There may be the following situations when WiFi cannot search for the printer. Please check and eliminate the problems one by one: 1. The printer is not turned on. Please check whether the power is connected and whether the power button is turned on normally. 2. The printer model is wrong. The WIFI function is limited to the K3W model. Please check and confirm whether the machine model is compatible. 3. The printer is not connected to the Internet. If this happens, refer to the WIFI connection method in the product manual to connect to the network. 4. The printer and the application end are not in the same LAN. Please check and adjust to keep both ends in the same LAN. 5. If the problem cannot be solved after eliminating the above situations, you can contact the online customer service below for problem consultation.

The printer not being detected via USB connection may be due to the following reasons. Please check each possibility one by one: 1. The printer is not powered on. Please check if it is connected to a power source and if the power button is on. 2. The USB cable is not connected. Please refer to the USB connection instructions in the product manual to connect the printer. 3. The driver is not installed correctly. Please refer to the driver installation instructions in the product manual to install the driver. 4. If the problem persists after checking the above, please contact our online customer service below for assistance.

If the printed label shows no content, the following situations may exist. Please check and troubleshoot one by one: 1. Please check if you are using thermal label paper. The K3 series products are thermal printers; please use the corresponding thermal label paper for printing. 2. Please check if the label paper is installed correctly. When installing, ensure that the printing surface of the label paper is facing upwards towards the print head. If you are unsure of the installation method, please refer to the label paper installation section of the product instruction manual for correct operation. 3. If the above situations do not resolve your problem, please contact the online customer service below for assistance.

If you experience label paper feeding issues, the following situations may occur. Please check and troubleshoot one by one: 1. Please check if the label paper is installed correctly. If you are unsure how to install the label paper, please refer to the label paper installation section of the product manual for correct operation. 2. Please check if the machine is jammed. You can open the paper tray cover, pull out the jammed paper from the print roller, reposition it, and then close the paper tray cover to try printing again. 3. Please check if the label paper in the machine's paper tray is empty. If it is, replace it with new label paper and try printing again. 4. Please check if the label type is set incorrectly. Ensure that the label paper type matches the selection in the software application. 5. If the problem persists after troubleshooting the above situations, please contact official customer service for assistance and resolution.

Unclear printing may be caused by the following issues. Please check and troubleshoot one by one: 1. Incorrect print density settings. Please adjust the print density settings in the software application. 2. Contaminated printhead. Please refer to the product manual for printhead cleaning instructions. 3. Dirty or damaged print roller. Please refer to the product manual for print roller cleaning and replacement instructions. 4. Worn printhead. If this occurs, please contact NIIMBOT customer service for printhead replacement. 5. Please check if you are using genuine NIIMBOT label paper. We recommend using genuine NIIMBOT label paper. 6. If the problem persists after checking the above, please contact our online customer service below for assistance.

If Bluetooth cannot find the printer, the following situations may occur. Please check the following one by one: 1. Check if the printer is powered on. Ensure the printer is plugged in and the power button is on. 2. The device connection limit has been reached. Disconnect other devices from the Bluetooth connection and try connecting to the printer again. 3. Confirm that your phone's Bluetooth function is enabled. If Bluetooth is enabled, search for and connect via Bluetooth within the app. 4. If the problem persists after ruling out the above issues, please contact our online customer service below for assistance.

If your printer is not printing or has stopped printing, the following situations may occur. Please check and troubleshoot one by one: 1. Power is not on. If the printer status light is not on, please check and ensure the power cord is properly connected. 2. Paper feed is abnormal. If this occurs, please check and confirm whether the label paper is installed correctly, whether there is a paper jam, and whether the label paper is exhausted. 3. Please check if the USB cable is loose. Ensure the USB cable on the back of the printer or the computer is not disconnected. 4. Please check if the Bluetooth connection is broken. Ensure the Bluetooth connection between the software application and the printer is normal. 5. Please check if the Wi-Fi connection is broken. Ensure the Wi-Fi connection between the software application and the printer is normal.

A constantly lit red indicator light on the machine may indicate one of the following issues. Please check each one in turn: 1. Check if the machine tray cover is closed. If not, close the cover and then check if the red light disappears. 2. If no labels are in the paper tray, the red light will remain lit. Insert labels and check if the red light continues to illuminate. 3. If labels were not fully pulled out of the paper tray, check and pull the labels out completely before closing the tray cover. 4. If the printhead temperature is too high, the red indicator light will remain lit. If the red light remains lit during continuous printing, stop printing and allow the printhead to cool down before resuming printing. 5. If a printing error occurs, the red indicator light will remain lit. Please follow the instructions in the software application. 6. If the problem persists after checking and troubleshooting the above issues, please contact the online customer service below for assistance.