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Operation Manual
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This manual includes information relative to the operator level of parameters; data and setpoints necessary for the every
day operation of the chiller. There are more extensive menus available for the use of service technicians.
12.2 Navigating
When power is applied to the control circuit, the controller screen will be active and display the Home screen, which can
also be accessed by pressing the Menu Button The navigating wheel is the only navigating device necessary, although
the MENU, ALARM, and BACK buttons can provide shortcuts as explained later.
12.2.1
Passwords
The home screen has eleven lines:
•
Enter Password, links to the Entry screen, which is an editable screen. So pressing the wheel goes to the edit mode
where the password (5321) can be entered. The first (*) will be highlighted, rotate the wheel clockwise to the first
number and set it by pressing the wheel. Repeat for the remaining three numbers.
The password will time out after 10 minutes and is cancelled if a new password is entered or the control powers down.
•
Other basic information and links are shown on the Main Menu page for ease of usage and includes Active setpoint,
Evaporator Leaving Water Temperature, etc. The About Chiller link connect to a page where is possible to see the
software version.
Main Menu
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Enter Password
Unit Status=
Auto
Active Setpt=
xx.x°C
Evap LWT=
xx.x°C
Unit Capacity=
xxx.x%
Unit Mode=
Cool
Time Until Restart
>
Alarms
>
Scheduled Maintenance
>
About Chiller
>
Figure 9, Password Menu
Enter Password
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Enter
****
Figure 10, Password Entry Page
Entering an invalid password has the same effect as continuing without a password.
Once a valid password has been entered, the controller allows further changes and access without requiring the user to
enter a password until either the password timer expires or a different password is entered. The default value for this
password timer is 10 minutes. It is changeable from 3 to 30 minutes via the Timer Settings menu in the Extended Menus.
