TurboChef 2020

32 TROUBLESHOOTING
Troubleshooting:
F8: HIGH LIMIT
TRIPPED
Is the high limit thermostat
tripped (page 21)?
R
eset and determine why it
tripped - over temp, blower
failur
e, etc.
Check if the high limit probe
or R
TD is damaged or defec-
tive, replace if needed (page
A-8).
NO
YES
Troubleshooting:
F7: R
TD FAULT
O
pen the right end bell.
Is the RTD damaged or
defective (page 22)?
Is the RTD
connected
pr
operly to the
I/O contr
ol
boar
d
(pages 37-40)?
R
eplace the I/O
control board
(page A-8).
NO
Corr
ect wiring
(pages 37-40).
Replace the RTD
(page A-8).
YES
NO
NO
YES
Are all the contacts
closed on the high
limit thermostat?
I
s the wiring
corr
ect (pages
37-40)?
NO
YES
R
eplace the high
limit thermostat
(page A-6).
NO
YES
Correct wiring
(pages 37-40).
R
eplace the I/O
control board
(page A-8).
Is the RTD open? Using an ohmmeter,
measure at the control board (pages 37-
40). RTD should measure
approximately 100 W at 32°F (0°C) See
page 22 for ohm/temperature chart.
YES