TROUBLESHOOTING
31
Fault Code Troubleshooting
From TEST MODE, you can test separate oven components to help diagnose an issue. To access TEST
MODE
, see page 16.
Troubleshooting:
F1:BLOWER FAULT (Blower Failure)
Access the TEST MODE.
(page 16)
Are the status indicators at
location 6 and 7 present
(pages 18-19)?
NO
YES
6
7
Open Left End
Bell.
Is a fault code
present on the
BMSC?
Open the Right
End Bell.
Is a fault code
present on the
BMSC?
CF, cF, F1, or GF fault: EPM module
is faulty. Replace BMSC (page A-8 =
lower, page A-12 = upper).
AF fault: Temperature is too high in
housing. Check cooling system (page
41).
Any other fault:
Call technical support.
YES
YES
NONO
Is the wiring connected properly?
Check the BMSC, blower motor, and
I/O control board.
Correct wiring
or replace I/O
control board,
BMSC, or
blower motor
if damaged
(page A-8 =
lower, A-12 =
upper).
YES
Check the I/O control
board, BMSC, and blower
motor wiring (page 45).
Is the blower motor
spinning freely?
NO
Remove obstruction or, if
necessary, replace blower
motor (page A-8 = lower,
A-12 = upper).
YES
Do resistance measurements
between windings and
chassis agree with values on
motor windings resistance
table (Figure 37)?
YES
Replace BMSC (page A-8 =
lower, A-12 = upper).
NO
Replace the
blower motor
(page A-8 =
lower, A-12 =
upper).
To From Description Expected Resistance
Blue Brown Winding (A-B) 5.1-5.5 W
Blue White Winding (A-C) 5.1-5.5 W
Brown White Winding (B-C) 5.1-5.5 W
Blue, Brown, or White Green Windings to chassis Open
Figure 37: Motor Windings Resistance Table
NO
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