Frymaster LOV Manuel du produit

LOV™FRYER TECHNICAL

REFERENCE MANUAL

FEB 2008

Edition

Introducing the LOV™Fryer 1

The LOV™Systems 2

M2007 11

RTI-equipped Systems 28

Board Replacement 34

Wiring Diagrams 36

Pin Positions 39

Frymaster and Dean Technical Service

8700 LineAve, Shreveport, LA71106

Service Hotline: 800-551-8633

Website: www.frymaster.com *8196358*

LOV™Technical Reference

The Low Oil Volume (LOV™) fryer is a McDonald’s-only, feature-laden version of the RE fryer

introduced in

2006

2006. The enhancements found on the LOV™fryer include:

• Low volume frypot —30 pounds (15 liters) rather than 50 pounds (25 liters) of oil.

• Automatic top-off — the fryer automatically maintains an optimal oil level with a reservoir in the cabinet.

• M2007 computer — a sophisticated controller with multiple levels of programming.

•Automatic ﬁltration — the fryer performs hands-free ﬁltering at prescribed cook cycle counts or at

prescribed times.

• Oil savings — The combination of a low-volume fry vat and oil

automatically kept at a optimal level, reducing oil usage.

A similar fryer, the Protector, is available for the general market. It has the

LOV™’s auto top-off feature and the on-board oil reservoir, the smaller fry vat

and the oil savings associated with smaller vat and the top-off feature.

Filtering using the CM7 computer on a Protector fryer is manual.

Introducing the Low Oil Volume Fryer

The LOV™fryer

M2007 Computer

Filter Light

Diagnostic

LED Screen

Reset

button

Replace JIB Light

JIB

(behind right door)

The Protector Fryer

LOV™Technical Reference

Auto Top Off

The core of the system is an automatic top-off

board, which senses when the oil level is low and

ﬁlls the pot to the top line.

The oil level is monitored by an RTD sensor in

the frypot at the upper oil level. The oil is moved

to the pot from a reservoir, called a JIB (Jug In

Box), to the frypot with a small pump.

A circuit board, the ATO (Automatic Top Off), is

located inside a box behind the JIB. It monitors

the oil-level RTD and activates the pump when

it senses an oil temperature drop of 60°F (33°C)

below setpoint, indicating the oil has moved

away from the sensor. The oil is pumped into a

solenoid tree and the ATO opens the solenoid for

the frypot that needs oil.

Oil is pumped into the tank until the ATO detects

a temperature within 55°F (30°C) of setpoint.

The system is not suited to ﬁlling the frypot when

it is empty and there are safeguards to prevent it

from activating when the fryer is cold and the oil

is resting at the lower position.

The system is not active until the oil in the frypot

reaches 300°F (149°C). That temperature is

monitored by the probe. The activation of the

system is handled by the fryer’s computer. In

the McDonald’s system that is the M2007. The

automatic top off system is also inactive during

ﬁlter cycles.

The system works the same in McDonald’s gas

and electric LOV™systems and in the Protector

fryer, which is made for the general market.

The level of the reservoir, or JIB, is monitored

by the ATO and the M2007 computer. If a low

oil condition is not rectiﬁed in 6 minutes, the low

JIB light is illuminated on the front of the fryer.

The LOV™Systems

LOW Oil

RTD Oil top off

port

Auto Filtra-

tion RTD

High limit

The solenoid tree and the pump, which

move oil from the reservoir to the frypots,

are visible above.

The ATO board controls the top off of

the fry pots.

LOV™Technical Reference

The ATO board is positioned in a box with the transformer,

which provides power for the board. The box also may

have a power switch, which allows the system to be shut

off (switch removed in later models).

The reservoir, or JIB, rests behind the right

door of the fryer.Alight on the front of the fryer

illuminates when the jug is empty.

Problem Probable Cause Fix

JIB light won’t

illuminate. Auto top off power switch is off.

(switch removed in later models)

No three-phase power in the

contactor box/component box

supplying the ATO box.

Failed transformer in ATO box.

Loose wire.

Verify that the auto top off power switch is

switched on. The switch is located behind

the JIB on the left side of the auto top

off control box. (switch removed in later

models)

Ensure power is present

Check transformer output; replace if

necessary.

Check connection between JIB LED and J6

on ATO board.

Only one vat tops

off. Failed solenoid.

Loose wire connection.

2. Check power to pump. A hot pump

suggests a failed solenoid.

Check wiring harnesses on ATO board and

solenoids.

Wrong vat tops off. Wired wrong.

Flex oil lines incorrectly

connected.

2. Check wiring.

Correct ﬂex line connections.

Troubleshooting the Top Off System

Power

Switch ATO

Board

Transformer

Oil trickles into the

frypot from a port

behind the elements in

electric fryers. In gas

fryers, it comes from a

port on the foam deck.

This part of the system

is not designed to ﬁll

up the vat.

Port

Sensor

LOV™Technical Reference

Problem Probable Cause Fix

No vats topping off. Auto top off power switch off.

(removed in later models)

ATO board power loss.

Failed or over tightened pump.

Failed transformer/harness.

Probe temperature lower than

setpoint.

Oil viscosity too thick.

Failed solenoid.

Failed ATO board.

Verify that the auto top off power switch is

switched on. (removed in later models)

The switch is located behind the JIB on the

left side of the auto top off control box.

Check solenoid to see if functioning

properly.

If the solenoid is working, ensure that the

screws on the bottom of the pump are not

too tight. Loosen the screws. If loosening

the screws doesn’t ﬁx the problem, replace

the pump.

Ensure transformer in ATO box is

functioning properly. Check power from

transformer to ATO board. Ensure all

harnesses are plugged securely into place.

Check to see that fryer is heating. Fryer

temperature must be at least 300°F

(149°C). Check probe resistance. If probe

is bad, replace the probe.

Ensure oil viscosity is thin enough to pump.

Power to the ATO board has been cut off.

Restore power to the board and cycle all

computers off and on to readdress system.

Check for proper voltages using the pin

position chart found on pages 40-41 at

the back of this manual. If ATO found

defective, replace ATO board.

LOV™Technical Reference

(1) Responding Yes to the Blue LED

ﬁlter prompt, sets in motion a ﬁlter

cycle that lasts about as long as a

cook cycle. Communication between

the M2007 computer, the manual

interface, or MIB board, and the

automatic intermittent ﬁltration, orAIF

board, handle the process. (2) Linear

actuators open and close the drain

valve and return valve, (3) emptying

and reﬁlling the frypot.

Auto Filtration (MIB and AIF)

The auto ﬁltration system is controlled by the

M2007 computer, the AIF (Automatic Intermittent

Filtration) board and the MIB (Manual Interface

Board). The ﬁltration is made hands-off by linear

actuators operating the drain and return valves.

The computer is programmable, allowing ﬁlter

cycles to be launched after a set number of cook

cycles and a prescribed elapsed time.

The system can be set to lock out automatic

ﬁltration during busy times, such as the lunch rush.

The fryer prompts for ﬁltration by ﬂashing a

blue LED on the front and a text prompt on the

computer. The operator can say no; cooking can

continue.

AYes response leads to communication between the MIB and theAIF boards. The MIB is the more

robust board. It controls and oversees the ﬁltration; the AIF board operates the actuators, which open

and close the valves.

The MIB is in the fryer cabinet and partially covered by a sheet metal cover. The reset button and the

LED display are visible. Buttons behind the cover allow limited manual operation of the system and

its valves. The cover should be reinstalled after service.

The LED displays codes that can be used to diagnose failures (see chart on page 44).

An AIF board is mounted under each fry vat.

123

LOV™Technical Reference

Manual — Used to toggle between automatic

and manual ﬁltration mode. The unit must be

in manual mode for the other MIB buttons to

operate.

Select — Used to scroll through the vats, which

are shown numerically in the LED.

Drain — Used to open and close the drain

valve of the vat indicated on the display.

When pressed an LED on the button indicates

activity: slow blink, awaiting response from

AIF; LED illuminated constantly, drain open;

no illumination, drain closed; rapid blink, no

response from AIF.

Return — Used to open and close the return

valve on the vat indicated on the display. It also

controls the pump. When pressed an LED on the

button indicates activity: slow blink, awaiting

response from AIF; LED illuminated constantly,

drain open; no illumination, drain closed; rapid

blink, no response from AIF. The pump turns off

before closing the return valve; the return valve

opens before the pump is turned on.

The mode display on the face of the MIB board

displays a range of letters, which indicate

activity or an error.

These codes are listed on the next page.

The MIB board

Mode Display

Shows status

(auto or manual)

vat number (when

operating valves

manuals) and dis-

plays error codes.

Manual/Auto

Switches fryer from

auto to manual

operation.

Reset

Resets system,

ensures all valves

are closed.

Drain

Opens and closes

drain valves in

manual mode.

Vat Selection

Selects vat for

manual operation of

valves.

Return

Opens and closes

return valves and

turns on ﬁlter

pump in manual

mode.

The MIB is mounted behind the left door. See arrow.

LOV™Technical Reference

1-8 — Numbers corresponding to the vats.

A— Auto mode, auto ﬁltration enabled.

C— Closed valve, display alternates between C and

vat number. LED blinks.

d— Drain issue; display alternates between d and vat

number.

E— Actuator circuit not sensing actuator; display

alternates between Eand vat number.

(Ensure actuator is plugged in and in home position.)

F — Incomplete ﬁltration; Falternates with nwhen

the MIB doesn’t receive a complete ﬁltration response

from an AIF.

L—Loading; loading fryer conﬁguration. Shown

during initial startup, rare otherwise.

n— Network error; nalternates with r, indicating

a time-out on reset; nalternates with F, indicating

an incomplete ﬁltration response (see Fabove); n

alternating with a vat number and a drain or return LED

blinking; time-out error opening or closing a valve.

O— Open valve; Oalternates with vat number and

blinking LED.

P— Pan switch; ﬁlter pan is not in place or not

sensed. Auto Filtration disabled.

U— Fry battery not conﬁgured; the MIB board is

looking for a message from an M2007, allowing it to

initialize the battery.

r - Reset; r alternating with a vat number indicates

that the MIB board is resetting. If r is displayed

without alternating with a vat number, a problem may

exist with the MIB board itself.

Press the M button, which switches the board to manual. The display becomes

the number of the vat to be controlled manually.

Press the vat selector button until the desired vat number is displayed.

Press either the drain or return button to drain or return oil to the vat displayed.

Pressing both allows ﬁltration.

Pressing the M button again returns the board to automatic mode.

Manual Draining, Filling, Filtering with MIB

Error Codes

LOV™Technical Reference

Problem Probable Cause Fix

Auto ﬁltration

won’t start. Ensure MIB is not in manual mode.

Ensure MIB cover is not pressing

against buttons.

Filter relay failed.

Ensure MIB is in “A” automatic mode and

press the reset button.

Remove and replace cover.

Replace 24VDC ﬁlter relay (807-4482).

MIB doesn’t

display A or vat

number.

An error has occurred and dis-

played character indicates error.

1. Check MIB Diagnostic codes, page 44 of

this manual.

No power at MIB. Transformer failed in left compo-

nent box.

1. Check output on left transformer in left

component box; should be 24VAC. If not,

replace the transformer.

MIB error will not

clear. Power surge or other electrical

problem.

1. Press the reset switch, top right corner of

the MIB, to reinitialize the CAN system. The

reset takes about 20 seconds per vat. The

MIB display should return to “A“, though it

may take more than one minute to do so.

MIB alternating

“n” and “r”.Network error on the CAN bus

communication.

1. Ensure the CAN bus system is terminated

at BOTH ENDS (on the M2007 connector

J6 and on the ATO board connector J10)

with a resistor equipped 6-pin connector.

Ensure all 6-pin CAN connectors are

tight between the M2007 (J6 and J7),

MIB (J1 and J2), AIF (J4 and J5) and

ATO (J10) boards.

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 continuity 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

position (see diagram 805-1656 on page

35 of this manual). Ensure all boards

have the corner ground wire attached

and tightened.

The locator pin in J2 of the AIF board is

either loose or in the incorrect position.

See the charts on pages 45-46 of this

manual for proper pin position.

In early units, it is possible that the resis-

tor could short. Disconnect power to

the unit, unwrap the resistor leads, and

ensure they are not touching.

•

Troubleshooting the Manual Interface Board (MIB)

LOV™Technical Reference

MIB displays

incorrect number

of vats.

Network is not terminated correctly.

Wiring harnesses are loose or

damaged.

Locator pin issue.

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. In early

units, it is possible that the resistor could

short. Disconnect power to the unit, unwrap

the resistor leads, and ensure they are not

touching.

Unplug and reseat all wiring harnesses in

CAN system. Check resistance between

pins 2 and 3 on the CAN network connec-

tors. If checking with resistor at the end,

reading should be 120 ohms.

The locator pin in J2 of the AIF board is

either loose or in the incorrect position. See

the charts on pages 45-46 of this manual

for proper pin position.

M2007 display

shows Filter

Error.

A ﬁlter error has occurred. It can

be caused by a clogged ﬁlter pad,

clogged ﬁlter pump, ﬁlter pump

thermal overload or an actuator

failure.

1. Follow the on-screen directions according

to the ﬂowchart on page 27 of this manual

to clear the error. The underlying problem

must also be corrected.

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