Description: Whenever there's an error scanning (EG - double feeding), the Panasonic user utility will report the error code. See example (Error Code: U18-18080000):
1. Match the classification code (the first 3 digits prior to the dash). In my example error code above, we see that a U18 means that "paper remains in the scanner, or dust is attached around a sensor."
2. The next two digits are the ST1 code. In the above example, we have an 18 for the ST1. Let's find what an 18 for the ST1 generally means -
1x refers to a paper jam error. Let's narrow that code down further -
U18 with an ST1 of '18' means "document remains in scanner (ST2 Sensor information)." The ST2 are the next two digits of the error code. Ours is a 08. Let's move onto the next diagram to further troubleshoot -
A 08 in binary is the fourth position on the binary scale (read from right to left - 0 0 0 0 1 0 0 0). We see from the above diagram that this is labeled as bit 3. If bit 3 (the exit sensor) is on, ST2 will be an 8.
So in summary, we traced this U18-18080000 error code to find out what physically is wrong with this scanner. It's a paper jam being read by the exit sensor. To fix, we need to clear out dust/debris from this sensor.