69Troubleshooting“The device may be incompatible.Remove the device and check themanual supplied with the connecteddevice.”z A communication time out occurs if an operation takes too long or if it takestoo much time to send data. This may cancel printing. In such cases,disconnect and reconnect the USB cable.When printing from a PictBridge compliant device, depending on the modelor brand of your device, you may have to select a PictBridge compliant printmode on the device before connecting it to the machine. You may also haveto turn on your device or select Play mode manually after connecting thedevice to the machine. Perform necessary operations before connecting yourdevice referring to its instruction manual.If the error is still not resolved, check if you can print another photograph.z Check your device connected to the machine. Only PictBridge compliantdevices or the optional Bluetooth Unit BU-20 can be connected to themachine for direct printing.“The remaining level of the following inkcannot be correctly detected.Replace the ink tank.”U130The remaining ink level cannot be correctly detected. (The lamp on the ink tankflashes.)Replace the ink tank and close the Scanning Unit (Printer Cover).Printing with an ink tank that was once empty may damage the machine.If you want to continue printing in this condition, you need to release the functionfor detecting the remaining ink level. Press and hold the Stop/Reset button forat least 5 seconds, and then release it.With this operation, releasing the function for detecting the remaining ink level ismemorized. Please be advised that Canon shall not be liable for any machinemalfunction or damage caused by refilled ink tanks.See “Replacing an Ink Tank” on page 43.NoteIf the function for detecting the remaining ink level is disabled, the ink tank ingray is displayed in the remaining ink volume screen on the LCD.See “Getting the Ink Status Information” on page 43.“The following ink tank cannot berecognized.”U043U140U150z The ink tank is not installed. Install the ink tank.See “Replacing an Ink Tank” on page 43.z The ink tank is not compatible with this machine. (The lamp on the ink tank isoff.)Install an appropriate ink tank.See “Replacing an Ink Tank” on page 43.z An ink tank error has occurred. (The lamp on the ink tank is off.)Replace the ink tank.See “Replacing an Ink Tank” on page 43.“****Printer error has occurred.Turn off power then back on again. Ifproblem persists, see the manual.”Turn off the machine, and unplug the power cord of the machine from the powersupply. After a while, plug the power cord of the machine back in, and then turnon the machine. If the same error occurs, contact a Canon servicerepresentative.“Scanner is not operating correctly.” Turn off the machine, and unplug the power cord of the machine from the powersupply. After a while, plug the power cord of the machine back in, and then turnon the machine. If the same error occurs, contact a Canon servicerepresentative.“The card is currently write-enabled.Set to read-only mode beforeperforming operation.”The Card Slot is set to Read/write mode.You cannot print in this mode. After writing on the memory card, set to Read-only mode again.“An unsupported USB hub isconnected.Remove the hub.”If a PictBridge compliant device is connected via a USB hub, remove the huband connect it directly to the machine.Message Action