TurboChef NGO/SOTA - Control System; Control Board; Cooling Fans; Display

OVEN SYSTEMS
27
C
on
trol System
This section contains information about the
following components:
-
Control board
- Cooling fans
- Display
-
E
lectrical compartment cooling fan thermostat
- Electrical compartment thermocouple
-
EMI filter
- Ethernet extension cable
- Fuses
- High-limit thermostat
-
Keypad
- LED Light Ring (Sota only)
-
Magnetron thermostats
-
Power supply, 24 VDC
-
Relay (K1 - Filament)
- Relay (K2 - Magnetron cooling fans)
-
R
elay (K3 - Stirrer)
- Relay (K6 - Voltage)
- Relay (K7 - Monitor)
- Relay (K8 - Anode)
-
RTD, 3.0”
- Smart card reader
-
Solid state relay (K4/K5 - Heater)
-
Speaker
-
Voltage sensor
- Wire harness
Control Board
The contr
ol boar
d controls each electrical com-
ponent of the oven. See page 45 for a schematic.
24 VDC can be measured at pin 2 of the J7 con-
nector to confirm control voltage is being applied.
When replacing a control board, determine if the
o
ven is connected to the store’s network. If so:
1.
Record the oven’s network information:
a. While the oven is off or cooling down,
press the INFO key.
b
.
Press the DOWN arrow key to scroll to
scr
een 2.
c. Select “Set Options.”
d.Select “Network Setup.”
2. Record the IP, Mask, Gateway, DNS1 and
DNS2 numbers.
3. Input these numbers after replacing the
control board.
If the control board is damaged to the point of not
allo
wing access to the N
etwork Setup screen, have
the store contact its Oven Connect administrator
to obtain the pr
oper network settings.
Cooling Fans
Ther
e ar
e seven total cooling fans. The three fans
across the top of the back panel are inlet fans and
the other four ar
e outlet fans.
The four electrical compar
tment cooling fans on
the back panel and the one underneath the oven
are actuated by the cooling fan thermostat when
the temperature of the electrical compartment
reaches 120
º
F (49
º
C). The two magnetron cooling
fans (located on each side of the oven) are actuated
b
y the K2 relay when the magnetrons are in opera-
tion, and r
emain on for four minutes and fifteen
seconds after the magnetr
ons turn off. They oper-
ate at:
-
208/240
VAC (60 Hz with voltage sensing)
- 220 VAC (60 Hz with no voltage sensing)
- 230 VAC (50 Hz installations)
Display
The TFT display is the primary user interface.
Both 24
VDC and 5 VDC are supplied from the
contr
ol board through the 3-pin power cable. 24
VDC is used for the backlighting and 5
VDC is
used for the logic systems.
Elec
tr
ical Compartment Cooling Fan
T
hermostat
The cooling fan thermostat actuates the five rear
cooling fans when the electrical compar
tment
temperatur
e r
eaches 120
º
F (49
º
C).
Elec
tr
ical Compartment Thermocouple
The electrical compar
tment thermocouple is part
of the control board and measures the temperature
of the electrical compartment. If it is above 158
º
F
(70
º
C), an F6: EC TEMP fault will display. The
contr
ol board checks the electrical compartment
temperature once every 60 seconds.
EMI F
ilt
er
The EMI filter helps suppress the amount of RF
interference emitted by the oven.