Welbilt Frymaster McDonald's LOV BIGLA30 Gen II Series Installation, Operation And Maintenance Manual page 81

7.2 Troubleshooting Fryers
7.2.1 Computer and Heating Problems
PROBLEM
No display on the
computer.
M3000 displays IS
VAT FULL?
YES NO after a
filtration.
M3000 display shows
IS DRAIN CLEAR?
M3000 displays
CHANGE FILTER
PAD?
Fryer does not heat.
Fryer is operating
normally, but recovery
is slow when cooking.
Fryer is operating
normally, but produces
a popping sound when
burners ignite.
Computer locks up.
M3000 display shows
misconfigured
energy type
PROBABLE CAUSES
A. Computer not turned on.
B. No power to fryer.
C. Failed computer or other component
A filter error has occurred due to dirty or
clogged filter pad or paper, clogged pre-
filter (if applicable), clogged filter
pumps, improperly installed filter pan
components, worn or missing O-rings,
cold oil or filter pump thermal overload.
Drain is clogged and oil failed to drain.
Filter error has occurred, filter pad
clogged, 25 hour filter pad change prompt
has occurred or change filter pad was
ignored on a prior prompt.
A. Drain valve not fully closed.
B. Gas valve is not turned on.
C. Manual gas shut off valve closed.
D. Improperly connected quick-
disconnect fitting on gas line.
E. Obstructed or failed combustion air
blower.
Dirty or obstructed combustion air blower.
A. Dirty or obstructed combustion air
blower.
B. Dirty or obstructed gas valve vent tube
(non-CE fryers only).
C. Malfunctioning combustion air blower.
Computer error.
Energy type in fryer setup is incorrect.
CORRECTIVE ACTION
A. Press the ON/OFF switch to turn the
computer on.
B. Verify that the fryer is plugged in and
that the circuit breaker is not tripped.
C. Call your FAS for assistance.
Follow instructions on page 5-4 through 5-
6 to clear the filter error. If a pre-filter is
installed, clean the pre-filter as
instructed in Appendix D "Pre-Filter
Maintenance". If problem persists, call
your FAS for assistance.
Clear drain with Fryers Friend and press
 (1) YES
resume.
Change the filter pad and ensure the filter
pan has been removed from the fryer for a
minimum of 30 seconds. Do NOT ignore
CHANGE FILTER PAD prompts.
A. Check status of MIB – Ensure A is
displayed.
B. Turn the gas valve knob to the ON
position.
C. Verify that any in-line manual shut off
and gas main valve is open.
D. Verify that the quick-disconnect
fitting on the flexible gas line is
firmly connected to the fryer.
E. Verify that combustion air blower is
running. If not, call FAS for service.
If combustion air blower is functional,
clean and adjust per instructions in
Chapter 6 of this manual.
Clean and adjust per instructions in
Chapter 6 of this manual.
A. Clean and adjust per instructions in
Chapter 6 of this manual.
B. Clean per instructions in Chapter 6 of
this manual.
C. Call your FAS.
Remove and restore power to the
computer. If problem persists, call your
FAS for assistance.
Set proper energy type. Press 1234 to
enter setup to properly configure fryer.
7-2
button. Filtration will