Welbilt Frymaster FilterQuick FQG30 Series Service Manual page 32

Problem
Frypots won't top off.
Incorrect vat tops off.
One vat doesn't top off.
Controller displays
SERVICE
REQUIRED – ATO
BOARD
Probable Causes
A. Empty JIB.
B. Probe temperature lower than setpoint.
C. Oil is too cold.
D. Crumb build up around sensor.
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. Wired incorrectly.
B. Flexlines connected to wrong vat.
A. Filter error exists.
B. Actuator, pump, loose connection, RTD
or ATO issue.
A.
Loose or bad fuse
B.
Bad Connection
C.
ATO Board power loss
A. Ensure JIB has oil.
B. Check to see that fryer is heating. Fryer
temperature must be at setpoint. Check
probe resistance. If probe is bad, replace
the probe.
C. Ensure that the oil in the JIB is above
70°F (21°C).
D. Clean crumbs from opening surrounding
sensor.
E. With the controller OFF, press the
temperature button and ensure the ATO
software version appears.
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 (J9 or 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.
voltage to pump. Replace the pump if
defective.
I. Check for proper voltages using the pin
position chart found on page 1-28. If
ATO found defective, replace ATO
board.
J. Clear the lines/pump.
A. Check wiring.
B. Switch flexlines to correct vat.
A. Clear filter error properly.
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.
A. Ensure fuse on right side of ATO box is
secure and good.
B. With the controller OFF, press the
temperature button and ensure the ATO
software version appears.
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 (J9 or J10) boards.
C. Power to the ATO board has been cut off.
Ensure there is correct voltage to the
ATO transformer. Restore power to the
board and clear any service required
errors.
1-27
Corrective Action
If not, the
If not, the
Check
When