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FORM 155.35-ICOM2.EN.CE/GB (1018)
DATE: 10/30/2018
YHAU-CE CONTROL CENTER
The YHAU-CE Control Center, furnished as standard
on each chiller-heater, allows for efficiency, monitor-
ing, data recording, chiller-heater protection, and op-
erating ease. The Control Center is factory-mounted,
wired, and tested. It is used as a control system for
lithium bromide absorption chiller-heaters.
The panel is configured with a color TFT Display with
buttons that are integrated into the display.
The LCD display allows for a graphic animated dis-
play of the chiller-heater, its sub-systems and system
parameters. In addition, you may view the historical
operation of the chiller-heater as well as the present
operation. A Status Bar displays the system status in-
formation.
The panel display is available in various languages.
The language can be changed without having to turn
off the chiller-heater.
Data can be displayed in Metric units plus keypad en-
try of set points to 0.1 increments.
Security access using passwords is provided to prevent
unauthorized changes of set points. There are three lev-
els of access. Each level has its own password. There
are certain screens, displayed values, programmable
set points, and manual controls not shown that are used
to service the chiller-heater.
JOHNSON CONTROLS
SECTION 6 – OPERATION
COMMON ITEMS
The Control Panel screens have items that are applica-
ble to each feature of the Control Center. This includes
the following common items:
• LOCAL and REMOTE: Buttons allow you to
• Operating Status: The bar appears at the center
• Failure and Alarm: Warning lamps that light if
• Date and Time: Shown on the upper right corner
The five (5) buttons along the bottom of the Main
screen are common to the other screens in the Control
Panel. They can be used to move around and access
other screen information. They are:
• MAIN: return to the initial screen
• DATA: move to the Data screen
• FAILURE: move to the Failure screen
• ALARM: move to the Alarm screen
• SETTING: move to the Setting screen
LD26791
Buttons are listed in the order they are
seen on the screen: left to right and top
to bottom.
switch the operating location between remote and
local. The change may be made while the chiller-
heater is operating. Press and hold the appropriate
button for 2 sec. to make the change.
top of the screen. It displays the following: Stop,
Operating, and Failure Activating. It also shows if
the unit is in cooling or heating mode.
the chiller-heater has a failure or a warning alarm.
of each screen.
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Troubleshooting
