V200 Pro Circuit Tester – Understanding Mode II and Cable Fault Detection
Some V200 Pro users have questions about the display behavior and cable fault function when switching to Mode II. In this post, we’ll explain what happens, why it’s normal, and how to ensure your V200 Pro works correctly during wire tracing or breaker finding.

🔹 Why the Screen Turns Off in Mode II
When you switch your V200 Pro Circuit Tester to Mode II, you may notice that the main screen turns off.
Don’t worry — this is completely normal.
In Mode II, the device is used for Wire Tracing or Breaker Finding, and during these operations, no numerical data or diagnostic values are displayed. Since the screen isn’t needed, the main unit automatically powers off the display to save energy and ensure stable signal detection.
🔹 How to Use the Wire Tracing Function Correctly
• Attach the red and black clips to both ends of the wire you want to test.
• Switch to Mode II to begin tracing.
• Use the receiver probe to locate breaks or faults along the wire.
• Following these steps ensures accurate detection and reduces interference during testing.
🔹 What to Do If the Breaker Finder Doesn’t Work
If your Breaker Finder or Cable Fault function still doesn’t work as expected, you can you can refer to this detailed video guide — the last part of the video:
If you’ve followed the steps and the function still fails to respond, the issue may be hardware-related. In that case, please record a short video showing how the device behaves during testing and send it to our support team. This will help our engineers analyze the issue accurately and offer the right solution quickly.
💡 Conclusion
The V200 Pro is a powerful, intelligent circuit tester designed for professionals and DIY users alike.
Understanding how each mode operates — Mode I/ Mode II — helps you get the most accurate results and prolong the lifespan of your device.
If you encounter any issues, don’t hesitate to reach out to our support team.
We’re here to help you make diagnostics simple and efficient.



