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| ComPak
®
Series - Installation, Operation and Maintenance
SECTION V: OPERATION
CPCS-PCP Configuration
Figure 5-1. RIU Keypad
CPCS-PCP Remote Interface Unit
The CPCS-PCP Remote Interface Unit (RIU) is designed around the Carel pGD0, 4-line x 20 character, backlit,
LCD display module. The RIU displays are accessed through six backlit selection buttons. They consist of a
Return/ Enter Key, Up Key, Down Key, Program Key, Alarm Key, and Escape Key, as shown above.
After application of power to the ComPak® Control System, a “self-test, please wait…” image will appear for
approximately 3 to 5 seconds followed by an initial startup screen as shown below.
Figure 5-2. Initial Startup Screen
After approximately 5 minutes, the RIU will display the status screen rotation. Press the Escape key to bypass the
five minute delay and move directly to the status display.
Status Display
The status screens contain basic information about operation of the ComPak® system. Press the up or down
arrow keys to move from screen to screen. The screens will also rotate automatically every 10 seconds.
Figure 5-3. Status Screen 1
Status Screen 1 displays:
• Space Temperature in °F or °C
• Space Relative Humidity in %
• Space Dew Point in °F or °C
• Outside Air Temperature in °F or °C (with Economizer Option Only)
