43
13 - TROUBLE SHOOTING
Disconn
ect 4-wire ha
rness
from
Combustion Air Blower.
Does
Combustion Air Blower
sp
eed increase?
_ _ _ _
_
Lockout Alarm A 0 8
Fan e
rror
Is Co
mbustion Air Blower
ope
ra
tin
g
?
YE
S
NO
Are
3
-wire
a
nd
4-wire
harne
sses co
nnected to
Combustion Air Blower?
Disconn
ect ha
rne
s
s from
Control M
odule J9.
M
easure
vo
lta
g
e be
twee
n J9
-2 an
d J9
-3.
Is voltag
e 120
Va
c ± 10
%
Disconn
ect 3-wire ha
rne
s
s
from
Combustion Air Blower.
Me
asure co
ntinuity in ea
ch
wire.
Cont
inuity in each
wire?
Rep
la
ce harn
ess
Conne
ct ha
rnes
s
Re
place
Combus
tion
Air Blow
er
Disconn
ect ha
rne
s
s from
Control Module J9. Continuity
in ea
ch
wire
o
f 4-wire ha
rne
s
s
(yellow, red, white,
black)?
Replace Control
Module
Rep
la
ce harn
ess
NO
NO
NO
NO
YE
S
YE
S
YE
S
YE
S
YE
S
NO
Replace Control
Module
Re
place
Combus
tion
Air Blow
er
Summary of Contents for 075 97gb
Page 56: ...56 14 WIRING DIAGRAM 14 1 Connection Diagram ...
Page 57: ...57 14 WIRING DIAGRAM 14 2 Schematic Diagram of Ladder Form ...
Page 73: ...73 ...
Page 74: ...74 ...
Page 75: ...75 ...