IFB washing machines did not have a specific "E4" error code. Error codes can vary depending on the model and version of the washing machine, and manufacturers may update or change error codes over time.
To get accurate and up-to-date information on the error codes for a specific IFB washing machine model, I recommend referring to the product's user manual or contacting IFB customer support directly. They will be able to provide you with the most relevant and accurate information for troubleshooting the error.