Product specifications

ManualsBrandsAmerican Standard ManualsHousehold AppliancesACONT900AC43UA

ACONT900AC43UA

Pub. No. 11-HD04D1-2

69-2080—05 16

LED Indication

An LED indicator is located in the upper right corner of the

Comfort Control. It is only visible when lighted:

• It indicates that there is an Alert.

• It indicates that the Comfort Control is in Discovery

mode.

LED Indication

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:

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 represents 24 hours

of 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). See Owner’s Guide for more detailed

information.

Pre-programmed

Table 5 shows the Energy Star default program settings.

See Owner’s Guide for complete instructions on changing

the program.

Alert Code Numbers

The Comfort Control can receive Alert codes from any

communicating equipment via the AccuLink

bus. The

Comfort Control will illuminate the Red “Service” LED and

toggle between the main screen and a screen showing

the Alert code number. When multiple Alert codes exist

simultaneously, the display will cycle through each code

(showing a maximum of the 5 most recent Alerts) and

return to the main screen. See the Alert Code Addendum

(form 18-HD32D2-1/69-2009) for a listing of all equipment

Alert codes.

Equipment Damage Hazard. Minimum

compressor off-time is bypassed during Installer

System Test.

Avoid cycling compressor quickly. Observe compressor

protection period.

System Checkout

Installer System Test

The Installer System Test mode is used to test the

Comfort Control operation with HVAC equipment. See

Table 7. System configuration determines which tests are

available and the number of stages shown. While in

System Test mode, the minimum off time is bypassed.

The Installer Test is part of the Installer Setup options.

Enter Installer Setup screen and press the Down arrow

key for quick access to the test selection(s).

NOTE: Changing tests will turn equipment off.

NOTE: Entering Installer Setup will turn equipment off.

NOTE: NOTE: Charge Assist

mode not available dur-

ing Installer System Tests.

NOTE: Test modes time out after 5 minutes.

Table 5. Energy Star Default Program Settings

Period Time

Heat

Setpoint

Cool

Setpoint

Fan

Setting

Wake 6:00 AM 70°F (21°C) 78°F (25.5°C) Auto

Leave 8:00 AM 62°F (16.5°C) 85°F (29.5°C) Auto

Return 6:00 PM 70°F (21°C) 78°F (25.5°C) Auto

Sleep 10:00 PM 62°F (16.5°C) 82°F (28°C) Auto

Table 6. Installer System Tests

Selection

Installer Setup

Number

Factory

Setting

Choices

Comments

Option Description

Installer Test Cool Test 1 0 0, 1, 2, 3 0 - Cool is off

1 - Cool stage 1

2 - Cool stage 1, 2

3 - Cool stage 1, 2, 3

Not shown if ISU 0172 is

set to 3 or if ISU0174 is

set to 0.

If Discharge Air

Temperature Sensor is

available, Press the More

key to show the

Discharge Air

Temperature value.

Installer Test Fan Test 2 0 0, 1 0 - Fan is off

1 - Fan on