Overview of Troubleshooting
This section contains information on the following:
-Fault code descriptions
-Fault code troubleshooting
-
For information on accessing TEST MODE, see page
15.For information and illustrations on replacing components, see the appendix.
Fault Code Descriptions
For instructions on viewing the fault counter, see page 13.
F1: Blower Running Status Bad
This fault is displayed when the motor controller indicates no running status.
The motors and motor controller are monitored continuously in all modes with special handling in the TEST MODE (see page 15). If a fault is detected, the control will terminate a cook cycle and display “F1: Blower.”
Upon turning on the oven, the control will attempt to restart the motors. If the restart of both motors is successful, the fault code will be cleared from the display. The fault is also cleared from the display at the onset of cooking or when a blower motor is tested in TEST MODE.
F2: Cook Temperature Low
This fault is displayed if the cook cavity temperature is more than 84ºF (47ºC) below the set temperature after five seconds into a cook cycle.
The fault is cleared from the display at the onset of cooking if the cook cavity temperature is within
84ºF (47ºC) of the set temperature or when the heater is tested in TEST MODE (see page 15).
F3: Magnetron Current Low
This fault is displayed when the current transformer (CT) on the I/O control board detects less than 10 amps. The fault is monitored when the microwave is on during a cook cycle or in TEST
MODE.
The fault is cleared from the display at the onset of a cook cycle if the CT detects 10 amps or when the magnetrons are successfully energized in TEST
MODE.
F4: Door Monitor Defective
This fault is displayed when the control detects that the monitor interlock switch unlatches before the primary or secondary interlock switches. In addition, this fault will blow the F3 and F4 fuse if the microwave high voltage system is energized when the fault occurs. The fault is cleared from the display when the oven is powered off and then back on.
NOTE: Door interlock switches are in parallel. See the oven schematic, page 51. The fault is monitored during a cook cycle and in TEST MODE when the microwave is on.
F5: Magnetron Over Temperature
This fault is displayed when either magnetron thermostat reaches 212ºF (100ºC).
The thermostats will reset automatically, and are wired in series. The fault is cleared from the display at the onset of a cook cycle if the thermostat is closed or when the magnetrons are successfully tested in TEST MODE.
F6: Electrical Compartment Temperature High
This fault is displayed when the EC thermocouple exceeds 158ºF (70ºC). The EC temperature is monitored once per minute.
The fault is cleared from the display if on the next check, the EC thermocouple temperature is below the indicated limit.
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TROUBLESHOOTING
