Frymaster H55 Series Technical Reference Manual page 76

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Bulk Oil-equipped Systems

Some stores may be equipped with bulk oil storage systems. If so, some of the settings, wiring, and

troubleshooting may differ from normal LOV and FilterQuick fryer systems. The LOV and Filter-

Quick fryers will ONLY operate with bulk systems that have a three-pole ﬂ oat switch. If the

ﬂ oat switch is the older two-pole switch, call the bulk system provider. The ﬂ oat switches are

polarity speciﬁ c and may short to ground and damage the MIB board.

Normal AC Voltage Measurements

• Pin 1 to Pin 2 - 24 VAC.

• Pin 2 to Pin 8 - 24 VAC when waste tank is full, 0 VAC when it is not full.

• Pin 2 to Pin 3 - 24 VAC when RTI ﬁ ll pump is on, 0 VAC when it is off.

Troubleshooting

Bulk oil system pump is not operating or JIB is not ﬁ lling:

1. Reset the power; wait 60 seconds and see if the valve opens.

With the JIB button pressed:

2. Voltage at MIB board from Pin 1 to Pin 2 should be 24 VAC. If not, check connections from

bulk system 24VAC transformer and check transformer's output.

3. Voltage at MIB board from Pin 2 to Pin 3 should be 24 VAC when ﬁ lling the JIB or vat; if not,

MIB board is bad or wires to pump relay are shorted or both.

4. Voltage at bulk system's add pump relay should be 24 VAC; if not, check wiring from MIB

board. Check bulk system's relay.

5. Check voltage at ATO board on J8. Pin 9 to Pin 1 should be 24 VAC when the orange button

is pressed.

Waste full signal: Pin 2 to Pin 8 should be 24 VAC when full, 0 VAC when not full; if there is no

voltage change, then the connection from the bulk system switch or MIB board is bad.

Automatic Filtering Fryers

(MIB J6 8-pin connector with everything connected)

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Ocf series Filterquick series Lov series