E.OC1, E.CL2).
2. Operation Panel: If your D700 is connected to an external operation panel, the fault code might be displayed there as well.

Mitsubishi D700 Resources:

Mitsubishi provides resources to help you understand and troubleshoot fault codes for your specific D700 model. Here are some helpful starting points:

• FR-D700 Instruction Manual: This manual provides detailed information on fault codes, including their descriptions, causes, and troubleshooting steps
• Mitsubishi FA-Q&A Website: This Mitsubishi website offers a searchable database of frequently asked questions related to their automation products, including inverters.

Common Mitsubishi D700 Fault Codes:

Here are some commonly encountered fault codes on Mitsubishi D700 VFDs:

• E.OC1: Overcurrent: This indicates an overload condition on the motor connected to the drive.
• E.CL2: Control circuit fault: This signifies a malfunction within the inverter's control circuits.
• E.UV: Undervoltage: This indicates a voltage at the inverter's input that is below the acceptable limits.
• E.OH: Overheat: This indicates that the inverter's internal heat sink has reached an excessively high temperature.
• E.F: Ground fault: This signifies a current leakage to ground.
• E.AIE: Analog input error: This indicates an issue with the signal coming from an external analog input device connected to the inverter.

Troubleshooting Tips:

Once you identify the fault code using the methods mentioned above, consult the user manual or Mitsubishi FA-Q&A website for specific troubleshooting steps for your code. Here are some general tips:

• Safety First: Always ensure the power is off and the drive is safely isolated before performing any troubleshooting procedures.
• Check for Obvious Issues: Start by inspecting for loose wiring, damaged components, or any external factors that might be causing the fault.
• Reset the Drive (Optional): In some cases, a simple reset of the drive might clear the fault if it was a temporary glitch. However, if the fault persists, further troubleshooting is necessary.
• Consult a Qualified Technician: If you're unsure about troubleshooting the fault yourself, consider contacting a qualified technician familiar with Mitsubishi D700 VFDs for further assistance.

By utilizing the Mitsubishi resources, following these tips, and referring to the specific fault code in the user manual, you should be able to identify and troubleshoot most common issues with your Mitsubishi D700 VFD. Remember, consulting the user manual for your exact model is crucial for accurate troubleshooting steps and detailed descriptions of each fault code.