¶ 1. Phenomenon Description
The screen displays: “Error: key 2022. Unknown exception.”
¶ 2. Cause analysis
Home failure due to incorrect unboxing installation and wiring.
Damaged pin connectors of motor wires and limit switch wires.
Home failure due to faulty limit switches or motors.
Foreign objects interfering with limit switches during homing.
¶ 3. Troubleshooting
- Check if each step of assembly is properly wired. Pay attention to whether the X and Z-axis and limit switch wires are connected correctly. (Refer to the Ender-3 V3 Plus Unbox Video)
- Check if the pin connectors of X and Z-axis motor wires and limit switch wires are bent or missing; replace corresponding parts if pins are bent.
- Check if X and Z-axis motor and limit switch wires are tightly connected, loose, misaligned, reversed, or damaged; replace corresponding wires if damaged.
- Route the hotend cable and PTFE tube outside the bracket, refer to the latest unboxing video. (Refer to the Ender-3 V3 Plus Unbox Video)
- Note that the fixing screws of both brackets should be installed facing outwards; installing them inwards will cause homing failure.
- Power off, then move the hotend to the center above the hot bed. Power on and click XY homing separately, then manually trigger the Z-axis limit switch in advance during the upward movement of the hotend to see if it stops rising. Then trigger the X-axis limit switch to see if the leftward movement stops. Then turn off the device to prevent pressing on the hot bed (Please watch the X-axis during operation to prevent hurting your hand during homing). Check if the limit switch wiring is normal and if there's any wire damage. If the phenomenon is normal, the limit switch is fine; if abnormal, it's a problem with the limit switch wire or switch itself.
- Power off, then move the hotend above the hot bed. Unplug the X motor wire, power on and click XY homing to see if it moves upwards. And then power off to prevent collision. Reconnect the X motor wire before you unplug the Z motor wire. Power on the printer and click XY homing to see if it moves upwards. Then power off to prevent collision. If both motors move, it indicates that X and Z motors are normal. If either motor doesn't move, it indicates the corresponding motor is faulty. Record the faulty video to share it to cs@creality.com