'Move the cover down.'

def close_cover(self, **kwargs):

    set_req = self.gateway.const.SetReq
    self.gateway.set_child_value(self.node_id, self.child_id, set_req.V_DOWN, 1)
    if self.gateway.optimistic:
        if (set_req.V_DIMMER in self._values):
            self._values[set_req.V_DIMMER] = 0
        else:
            self._values[set_req.V_LIGHT] = STATE_OFF
        self.schedule_update_ha_state()
