!
error HP
Error Code 22 Serial I/O Buffer Over
Serial input/output buffer overflow error.
? What Causes This
Data is being sent to the printer faster than it can process via serial connection.
✓ How to Fix It
- Press the Go button to continue.
- Reduce data transfer rate.
- Check serial cable connection.
Source: page 142 of the official manual
From the manual
This error code appears in:
HP Laserjet 1010 Printer