TurboChef ENCORE Service Manual page 59

Fault Code Troubleshooting
From Test Mode, you can run oven diagnostics and check fault counts. To access Test Mode see page
19, or turn on Diagnostic mode see page 14, section "Demo Mode oN/oFF." To locate oven compo-
nents for testing, adjustment, or replacement, see the Appendix.
Do resistance measurements
between windings and
chassis agree with values on
motor windings resistance
table (below)?
No
replace blower motor.
Test for voltage on the J1 connector.
1. Ground pin 5 of the J1 connector.
2. While pin 5 is grounded, check the
J1-1 (red) terminal on the control
wiring plug for 0-10 VDC across pin
J1-1 and common (see page 48) while
incrementing the blower speed in test
mode.
Is DC voltage present throughout all speed
settings in test mode on the J1 connector?
To
black
black
red
black, red, or White
Motor Windings Resistance Table
Troubleshooting:
F1: blOWER (blower Running Status bad)
Is the blower motor
YES
spinning freely?
Is the Status Indicator
YES
"A" backlit in test
mode? (page 19)
replace the
bMSC.
YES
From
red
White
White
Green
No
No
YES
1. Disconnect control wiring (J1 connector).
2. Ground pin 5 of the J1 connector (Status
oK wire) to chassis to remove the back-
light from status indicator "A" (see "Test
Mode," page 19 for more details).
Was the back-light removed from status
indicator "A" 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.
Check the wire
harness and if nec-
essary, replace the
control board.
No
No
Expected Resistance
2.0-2.6 ohms
2.0-2.6 ohms
2.0-2.6 ohms
open
37