HP Printer, CP5225, Error message, Right door open, door is shut but will not reset error?

The official HP website page for trouble shooting the printers HP OfficeJet Pro X series - Resolve paper jams including "Print Zone" jams ' HP® Customer Support

Did you have the printer powered off before you installed the belt? If not the fuse has blown and the message will be on until you replace the belt again.

Recommended action

1. Close the door.
   

2. Use the right-door switch (SP15) test in the manual sensor test to verify that the switch is properly functioning. If the switch fails the test, replace the switch.
   

3. Check the sensor flag on the right door assembly. If it is damaged, replace the door assembly.
   

4. If the product has been recently serviced:
   

   1. Check the connector (J708) on the 24V interlock switch and the connector (J181) on the DC controller PCA.
      

   2. Reseat the formater board and retest.
      

   3. Reseat the ICB and retest.
      

right door is a right side of paper try
check if there is paper jam in this try

this all i manage to find for hope it helps

55.x Error
Error Message
55.X Error
Turn off then on
Description
The printer has experienced an internal error. The printer may experience one of the following errors:
55.0 DC controller communication error
55.0601 DC controller NVRAM data error
55.0602 DC controller NVRAM access error
55.1 DC controller memory error
Action
Turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the printer to initialize.
If a surge protector is used, remove it. Plug the printer directly into the wall socket. Use the power switch to turn on the printer.
If the message persists, contact HP support.

You need to first check the connection between the dc controller and the formatter and if the connection is fine you need to replace the dc controller.

I have an Hp Officejet 5110. I have an error message saying "Open door,clear carriage jam, then press enter". But where is its door? How can I clear the carriage jam?

I tried pressing the # & 6 at the same time, but the error message still there.