TurboChef 2020 Service Manual page 52

3 2 T R O U B L E S H O OT I N G
Replace the RTD
(page A-8).
Reset and determine why it
tripped - over temp, blower
failure, etc.
Check if the high limit probe
or RTD is damaged or defec-
tive, replace if needed (page
A-8).
Troubleshooting:
F7: RTD FAULT
Open the right end bell.
YES
Is the RTD damaged or
defective (page 22)?
Is the RTD open? Using an ohmmeter,
measure at the control board (pages 37-
YES
40). RTD should measure
approximately 100 W at 32°F (0°C) See
page 22 for ohm/temperature chart.
Troubleshooting:
F8: HIGH LIMIT TRIPPED
Is the high limit thermostat
YES
tripped (page 21)?
Replace the I/O
control board
(page A-8).
NO
NO
NO
Is the wiring
correct (pages
YES
37-40)?
NO
Correct wiring
(pages 37-40).
Is the RTD
connected
properly to the
I/O control
board
NO
(pages 37-40)?
Correct wiring
YES
(pages 37-40).
Replace the I/O
control board
(page A-8).
Are all the contacts
closed on the high
limit thermostat?
YES
NO
Replace the high
limit thermostat
(page A-6).