TurboChef Technologies Residential Single and Double Wall Oven User Manual
Page 59
OVEN
SY
STEMS
5.11
SD Card
Th
e SD card, which is inserted into the control
board, stores the control software for the oven.
CAUTION: When inserting an SD card,
always ensure it is set to unlocked; otherwise the
oven will not properly save settings. DO NOT
remove the card when the oven is powered up.
Before replacing the SD card, back up Favorites to a
USB drive (page 4.3)
After replacing the SD card,
1. Restore Favorites from the USB drive (page 4.3).
2. Set the Oven Confi guration to single or double
(page
4.4).
Selector Switches
When the CookWheel or the lower oven selector
switch is turned to a setting other than off , the
switch between terminals 1 and 2 is closed. Th
is
supplies L2 voltage to the lower cooling motor, the
activating terminal on the K13 lower heating
element relay, and the CookWheel to supply power
to the upper cooling motor. In other words,
whenever an oven is turned on, the electrical
compartment cooling fans also turn on. In Gen 1
ovens, the fans will turn off when the oven is turned
off . In Gen 2 ovens, the cooling fans will remain on
for an additional two minutes after the oven has
been turned off .
NOTE: Th
e electrical cooling fans will also turn on
at any time regardless of the selector switch position
if the temperature within the upper electrical
compartment exceeds 140°F (60°C), or if the
temperature within the lower electrical compartment
exceeds 160°F (71°C).
In double wall ovens, the K13 N.O. closes and sup-
plies L2 voltage to the bake, convection, inner broil,
and outer broil elements. When a convection cycle is
selected, the convection fan is also powered and will
remain on until the convection cycle is no longer
selected.
24 VDC to the activating terminals of the relay. Th
e
N.O. switch closes to send L1 voltage to the preheat
element. When the RTD registers that the oven has
reached 80% of the preset temperature, the control
board stops sending 24 VDC to the K8 relay and the
switch opens to turn off the preheat element.
Relay - K9 L2 Speedcook Heating Elements
Th
e K9 relay is a 120 VAC single-pole, double-
throw, relay. Th
is relay supplies L2 voltage to the
three Speedcook oven heating elements. On Gen 1
ovens, this relay also supplies L2 voltage to the upper
and lower cooling fans inline with the 5-amp fuse.
Relay - K10 Lower Door Lock (Gen 1 Oven)
Th
e K10 relay works in conjunction with the lower
oven’s plunger light switch to activate the lower oven
lock motor. Terminal 2 on the selector switch
constantly supplies 120 VAC to the K10 relay’s
common. Th
e control board activates the K10 relay’s
N.O. switch to the lower oven lock motor by using a
circuit inline with the plunger light switch.
Th
is means that the K10 relay will only activate the
lower oven lock motor when the oven door is closed
(plunger pressed).
Relay - K13 L2 Lower Heating Elements
(Double Wall Oven Only)
Th
e K13 relay is a 120 VAC single-pole, double-
throw, relay. Th
is relay supplies L2 voltage to the
four lower oven heating elements.
RJ Cables
Th
e RJ cables connect the control board to the
CookWheel and lower oven Mode and Temperature
switches.
RTD
Th
e RTD uses resistance to register cook cavity
temperature. As heat increases in the oven, so does
the resistance registered in the RTD. Th
is allows the
control board to accurately monitor the temperature
in the oven and activate/deactivate the elements as
needed. Refer to the ohms/temperature chart for
testing (page 6.5).