Frymaster M3000 Troubleshooting the Manual Interface Board MIB, Problem, Probable Cause, number

LOV™ Generation II Technical Reference

Troubleshooting the Manual Interface Board (MIB)

Problem	Probable Cause	Corrective Action
	1. Filter pan out of position.	1. Ensure filter pan is fully inserted into fryer.
	2. Oil Level is too low.
		2. Ensure oil level is above the oil level sen-
	3. Ensure MIB board is not in
		sor.
	manual mode.
		3. Ensure MIB board is in “A” automatic
Auto filtration	4. Ensure MIB cover is not
		mode.
won’t start.	damaged and pressing
		4. Remove and replace cover and see if filtra-
	against buttons.
		tion will start.
	5. Filter relay has failed.
		5. Replace filter relay with part number 807-
	6. AIF disable is set to YES,
		4482 24VDC relay.
	blue light doesn’t light.
		6. Set AIF disable in Level 1 to NO.
	7. Filter motor thermal switch
		7. Press filter motor thermal switch.
	is tripped.
		8. Ensure AIF clock is set to disabled.
	8. AIF clock enabled.
MIB display shows	An error has occurred and	See MIB display diagnostics on page 46 for
something other
	displayed character indicates	explanation.
than an “A” or vat
	error.
number.
No power present	Transformer has failed in left	Check output on the left transformer in left
		component box; should read 24VAC. If not
at the MIB board	component box.
		replace transformer.
		Press and hold reset button in top right cor-
		ner for five seconds. The drain, return and
MIB will not clear	Error remains in non-volatile	manual/auto LEDS will illuminate and the MIB
error.	memory.	will reset and clear any remaining errors from
		memory. Allow 60 seconds to reset. If an error
		still exists, then another issue exists.
		Ensure the CAN bus system is terminated at
		BOTH ENDS (on the M3000 connector J6 and
		on the ATO board connector J9) with a resistor
		equipped 6-pin connector.
		• Unplug and reseat all wiring harnesses in
		CAN system. Resistance between pins
		2 and 3 on the CAN network connectors
MIB indicates in-		should be 120 ohms.
		• Check software version numbers on all
correct number of
		M3000 computers and ensure all display
vats.
		an AIF version. If an AIF version is miss-
		ing, the AIF board may be missing power.
		Check pins 5 and on J4 and J5 of the af-
		fected AIF board for proper voltage.
		• The locator pin in J2 of the AIF board is
		either loose or in the incorrect position.
		See the chart on pages 47 of this manual
		for proper pin position.

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