🖨️ Printer is not working

If a printer suddenly stops working, it is most often a temporary router communication issue. Please follow the steps below in order.

1) First, turn the router off and on again

Router example

The router is usually the device with antennas. Unplug the power cable of the device that looks like the photo, then plug it back in later.

  1. Turn off the router. Unplug the router power cable.
  2. Wait about 5 minutes. Do not turn it back on immediately. Leaving it off for about 5 minutes helps clear temporary network issues and reconnect cleanly.
  3. After 5 minutes, plug the router back in. Wait another 2–3 minutes until the internet and network are fully connected.
  4. Turn the printer off and on again. Then try printing again from POS (order or test print).

📌 Most temporary printer connection issues are fixed by fully powering the router off and on again like this.

2) If it still does not work, check the LAN connection

Check that the LAN cable at the back of the printer is firmly plugged in, and that the LAN port lights are on.

POS printer OK A properly working printer should have two lights on the LAN port.

3) If it still does not work, check the IP with Self Test

Print a Self Test from the printer, then compare the IP on the slip with the IP set in POS.

  1. Watch the video below and print a Self Test from the printer.
  2. On the Self Test slip, find the IP Address section.
  3. Compare it with the printer IP in POS settings. If they are different, make them match.
▶ Watch: How to print Self Test
Self Test IP Address

On the Self Test slip, find the IP address line (marked in red).

Printer IP settings in POS

Then compare it with the IP ADDRESS in POS. If they are different, make them match.

🧾 How do I set the printer IP?

You can easily configure the printer IP using the setup tool. Please follow the steps below.

  1. Click the link below to download the printer IP configuration tool. [Download Now]
    2. ※ Antivirus software may occasionally block the installation. If this happens, please temporarily disable it and proceed. This program is safe.
  2. Run the downloaded file and complete the installation.
  3. After installation, open the program and connect the printer to your laptop. The cable is included in the printer box.
    4. Printer IP Tool Printer IP Tool
  4. After connecting the printer to your laptop, launch the program. Make sure the settings match the image. Enter your desired IP in the "New IP" field, then click the "Set New IP" button. A "beep" sound means the IP has been successfully updated.
    5. Printer IP Tool Example of the printer IP setup tool interface
📡 Order POS is not connected

The counter POS and order POS must be on the same Wi-Fi. If not connected, please check the following:

  1. Make sure the order POS is not connected to a different Wi-Fi.
  2. Verify that the entered counter POS IP address is correct.
  3. Restart the router if there might be an issue.
step1

This image shows step 2. Accessing the network settings on the counter POS.

step2

This image shows step 2. Checking the IP address on the counter POS.

step3

This image shows step 2. Opening the IP input screen on the order POS.

step4

This image shows step 2. Entering and saving the correct IP on the order POS.

🌐 How is billing handled?

Billing is handled via the KAdmin app. Go to [More → Invoice] to check unpaid and paid bills. After making payment, upload the screenshot to confirm billing automatically.

  1. Open the KAdmin app and go to [More] → [Invoice].
  2. Check your unpaid and paid invoice list.
  3. Make the payment based on the invoice amount.
  4. Upload a screenshot of the payment — the system will confirm it automatically.
kadmin invoice list

This is the invoice list in the KAdmin app.

upload receipt

Upload your payment screenshot here.