Jenn-Air JJW2827IL Fiche Technique page 15

4.
Check for shorted relays. Disconnect PX1 and PX4 connectors and check
for shorts between:
a. PX1‑1 and PX1‑2 (Bake relay)
b. PX1‑3 and PX1‑4 (Convect relay)
c. PX4‑1 and PX4‑2 (Broil relay)
Upper Copernicus Appliance Manager
K11
PX4
K10
K2
PX1
K3
PX3
Lower Copernicus Appliance Manager
K11
PX4
K10
K2
PX1
K3
PX3
5.
If there is a shorted relay, replace the Copernicus Appliance Manager.
6. Go to Step 13.
N L2 L1
BU
Upper Broil - 4000W
1 BU BU
2
Upper Bake - 2800W
RD
RD
1 BK
2
3
YL YL
4 Upper Convect - 3200W
BK
RD RD
1
2
Upper Temperature Limiter
Oven Temp 338°F (170°C)
RD/WH
N L2 L1
BU
Lower Broil - 4000W
1 BU
BU
2
Lower Bake - 2800W
RD
RD
1 BK
2
3
YL YL
4
Lower Convect - 3200W
BK
RD RD
1
2
Lower Temperature Limiter
Oven Temp 338°F (170°C)
RD/WH
7.
If everything is correct, disconnect connector P3 from the Copernicus
Appliance Manager, and measure the resistance of the oven sensor. It
should be 1000 Ω to 1200 Ω at 77°F (25°C). Check sensor for short to
ground. If checks on sensor are not correct, replace the sensor and
repeat the checks.
Upper Oven
Temperature
Sensor
Lower Oven
Temperature
Sensor
8. Reassemble all parts and panels before operating.
9.
Plug in oven or reconnect power.
10. Enter the Diagnostics mode and select "Sensors & Switches" to verify
that the corresponding oven temperature displayed is correct (ambient
temperature).
NOTE: On the status screen, the unit of measurement is Celsius.
11. If it is not, unplug the oven or disconnect power.
12. Replace the Copernicus Appliance Manager board.
13. Reassemble all parts and panels before operating.
14. Plug in oven or reconnect power.
15. Verify operation is normal. Enter Diagnostics mode, select "Error
Diagnostics," and clear the history.
15
V
1
V
2
3
Upper Copernicus
4
5
Appliance Manager
6
7
8
9
10
P3
V
1
V
2
3
Lower Copernicus
4
5
Appliance Manager
6
7
8
9
10
P3