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

6.4TROUBLESHOOTING

Blower Failure Troubleshooting		Control System
1.	Confirm the motor is turning freely. Check for	This section contains testing and troubleshooting
	obstructions.	procedures for the following components:
2.	Test the upper motor for 0-10 VDC incoming on	- Clock assembly
		- Control board
	- Gen 1: P10-1 and P7-17 (control board)
		- CookWheel control (Speedcook oven)
	- Gen 2: RBJ22-5 and RBJ22-8 (relay board)
		- EMI filter
3.	Test the lower motor for 0-10 VDC incoming on	- Oven mode switch (lower oven)
	- Gen 1: P10-2 and P7-19 (control board)	- Power supply, 12 VDC
	- Gen 2: RBJ22-6 and RBJ22-8 (relay board)	- Power supply, 24 VDC
4.	Check for line voltage to the motor controller	- RTD
		- Transformer, clock, 12 VAC (located on relay
	(power is supplied from the EMI filter).	board on Gen 2 ovens)
5.	Ohm-test the motors for 5.9-7.3 ohms.
		Clock Assembly

Oven Over Temperature

To prevent temperature from running away during normal oven operation, each oven cavity is monitored by a thermostat (270°F [132°C] switch for Speedcook cavity and 280°F [138°C] for the lower oven cavity in double wall ovens). In both the single and double wall oven, the switch(es) are wired to the control board through P7-18 and P8-6 (Gen 1) or pins J15-18 and J15-19 (Gen 2). If the ambient temperature near these thermostats exceeds the temperatures given above, this error screen is displayed. The thermostats are self reset- ting; however, the oven is disabled until both switches are closed.

Possible causes:

-Overheated oven

-Faulty wiring

-Faulty thermostat switch

-Faulty control board

Component Testing and

Troubleshooting

This section contains the following sub-sections:

-Control system

-Halogen light system

-Cooling system

-Air impingement system

-Microwave system

-Heating system, Speedcook oven

-Heating system, lower oven

1.Access the upper electrical compartment.

2.Apply voltmeter probes to pins 1 and 5 on the clock assembly.

3.If approximately 12 VAC is present, the clock assembly is faulty and needs to be replaced. If no voltage is present, test the 12 VAC transformer.

Control Board

1.Verify all wiring is secure and correctly connected. See section 7 for wiring schematics.

2.Ensure the SD card is in the unlocked position (always remove power form the oven before removing the SD card).

3.Troubleshoot other oven components related to the failure if applicable.

4.If required, replace the control board.

5.Fill out the tag supplied with the replacement board (identifying the issue) and return it to TurboChef with the bad control board.

CookWheel Control (Speedcook Oven)

1.Access the upper electrical compartment.

2.Verify the CookWheel’s switch closes and opens normally. This test assumes that the CookWheel is receiving voltage from the 15-amp fuse (see page A.15 for Gen 1 location, page A.19 for Gen 2 location). If no voltage is present, then the lights, screens, clock, etc. will not function.

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