Error: "920 Service Fuser Error"; Error: "921 Service Fuser Error"; Error: "922 Service Fuser Error"; Error: "923 Service Fuser Error"; Error: "924 Service Fuser Error"
A Service Fuser message means that the printer has detected some sort of problem with the fuser unit installed on this printer. The fuser unit is the part of the printer that heats up to fuse the toner onto the page. The meaning of the fuser error depends on the error code number associated with it.
The first thing to do for any fuser error is to power off the printer. Let it rest for one minute or more, then power it back on. See if the fuser error returns. If not, continue printing as before. This may have been an isolated incident.
If the fuser error returns, you can try reinstalling the fuser unit. The fuser unit on the Optra N series printers is customer-installable. You can get to it by opening the left access door of the printer. Please click here if you need specific instructions on how to replace the fuser unit. In addition, make sure there is nothing stuck inside the fuser unit (a piece of paper or other item). There is a fold-down door flap on the fuser unit itself. Open this door flap and look inside for any jammed items. Caution: Remember to give the fuser time to cool off first. Twenty minutes or more should be fine.
If powering the printer off and on and reseating the fuser unit do not clear this error, the printer will probably need service. In most cases, the fuser unit will need to be replaced. However, other parts can also cause these errors. See below for a list of the possible fuser errors you can receive on the Optra N series printers and what each error means.
920, 921, or 922 FuserError: The printer thinks the fuser unit is not heating up to the correct operating temperature. This can be due to a bad fuser lamp or possibly no power getting to the fuser unit. As a customer, the only other thing you can do is to check the connections on both the fuser unit and where it goes into the printer. Make sure neither connection is damaged. If you are a technician working on the printer, you can check the voltage coming off the system board and Low Voltage Power Supply (LVPS) to make sure power is getting to the fuser unit. 923 FuserError: The printer thinks the fuser unit is overheating or heating up too fast. As a customer, the only action you can take is to power the printer off and on and see if anything is jammed within the fuser unit. If you are a technician working on a printer, check the fuser unit for any shorted components. Also check the main power supply unit. 924 Fuser Error: The printer thinks the wrong fuser unit is installed. The most common cause of this problem is that a 220 Volt fuser is installed in a 110 Volt machine, or vice versa. Be careful not to use a similar-looking fuser unit intended for another printer model in this printer. Even though the fuser unit may look identical, it can trigger this error message (sometimes even after the new fuser has been working in the printer for a few weeks).