{"id":758,"date":"2025-08-22T10:34:04","date_gmt":"2025-08-22T10:34:04","guid":{"rendered":"http:\/\/localhost\/wordpress\/?p=758"},"modified":"2026-03-18T11:37:36","modified_gmt":"2026-03-18T11:37:36","slug":"siemens-1fk7063-5af71-1eg0-servo-motor-for-precision-industrial-automation","status":"publish","type":"post","link":"https:\/\/anadiautomation.com\/blog\/siemens-1fk7063-5af71-1eg0-servo-motor-for-precision-industrial-automation\/","title":{"rendered":"VFD Fault Codes Explained \u2013 Common Errors Across Major Brands"},"content":{"rendered":"\n

A Variable Frequency Drive (VFD)<\/strong> is a smart controller for electric motors. Like any electronic system, it can run into problems. To help users quickly understand what went wrong, VFDs display fault codes<\/strong>. These are short messages or numbers that act like \u201cerror signals,\u201d pointing to the specific issue.<\/p>\n\n\n\n

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What Are VFD Fault Codes?<\/strong><\/h2>\n\n\n\n

When a VFD detects something abnormal \u2014 such as too much current, overheating, or a wiring problem \u2014 it shuts down the motor to protect both the drive and the equipment. Instead of leaving you guessing, it shows a fault code<\/strong> on its display.<\/p>\n\n\n\n

Each manufacturer (like Allen Bradley, Siemens, Yaskawa, Schneider, etc.) has its own list of codes, but most VFDs cover similar categories of faults.<\/p>\n\n\n\n

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Since fault codes can vary between brands (Allen Bradley, Siemens, Yaskawa, Schneider, ABB, etc.), I\u2019ll give you a general list of the most common VFD fault codes with their meanings<\/strong>. These cover 90% of what users see across different models:<\/p>\n\n\n\n

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Common VFD Fault Codes and Their Meanings<\/strong><\/h2>\n\n\n\n

OV (Overvoltage Fault)<\/strong><\/strong><\/p>\n\n\n\n

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  1. The DC bus voltage is too high.<\/li>\n\n\n\n
  2. Causes: Sudden deceleration, power surges, braking issues.<\/li>\n<\/ol>\n\n\n\n

    UV (Undervoltage Fault)<\/strong><\/strong><\/p>\n\n\n\n

      \n
    1. Input power supply is too low.<\/li>\n\n\n\n
    2. Causes: Weak grid supply, loose connections, long cable runs.<\/li>\n<\/ol>\n\n\n\n

      OC (Overcurrent Fault)<\/strong><\/strong><\/p>\n\n\n\n

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      1. Motor current exceeded safe limits.<\/li>\n\n\n\n
      2. Causes: Motor overload, jammed load, short circuit.<\/li>\n<\/ol>\n\n\n\n

        OH (Overheat \/ Overtemperature Fault)<\/strong><\/strong><\/p>\n\n\n\n

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        1. Drive\u2019s internal temperature is too high.<\/li>\n\n\n\n
        2. Causes: Blocked cooling fan, high ambient temperature, overload.<\/li>\n<\/ol>\n\n\n\n

          GF (Ground Fault \/ Earth Fault)<\/strong><\/strong><\/p>\n\n\n\n

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          1. Current is leaking to ground.<\/li>\n\n\n\n
          2. Causes: Motor insulation damage, cable fault.<\/li>\n<\/ol>\n\n\n\n

            CF (Communication Fault)<\/strong><\/strong><\/p>\n\n\n\n

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            1. VFD lost connection with PLC, HMI, or network.<\/li>\n\n\n\n
            2. Causes: Broken communication cable, wrong settings, network drop.<\/li>\n<\/ol>\n\n\n\n

              OL (Overload Fault)<\/strong><\/strong><\/p>\n\n\n\n

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              1. Motor or VFD is running above rated load for too long.<\/li>\n\n\n\n
              2. Causes: Mechanical overload, improper motor sizing.<\/li>\n<\/ol>\n\n\n\n

                SC (Short Circuit Fault)<\/strong><\/strong><\/p>\n\n\n\n

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                1. Short circuit detected in motor or cabling.<\/li>\n\n\n\n
                2. Needs immediate inspection.<\/li>\n<\/ol>\n\n\n\n

                  STO (Safe Torque Off Fault)<\/strong><\/strong><\/p>\n\n\n\n

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                  1. Safety circuit has triggered and disabled motor torque.<\/li>\n<\/ol>\n\n\n\n

                    PH (Phase Loss \/ Phase Imbalance Fault)<\/strong><\/strong><\/p>\n\n\n\n

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                    1. Missing or unbalanced input power phase.<\/li>\n\n\n\n
                    2. Causes: Loose wire, power supply failure.<\/li>\n<\/ol>\n\n\n\n
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                      \u2705 Important Note:<\/strong>
                      <\/strong> Each brand has its own exact fault code numbers and names. For example:<\/p>\n\n\n\n

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                      1. Siemens<\/strong> may display \u201cF0003\u201d for overcurrent.<\/li>\n\n\n\n
                      2. Allen Bradley PowerFlex<\/strong> may show \u201cF5\u201d for overvoltage.<\/li>\n\n\n\n
                      3. Yaskawa<\/strong> may show \u201coC\u201d for overcurrent.<\/li>\n<\/ol>\n\n\n\n

                        So while the meaning is the same, the code label differs.<\/p>\n\n\n\n

                        Here\u2019s a detailed, brand-wise compilation of common VFD fault codes<\/strong>, from major manufacturers\u2014perfect for technical readers yet written in clear, user-friendly language:<\/p>\n\n\n\n

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                        1. Allen-Bradley PowerFlex (525 Series)<\/strong><\/h3>\n\n\n\n

                        Most commonly seen in industrial automation, here are selected fault codes with descriptions:F013 \u2013 Ground Fault<\/strong><\/strong><\/p>\n\n\n\n