Huawei SUN2000 Error Code 2002

Huawei PLC & VFD Critical DC Input

Model: SUN2000 | Code: 2002

Applicable Systems
SUN2000

Symptoms

DC input overvoltage on boost circuit. The boost circuit DC bus voltage exceeds the maximum allowed value.

Possible Causes

  • Boost converter feedback loop fault causing uncontrolled boost
  • PV array voltage spike under partial shading conditions
  • DC bus voltage sensor calibration drift
  • Boost converter PWM controller fault

Troubleshooting Steps

  1. Step 1: Check the equipment status and fault indicators to confirm the active fault code
    Fault indicator or HMI displays code 2002 as active
  2. Step 2: Verify all electrical connections, wiring harnesses, and connector seating
    All connections secure, no corrosion, loose pins, or damaged wires
  3. Step 3: Check the system diagnostic buffer or event log for detailed fault information
    Diagnostic buffer shows the specific fault cause and timestamp
  4. Step 4: Verify power supply stability and environmental conditions
    Power supply stable, environment within specifications
  5. Step 5: Restart the equipment or power-cycle the control system
    Equipment restarts and enters normal operating state
  6. Step 6: Contact manufacturer support if the fault persists after all checks
    Support provides specific troubleshooting guidance

How to Reset

To reset: 1) Identify and fix the root cause described in the fault symptoms. 2) Press RESET on the HMI or controller, or power-cycle the equipment. 3) If the fault recurs, contact manufacturer service. Caution: Document the fault code and context before resetting.

Frequently Asked Questions

  • Q: What does fault code 2002 mean on the Huawei SUN2000?

    Fault 2002 on the Huawei SUN2000 indicates: DC input overvoltage on boost circuit. The boost circuit DC bus voltage exceeds the maximum allowed value. Refer to the equipment manual and manufacturer support for specific troubleshooting steps.

  • Q: Can I continue operating the equipment with fault 2002 active?

    No. The equipment has detected a fault condition and has taken protective action (typically stopping or derating). Continuing to operate without fixing the root cause may cause further damage. Always investigate and fix the fault before resuming operation.

Related Huawei Fault Codes

Source: Huawei SUN2000 Series Inverter User Manual, Huawei Official Support (support.huawei.com)

Category: PLC & VFD