Service Guide
For Service Technician Use Only
DIAGNOSTICS & TROUBLESHOOTING
Whirlpool
®
Smart Wall Ovens
n
2-7
Code Description Explanation and Recommended Procedure
F1E1 Internal Oven ACU
Error
NOTE: Before starng any test, cycle power to the oven (power o, wait 10 seconds, then power
on).
PROCEDURE: Before proceeding, verify the error code by entering the Diagnoscs Menu and
selecng “Error Diagnoscs”.
NOTE: If other error codes are stored, troubleshoot those other error codes rst.
1. Unplug the oven or disconnect power.
2. Replace Copernicus ACU.
3. Reassemble all parts and panels before operang.
4. Plug in the oven or reconnect power.
5. If error persists aer Copernicus ACU is replaced, unplug the oven or disconnect power, and
then go to Step 6. If not, go to Step 9.
6. Replace HMI-Central/UI board Control Panel Assembly.
7. Reassemble all parts and panels before operang.
8. Plug in the oven or reconnect power and follow the on-screen prompts for a model
selecon.
9. Verify operaon is normal. Enter Diagnoscs mode, select “Error Diagnoscs”, and clear the
history. If the HMI-Central/UI board Control Panel Assembly was replaced, there is no need
to clear the error history.
F1E4 Microwave Oven
Relay 4903 Error
NOTE: Before starng any test, cycle power to the oven (power o, wait 10 seconds, then power
on). Aer powering on, be sure that a load, such as a microwave-safe cup of water, is present in
the microwave oven cavity, and start a microwave cooking funcon. Wait
1 minute, then verify that the failure happens again.
1. Make sure that all interlock switches work properly: When door is open, microwave light is
on, when door is closed, microwave light is o.
2. Unplug the oven or disconnect power.
3. Check the following on the Microwave ACU:
a. Wire connecons to Relay 4903.
b. Check if Relay 4903 is shorted. If so, go to Step 7.
4. Reassemble all parts and panels before operang.
5. Plug in microwave oven or reconnect power.
6. To check if the error code is sll present, be sure that a load, such as a microwave-safe cup of
water, is present in the microwave oven cavity, and start a cooking funcon in the microwave
oven. Wait 1 minute to check if the error appears. If error remains, go to Step 7. If not, go to
Step 10.
7. Unplug microwave oven or disconnect power and replace the Microwave ACU.
8. Reassemble all parts and panels before operang.
9. Plug in the oven or reconnect power and follow the on-screen prompts for a model
selecon.
10. Verify operaon is normal. Enter Diagnoscs mode, select “Error Diagnoscs”, and clear the
history. If the HMI-Central/UI board Control Panel Assembly was replaced, there is no need
to clear the error history.
Line Fuse
20A
Primary
Switch
Interlock
Inverter
4903
1
Microwave Relay
4
BR
BU
CN702
L1