TROUBLESHOOTING
31
Overview of Troubleshooting
This section contains information on the
following:
- Fault code descriptions
- Fault code troubleshooting
- Non-fault code troubleshooting
For information on accessing Test Mode, see page
14. For information and illustrations on replacing
components, see the appendix.
Fault Code Descriptions
To view the fault log:
1. While the oven is cooling down or off, press
the INFO key to access the Info Mode.
2. From Screen 1 of the Info Mode (Figure 12,
page 11), press the R3 soft key to view the
fault log.
3. To view time stamps of each fault occurrence,
press the soft key adjacent to the fault code.
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 (page 14). 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 84
º
F (47
º
C) 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
84
º
F (47
º
C) of the set temperature or when the
heater is tested in Test Mode (page 14).
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 addi-
tion, this fault will blow the F3 fuse if the micro-
wave 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 45. 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 ther-
mostat reaches 212
º
F (100
º
C).
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.
NOTE: The Single Mgnetron Sota uses only one
magnetron thermostat.
F6: Electrical Compartment Temperature High
This fault is displayed when the EC thermocouple
exceeds 158
º
F (70
º
C). The EC temperature is mon-
itored once per minute.
The fault is cleared from the display if on the next
check, the EC thermocouple temperature is below
158
º
F (70
º
C).
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