WT-VCS11视频字符叠加模块与单元控制器一起放置，监测室内机监视按键确定是否叠加字符，监测短消息命令以便接收短消息。短消息在室内机屏幕底部2行循环显示。-Video character overlay module is placed together with the cell controller to monitor the indoor unit to monitor key to determine whether the character overlay, monitor command in order to receive SMS text messages. Short message in the bottom of the screen 2-line indoor cycle.