Turbo Chef Technologies Residential Single and Double Wall Oven Magnetron Cooling Fan

5.10OVEN SYSTEMS

Magnetron Cooling Fan Relay - K2 Monitor (Gen 1 Oven)

The magnetron cooling fans supply air to the magnetrons. For Gen 1 ovens, they are actuated by the K5 relay. For Gen 2 ovens, they are actuated by relay 4 on the relay board (RBJ19-1). At the end of a microwave cook cycle, the cooling fans will continue to operate for an additional 2 minutes (on older ver- sions of the control software, the magnetron cooling fans run for an additional 5 minutes).

Magnetron Thermostats

The magnetron thermostats are wired in-series with the input voltage of the HV transformers. They open at 280°F (138°C).

Power Supply, 12 VDC

The 12 VDC power supply supplies power to the halogen oven lights.

Power Supply, 24 VDC

The 24VDC power supply supplies voltage to the control board (and relay board for Gen 2 ovens).

The K2 relay is a 30 amp, double-pole, double- throw, class F, 24 VDC relay coil. It is used in the magnetron circuit along with the K3 and K4 relays. If the door is opened during a cook cycle, and the K3 or K4 relays are still closed due to a door switch failure, this relay will cause L1 and L2 voltage to short circuit and blow the 20-amp fuse. The system is designed to protect the user in the case of a door switch failure. The K2 relay coil is supplied with 24 VDC power except when the door is open or oven power is disconnected.

Relay - K3 T1 HV Transformer (Gen 1 Oven)

The K3 relay is a 30 amp, double-pole, double- throw, class F, 24 VDC relay coil. This relay sends L1 voltage to the T1 transformer.

Relay - K4 T2 HV Transformer (Gen 1 Oven)

The K4 relay is a 30 amp, double-pole, double- throw, class F, 24 VDC relay coil. This relay sends L1 voltage to the T2 transformer.

Relay Board (Gen 2 Only)

Gen 2 ovens contain a relay board consisting of the fuses (page 5.9), clock transformer, and all relays described below. If any of these components fail, except the fuses, the entire relay board must be replaced. See page 7.7 for a schematic with test point locations.

-Relay 1: Monitor

-Relays 2 and 3: HV transformers

-Relay 4: Magnetron cooling fan

-Relay 5: Door lock, upper left

-Relay 6: Door lock, upper right

-Relay 7: Cooling fan, upper

-Relay 8: Stirrer motor

-Relay 9: Door light, upper

-Relay 10: Door lock, lower

-Relay 11: Cooling fan, lower

-Relay 12: Convection fan

-Relay 13: Door light, lower

-Relay 14: Pre-heater

Relay - K5 Mag Cooling Fan (Gen 1 Oven)

The K5 relay is a 30 amp, double-pole, double- throw, class F, 24 VDC relay coil. This relay activates the magnetron cooling fan during and after magnetron operation.

Relay - K6 Right Side Door Lock (Gen 1 Oven)

The K6 relay is a 30 amp, double-pole, double- throw, class F, 24 VDC relay coil. This relay controls the right side door lock motor.

Relay - K7 Left Side Door Lock (Gen 1 Oven)

The K7 relay is a 30 amp, double-pole, double- throw, class F, 24 VDC relay coil. This relay controls the left side door lock motor.

Relay - K8 Preheat (Gen 1 Oven)

The K8 relay is a 30 amp, double-pole, double- throw, class F, 24 VDC relay coil. The K8 relay controls the L1 voltage to the Speedcook oven’s preheat element. When the CookWheel is turned to begin the selection process, the control board sends