Hi! I'm getting the following message on my computer screen: Error Number : 306 A communication error has occurred. Make sure that the printer is plugged in, powered-on, and properly connected to your computer. Then try printing again. But everything is plugged in properly. I just printed something, then one minute later when I went to print something else, it wouldn't let me! Please help!!

It would be helpfulful if your query listed the OS of the computer connected to the printer as failure to do so makes a respondant have to address multiple solutions.

The solution common to both Windows and Mac computers generally involves removal of the printer from listings as a device attached to the computer followed by reinstallation of the printer. With the Apple computers:

1. Click the Apple icon in the top left of the screen.
2. Click System Preferences.
3. Click Print & Fax.
4. If the padlock in the bottom left is locked:
   Click it, enter your password and click OK.
5. Click the - button. to remove the printer and the + to add it again leaving the options on default.

These common procedures are listed on: https://www.fixkb.com/2009/02/mac-canon-printer-error-306_1485.html

Basically, after removing the printer programmatically and detaching it from the computer, reattach it and follow the installation dialogue boxes. If there is a glitch (failure to install), try installing the drivers manually.

If the OS is Windows then remove the printer using the printers and scanners menu, then just follow the add printer dialogues. As with the Mac's, if installation fails, try installing the drivers manually.

The 306 error refers to a "communications" error between computer and printer.

Can you verify the error code? 092-315 does not appear in the error code site. See link below

How To Search for a Fault Code WC7220 / WC7225 Fault Code Page
To search on a fault code, enter one code at a time. The codes will be displayed on the Touch Screen.
Fault code format: A 3-digit number, followed by a 3-digit number. For example, 010-352.
Viewing Fault and Alert Messages on the Control Panel
When a fault or alert condition occurs, a message will be displayed on the Control Panel to inform you of the problem. Alert messages inform you about printer conditions, such as low supplies or open doors, that require your attention. Fault messages warn you about printer conditions that prevent the printer from printing or degrade printing performance. If more than one condition occurs, only one displays on the Control Panel.
To view a complete list of active fault and alert messages:

1. Press the [Machine Status] button on the Control Panel.
2. Select the [Active Messages] tab.
3. Use the Down arrow and select [Faults], [Alerts], or [Faults & Alerts].
4. To view details, select a fault or alert.

Viewing the Fault History on the Control Panel
When faults occur, they are logged in to a fault history file by date, time, and fault code. Use this list to identify trends and resolve problems.
To view the fault history:

1. Press the [Machine Status] button on the Control Panel.
2. Select the [Active Messages] tab.
3. Select [Fault History]. The screen displays the number, date, time, and image count for each fault code.

The following table represents the system area as represented by the first 3-digits of the fault code:
Chain Description 303 Communications Error 305 Duplex Automatic Document Feeder (DADF) 310 Fusing 312, 313 Finisher 371 - 375 Paper Tray Feed 377 Sensor / Interlock Fault 391 Drum Cartridge / Waste Toner

http://www.support.xerox.com/support/workcentre-7220-7225/support/enus.html

Error 306 is a communication error and should have nothing to do with the cartridge. Check to make sure the printer is plugged in and restart your computer, and try again.

It could be a communications error message, the printer is not communicating with the computer.

Disconnect and then reconnect the USB cable.

Disconnect and then reconnect the printer power cable.

Restart the computer.

Remove and reinstall the printer software

If your printer does not function properly or communication error messages appear when using your printer, you can remove and reinstall the printer software.

1. Click Start®Programs or All Programs®Dell Printers®Dell Photo AIO Printer 962®Uninstall Dell Photo AIO Printer 962.
   
   
2. Follow the instructions on the computer screen to remove the printer software.
   
   
3. Restart your computer before installing the software again.
   
   
4. Insert the Drivers and Utilities CD, and then follow the instructions on the computer screen to install the software.
   
   

If the installation screen does not appear:

1. In Windows XP, click Start®My Computer.
   
   

In Windows 2000, double-click My Computer from your desktop.

1. Double-click the CD-ROM drive icon. If necessary, double-click setup.exe.
   
   
2. When the printer software installation screen appears, click Install or Install Now.
   
   
3. Follow the instructions on your screen to complete the installation.
   
   

Communications error message
The printer is not communicating with the computer.
Communications error message
The printer is not communicating with the computer.

A communication error has occurred. reinstall drivers or change usb cable

That error message usually means you have a communication error. Make sure that the printer is plugged in, powered-on, and properly connected to your computer. Then try printing again
If that doesn't work, try this:
1. Start Home Applications, go to Utilities, select Utility Printer Setup
2. Hold down the "option" key and click on "More Printers" button
3. From the main menu, select "Advanced"
4. In the next dialog box, under Device: select field "LPD / LPR Host or Printer"
5. In the device of the "URL:" lpd://PCName/PrinterShareName
6. Click the "Add
If that doesn't work either, check your router settings.

frist u should check your printer port is install o r not in your computer . right mouse click on my computer then click onhardwere, then click
port,if not stall there is yello sign. instail it.
2/ if not work.re install softwere driver once a time.

I reloaded the printer driver and it worked again.

try to unplug it for a little bit and plug it back in and try it again let me know how this works

It is possible that your ink cartridge is damaged. Try using an old ink cartridge that worked before and try to print again.Even if the ink cartridge you are using is full of ink, when sensitive electrical components are damaged, it wouldn't work.

You can also try using a different printer to rule out the possibility that your computer is the problem.