Internal Fault (Unknown Rating)

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This is a severe internal hardware fault where the drive cannot identify its own rating. This indicates a critical issue within the drive's core electronics or firmware. If left unresolved, the drive cannot operate safely or correctly and may be permanently damaged.

• Critical hardware failure on the main control board preventing the drive from identifying its own rating.
• Corrupted firmware preventing proper initialization and identification of internal components.
• Incompatible or faulty internal component detected during the power-up self-test sequence.
• Severe EEPROM data corruption impacting core drive identification information.
• Unstable internal power supply affecting sensitive logic circuits responsible for component identification.

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1. 1

   1. Perform a complete power cycle of the drive, ensuring sufficient time for internal capacitors to discharge.

2. 2

   2. Attempt a factory parameter reset (e.g., Parameter P1-12 = 1 or 2) if the HMI allows any interaction.

3. 3

   3. Verify input line voltage (e.g., L1-L2, L2-L3, L3-L1) is stable and within the drive's specified operating range.

4. 4

   4. Check for any visible damage on the main control board (e.g., burnt components, swollen capacitors) if safely accessible.

5. 5

   5. Document the fault thoroughly and contact technical support as this indicates a serious internal hardware issue requiring specialized diagnosis.