Figure 6. Microtech Iii Chiller Unit Controller Password Menu And Main Features - McQuay MicroTech III Installation And Maintenance Manual

8. Navigate back to the Modbus Setup menu, and verify the settings of all parameters. This
procedure may take a minute while the Modbus Communication Module powers up.
Verifying the Modbus Data Transmission Rate
The options for baud rate (in bps) include: 9600, 19200, 38400, and 76800. The factory default baud
rate is 38400 bps. Follow the steps below to change the baud rate for desired network speed.
1. If you have not already entered a password, select Enter Password from the Main Menu screen
(i.e. turn the circular knob on the unit controller until the cursor is in the proper location) and
press Enter (i.e. press down on the knob). See Figure 6.
a. If you are not at the Main Menu and need to enter a password, press the Back button from
any other menu screen until you reach the Main Menu and follow step 1. See Figure 6 for
the location of the Back button.
b. If you have already entered a password, skip to step 3. See Figure 6 if you are not certain
whether or not a password has been entered.
2. Enter Password: 5321.
3. Scroll down to View/Set Unit (i.e. turn the knob clockwise) and press Enter.
4. Scroll down to Modbus Setup and press Enter.
5. Verify the Baud Rate as required by the network and change if necessary.
6. Change "Apply Changes" from No to Yes.

Figure 6. MicroTech III Chiller Unit Controller Password Menu and Main Features

If a password has
been entered, a
numerical value
appears (in this case,
2)
12
Back button
Circular knob (press down
to Enter value)
IM 969