Jenn-Air JMC2427IM Fiche Technique page 12

FOR SERVICE TECHNICIAN'S USE ONLY
FAILURE ERROR LIKELY FAILURE CONDITION
F4 E2 Magnetron Temperature Sensor Error
SUGGESTED CORRECTIVE ACTION PROCEDURE
NOTE: Before starting any test, cycle power to the oven (power Off, wait 10
seconds, and 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, and then verify that the
failure happens again.
1.
Unplug oven or disconnect power.
2.
Check that the P21 connection of the Microwave Appliance Manager is
firmly connected. If it is, go to Step 3. If it is not, reconnect and go to
Step 5.
Magnetron
Thermistor
3. Disconnect connector P21 from the Microwave Appliance Manager, and
measure the resistance of the thermistor. It should be (approximately)
10 kΩ at 77°F ± 10°F (25°C ± 10°C).
4. Check thermistor for short to ground. If check on thermistor is not
correct, replace the thermistor. If thermistor check is correct, replace the
Microwave Appliance Manager.
5. Reassemble all parts and panels before operating.
6.
Plug in oven or reconnect power.
7.
Verify operation is normal. Enter the Diagnostics Menu, select "Error
Diagnostics," and clear the history.
Microwave
Appliance
Manager
P21
FAILURE ERROR LIKELY FAILURE CONDITION
F4 Inputs E4 Microwave Oven Humidity Sensor Error
SUGGESTED CORRECTIVE ACTION PROCEDURE
NOTE: Before starting any test, cycle power to the oven (power Off, wait 10
seconds, and 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 that uses the humidity sensor, such as a
Steam cycle. Wait 1 minute, and then verify that the failure happens again.
1.
Unplug oven or disconnect power.
2.
Check that the P23 connection of the Microwave Appliance Manager is
firmly connected. If it is, go to Step 3. If it is not, reconnect and go to
Step 5.
Humidity
Sensor
1600
3. Disconnect connector P23 from Microwave Appliance Manager and
measure the resistance of the sensor:
Between pins 3 and 1. It should be approximately 2800 Ω at 77°F ± 10°F
(25°C ± 10°C).
Between pins 3 and 2. It should be approximately 2800 Ω at 77°F ± 10°F
(25°C ± 10°C).
4. Check sensor for short to ground. If checks on sensor are not correct,
replace the sensor. If sensor checks are correct, replace the Microwave
Appliance Manager.
5. Reassemble all parts and panels before operating.
6.
Plug in oven or reconnect power.
7. Verify operation is normal. Enter the Diagnostics Menu, select "Error
Diagnostics," and clear the history.
12
Microwave
Appliance
Manager
P23