This message is displayed when the mainboard underneath the machine can't connect with the board in the carriage.
Please check this article first to see if the clump sensors are causing this. If sensors are fine, it could be that the fuses in the carriage board got blown. Follow the next steps to address it:
1. With the machine turned off, take off the carriage box cover. With a 3mm hex key, remove the two screws from the sides.
2. Turn on the machine to see if the three red LEDs light up.
2.a. If the three LEDs light up as below, the fuses are okay. If that is the case and the "Waiting for carriage connection" message persists, please contact us at firstname.lastname@example.org to explore the issue together.
2.b. If none or only one or two red LEDs are on, turn the machine off and continue reading to inspect the fuses.
3. At the top right corner of the board, you have two little black boxes with fuses inside. Open them with a thin metal piece, like a flat screwdriver or similar.
3. Remove the fuses using the same thin metal piece you used to open the little black boxes.
4. Inspect both fuses. They should look similar to this - clear glass and unbroken wire.
4.a. If the fuses are okay, and the "Waiting for carriage connection" message persists, please contact us at email@example.com to explore the issue together.
4.b. If one or both fuses are damaged, replace them with a new one. Both fuses are identical. These are their specifications: