Ethernet communication fault

What does EHR mean?

This fault appears when Ethernet communication is interrupted by physical factors, especially when Pr.1431 (Ethernet signal loss detection function selection) is set to a value between '1' and '3'. It signifies a physical layer problem with the Ethernet connection to the inverter.

• Disconnected or damaged Ethernet cable (RJ45 connector, internal conductors).
• Network switch or router failure preventing data transmission.
• Incorrect IP address, subnet mask, or gateway settings on the inverter (e.g., Pr.1408 to Pr.1413).
• Excessive network traffic (broadcast storms) or collisions causing communication timeouts.
• Physical damage to the inverter's Ethernet port or internal communication module.

Click steps to track your progress.

1. 1

   Verify the physical Ethernet cable connection at both the inverter and the network switch, ensuring the cable is securely latched.

2. 2

   Check the link status LEDs on the inverter's Ethernet port and the connected network switch port (should be green/solid).

3. 3

   Ping the inverter's IP address (set in Pr.1409) from a connected network device to verify basic network connectivity.

4. 4

   Inspect the Ethernet cable for physical damage (kinks, cuts) and test its continuity using an Ethernet cable tester.

5. 5

   Review Pr.1431 (Ethernet signal loss detection function selection) and associated timeout parameters to ensure they are appropriate for the network environment.