Cause : A/D converter error comes when an error occurred in the A/D converter circuit. a problem with the analog-to-digital converter (ADC) within the Fuji FRENIC-VG drive. The ADC is responsible for converting analog signals (like voltage or current) into digital values that the drive can process.

"er8" fault in Fuji FRENIC-VG drive "A/D converter error". This means a problem with the drive's Analog-to-Digital (A/D) converter. The A/D converter is responsible for converting analog signals (such as input from sensors or feedback devices) into digital data that the drive can process.

Troubleshooting Steps:

1. Inspect Wiring and Connections:

   • Check all wiring connections between the A/D converter and the analog input devices (sensors, feedback devices). Ensure that all connections are secure and free from damage.
   • Verify that the wiring is correctly connected according to the drive’s wiring diagram.

2. Test Analog Input Devices:

   • If possible, test the analog input devices (such as sensors) to ensure they are functioning correctly and providing valid signals.
   • Use a multimeter to measure the output of the analog devices and verify that they are within the expected range.

3. Check for Electrical Interference:

   • Ensure that the analog wiring is routed away from sources of electrical noise or interference.
   • Use shielded cables for analog signals and ensure proper grounding to minimize the effects of noise.

4. Verify Configuration Settings:

   • Check the drive’s configuration settings related to analog inputs and ensure they match the requirements of the connected devices.
   • Ensure that any scaling or calibration settings are correctly configured.

5. Inspect the A/D Converter:

   • If accessible, inspect the drive’s A/D converter for any visible signs of damage or malfunction. If the A/D converter is suspected to be faulty, it may need to be replaced.