Frymaster FilterQuick FQG30 Service Manual page 51

Problem
Controller displays vat
temperature alternating
with MLT-CYCL.
Controller displays
TEMP PROBE
FAILURE.
Controller displays
HEATING
FAILURE.
Controller displays HI
2 BAD.
Controller displays
HELP HI-2 or HIGH
LIMIT FAILURE.
Fryer filters after each
cook cycle.
Controller displays
low temp, heating
indicator cycles on and
off normally but fryer
does not heat.
Controller displays
software for only
controller or MIB but
not all boards.
Probable Causes
Frypot temperature is below 180°F (82°C).
A. Problem with the temperature
measuring circuitry including the
probe.
B. Damaged controller wiring harness or
connector.
Failed controller, failed gas valve, open
drain valve, failed interface board, open
high-limit thermostat.
Controller in high-limit test mode.
Failed high-limit.
Filter after setting incorrect or software
update issue.
A. Dirty oil level sensor
B. Failed controller.
C. Damaged controller wiring harness.
D. Open connection in high-limit circuit.
Loose or damaged harness
This display is normal when the fryer is first
turned on while in the melt cycle mode. To
bypass the melt cycle press the "COOL"
button.
MELT? alternating with YES NO. Press
the YES button to exit melt. If the display
continues, the fryer is not heating.
A. This indicates a problem within the
temperature measuring circuitry.
resistance of probe, if faulty replace probe.
B. Swap the controller wiring harness with
one known to be good.
corrected, replace the harness.
Turn off the vat with the issue. The error is
displayed if the fryer loses its ability to heat oil.
Common issues are open drain valve or closed
or failed gas valves. It sometimes is seen when
air is in the gas line. It is also displayed when
the oil temperature is above 450°F (232°C) and
the high-limit thermostat has opened, halting
the heating of the oil.
This is displayed during a test of the high-limit
circuit to indicate if the high-limit has failed.
This is displayed to indicate the high-limit has
failed.
Overwrite the filter after setting by re-entering
the filter prompt value in Product Setup. Press
and hold the  button until Main Menu
changing to Product setup is displayed.
Press the  button. ENTER
displayed. Enter 1650. Scroll down to Filter
Prompt and set value. Ensure that the right arrow
is pressed after entering the value to save the
setting.
A. Clean carbon build up off oil level sensor
using a no scratch pad.
B. Replace controller.
C. Replace controller wiring harness.
D. Check high limit circuit starting at the
control box connector working to the high-
limit.
Check that all harnesses between controllers,
MIB, AIF and ATO are secure. Ensure 24VDC
is present on pins 5 & 6 of J2 on MIB board
and on J4 or J5 of AIF board. Check for loose
or broken pins/wires. If the problem persists,
swap out controller from one bank to another
and cycle power on the fryer.
1-46
Corrective Action
The controller displays
If problem is
EXIT
Check
CODE is