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1.13.1 ATO (Automatic Top-Off) Troubleshooting
Problem Probable Causes Corrective Action
The yellow JIB low
light won’t illuminate.
A. Power not present in the transformer
box.
B. Failed transformer.
C. Loose wire connection
A. Ensure power is present in the
transformer box.
B. If power is present in transformer
box, check the transformer for
correct voltage.
C. Ensure the yellow LED is securely
attached to plug J6 on the ATO
board.
Frypots won’t top off.
A. Probe temperature lower than
setpoint.
B. Oil is too cold.
C. ATO board power loss
D. Failed solenoid.
E. ATO pump failed or over tightened.
F. Failed transformer/harness.
G. Failed ATO board.
A. Check to see that fryer is heating.
Check probe resistance. If probe is
bad, replace the probe.
B. Ensure that the oil in the JIB is
above 70°F (21°C).
C. Power to the ATO board has been
cut off. Ensure the board has power
and cycle ALL computers off and
on to readdress system.
D. Check solenoid to see if functioning
properly.
E. If the solenoid is working, ensure
that the screws on the bottom of the
pump are not too tight. Loosen the
screws. If loosening the screws
doesn’t fix the problem, replace the
pump.
F. Ensure transformer in ATO box is
functioning properly. Check power
from transformer to ATO board.
Ensure all harnesses are plugged
securely into place.
G. Check for proper voltages using the
pin position chart found on page 1-
31. If ATO found defective, replace
ATO board.
One vat tops off but
other vats fail to top
off.
A. Failed solenoid
B. Loose wire connection.
A. Check power to the pump. A hot
pump suggests a failed solenoid.
B. Ensure all wiring harnesses are
securely connected to ATO board
and solenoids.
Incorrect vat tops off.
A. Wired incorrectly.
B. Flexlines connected to wrong vat.
A. Check wiring.
B. Switch flexlines to correct vat.