Frymaster M3000 LOV Generation II Technical Reference, Problem, Probable Cause, Corrective Action

LOV™ Generation II Technical Reference

Problem	Probable Cause	Corrective Action
		A. 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.
		B. 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.
		C.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.
		D.Check to see if MIB has 24V on pins 5 and
MIB board alternat-	Network error on the CAN bus	6 of J2. Check to see if 24V is present on
ing “E” and “vat	communication.	pins 5 and 6 of wire harness plugging into
number and side.”		J4 or J5 of the first AIF board. If 24V miss-
		ing, check the pins. Replace the harness if
		necessary.
		E. 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).
		F. Ensure black computer locator wires are
		connected from ground to correct pin posi-
		tion (see pages 43-47).
		G.Ensure all boards have the corner ground
		wire attached and tightened.
		H.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.
		I. Bad MIB and/or AIF board.
		J. Broken resistor lead. Unwrap the resistor
		leads and check ends.

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