Trane S9V2B040U3PSC - Page 122

122
S9V2-SVX001-1B-EN
Is ~12VDC measured
from terminals 1 (12V)
and 3 (GND) at the
IFC?
NO
Replace IFC
Check opera!on
Is 120 VAC measured at
the line voltage connector
at the motor? (5 pin
connector terminals 4 and
5)
Correct, replace wiring.
Check opera!on
NO
YES
Remove the serial
motor wiring
harness at the IFC.
Apply 24 VAC to
wires 3 & 4.
Does motor run?
Replace motor.
Check opera!on
NO
Replace IFC. Check
opera!on
YES
See diagram #2 below
#4 = WHITE wire, connects to TX
#3 = BLACK wire, connects to GND
Serial Motor
Troubleshoo!ng
See diagram #1 below
DIAGRAM #1
DIAGRAM #2
TTrroouubblleesshhoooottiinngg