Frymaster LOV BIELA14 Service And Parts Manual page 39

Problem
M3000 display shows
TEMP PROBE
FAILURE.
MAINT FILTER
(Manual Filter) won't
start.
M3000 display shows
REMOVE DISCARD.
M3000 display shows
HEATING
FAILURE.
Computer will not go
into program mode or
some buttons do not
actuate.
M3000 display shows
HI 2 BAD.
M3000 display shows
HELP HI-2 or HIGH
LIMIT FAILURE.
M3000 display shows
software for only
M3000 or MIB but not
all boards.
M3000 display shows
low temp, heating
indicator cycles on and
off normally but fryer
does not heat.
Probable Causes
A. Problem with the temperature
measuring circuitry including the probe.
B. Damaged computer wiring harness or
connector.
Temperature too low.
In non-dedicated mode, a product is
dropped that has a different setpoint that
the current vat temperature.
Failed computer, failed interface board,
open high-limit thermostat.
Failed computer.
Computer in high-limit test mode.
Failed high-limit.
Loose or damaged harness
A. Three phase power cord unplugged or
circuit breaker is tripped.
B. Blown fuse
C. Failed computer.
D. Damaged computer wiring harness.
E. Open connection in high-limit circuit.
A. This indicates a problem within the
temperature measuring circuitry. Check
resistance of probe, if faulty replace
probe.
B. Swap the computer wiring harness with
one known to be good. If problem is
corrected, replace the harness.
Ensure fryer is at setpoint before starting
MAINT FILTER.
Remove and discard product. Press a cook
button under the display with the error to
remove the error. Reset the setpoint of the
vat before trying to cook product.
Turn off the vat with the issue. The error is
displayed if the fryer loses its ability to heat
oil. 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.
Replace computer
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.
Check that all harnesses between M3000's,
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 computer from
one bank to another and cycle power on the
fryer.
A. Ensure all cords are fully seated in the
receptacles, locked into place and that
circuit breakers are not tripped.
B. Check three amp fuse on front of control
box.
C. Replace computer.
D. Replace computer wiring harness.
E. Check high limit circuit starting at the
control box connector working to the
high-limit.
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Corrective Action