Häfele WT 200 Instructions De Montage Et De Maintenance page 84

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3. Remove the cover on the controller.
Fig. 23: WTC 200 controller without cover
Fig. 24: Plug-in connections between controller and add-on module
4. Clip on add-on module.
NOTE
Risk of damage to the controller and add-on module!
• Proceed with caution when clipping the add-on module onto the
controller.
• Push the module down without forcing it.