TurboChef sota Service Manual page 87

Fault Code Troubleshooting
From Test Mode, you can run oven diagnostics and check fault counts. To access Test Mode or turn
on Diagnostic mode, see page 14, 29 for Touch. To locate oven components for testing, adjustment, or
replacement, see the Appendix.
Do resistance measurements
between windings and
chassis agree with values on
motor windings resistance
table (below)? (Be sure to
check both the top and
bottom blower motors.)
NO
Replace blower motor(s).
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 79) while
incrementing the blower 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
Black
Black
Red
Black, Red, or White
Figure 40: Motor Windings Resistance Table
Troubleshooting:
F1: BLOWER (Blower Running Status Bad)
Is each blower motor
YES
spinning freely?
Are Status Indicators
"B" and "T" backlit in
YES
test mode? (page 14,
29 for Touch)
Replace the
BMSC.
YES
From
Red
White
White
Green
NO
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 79).
Were the back-lights removed from the
status indicators while pin 5 was grounded?
YES
Description
Winding (A-B)
Winding (A-C)
Winding (B-C)
Windings to Chassis
Remove obstruc-
tion or if necessary,
replace blower
motor(s).
Check the wire har-
ness and if necessary,
replace the SAGE
control board.
NO
NO
Expected Resistance
5.9-7.3 Ohms
5.9-7.3 Ohms
5.9-7.3 Ohms
Open
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