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E-20A
FAN SEN-
SOR STUCK
CLOSED
E-20B
NO DRAFT
CHECK FAN
E-20D
IGNITION
FAILURE
E-21
E-22
NO HEAT
CHECK GAS
VALVE
E-41
E-46
E-47
E-48
E-54C
E-60
4
Cause
Pressure switch
If fan is not running, have pressure switch checked;
failure.
should be open circuit if no air pressure.
Wiring problem.
If fan is running, wiring error, or relay on I/O board
closed.
I/O board failure.
Pressure switch fail-
Press power button to vat off and back on again; if "E-
ure/hose loose.
20-B" persists, have pressure switch checked; should
be open circuit if no air pressure; make sure hose is
connected to fan and pressure switch.
Draft fan failure/low
Have draft fan checked; low voltage going to fan.
voltage.
Flue or hood
Check the fryer flue and hood system for obstruction.
obstruction.
Failure to ignite/no
Press power button to vat off and back on again, if "E-
flame sense.
20-D" persists, check gas line connections; check
gas shutoff valve; check 24V from ignition module
MV wire to control; gas valve checked; check 1 mA
from flame sensor; gas valve and ignition module wir-
ing checked.
Slow heat recovery.
Have a certified service technician check the fryer for
correct voltage to the unit; have heat circuit checked;
have unit checked for loose or burnt wires. Unit has
145 seconds (2 minutes 25 seconds) to go from 250°
F to 300°F.
Burner not igniting.
Have gas valve and heat circuit checked. Check gas
supply, turn off gas supply, and perform quick
disconnect.
Programming
Turn power switch to off, then back to on; if display
failure.
shows an error code, have the controls re-initialized;
if error code persists, have the control board
replaced.
Analog converter
Turn power switch off, then back to on; if "E-47" per-
chip or 12-volt sup-
sists, have the I/O board, or the PC board replaced; if
ply failure.
speaker tones are quiet, probably I/O board failure;
have the I/O board replaced.
Input system error.
Have PC board replaced.
Temperature input
Turn power switch to off, then back to on; have con-
error.
trol PC board replaced if "E-54C" persists.
AIF PC board not
Turn power switch to off, wait 15 seconds, then turn
communicating with
switch back to on. If "E-60 persists, have connector
PC board.
Panel Board Correction
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