DC INTF ERROR UPDATE SOLUTION

To address DC-INTF error in PRO model ,First steps you need is  starting by updating  (DSPM) firmware to the latest and the stable version in Pro inverter models. This update often resolves a range of issues, as newer firmware versions come with enhanced functionalities, improved stability, and bug fixes we test this step and solved this error. If updating the firmware does not solve the problem, follow the steps below to continue troubleshooting. 

• TABLE OF CONTENTS

  • 1. Check for Any Loose Connections in MC4 Connectors
    • How to Inspect for Loose Connections:
  • 2. Ensure All MC4 Connectors Are Properly Crimped
    • Crimping Procedure:
  • 3. Verify Proper Polarity of the Strings Connected to the Inverter
    • Steps to Verify Polarity:
  • 4. Test if the Same Fault Occurs by Connecting a Single String to All MPPTs
    • Procedure for MPPT Testing:
  • 5. Check the Open Circuit Voltage (Voc) of Each PV String
    • Steps for Measuring Voc:
  • 6. Use a Multimeter to Check Voltage between PV+ and Earth, PV- and Earth
    • How to Conduct Voltage Tests:
  • 7. If System Is Three-Phase, Check AC Side Voltage (Phase-to-Phase, Phase-to-Neutral, and Neutral-to-Earth)
    • Procedure for AC Voltage Checks in Three-Phase Systems:
  • 8. If System Is Single-Phase, Check AC Side Voltage (Phase-to-Neutral, Phase-to-Earth, and Neutral-to-Earth)
    • Single-Phase Voltage Check Process:
  • 9. Record Complete Data from the Inverter Information Menu (DC1, DC2, DC3, DC4, VA, VB, VC, VGrid, Status, and Total Energy)
    • Data Collection Checklist:
  • 10. Access Advanced Information: Alarm Messages, Version, Running Messages, and Warning Messages
    • Steps for Retrieving Advanced Info:
  • 11. Capture Photos of ACDB, DCDB, Inverter Serial Number, and Complete Installation
    • Photo Checklist:
  • Additional Solutions for Common Solar System Issues