Turbo Chef Technologies Residential Single and Double Wall Oven Control System, Clock

5.8OVEN SYSTEMS

Control System Air Switch (Single Wall Oven)

This section contains information about the following components:

-Air switch (single wall oven)

-Clock

-Control board

-CookWheel control

-Display, lower oven

-Display, speedcook oven

-Electrical compartment cooling fans

-EMI filter

-Fuses

-High limit thermostats

-Latch mechanism (lower oven)

-Light switch, control panel

-M.O.V. filter

-Magnetron cooling fan

-Magnetron thermostats

-Power supply, 12 VDC

-Power supply, 24 VDC

-Relay board (Gen 2; see diagram on page 7.7)

-Relay - K2 monitor (Gen 1 oven)

-Relay - K3 T1 HV transformer (Gen 1 oven)

-Relay - K4 T2 HV transformer (Gen 1 oven)

-Relay - K5 mag cooling fan (Gen 1 oven)

-Relay - K6 right-side door lock (Gen 1 oven)

-Relay - K7 left-side door lock (Gen 1 oven)

-Relay - K8 preheat (Gen 1 oven)

-Relay - K9 L2 upper heating elements

-Relay - K10 lower door lock (Gen 1 oven)

-Relay - K13 L2 lower oven heating elements

-RJ Cables

-RTD

-SD Card

-Selector switches

-Solid state relay - K1 L1 Speedcook oven heating elements

-Solid state relay - K11 lower oven bake and convection elements

-Solid state relay - K12 lower oven broil elements - inner and outer

-Speaker

-Temperature switch (Lower Oven)

-Transformer, clock, 12 VAC

-Thermostat, cook cavity

-Thermostat, fan control

-USB port

-Wiring harness

For information on accessing and removing parts, see the Appendix.

The air switch monitors the amount of air coming from the exhaust blower in the single wall oven. It is a fail-safe device that communicates to the control board whether or not the exhaust blower is working.

Clock

For Gen 1 ovens, pins 1 and 5 supply voltage to the clock for operation from the clock transformer. For Gen 2 ovens, pins 1 and 5 supply voltage to the clock from terminals RBJ18-1 and RBJ18-2 on the relay board. For all ovens, pins 2 and 3 supply control signals to the control board, which allows the clock to tell the control board when the speaker needs to chime (terminal P24 on Gen 1 ovens and terminal J21 on Gen 2 ovens).

Control Board

The control board controls each electrical compo- nent of the oven. See section 7 for schematics.

CookWheel Control

When the CookWheel is turned to any position except “Off” and “Favorites,” it closes its normally open (N.O.) switch and the upper and lower cooling fans are activated. Also, the three upper oven heating elements receive L2 voltage and the stirrer mo-

tor activates. In any position other than “Off” and “Favorites” the control board also closes the relays that supply L1 voltage to the three heating elements in the upper oven, preheating the oven during the selection process.

Display, Lower Oven

The lower liquid crystal display is the primary user interface for the lower oven.

Attaching the Lower Display Cable

CAUTION: When connecting the lower dis- play to the control board, ensure that it is connected correctly. An incorrect connection can cause the control board and/or the lower display to fail.

A twenty pin female connector connects the lower display cable to the control board. The triangle on the connector denotes pin 1. Ensure that the slot