Whirlpool WOC75EC7H, Service Manual

Page: 26 / 84

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 starting any test, cycle power to the oven (power off, wait 10 seconds, then power
on). After 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 function. 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 off.
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 connections on the Inverter board:
a. CN701
b. CN702
c. CN703
5.
If the door works properly and all connections are okay, replace the Microwave Inverter
Board.
6. Reassemble all parts and panels before operating.
7.
Plug in microwave oven or reconnect power.
8. To check if the error code is still 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 function 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 operating.
12. Plug in microwave oven or reconnect power.
13.
To check if the error code is still 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 function 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 operating.
16. Plug in the oven or reconnect power and follow the on-screen prompts for a model
selection.
17.
Verify operation is normal. Enter Diagnostics mode, select “Error Diagnostics”, 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
12
3
CN703
CN702
RD RD
YL/
GN
32
1
P355