Chapter 1 Product Overview Unrecoverable Errors The printer cannot print when an unrecoverable error occurs. Turn the printer off and then back on. If the error still occurs, the printer may be defective. Contact qualified service personnel. 23 Error (Error code) Description High voltage error (AKA41) Abnormal power supply voltage (high voltage) was detected. Low voltage error (AKA42) Abnormal power supply voltage (low voltage) was detected. Unrecoverable error (A9999) Other unrecoverable error is detected.