5. OPERATION
22
SYNTHESIS E
To indicate that the ignition has been enabled, in the idle state the
display shows the date and time of the next time (Fig.22). ). If the ignition is
turned off, instead of the day and time the message appears "OFF".
5.5.
Switching off the oven
Press the key
to switch off the oven
(Fig.23).
The heating stops while the air recycling
fan and conveyor continue working (if
already on) until the temperature drops
below 150°C. Then the main contactor de-
energizes leaving only the circuit board
powered to feed the clock and programmed
switching on functions.
During the switching off phase the rear illumination remains on and the
word “OFF” flashes. During this phase the oven can be switched back on
and the conveyor can be started or stopped.
To prevent the oven being accidentally switched on, check if the display
indicates the desired day and time of switching on, or, if automatic
switching on is not desired, that the words “START : OFF” appear.
5.6. Alarms
The functioning of the oven is continuously checked. An alarm procedure
is activated if any faults arise.
5.6.1.
“OVER 1”
If the temperature measured by probe 1 exceeds 350°C or if the probe
breaks, the temperature value on the display is replaced by the flashing
words “OVER 1” and the alarm sounds intermittently.
The alarm can be switched off by pressing the key
.
The oven continues working and only the probe 2 is used to measure the
temperature. The control temperature is automatically decreased by 40°C.
This variation in the temperature value is effected to correct the only
value taken in the hottest part of the oven, and to simulate a value near to
the real one previously elaborated by making the average between the
hottest and coldest points. This allows the oven to be used even when a
probe breaks.
5.6.2.
“OVER 2”
If the temperature measured by probe 2 exceeds 450°C or if the probe
breaks, the temperature value on the display is replaced by the flashing
words “OVER 2” and the alarm sounds intermittently.
The alarm can be switched off by pressing the key
.
23
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