Control System; Cooling Fans; Display And Ui Control Board (Phoenix); Electrical Compartment Cooling Fan Thermostat - TurboChef Eco Service Manual

40 OVEN SYSTEMS

Control System

This section contains information about the
following components:

• Cooling fans

• Display and UI Control Board (Phoenix)

• Electrical compartment cooling fan thermostat

• Electrical compartment thermocouple

• EMI filter

• Fuses

• High-limit thermostat
• I/O Control board (Sage)
• Magnetron thermostat
• Power supply, 24 VDC
• Relay (K1 - Stirrer)
• Relay (K2 - Anode)
• Relay (K3 - Monitor)
• Solid state relay (K4/K5 - Heater)
• Relay (K6 - Voltage)
• Relay (K7 - Magnetron Cooling Fan)
• RTD
• Speaker
• Transformer thermostat
• USB
• Voltage sensor
• WiFi module
• Wire harness
Cooling Fans
There are five cooling fans. The three fans across the
top of the back panel are inlet fans and the other
two are outlet fans.
The electrical compartment cooling fans are
actuated by the cooling fan thermostat when the
temperature of the electrical compartment reaches
120ºF (49ºC). They operate at 200-240VAC.
The K7 relay actuates the magnetron cooling
fan and the transformer cooling fan when the
magnetron is in operation. The fans remain on
for four minutes and fifteen seconds after the
magnetron turns off. They operate at 24 VDC.
Display and UI Control Board (Phoenix)
The touch display is the primary user interface. It
is a 7-in. capacative touch screen with a tempered
protective glass cover. Included with the display
is the UI control board (Phoenix). The Phoenix
control board handles all UI-related tasks, including
graphics, menu and data storage, and programing/
data transfers,via USB and Wi-Fi.
Electrical Compartment Cooling Fan
Thermostat
The cooling fan thermostat actuates the electrical
compartment cooling fans when the electrical
compartment temperature reaches 120ºF (49ºC).
Electrical Compartment Thermocouple
The electrical compartment thermocouple is
part of the Sage control board and measures the
temperature of the electrical compartment. If it is
above 149ºF (65ºC), an F6: EC TEMP fault will be
displayed on the screen and logged in the fault log;
however, the oven will give the user the option to
continue cooking. If the thermocouple reads above
158ºF (70ºC), the oven will stop cooking. The
control board checks the electrical compartment
temperature once every 60 seconds.
EMI Filter
The EMI filter helps suppress the amount of RF
interference emitted by the oven.
Fuses
The F1 and F2 fuses are 12-amp, ATMR, class CC.
The F3 fuse is 15-amp, ATMR.
The F1 fuse (via brown wire) and F2 fuse (via
blue wire) are designed to blow if an over-current
situation is encountered by the auxilary circuitry,
including the BMSC, any cooling fan, power
supply, or stirrer motor. The F3 fuse is designed
to blow in case of an over-current situation relative
to the microwave system (magnetron, transformer,
diode, capacitor), or if the microwave system is on
when the M (monitor) switch opens, indicating a
door alignment/adjustment issue.