Ethernet Physical Layer Fault

What does PHY4 Off mean?

The PHY4 Green LED is OFF, indicating a fault in the Ethernet physical layer. This typically suggests a hardware issue with the network communication interface on the CCU_SR module, preventing reliable network connectivity.

• The Ethernet Physical Layer (PHY4) has detected a fault.
• Damaged or disconnected Ethernet cable.
• Faulty network interface card (NIC) on the device.
• Signal integrity issue on the Ethernet link.
• Problem with the PHY chip on the board.

Click steps to track your progress.

1. 1

   Exchange the CCU_SR module, as the fault is internal to its Ethernet communication hardware.