American Standard *UD Series Operation Manual page 24

ECM TM 2 Variable Speed Furnace Motor Quick Check
5. Plug the 16 wire low voltage harness from the
motor back into the motor control board. Jumper
"G IN" pin to "G OUT" pin of the White-Rodgers
Integrated Control which plugs into the low voltage
motor control board.
Does the motor run?
Yes: Replace White-Rodgers Integrated Control.
JUMPER TO W/R PINS
"G" IN & "G" OUT
G
W1 W2 IN OUT
No: Move the jumper to the metal part
of the low voltage motor control
board plug.
Does the motor run?
Yes: White-Rodgers Integrated Control
pins not making contact with motor
control board plugs. Clean pins
and plug by unplugging and plug-
ging motor control board onto the
pins of the integrated control or
replace both if necessary.
No: Repair or replace the motor control
board.
NOT USED
R G W2 B
OUT CFM OUT
JUMPER FROM
STEP # 1
G R
W1 W2 IN OUT
23
NOT USED
G W2 B
OUT CFM OUT