After changing the batteries, you’re experiencing a problem with your SALTO XS4 Scandinavia lock. The flashing green and yellow lights could signify a specific error code, depending on the pattern of the lights.

However, it’s difficult to diagnose the problem without specific details about the blinking pattern or the model of your lock. Here are a few general troubleshooting steps you can try:

1. Check Battery Orientation: Make sure the batteries are installed correctly. It’s possible to put batteries incorrectly, which could cause the lock to malfunction.
2. Check Battery Quality: Ensure you’re using high-quality, new batteries. Sometimes low-quality batteries or old batteries can cause problems.
3. Reset the Lock: Try performing a factory reset on the lock. This should revert the lock to its original settings and may solve the problem. Please refer to your lock’s manual for specific reset steps.
4. Firmware Update: If your lock connects to a software system or app, a firmware update may be available to resolve the issue.
5. Contact Salto Support: If the problem persists, consider contacting Salto’s support team for further assistance.

Remember, these are general suggestions. Refer to the user manual or contact the manufacturer’s customer support for detailed troubleshooting.

For more Salto lock problems and troubleshooting, please check this article: Salto Lock Troubleshooting: Comprehensive Step-by-step Guide.