Trane *UH2D120A9V5VA - Filter Rack Installation; Bottom Return Filter Rack Installation; Side Return Filter Rack Installation

12
Service Facts
X343070P08
To Pin #12
To Pin #15
To Pin #1 & #3
24 V.A.C.
#9 PIN WIRE IS ORANGE
#1 PIN WIRE IS BLUE
These service procedures will work on ECM-2
TM
motors and their motor
control board and their 16 Wire Low Voltage Control Cable.
Jumper
Q uick C heck M otor W ill N ot R un
ECM -2
TM
QUICK CHECK
B lower M otor W ill N ot R un
1. J umper 24 V olt A.C. "R" T erminal to "G" terminal on the
L ow V oltage T erminal board .
D
oes motor run ?
NO:
Go to step #2.
YES: Motor runs,
check Comfort Control
and Comfort Control wire.
2. U nplug 16 wire low voltage harness from the interface board .
J
umper 24 V olts A.C. to pins #12, #15 and common pins #1 and #3.
D
oes the motor run ?
NO:
Go to step #3.
YES: Replace the
variable speed
interface board
on the furnace.