Operation: Using The Comfort Control; System And Fan Settings; Fan Settings; Led Indication - Trane ACONT900AC43UA Service Manual

(A/T)CONT900AC43UA Installer Guide

Operation: Using the Comfort Control

System and fan settings

The system default setting is Heat, unless no Heat
stage is discovered/configured. The fan default is
Auto.
System settings
Heat: Controls heating system.
Off: Heating and cooling are off.
Cool: Controls cooling system.
Auto: Automatically changes between heating and
cooling systems, depending on indoor temperature
(See Installer Setup section.)
Em. Heat: Compressor is locked out and auxiliary
heat cycles to maintain temperature (used only for
heat pump systems with backup heat.) Maximum
allowable emergency heat stages is three.

Fan settings

Pressing the fan key selects whether the indoor fan
motor runs in the On, Automatic, or Circulation mode.
The fan setting can be programmed into the Com-
fort Control schedule for each period (wake, leave,
return, sleep.)
On: Fan runs continuously.
Auto: Fan run is automatically following the fan sched-
ule.
Circ: Circulation control will provide a variable circu-
lation determined by the Adaptive Intelligent Circu-
lation (AIC) algorithm running the fan between 20%
and 60% of the time.

LED indication

An LED indicator is located in the upper right corner
of the Comfort Control. It is only visible when illumi-
nated.
• It indicates that there is an Alert.
C - A 18
Communicating Programmable 3-Wire Hookup
• It indicates that the Comfort Control is in Dis-
covery mode.

Filter indication

The Comfort Control can track up to two filter timers
by total fan run time or calendar days. This feature
can be used to tell the homeowner when to replace
the furnace filter or clean the Air Cleaner cells:
TCONT900AC43UA Installer's Guide
Select filter timer reset time:
Total fan run time: The number of run time days for
the filter timer to count down from: 0, 10, 30, 60, 90,
120, 180, 270, or 365 days (one run time day repre-
sents 24 hours or continuous fan/system run time.)
Calendar days: The number of days for the filter timer
to count down from: 0, 30, 60, 90, 120, 180, or 365
days. To activate this feature, select a value other
than 0 (disabled.)

Pre-programmed

Table 5 shows the Energy Star default program set-
tings. See owner's guide for complete instructions
on changing the program (See Table 5.)
Table 5
Table 5. Energy Star Default Program Settings.

Alert code numbers

The Comfort Control can receive Alert codes from
any communicating equipment's buss. The Comfort
Control will illuminate the Red "Service" LED and
4 Heat/3 Cool/ Heat Pump