If you operate a Riso Risograph printer (commonly models like the RZ, RP, or RN series), seeing an error code flash on the display can immediately halt your production workflow. One specific error that confuses many users is A16-525.
If the error persists on a clean drum, it is likely an optical detection issue. riso error a16-525
Clean it: Wipe the black strip with a dry, lint-free cloth to remove paper dust. or RN series)
Sensor Obstruction: A small piece of master paper might be blocking the "Box Full" or "Compression Home" sensor. Use a can of compressed air to gently blow out dust from the disposal assembly. riso error a16-525