Wolf SUB-ZERO MC24 Service Manual page 23

MC24
PROCEDURE
LETTER
(1) Disconnect oven from power supply and remove outer case.
(2) Discharge the high voltage capacitor.
(3) Disconnect the wire leads from the cook relay.
(4) Disconnect the sensor connector that is mounted to lower portion of control panel.
(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6) Reconnect the oven to the power supply and check the sensor cook operation proceed as follows:
6-1. Touch "BAKED POTATO" then "START".
6-2. Touch Start pad. The control panel is in the sensor cooking operation.
6-3. After approximately 20 seconds, push plunger of select switch for more than 3 seconds. This
6-4. After approximately 3 seconds, the display shows " X X . X X " which is the remaining cooking
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
TEST PROCEDURES
condition is same as judgement by AH sensor.
time, and the display count down.
To connector (F)
on Control Unit.
F-1
F-2
F-3
CONNECTOR
Sensor Dummy Resistor Circuit
COMPONENT TEST
CHECKING CONTROL UNIT
R1,R2 : 22Ω ± 1% 1/2W
R3 : 4.3kΩ ± 5% 1/4W
R4 : 1MΩ ± 5% 1/4W
1
2
R1
3
R3 R4
R2
24
Plunger
NC
NO
COM
NO
COM
NC