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 starng 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 Diagnoscs Menu and
selecng “Error Diagnoscs”.
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 operang.
4. Plug in the oven or reconnect power.
5. If error persists aer 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 operang.
8. Plug in the oven or reconnect power and follow the on-screen prompts for a model
selecon.
9. Verify operaon is normal. Enter Diagnoscs mode, select “Error Diagnoscs”, 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 starng any test, cycle power to the oven (power o, wait 10 seconds, then power
on). Aer 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 funcon. 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 connecons to Relay 4903.
b. Check if Relay 4903 is shorted. If so, go to Step 7.
4. Reassemble all parts and panels before operang.
5. Plug in microwave oven or reconnect power.
6. To check if the error code is sll 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 funcon 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 operang.
9. Plug in the oven or reconnect power and follow the on-screen prompts for a model
selecon.
10. Verify operaon is normal. Enter Diagnoscs mode, select “Error Diagnoscs”, 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