TROUBLESHOOTING
33
Fault Code Troubleshooting
From Test Mode, you can run oven diagnostics and check fault counts. To access Test Mode or turn on
D
iagnostic mode, see page 13. To locate oven components for testing, adjustment, or replacement, see
the A
ppendix.
Troubleshooting:
F1: BLOWER (Blower Running Status Bad)
YES
YES
NO
Figure 37: Motor Windings Resistance Table
Replace blower motor(s).
Remove obstruc-
tion or if necessary,
r
eplace blower
motor(s).
YES
D
o resistance measurements
betw
een windings and
chassis agr
ee with values on
motor windings r
esistance
table (belo
w)? (Be sure to
check both the top and
bottom blo
wer motors.)
I
s each blower motor
spinning freely?
NO
Are Status Indicators
“B” and “T” backlit in
TEST MODE? (page 13)
NO
Replace the
BMSC.
T
o
F
rom
D
escription
Expec
ted Resistance
Black Red Winding (A-B) 5.9-7.3 Ohms
B
lack
White W
inding (A-C)
5.9-7.3 O
hms
Red White Winding (B-C) 5.9-7.3 Ohms
Black, Red, or White Green Windings to Chassis Open
NO
YES
1. Disconnect control wiring (top blower =
J2, bottom = J1 connector).
2. Ground pin 5 of the J1 and J2 connectors
(Status OK wire) to chassis to remove the
back-light from status indicators “B” and
“T”(see page 45).
W
ere the back-lights removed from the
status indicators while pin 5 was gr
ounded?
Check the wir
e
harness and if nec
-
essar
y, replace the
control board.
NO
YES
Test for voltage on the J1 and J2 connector.
1. Ground pin 5 of the J1 connector.
2. While pin 5 is grounded, check the
terminals on the control wiring plug
for 0-10 VDC across pins 1 and 2 of
the J1 connector (see page 45) while
incr
ementing the blo
wer speed in TEST
MODE.
3. Repeat steps 1 and 2 for the J2
connector
.
Is DC voltage present throughout all speed
settings in TEST MODE on both the J1 and J2
connectors?
To Next Page
Loading...
