Turbo Chef Technologies Residential Single and Double Wall Oven service manual Troubleshooting

4.To test the switch in the open position, turn the CookWheel to the off position.

5.Apply the probes of the voltmeter to the now- exposed CookWheel N.O. terminal and ground. T ehvoltage reading should be 0 VAC.

-If voltage is present, the CookWheel control/switch is stuck closed. Replace the CookWheel.

-If no voltage is present, the CookWheel is functioning properly in the open position.

6.To test the switch in the closed position, turn the CookWheel to the Bake position.

7.Apply the probes of the voltmeter to the same CookWheel N.O terminal and ground. The voltage reading should be 120 VAC.

-If no voltage is present, the CookWheel is stuck open and needs to be replaced.

-If 120 VAC is present, the CookWheel is functioning properly in the closed position.

EMI Filter

1.Disconnect power before ohm testing.

2.Check for continuity from Line to Load tabs (both legs). Replace if open.

3.Check for open circuit between L1 and L2 tabs (L1 to case, L2 to case). Replace if shorted.

Oven Mode Switch (Lower Oven)

1.Access the lower electrical compartment by removing the oven frame as shown on page A.10.

2.Verify the oven mode dial switch closes and opens normally. This test assumes that the oven mode dial is receiving voltage from the 15-amp fuse. If no voltage is present the lights, LCD screens, clock, etc. will not function.

3.Disconnect the N.O. blue wire from terminal 2.

4.Test the switch while it is open, turn the oven mode dial to the off position.

5.Apply the probes of the voltmeter to the now- exposed oven mode dial N.O. terminal 2 and ground. The voltage reading should be 0 VAC.

-If voltage is present, the oven mode switch

is stuck closed. Replace the oven mode switch.

-If no voltage is present, the oven mode switch is functioning properly in the open position.

6.Test the switch in the closed position by turning the oven mode dial to the Bake position.

7.Apply the probes of the voltmeter to the same CookWheel terminal and ground. The voltage reading should be 120 VAC.

-If no voltage is present, the oven mode switch is stuck open and must be replaced.

-If 120 VAC is present, the oven mode switch is functioning properly in the closed position.

Power Supply, 12 VDC

1.Test the voltage.

-To test the upper light voltage. Test for 12 VDC at pins 1 and 4 on the power supply.

-To test for lower light voltage. Test for 12 VDC at pins 2 and 3 on the power supply.

2.If the upper or lower lights are not receiving the correct voltage, test for 120 VAC at the blue L2 and white neutral wire terminals.

-If 120 VAC is present at the terminals, disconnect the load wires and recheck for 12 VDC output. Investigate shorted wiring before replacing the power supply.

-If 120 VAC is not present at the terminals, check the 15-amp fuse/fuse block (Gen 1) or fuse output RBJ-6 on the relay board (Gen 2).

Power Supply, 24 VDC

1.Test the voltage.

-For Gen 1, verify voltage to the power supply from the 15-amp fuse.

-For Gen 2, verify voltage to the power supply from terminal RBJ-6 on the relay board.

2.Test for 120 VAC at the terminals at the thick blue and white wires on the left.

-If 120 VAC is not present, then probably no oven functions are operating. Ensure the 15-amp fuse is operating correctly.

-If 120 VAC is present, continue to step 3.

3.Test for 24 VDC at the terminals at the thick red and black wires on the right. If 24 VDC is not present, disconnect the load wires and recheck for 24 VDC output. Investigate shorted wiring before replacing the power supply.

6.5

TROUBLESHOOTING