QL-820NWB/820NWBc

FAQs & Troubleshooting

What do the indicator lights mean?

The indicators light and blink to indicate the printer's status. The following symbols are used in this FAQ to explain the meaning of the different indicator colors and patterns.

or or or	Indicator is lit in the color shown
or or or	Indicator is flashing in the color shown
	Indicator is off

Status LED	LCD message	Condition	Solution
	－	Feeding mode	－
		Cutting mode
		Cleaning mode
		Initializing mode
	Printing	Printing mode
	Mass Storage Mode	Mass storage mode
	WPS Setting	WPS setup mode
	Working…Please Wait	Network preparation mode
	Working…Please Wait	Platen roller is rotating
	－	Canceling print job	－
	－	Searching for printer using AirPrint from a mobile device
	Working…Please Wait	Print preparation mode
	Receiving	Receiving data
	Downloading	Transferring data
	Working…Do not Power off	Overwriting data
	Can't Enter Template Mode	Template transition error	Transfer the template from the device to the printer.
	Network Setting Error	Network setting error	Confirm that the SSID and password are correct, and then connect again.
	Invalid SSID	SSID input/setting outside of allowable range error	Enter at least one character.
	Invalid Password	Password input/setting outside of allowable range error	Enter eight or more characters for the password.
	Incorrect Password	Incorrect password error	Enter the correct password.
	－	The DK Roll Compartment Cover is open.	－
	－	System OFF mode	－
(Once every 0.5 second)	Cooling	Cooling mode	Wait approximately 10 minutes, and then try printing again.
	－	Boot mode	Turn off the printer and then turn it on again. If the problem still occurs, contact Brother Customer Service.
(Once every 1 second)	Roll Paper Cannot Be Fed	Media end error	Replace the DK Roll with a new one. If there is sufficient roll remaining, install the DK Roll correctly. → Click here to see how do I install/change the label roll
	Roll Paper Cannot Be Fed	Feed error	Insert the end of the DK Roll correctly.
	No Roll	No media error	Load the DK Roll. → Click here to see how do I install/change the label roll
	Wrong Roll Type	Wrong media error	・For 2-color printing, make sure that the Black/Red on White DK roll is installed. ・If you use the Black/Red on White DK roll for monochrome printing, you need to activate the [Two-color Mode]/[2-color [Black/Red]] settings on each application. For details, see the FAQ "2-color Printing is not possible". ・Load the correct DK Roll. → Click here to see how do I install/change the label roll
	Cover Open	Cover open error	Close the DK Roll Compartment Cover correctly.
	Communication cmd Error	Communication error	・Transfer of the data failed. When sending a template as a .blf file, the model name in the file is different. → Check the data and the connection status between the printer and the computer. → Click here to see how do I connect the printer to my computer via Wi-Fi? → Click here to see how do I connect the printer and my mobile device via Bluetooth? ・The wireless LAN or Bluetooth^® connection was interrupted. Turn off the printer, and the turn the printer on again. → Click here to see how do I connect the printer to my computer via Wi-Fi? → Click here to see how do I connect the printer and my mobile device via Bluetooth? ・For Windows If this error occurs during 2-color printing, click the [Print] button in P-touch Editor, and then change [Output] to [Standard] in the [Print] dialog box that appears. If [High Resolution] is selected, you cannot use 2-color printing.
	Data Too Large	Memory full error	Reduce the size of the print data or delete unnecessary files, and then transfer the data again.
	Data Too Large	USB host memory full error	Try scanning the barcode after a while again.
	BLF file - Incorrect	BLF file error	Confirm that the model supports .blf files, and then transfer the data again.
	JPEG file - Incorrect	JPG file error	Confirm the size of .jpg files, and then transfer the data again.
	Database Search Error	Database search error	・There is no database with the specified number. Specify a correct number. ・The search for a template with a linked database fails. → Search again.
	Incorrect Template Selected	No template error	・There is no template with the specified number. Specify a correct number. ・When printing a template, the specified template does not exist. → Select the correct template, and then print again.
	WPS Timeout	Access point search error	・The access point could not be found. → Try to connect again. ・An access point for establishing a connection could not be specified. → Confirm the WPS setting environment (distance between the access point and the printer, presence of obstructions, and so on) for the access point, and then configure the WPS settings for the printer again.
	Wireless LAN Setting Error	Access point connection error	If you are using two or more access points, reduce the number of access points to one, and then connect the printer again.
	Wireless LAN Setting Error	Access point setting error	Set the encryption method of the access point to a method other than WEP, and configure the wireless LAN settings using WPS. For more information about setting the encryption method of the access point, see the instructions provided with your access point.
	WPS Invalid Data Received	Security error	Configure the wireless settings using WPS again.
	Data Updating Error	Data update incomplete error	Confirm the status of the network connection, and then update the data again.
	Battery Empty	Charging required error	Connect the AC adapter to the printer.
(0.9 second off + 0.3 second flashing)	Cutter Error	Cutter error	Do not open the DK Roll compartment cover when the cutter is operating. To clear this error, press any button.
	USB Device Non-compliant	USB host excessive power supply error/USB host non-compliant device connection error	Replace the USB host with another USB host that is compliant. This printer is compatible with HID-class USB devices.
	USB HUB Non-compliant	USB hub connection error	Disconnect the USB hub.
	Mass Storage Error	Mass storage error	The file system becomes corrupted or a file is copied while a mass storage file is being processed. Turn off the printer and then turn it on again.
(Once every 0.3 second)	System Error	System error	Turn off the printer and then turn it on again. If the problem still occurs, contact Brother Customer Service.