Error description 237-1301B
Error message
1301B UM: FO signal weaker than minimum value CC%2 %1 (value=-%4dB)
Cause of error
- The signal strength of the fiber optic connection (fiber optic cable to the UM converter) has fallen below a permissible minimum value
Error correction
- Check the fiber optic connection:
- Is the green LED on?
- Is the optical fiber plug fully engaged?
- Is the tip of the optical fiber clean?
- Ensure the proper bend radius
- Exchange the optical fiber