Automatic Filtering Fryers
4-9
Problem Probable Causes Corrective Action
Frypots won’t top off.
A. Probe temperature
lower than setpoint.
B. Oil is too cold.
C. Bad connection.
D. ATO board power loss.
E. Failed transformer/
harness.
F. ATO pump failed.
G. Failed ATO board.
H. ATO pump/lines
plugged
I. Empty JIB
A. Fryer temperature must be at setpoint.
Check ATO probe resistance. If probe is bad,
replace the probe.
B. Ensure that the oil in the JIB is above 70°F
(21°C).
C. With the controller OFF, press TEMP button
and ensure the ATO version appears. If not,
the connection between the AIF and the ATO
board may be bad. Ensure the 6-pin CAN
connectors are tight between AIF (J4 and J5)
and ATO (J10) boards.
D. Power to the ATO board has been cut off.
Restore power to the board and clear any
service-required errors.
E. Check power from transformer to ATO board.
Ensure all harnesses are plugged securely
into place.
F. Check voltage to pump. Replace the pump if
defective.
G. Check for proper voltages using the pin-
position charts found on pages 1-53 — 1-56.
If ATO found defective, replace ATO board
and clear any errors.
H. Clear pump/lines.
I. Ensure JIB has oil.
One vat tops off but other
vats fail to top off.
A. Loose wire connection.
B. Actuator issue.
A. Ensure all wiring harnesses are securely
connected to ATO board and solenoids.
B. Check return actuator to ensure actuator is
functional.
Incorrect vat tops off.
A. Wired incorrectly.
B. Flexlines connected to
wrong vat.
A. Check wiring.
B. Switch fl exlines to correct vat.
One vat doesn’t top off.
A. Filter error exists.
B. Actuator, pump, loose
connection, RTD or
ATO issue.
A. Clear fi lter error properly. When
change
filter pad
(or paper)
YES/NO is
displayed, do NOT press any button until
the pan has been removed for at least thirty
seconds. After thirty seconds have elapsed,
the controller returns to OFF or last display.
B. Check actuator, ATO pump, wire connections,
RTD and ATO board.
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