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American Standard AUD2B060AFV32A Installer's Manual Page 29

Variable speed, 2-stage, 80% upflow/horizontal gas-fired furnaces, fan assisted combustion system with whole house air cleaner.
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FAULT CODE RECOVERY
On power up, last 4 Faults, if any, will be flashed on the
Red LED. The newest Fault detected will flash first and
the oldest last. There will be a 2 second delay between
Fault Code flashes. Solid Red LED error codes will not
be displayed.
The Green LED will be on solid during last Fault Re-
covery. At any other time the control is powered, the
Green LED indicator light will operate as shown in
Table 13 and the Red LED will flash LitePort data (one
flash) every 20 seconds.
INTEGRATED FURNACE CONTROL
GREEN "STATUS" LED FLASH CODES
Flashing Slow ---
Flashing Fast ---
Fault Code Reset
The last 4 Fault Codes can be erased from memory by
powering up the control with "G" energized and then ap-
plying "R" to the "W1" terminal 3 times within 6 sec-
onds. The control will acknowledge the reset by turning
on the Red LED for 2 seconds.
High Voltage switch
9.6 to 8.0 KVDC
9.6 KVDC is top down |\
8.0 KVDC is bottom down |/
LED
Figure 22
18-CD24D1-2
TABLE 13
Normal - No call for Heat
Normal - Call for Heat
Figure 21
*UX2/ DX2 Integrated Furnace Control
Red LitePort
Green Status LED
NOTE: In normal operation, the furnace makes a slight
sound as the air passes through and is cleaned. In
some applications, you may notice this sound coming
from the return air vent(s). If desired, this sound level
can be reduced with minimal impact on air cleaning ef-
ficiency by reducing the power setting of the FIELD
CHARGER. The unit is shipped with the power set at
9.6KV (high). If sound is heard, reduce power level to
8.0KV (low) at the switch on the power supply. See Fig-
ure 22.
Return from air cleaner
Green
High voltage power lead
24 VAC Common
Blue
Installer's Guide
TM
LED
Pink
24 VAC Hot
Red
29

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