CIB_SR Microcontroller I/O Node Internal Fault

What does STA1 (CIB_SR) Flashing mean?

The STA1 (CIB_SR) Orange LED is flashing at a rate other than 1 Hz (normal) or 10 Hz (boot phase), indicating an internal fault code within the CIB_SR microcontroller I/O node. This suggests a problem with the internal logic or operation of this node, potentially affecting I/O communication and functionality.

• Internal fault within the CIB_SR Microcontroller I/O Node (STA1).
• Software or firmware corruption on the STA1 microcontroller.
• Overheating of the STA1 module.
• Hardware failure of internal components within STA1.

Click steps to track your progress.

1. 1

   Verify the status of the PWR/3.3V LED (Item 6, Page 98). If it is lit, exchange the CCU_SR module.

2. 2

   If the PWR/3.3V LED is not lit, troubleshoot the 3.3V power supply (refer to 'PWR/3.3V Off (CIB_SR)' fault code for specific steps).

3. 3

   If power supply checks pass and the LED continues to flash, exchange the CCU_SR module.