Frymaster LOV M3000 - Manual (Page 10)

LOV ™ Generation II Technical Reference
9
Problem Probable Cause Corrective Action
MIB board alternat-
ing “E” and “vat
number and side.”
Network error on the CAN bus
communication.
Ensure the CAN bus system is terminated
at BOTH ENDS (on the M3000 connector
J6 and on the ATO board connector J10)
with a resistor equipped 6-pin connector.
With the computer OFF, press TEMP but-
ton and ensure the AIF version appears.
If not, the 24V to the AIF boards may be
missing. Ensure all 6-pin CAN connectors
are tight between the M3000 (J6 and J7),
MIB (J1 and J2), AIF (J4 and J5) and ATO
(J10) boards.
With the computer OFF, press TEMP but-
ton and ensure the ATO version appears. If
not, check the CAN wire harness between
the AIF board J4 or J5 and the ATO board
J9 or J10. The ATO fuse on the right side
of the ATO box may be loose or blown;
the 110V to the ATO transformer may be
missing or bad. The J4/J5 connector may
be loose.
Check to see if MIB has 24V on pins 5 and
6 of J2. Check to see if 24V is present on
pins 5 and 6 of wire harness plugging into
J4 or J5 of the fi rst AIF board. If 24V miss-
ing, check the pins. Replace the harness if
necessary.
Check continuity between each color wire
on the CAN connectors into J7 on the far
right computer and J10 on back of the ATO
board (black to black, white to white, and
red to red) and ensure there is no continu-
ity between different color wires (black to
red, red to white, and white to black).
Ensure black computer locator wires are
connected from ground to correct pin posi-
tion (see pages 43-47).
Ensure all boards have the corner ground
wire attached and tightened.
Check for loose locator pin or incorrect
positioning in J2 of the AIF board. See the
charts on pages 43-47 of this manual for
proper pin position.
Bad MIB and/or AIF board.
Broken resistor lead. Unwrap the resistor
leads and check ends. A.
B.
C.
D.
E.
F.
G.
H.
I.
J.