9
The NGC (Tornado) oven has the ability to continually
monitor and log various fault conditions. Some fault
conditions will terminate Cook Cycles, while others
will not. Please refer to the Fault Code Table on
page 10 for more detailed information.
When a fault is detected, the Fault Code Counter
will increment. However, if the fault is subsequently
cleared by some action, whether service related or
not, the Fault Code Counter will not decrement.
TO VIEW FAULT CODES
To view the Fault Log, press the “4” and “6” Keys
simultaneously while the oven is in the Off State.
The oven will display all faults logged. Figure 3.
Each Fault Log will log up 255 instances before
rolling back to zero. Press the “0” Key to reset the
Fault Code Counter.
: The Fault Log also displays the Cook
Counter, which will log up to 65,535 Cook Cycles.
In order for the Control to log a Cook Cycle, the
oven must complete the first Event of any given
Recipe. If a Recipe only has one (1) Event, the oven
must complete the entire Cook Cycle in order to
count the Cook Cycle.
F
A
UL
T CODE DEFINITIONS
F1: Blower Running Status Bad
Fault is displayed when the Blower Controller
indicates no running status.
The Motor and Motor Controller state is monitored
continuously in all M
odes with special handling in
the Self-Test and Test Mode. If a fault is detected,
the Control will bounce the oven into the Off State.
Upon turning the oven On, the Control will attempt
to restart the M
otor
. I
f the r
estar
t is successful the
fault indication will be cleared. The fault is also
cleared at the onset of cooking or when the blower
is tested in the
T
est Mode.
F2: Cook Temperature Low
Fault is displayed if the Cook Chamber Temperature
is more than 84
º
F below the Set Temperature after
five (5) seconds into a Cook Cycle.
The fault is cleared at the onset of cooking if the
Cook Chamber Temperature is within 84
º
F of the
Set Temperature or when the heater is tested in the
Test Mode.
F3: Magnetron Current Low
Fault is displayed when the Current Transformer
(CT) on the I/O Control Board does not detect
enough current. The Fault is monitored when the
microwave is on during a Cook Cycle or Self-Test.
The fault is cleared at the onset of a Cook Cycle if
the CT detects current or when the magnetron is
successfully energized in the Test Mode.
F4: Door Monitor Defective
F
ault is displayed when the Control detects that the
Monitor Interlock Switch unlatches before both the
Primary and Secondary Interlock Switches during a
Cook Cycle.
In addition this fault will blow the F3 Fuse if the
microwave high voltage system is energized when
the fault occurs.
The fault is clear
ed only when the
oven is turned Off and On.
COOK COUNT
F1 BLOWER
F2 LOW TEMP
F3 MAG CURR
F4 MONITOR
F5 MAG TEMP
F6 TEMP
S/N XXXXXX
NGCVXXXX XXXXXX
0
0
0
0
0
0
0
: Fault Display
FAULT CODES
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