1-15
1.11.1 ATO (Automatic Top-off) Troubleshooting
Problem Probable
Causes Corrective
Action
Frypot tops off cold.
Incorrect setpoint
Ensure setpoint is correct.
No power to ATO board
A.
J5 connection unplugged
B.
Fuse blown
C.
Transformer malfunction
A.
Check to ensure J5 on front of ATO board
is fully locked into connector.
B.
Ensure fuse below right control box is not
blown and fuse on the right side of ATO
box is not blown.
C.
Check that proper voltage is present at
transformer. See table in section 1.11.2.
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 flexlines to correct vat.
One vat doesn’t top off.
A.
Filter error exists.
B.
Actuator, pump, loose connection, RTD
or ATO issue.
A.
Clear filter error properly. When
CHANGE FILTER PAPER YES/NO is
displayed, do NOT press any button until
the pan has been removed for at least
thirty seconds. After thirty seconds the
controller returns to OFF or last display.
B.
Check actuator, ATO pump, ATO board,
wire connections and RTD.
Frypots won’t top off.
A.
Empty JIB.
B.
Crumb build up around sensor.
C.
Probe temperature lower than setpoint.
D.
Oil is too cold.
E.
Bad Connection
F.
ATO board power loss
G.
Failed transformer/harness
H.
ATO pump failed
I.
Failed ATO board.
J.
ATO lines/pump plugged
A.
Ensure JIB has oil.
B.
Clean crumbs from opening surrounding
sensor.
C.
Check to see that fryer is heating. Fryer
temperature must be at setpoint. Check
probe resistance. If probe is bad, replace
the probe.
D.
Ensure that the oil in the JIB is above
70°F (21°C).
E.
With the controller OFF, press the
temperature button and ensure the ATO
software 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.
F.
Power to the ATO board has been cut off.
Restore power to the board and clear any
service required errors.
G.
Ensure transformer in ATO box is
functioning properly. Check power from
transformer to ATO board. Ensure all
harnesses are plugged securely into place.
H.
Ensure pump is operational. Check
voltage to pump. Replace the pump if
defective.
I.
Check for proper voltages using the pin
position chart found on page 1-17. If
ATO found defective, replace ATO board
and clear any errors.
J.
Clear the lines/pump.
