Troubleshooting

01
HW/SW Compatibility

Please note the corresponding compatibility between hardware and software revision.
The non-given functionality, as well as the incorrect parameters, may result from corresponding incompatibility.
Please use only the 1.X firmware and software revisions for hardware revision 1.X. This also applies to the current hardware revision 2.X and the associated software revisions.

02
I2C-Request timed out – I2C address change

Please first check the entire I2C bus using the sudo i2cdetect -a -y 1 command, the I2C address of the S.USV may have been moved to another address (e.g. 0x01, 0x00).
in this case please manually transfer the address to the susv.cfg located in the /opt/susvd directory and restart the daemon process
If I2C communication could be reactivated, you can reset the I2C address to the original 0x0f.

03
S.USV does not switch off completely

The problem indicates an incorrect configuration of the S.USV Daemon process.
Please first check that it is working correctly – go to the /opt/susvd directory and run the following command from sudo ./susvd -status

04
S.USV pi basic unexpectedly switches to secondary mode – Boot Cycle

Please note that the supply of various peripherals and activated charging circuit via the microUSB input of the single-board computer can lead to voltage drops at the GPIO power pins. The S.USV automatically switches to secondary mode at an input voltage of less than 4.75V and into shutdown with the daemon process activated.
To check the issue, please do the following:
• Shutting down the system
• Removing the S.USV solutions module
• Reboot the system and stop the S.USV Daemon process
• Restart the system with S.USV solutions module
• Optionally, you can now measure the input voltage directly at the GPIO pins
In most cases, the problem could be solved by a more powerful power supply with an output voltage of 5.25V. For systems with increased power consumption, we recommend to realize the power supply via the external input of the S.UPS, which can supply up to 3.5A.

05
S.USV ignores the return of power supply

In the secondary mode (battery operation) of the S.USV, current values are continuously determined and further processed in corresponding firmware routines. As a result, the modules are able to detect a return of the primary power supply, resulting in a significant reduction in power consumption via the secondary input. The intelligent software detects and determines the performance of the primary power source and responds accordingly.
If the S.USV module in secondary mode does not return to primary mode after the power source has returned, we recommend testing the scenario with more powerful power supplies.

06
Shutdown/Reboot Button S1 shows no reaction to actuation

For the function of the S1 Shutdown/Reboot button, a correct working of the S.USV Daemon process is necessary, which processes the corresponding signals further.
Please first check that it is working correctly – go to the /opt/susvd directory and run the following command from sudo ./susvd -status