Yaskawa A1000 oPE01 Error Drive Capacity Setting Mismatch

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Getting the oPE01 error on your Yaskawa A1000 VFD? This guide explains how to correctly set parameter o2-04 to match your drive's physical capacity and clear the fault.

Yaskawa A1000 oPE01 Error Drive Capacity Setting Mismatch

 

If you are commissioning a Yaskawa A1000 drive or have recently replaced the control board, you might be stopped in your tracks by the oPE01 error code. On the digital operator, this displays as "Drive Capacity Mismatch."

The good news is that oPE01 is not a hardware failure. It is a "Parameter Setting Error." Essentially, the "brain" of the drive (the control board) doesn't know which "body" (the power section) it is attached to. Here is how to fix it in a few simple steps.

What Causes the oPE01 Error?

Every Yaskawa drive has a specific capacity rating (Voltage and Amperage). This identity is stored in Parameter o2-04 (Drive Model Selection). The oPE01 fault triggers when the value programmed into o2-04 does not match the actual physical hardware of the drive.

This most commonly happens during:

  • Control Board Replacement: A new board often comes with a default setting that doesn't match your specific frame size.
  • Initialization: Occasionally, a full factory reset can leave this parameter in an undefined state.
  • Parameter Copying: If you upload parameters from a 5HP drive and download them into a 20HP drive, oPE01 will appear immediately.

The Solution: Correcting Parameter o2-04

To clear the error, you must align the software with the hardware. Follow this step-by-step guide:

1. Identify Your Drive Model

Look at the nameplate on the side of your Yaskawa A1000 drive. Note the Model Number (e.g., CIMR-AA2A0004 or CIMR-AA4A0011). You will need this to verify the correct capacity code in the Yaskawa Technical Manual.

2. Access Parameter o2-04

Note: You may need to set A1-01 (Access Level) to "2" (Advanced Level) to see the "o" (Operator) group parameters.

  • Navigate to the Programming Menu.
  • Locate parameter o2-04.
  • The drive will likely allow you to see the current hex code assigned to the capacity.

3. Enter the Correct Code

Each model has a unique 4-digit hexadecimal code. For example:

Drive Model (200V Class) o2-04 Value
CIMR-AA2A000404
CIMR-AA2A000605
CIMR-AA2A001007

*Refer to the "Drive Model Selection" table in your specific A1000 Technical Manual to find the exact code for your model number.

4. Cycle Power

Once you change the value in o2-04, the drive usually requires a power cycle to "marry" the control board to the power section. Turn the power off, wait for the display to go blank, and turn it back on.

What if the Parameter Won't Change?

In some firmware versions, the drive is very protective of o2-04. If you cannot modify it, ensure that:

  • The drive is Stopped (the "Run" light is not on).
  • You are in the Advanced Programming access level (A1-01 = 2).
  • The parameter lock (A1-04) is not active.

Summary

The oPE01 error is simply a request for identity. By ensuring that parameter o2-04 matches the physical nameplate of your Yaskawa A1000, the error will clear, and you can proceed with your motor tuning and commissioning.

 

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