Liebert Autochangeover Controllers AC4 用户手册

After creating and setting up a connection, use a communications program such as HyperTerminal to 

access the AC4’s Service Terminal Interface.
1. Verify communications connections between the remote computer and the AC4. Connect a null 

modem cable from the computer’s COM1 port to the AC4’s RS232 port (for location, see 3.4 - 

RS232 Connector).

2. Start the HyperTerminal program—click on the Start button, then on Programs, then 

Accessories, then Communications, and finally HyperTerminal. 

3. Open the AC4 connection created in A.2.1 - Create a Connection. To do this, click on File, then 

on Open, as shown below.

4. In the Open window, shown above right, select the file name—AC4.ht in this example—and then 

click on the Open button.

5. Press Enter (or Escape) to initiate communication and bring up the Main Menu. 

For more information on the AC4’s options:

• See A.3 - Overview of Menus for examples of the Service Terminal Interface screens.
• See Table 21 to locate step-by-step instructions for each AC4 function.