SunSpec Controller Comms Lost

What does F93 mean?

This Automatic Fault occurs when communication with the SunSpec controller has been lost. This impacts data exchange and control for any SunSpec compliant devices integrated into the system.

• Communication cable (e.g., Modbus RTU RS485, Ethernet) between the SunSpec controller and the gateway/inverter is disconnected, damaged, or improperly terminated.
• SunSpec compliant device (e.g., PV inverter, energy meter) has powered down, malfunctioned, or stopped responding to SunSpec queries.
• Incorrect Modbus ID or IP address configured for the SunSpec device on the gateway or XW Pro (e.g., Parameter S1-01 for Modbus ID).
• Gateway device failure to properly poll or relay data from the SunSpec controller due to internal fault.
• Network or RS485 bus conflicts (e.g., duplicate Modbus IDs, excessive bus length, improper biasing or termination resistors).

Click steps to track your progress.

1. 1

   1. Verify that the SunSpec controller and any associated devices are powered on and their communication indicators are active.

2. 2

   2. Inspect the communication cable (e.g., RS485 A/B wires, Ethernet) between the SunSpec controller and the inverter/gateway for physical damage and secure connections.

3. 3

   3. Check the Modbus ID (e.g., Parameter S1-01) or IP address configured in the inverter/gateway for the SunSpec device and ensure it matches the actual device setting.

4. 4

   4. Using a Modbus testing tool, attempt to communicate directly with the SunSpec controller to verify its responsiveness.

5. 5

   5. Power cycle the SunSpec controller and the gateway/inverter to reset communication modules and re-establish connection.