Hi, thanks for your comment regarding the E1 error code on your Digital Rice Cooker 3000 Series (HD4518). The E1 error code typically indicates a technical defect with the rice cooker. Here are a few steps you can try to resolve the issue: 1. Unplug the rice cooker from the power source, wait for a few minutes, and then plug it back in. Sometimes, a simple reset can resolve the error. 2. Ensure that there are no obstructions or debris in the heating element or the inner pot. Clean the inner pot and the heating element thoroughly. If the error persists, we kindly advise you to contact our customer service team for further assistance. You can reach out to us through one of our Social Media channels, or the support page on our website.
Hi there, thanks for your interest! You can find an overview of the features of both models on the following page: to.philips/6051pNkcP. The HD4518 comes with 18 meal occasion programs, the HD4515 with 8. The HD4518 comes with a Maifanshi coating inner pot, the HD4515 with a Bakuhanseki coating inner pot. Next to that, the models differ when it comes to the display and colour. If you have any other questions, don't hesitate to let us know. Wishing you a good week!