G36S supports two LEDs for the Zynq UltraScale+ MPSoC as error status indication namely PS_ERROR_OUT and PS_ERROR_STATUS (these are dedicated Processor systems(PS) control pins). These LEDs indicates if there is malfunction in the system.
PS_ERROR_OUT is asserted for accidental loss of power, a hardware error, or an exception in the PMU and not booting.
PS_ERROR_STATUS indicates a secure lockdown state. Alternatively, it can be used by the PMU firmware to indicate system status.
For more details, please refer section MPSoC Configuration & Status and LED number in iWave Hardware User Guide.
For further inquiries, please get in touch with mktg@iwave-global.com
Please find the detailed G36S product information in the below link,