What Troubleshooting Steps Should I Perform If I See F33; What Troubleshooting Steps Should I Perform If I See F34 - Power Electronics VFD Troubleshooting Manual

What troubleshooting steps should I perform if I see F33?

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F33 (MMV Only): Tracking Error
Code Meaning: There is a discrepancy between the drive output speed and the feedback from the encoder.
Further Information/Troubleshooting Tips:
1. Check the physical aspects of the motor encoder. For example, check that the encoder bracket and coupling is
tight, or if the encoder is on a shaft that is driven by gears, check that your gears are meshing correctly. Also
make sure that the encoder is not being pulled or misaligned while the motor is running. Make adjustments to
the encoder coupling and brackets as necessary.
2. Perform an encoder test by setting U48 to 1 and running in test mode at U49. While running at full speed, you
should see a clean readout of 1.00. If you do not see this value you may have an encoder issue.
3. Make sure that your brake is fully releasing and there is no binding from the brake.
4. Is the F33 code only happening when going into high speed? If so, check if your motor is rated for 120 Hz. If it is,
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call PE for information about changing the drive parameters to work properly with a 120Hz motor.
5. Check your control input using E8. Make sure that the UP signal is tied to the Forward input terminal, and the
DOWN command is tied to the Reverse input. If this is backwards, you will have to change the Forward/Reverse
wires, and also reverse one pair of encoder wires (e.g. swap either A+/A- or B+/B-). Lastly you will also have to
swap two T-leads to your motor to reverse the motor direction.
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Call PE for further assistance if needed.

What troubleshooting steps should I perform if I see F34?

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F34 (MMV Only): Encoder tracking error during Zip-Up® function
Code Meaning: There is a discrepancy between the drive output speed and the feedback from the encoder while
running in Zip mode.
Further Information/Troubleshooting Tips:
1. Reduce the Zip speed setting at C124 (Zip-Up® speed) and C129 (Zip-Down® speed).
2. Perform troubleshooting steps for the related code F33.
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Call PE for further assistance.
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