4
would scroll through the modes and sub-modes using the
and keys. The arrow symbol in the path name represents
pressing to move into the next level of the menu
structure.
When a value is included as part of the path name, it will be
shown at the end of the path name after an equals sign. If the
value represents a configuration setting, an explanation will be
shown in parentheses after the value. As an example, Configu-
ration
IAQ
AQ.CF
IQ.AC = 1 (IAQ Analog Input).
Pressing the and keys simultaneously at
any time will display an expanded text description of the four-
character point name. The expanded description is shown in
the local display tables (Appendix A).
The CCN point names are also referenced in the local display
tables for users configuring the unit with CCN software instead
of the local display. The CCN tables are located in Appendix B
of this manual.
BASIC CONTROL USAGE
ComfortLink Controls
The ComfortLink control system is a comprehensive unit-man-
agement system. The control system is easy to access, config-
ure, diagnose and troubleshoot.
The control is flexible, providing two types of constant volume
cooling control sequences, two variable air volume cooling con-
trol sequences, and heating control sequences for two-stage elec-
tric and gas systems, and for multiple-stage gas heating, in both
occupied and unoccupied schedule modes. This control also
manages:
• VAV duct pressure (through optional VFD), with reset
• Building pressure through two different power exhaust
schemes
• Condenser fan cycling for mild ambient head pressure control
• Space ventilation control, in occupied and unoccupied pe-
riods, using CO
2
sensors or external signals, with ventila-
tion defined by damper position
• Smoke control functions
• Occupancy schedules
• Occupancy or start/stop sequences based on third party
signals
• Alarm status and history and run time data
• Management of a complete unit service test sequence
• Dehumidification (with optional reheat) and humidifier
sequences
System diagnostics are enhanced by the use of multiple exter-
nal sensors for air temperatures, air pressures, refrigerant
temperatures, and refrigerant pressures. Unit-mounted actua-
tors provide digital feedback data to the unit control.
The ComfortLink control system is fully communicating and ca-
ble-ready for connection to the Carrier Comfort Network
®
(CCN) building management system. The control provides high-
speed communications for remote monitoring via the Internet.
Multiple units can be linked together (and to other ComfortLink
control equipped units) using a 3-wire communication bus.
The ComfortLink control system is easy to access through the
use of a unit-mounted display module. There is no need to
bring a separate computer to this unit for start-up. Access to
control menus is simplified by the ability to quickly select from
11 menus. A scrolling readout provides detailed explanations
of control information. Only four, large, easy-to-use buttons
are required to maneuver through the entire controls menu.
For added service flexibility, an accessory hand-held Navigator
module is also available. This portable device has an extended
communication cable that can be plugged into the unit’s commu-
nication network either at the main control box or at the opposite
end of the unit, at a remote modular plug. The Navigator display
provides the same menu structure, control access and display data
as is available at the unit-mounted scrolling marquee display.
Scrolling Marquee
This device is the standard interface used to access the control
information, read sensor values, and test the unit. The scrolling
marquee is located in the main control box. The scrolling mar-
quee display is a 4-key, 4-character LED (light-emitting diode)
display module. The display also contains an Alarm Status LED.
See Fig. 1. The display is easy to operate using 4 buttons and a
group of 11 LEDs that indicate the following menu structures,
referred to as modes (see Appendix A):
• Run Status
• Service Test
• Temperatures
• Pressures
• Setpoints
• Inputs
• Outputs
• Configuration
• Time Clock
• Operating Modes
•Alarms
Through the scrolling marquee, the user can access all of the
inputs and outputs to check on their values and status, config-
ure operating parameters plus evaluate the current decision sta-
tus for operating modes. Because the A Series units are
equipped with suction pressure and saturated condensing tem-
perature transducers, the scrolling marquee can also display re-
frigerant circuit pressures typically obtained from service gag-
es. The control also includes an alarm history which can be ac-
cessed from the display. In addition, through the scrolling
marquee, the user can access a built-in test routine that can be
used at start-up commissioning to diagnose operational
problems with the unit.
Accessory Navigator™ Display
The accessory hand-held Navigator display can be used with
the A Series units. See Fig. 2. The Navigator display operates
the same way as the scrolling marquee device. The Navigator
display is plugged into the RJ-14 (LEN) jack in the main con-
trol box on the COMM board. The Navigator display can also
be plugged into the RJ-14 jack located on the ECB (economiz-
er control board) located in the auxiliary control box.
Fig. 1 — Scrolling Marquee
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
Alarm Status
ENTER
MODE
ESCAPE
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