TurboChef Technologies TurboChef - Manual (Page 62)

ISSUE RESOLUTION
F1: Blower Running
Status Bad
1. Verify motor spins freely.
†
Motor seized: Unplug oven and correct obstruction or replace motor.
†
Motor spins freely: Verify motor windings (see table below).
2. Verify motor windings are OK. Measure the resistance between
windings and chassis. Unplug oven and replace motor if resistances do
not agree with the values in the table below. If motor is OK, proceed to
step 3, below.
3. Determine if status indicator “A” is highlighted/backlit in
TEST MODE
.
†
“A” is highlighted/backlit.
a. Disconnect control wiring.
b. Ground OR-9 to chassis to remove backlight on “A”.
c. Keeping OR-9 grounded, check terminals on the control wiring
plug for 0-10 VDC control voltage (reference drawing of QC3
plug on schematics (pages 55-63) while incrementing blower
speed in
TEST MODE
(see
BLOWER SPEED
, page 15).
d. If DC voltage is present throughout all speed settings in
TEST
MODE
(see
BLOWER SPEED
, page 15), replace motor controller. If
not, check harness and/or replace I/O board.
MOTOR WINDING RESISTANCES TABLE
TO FROM DESCRIPTION EXPECTED RESISTANCE
Black Red Winding (A-B) 2.0 – 2.6 Ohms
Black White Winding (A-C) 2.0 – 2.6 Ohms
Red White Winding (B-C) 2.0 – 2.6 Ohms
Black, White
or Red
Green Windings to Chassis Open
THE CONVECTION CIRCUIT 50