Frymaster LOV - MIB (Manual Interface Board) Troubleshooting

1.2.2 MIB (Manual Interface Board) Troubleshooting
Problem Probable Causes Corrective Action
Auto filtration won’t
start.
A. Check that MIB board is not
in manual mode.
B. Check to see that the MIB
cover is not damaged and
depressing the buttons.
C. Filter relay has failed.
A. Ensure MIB board is in “A”
automatic mode. Press the reset
button.
B. Remove and replace cover and see if
filtration will start.
C. Replace filter relay with part number
8074482 24VDC relay.
MIB display shows
something other
than an “A” or vat
number.
An error has occurred.
See MIB display diagnostics on page 12
for explanation.
No power present at
the MIB board
Transformer has failed in left
component box.
Check the left transformer in left
component box. Should read 24VDC. If
not replace transformer.
MIB error will not
clear.
Power surge or other electrical
problem.
Press the reset switch on the top right
corner of the MIB board. This will
reinitialize the CAN system. This reset
takes about 20 seconds per vat. It could
exceed one minute before returning to
“A”.
MIB indicates more
or less vats than
fryer has.
A. Network is not terminated
correctly.
B. Wiring harnesses are loose
or damaged.
A. Ensure the CAN bus system is
terminated at BOTH ENDS (on the
M2007 connector J6 and on the ATO
board connector J9) with a resistor
equipped 6-pin connector. The resistor
can be shorted. If so, remove the
shrink wrap and ensure that the resistor
leads are not touching.
B. Unplug and reseat all wiring harnesses
in CAN system. Check resistance
b
etween pins 2 and 3 on the CAN
network connectors. If checking with
resistor at the end reading should be
120 ohms.
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