CNV side Hall CT zero-phase current abnormal

Hitachi Elevator High Elevator

Model: MCA | Code: 4B

Applicable Systems
WJ200

Symptoms

Converter side Hall CT zero-phase current abnormal

Possible Causes

  • Converter side Hall CT sensor fault
  • CT zero drift
  • CT wiring issue

Troubleshooting Steps

  1. Step 1: Check converter side Hall CT
    Verify the fault is resolved after completing this step.
  2. Step 2: verify wiring
    Verify the fault is resolved after completing this step.
  3. Step 3: calibrate zero point
    Verify the fault is resolved after completing this step.
  4. Step 4: replace if faulty
    Verify the fault is resolved after completing this step.

How to Reset

Power cycle after calibration

Related Hitachi Fault Codes

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Category: Elevator