SMA Sunny Boy Error Code 6002

SMA PLC & VFD Critical System

Model: Sunny Boy | Code: 6002

Applicable Systems
Sunny Boy

Symptoms

Self-diagnosis fault. The inverter's internal self-diagnosis routine has detected a fault. The invertercannot operate.

Possible Causes

  • Power stage IGBT module failure detected by self-test
  • Control board DSP fault detected by watchdog
  • Internal power supply rail out of specification
  • Firmware corruption detected by checksum

Troubleshooting Steps

  1. Step 1: Check the equipment status and fault indicators to confirm the active fault code
    Fault indicator or HMI displays code 6002 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 6002 mean on the SMA Sunny Boy?

    Fault 6002 on the SMA Sunny Boy indicates: Self-diagnosis fault. The inverter's internal self-diagnosis routine has detected a fault. The inverter cannot operate. Refer to the equipment manual and manufacturer support for specific troubleshooting steps.

  • Q: Can I continue operating the equipment with fault 6002 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 SMA Fault Codes

Source: SMA Sunny Boy Inverter Installation and Operation Manual, SMA Official Documentation

Category: PLC & VFD