Z Switch Broken - ER05

This message indicates that there is a problem with the Z limit switch.

The Z limit switch is located at the back of the bottom panel of the Ultimaker 2. This switch ensures that the build plate won't move down any further when it reaches the bottom. When this error message appears, it means that the Z limit switch isn't activated.

Z_Limit_Switch.jpg
The Z limit switch is located at the back of the bottom panel, on the inside of the Ultimaker

If this error appears, there can be several causes:

Something is blocking the switch It is possible that something is preventing the switch from being pressed. Ensure that there are no objects under the build plate, or small pieces of filament around the Z switch.
The switch mechanism is defective Manually lift the build plate and press the Z switch. You should hear a clicking sound. If it does not click properly, the switch mechanism could be defective and may need to be replaced.
The limit switch is not connected If the switch appears functional, but still does not activate, it may not be connected correctly. Carefully place the printer on its side, remove the bottom cover from the mainboard, and check the black cable connected to 'Z STOP'. Reconnect it if necessary.
The Z motor is not moving This error can also appear if the Z motor is not moving at all when expected. Try moving the build plate via the menu. If there is no response, the motor or the driver on the mainboard may be defective.

For further assistance with these troubleshooting steps, please submit a support ticket.

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