Service Guide
For Service Technician Use Only
DIAGNOSTICS & TROUBLESHOOTING
2-8
n
Whirlpool
®
Smart Wall Ovens
Code Description Explanation and Recommended Procedure
F1E5 Microwave Oven
Inverter 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 works properly: when door is open, microwave light is
on, and door is closed, microwave light is o.
2. Unplug microwave oven or disconnect power.
3. Check the following on the Microwave ACU:
a. Relay 4903
b. Connector P8
4. Check the following connecons on the Inverter board:
a. CN701
b. CN702
c. CN703
5. If the door works properly and all connecons are okay, replace the Microwave Inverter
Board.
6. Reassemble all parts and panels before operang.
7. Plug in microwave oven or reconnect power.
8. 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, then go to Step 9. If not,
go to Step 17.
9. Unplug the oven or disconnect power.
10. Replace the Magnetron.
11. Reassemble all parts and panels before operang.
12. Plug in microwave oven or reconnect power.
13. 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, then go to Step 14. If not,
go to Step 17.
14. Unplug microwave oven or disconnect power and replace the Microwave ACU.
15. Reassemble all parts and panels before operang.
16. Plug in the oven or reconnect power and follow the on-screen prompts for a model
selecon.
17. 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.
Magnetron
MW Inverter
PWM
To
MW
Relay
4903
P8
WH
P354
BU
CN701
E701
1
2
3
CN703
CN702
RD RD
YL/
GN
3
2
1
P355