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TROUBLESHOOTING
37
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
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 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 (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 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 or when the magnetrons are
successfully tested in
TEST MODE.
F6: Electrical Compartment Temperature High
This fault is displayed when the EC thermocouple
exceeds 158
º
F (70
º
C). 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.