Resetting Delta Inverters to Factory Settings

   The detailed operation guide for resetting Delta inverters to factory settings, taking into account the characteristics of different models and safety regulations, is as follows:

 I. Preparation before Operation

1. **Confirm the Model**

   Delta offers a wide range of inverter series (such as VFD - B, VFD - M, VFD - E, etc.). The steps to reset to factory settings vary by model. For example:

   - **VFD - B Series**: Requires a combination of key operations.

   - **VFD - E Series**: Achieved through parameter settings (e.g., 00 - 02 = 9 or 10).

   - **VFD - M Series**: You need to enter the programming mode and set specific parameters.

2. **Back up Parameters**

   Use the **Delta DriveWizard Plus** software provided by Delta or the operation panel to export the current parameters to avoid the hassle of re - configuring after the reset.

3. **Safe Power - off**

   Disconnect the power supply of the inverter, wait for at least 5 minutes (to ensure that the internal capacitors are fully discharged), and wear insulating gloves during the operation.

 II. Core Steps to Reset Different Series to Factory Settings

1. VFD - B Series (General - purpose)

- **Hardware Key Operation**:

  1. After powering off, press and hold the **MODE** and **ENTER** keys on the panel simultaneously.

  2. Power on the inverter. Release the keys after the screen displays **FAC**.

  3. Press the **ENTER** key to enter the reset mode. The screen will show **rst**.

  4. Press the **ENTER** key again to confirm. The screen showing **End** indicates the completion of the operation.

  5. Power off and restart the inverter.

- **Parameter Setting Operation**:

  1. Enter the parameter setting interface (by pressing the **MODE** key).

  2. Select **00 - 02 (Parameter Reset Setting)** and set it to **09** (for 50Hz) or **10** (for 60Hz).

  3. Press the **DATA** key to save and exit.

2. VFD - E Series (Economical)

  1. Enter the parameter setting interface (by pressing the **MENU** key).

  2. Find **00 - 02 (Parameter Reset Setting)** and set it to **09** or **10**.

  3. Press the **ENTER** key to confirm. The screen will show **PASS**.

  4. Power off and restart the inverter.

3. VFD - M Series (For Fans and Pumps)

  1. After powering off, press and hold the **SET** key on the panel.

  2. Power on the inverter. Release the key after the screen displays **P000**.

  3. Enter the password **0000** (default value).

  4. Select **P78 (Parameter Lock/Reset Setting)** and set it to **09** or **10**.

  5. Press the **ENTER** key to confirm. The screen will show **END**.

4. VFD - C2000 Series (High - performance)

  1. Enter the parameter setting interface (by pressing the **MENU** key).

  2. Find **H03.03 (Parameter Reset)** and set it to **1**.

  3. Press the **ENTER** key to confirm. The screen will show **RESET**.

  4. Power off and restart the inverter.

 III. Notes and Fault Handling

1. **Parameter Conflict**

   After resetting to factory settings, some parameters (such as the number of motor poles and voltage) may not match the actual equipment. You need to recalibrate them.

2. **Safety Regulations**

   - Avoid touching the internal circuits during operation to prevent electric shock.

   - Check if the grounding is good after the reset to avoid equipment malfunctions.

3. **Special Scenarios**

   - **Password Lock**: If the parameters are password - protected, you need to clear the password first through **00 - 07 (Parameter Protection Decoding Input)**.

   - **Communication Fault**: After the reset, you need to re - set the communication parameters (such as baud rate and address).

4. **Abnormal Handling**

   - **Reset Failure**: Check if the parameter settings are correct, or try the hardware key operation (e.g., for the VFD - B series).

   - **Incorrect Operation**: If the inverter fails to start after the reset, it may be because the parameters were not saved correctly. You need to re - set them and power off and restart the inverter.

*Example Operation Video**:

For intuitive guidance, you can visit the Delta Industrial Automation Academy.

By following the above steps, you can safely and efficiently reset the Delta inverter to its factory state. Make sure to follow the specifications corresponding to the model and refer to the official documentation first to ensure accuracy.