Turbo Chef Technologies HHB-8029, HHB-8136, HHB-8028 Troubleshooting F7 Thermo Thermocouple Open

DIAGNOSING AN ISSUE 21

Troubleshooting:

F6: EC TEMP (Electrical Compartment (EC) Temperature High)

Does the oven have room to ventilate?

(not tightly enclosed by other appliances or fixtures?)

YES

NO

Is the oven in an area of moderate

temperature (120ºF (49ºC) or cooler)?

Move oven to open area or remove items that are in close proximity.

NO

Relocate oven to

cooler area.

YES

Are both Cooling

Fans rotating?

YES

Check for

obstructions in the airflow and remove them.

NO

Is Wiring Harness properly connected? Check Cooling Fan Thermostat, I/O Control Board, and Fans. (See page 61 for schematic.)

YES

Replace defective

component – either Cooling Fan Thermostat (page 43), I/O Control Board (page 39), or Fan (page 33).

NO

Correct wiring.

Troubleshooting:

F7: THERMO (Thermocouple Open)

Is the CC

Thermocouple an

open circuit?

Using the Ohm

Meter, measure at 40-pin connector.

CCThermocouple should measure

approx. 4-5 Ohms.

YES

YES

NO

Is the open Thermocouple properly		Correct connection.
	NO
connected to the I/O Control Board?
(See page 61 for schematic.)

Replace the defective Thermocouple.

(page 42)

Replace I/O Control Board.

(page 39)