Hello, and sorry you're having problems. We are now connected on this website- which saves you money over having a Tech come to your home, and in many cases we can fix the problem you're having. In other cases, these things do require additional parts to fix. But I can help you with that as well.
The "UE22" error on any Pioneer HT receiver, is generated by the DSP processor chip in the receiver, and it's caused by either the software failure on this chip (about 25% of the time), or more often by this chip needing to be re-heated using a heat gun to re-flow the solder on the PCB around it. The reason for this is the chip generates a LOT of heat and the solder joints on the PCB expand and contract causing them to lose contact.
If you have not already, I would suggest trying to update the Firmware of the receiver. The instructions to do so, as well as the update itself, are available at the link below through Pioneer:
If this does not work, or works "intermittently" (meaning you can get some time of playback, but a random occurrence of the UE22 error), then unfortunately it does require the receiver be brought in to BB to have them send it out to Pioneer to fix or replace the SP chip as needed.
Feel free to reply back if you need more help, or want to reply back with more details. It does not cost you anything more to reply back once you've rated. Please do rate me positively (at least 3 STARS) and I will continue with you until this is sorted. The positive rating ensures I am credited for my work.