TROUBLESHOOTING
35
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 16.
For information and illustrations on replacing compo-
nents, see the appendix.
Fault Code Descriptions
To view the fault log:
1. When the oven is off or cooling down, press the
INFO key.
2. Press the R3 soft key to view the fault counters.
3. To view a detailed log 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 (see page 16). 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 suc-
cessful, 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 or more 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 16).
NOTE: The F2 alarm can be turned off to prevent
the cook cycle from being interrupted. See page 14 for
details.
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 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: See the oven schematic, page 49. 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 thermo-
stat 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.
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