TurboChef HHB-8028 Service Manual page 35

Is wiring from the
Door Switch to the I/O
Control Board OK?
(See page 61 for
schematic.)
YES
Replace Door Switch.
(page 36)
If problem
persists, replace the
I/O Control Board.
(page 39)
Is wiring from
SSR to I/O Control
(See page 61 for
Replace I/O Control
Board. (page 39)
Troubleshooting:
F2: LOW TMP (Cook Temperature Low)
Does the Display read "Cook Door
YES
Open" when the door is closed?
Correct wiring.
NO
Reset and determine
why it tripped – excess
grease buildup, etc.
(Figure 25, page 20)
Is the SSR defective?
NO
Board OK?
schematic.)
YES NO
Correct wiring.
YES
NO
YES
Replace SSR.
(page 40)
DIAGNOSING AN ISSUE
NO
Is the Hi-Limit
Thermostat tripped?
NO
Is the Heater Element
defective?
YES
Ensure jam nut is
adequately tightened
and flange nut
(behind jam nut) is
not over-tightened.
If the problem
persists, replace the
defective heater.
(page 54)
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