Tech Sheet

7
Failure/Error Display Codes
No Display - control is blank
Switch Mode Power Supply (SMPS), User
Interface (UI)
SUGGESTED CORRECTIVE ACTION PROCEDURE
NOTE: Before starting any test, cycle power to the oven(power off, wait 10
seconds, and power on).
1. Unplug oven or disconnect power.
2. Remove plastic cover from UI. Check connection from display to UI.
3. Check wiring from main line to SMPS (CONN 7).
4. Check connection from wiring harness to UI (J15).
5. Check proper voltage input at J15-2 (GND) to J15-4 (14 VDC) on the UI
by completing the following steps.
6. Connect voltage measurement equipment to J15-2 and J15-4 on UI.
7. Plug in oven or reconnect power.
8. Measure voltage and conrm voltage reading is 14VDC. If voltage is
correct, unplug oven or disconnect power and go to Step 13. If voltage
isnotcorrect, go to Step 9.
9. Unplug oven or disconnect power. Replace theSMPS.
10. Reassemble all parts and panels before operating.
11. Plug in oven or reconnect power.
12. Check for control board display. If still no display, unplug oven or
disconnect power.
13. Replace HMI-Central/UI board.
14. Reassemble all parts and panels before operating.
15. Plug in oven or reconnect power. If the UI was replaced, follow the on-
screen prompts to select themodel number.
16. Verify operation is normal. If problem persists, replacethe Control Panel
Assembly and repeat steps14 through 16.
NL
2L1
P1
12345
WH
BK
BU
BR
YL
Oven
Appliance
Manager
User Interface
Microwave
Appliance
Manager
P26
OR
12345
1234
1
2
1
1
3
2
2
4
5
6
1
3
2
4
WH
P1
J8
BK
YL
BR
OR
J5
J15
J7 HMI RightHMI Left J4
J6
SMPS
14 V DC
15W
CONN2
CONN7
BK
WH
OR
YL
OR
52 BU
Cavity
Thermostat
42 WH
Line
20A Fuse
P34
41 WH
Line
Filter
P33
L1
P31
P32
Control Panel Assembly