Principles of Operation of the
Module UCM-CLD
5
RLC-SVU02F-E4
Operator's Interface
Digital Display
The display of control regulation and
operating parameters, diagnostics,
and error messages is a 2-line, 40-
character, liquid-crystal display. The
display has a LED backlight to read
in low-light conditions and to warm
up the display under low ambient
temperatures. When powering up
the system, the display is not lit and
the message [SELF-TEST IN
PROGRESS] is displayed. The screen
can display error codes, settings of
various setpoints, specified
temperature and pressure values,
and the status of operating
parameters and options.
Keyboard
A 16-key touchpad allows both
navigation between menus and the
modification of parameters and
setpoints. The keys are divided into
two groups:
Individual Menu Keys
Control Keys
Chiller Report Menu
+ key
Custom Report Menu
-
key
Refrigerant Menu
Previous key
Compressor Menu
Next key
Operator Settings Menu
Enter key
Service Settings Menu*
Cancel key
Service Test Menu*
Auto key
Diagnostics Menu
Stop key
* Levels 2 and 3 of the Service Settings Menu and the Service Test Menu are protected by a
password and are reserved for Trane Service Engineers.
Figure 2 : Control panel mounted on a model RTWA unit
