Turbochef-technologies TurboChef User Manual download pdf (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

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 93 94

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Turbochef-technologies TurboChef User Manual Page 62