Head Assembly Doesn't Rotate Trroubleshooting Flow Chart - Wolf Wall Ovens Technical & Service Manual

Troubleshooting Guide
Wall Oven Head Assembly Doesn't Rotate Troubleshooting Flow Chart
WHEN PERFORMING CONTINUITY CHECKS, POWER TO THE UNIT MUST BE DISCONNECTED
Using a volt/ohm meter set to read AC voltage, at connector J1 on the Stepper Motor Control Board, place one meter probe to pin 1 and
one meter probe to pin 3.
Do you have 120 VAC ± 10%
from pin1 to pin 3?
Yes
Using a volt/ohm meter set to read ohms. Unplug the J5 connector at stepper motor control board. Check continuity of the switch,
with your ohm meter, while depressing the switch.
Do you have continuity
of switch?
Yes
Using a volt/ohm meter set to read DC voltage, at the J2 connector of the stepper motor control board, place one meter probe to
pin 1 and one meter probe to pin 2.
With the wires connected,
do you have 2 VDC
from pin 1 and pin 2 ?
Yes
With the wires disconnected,
do you have 5 VDC
from pin 1 and pin 2 ?
Yes
At the J4 connector of the stepper motor control board, check from pin 6 to any of the first four pins, while depressing the switch.
11 VDC present while cycling.
No
Replace the stepper motor.
Head Assembly Doesn't Rotate Troubleshooting Flow Chart
Do you have 120 VAC ± 10%
No
from L1 to N?
Yes
Unit has loose or defective wire(s) between L1 and
N of terminal block to J1 connector on stepper motor control board.
Repair/Replace wires.
No
Replace defective actuator switch
No
Replace oven controller
No
Replace oven controller
W W a a l l l l O O v v e e n n s s
Check for loose or defective wiring to unit
No
from terminal block to junction box/power
cord. May have to call an electrician
5-10