Frymaster LOV Technical document

LOV Fryer Technical Information Manual
Description Page
1.1 ATO (Automatic Top-Off) Service Procedures……………………….2
1.1.1 ATO (Automatic Top-Off) Troubleshooting………………………….. 2
1.1.2 ATO (Automatic Top-Off) Board #1 Pin Positions/Harnesses……...4
1.1.3 ATO (Automatic Top-Off) Board #2 Pin Positions/Harnesses……...5
1.1.4 Replacing the ATO (Automatic Top-Off) Board/Transformer……... 6
1.1.5 Replacing the ATO Pump/Solenoid………………………………….. 6
1.2 MIB (Manual Interface Board) Service Procedures………………… 6
1.2.1 Manually Draining……………………………………………………… 8
1.2.2 MIB (Manual Interface Board) Troubleshooting…………………….. 8
1.2.3 MIB (Manual Interface Board) Pin Positions/Harnesses…………....10
1.2.4 MIB (Manual Interface Board) Display Diagnostics………………….12
1.2.5 MIB (Manual Interface Board) Auto Filtration Failure Scenarios…...14
1.2.6 Replacing an MIB Board………………………………………………. 14
1.3 AIF (Automatic Intermittent Filtration) Service Procedures…………15
1.3.1 AIF (Automatic Intermittent Filtration) Troubleshooting……………..15
1.3.2 AIF (Automatic Intermittent Filtration) Board #1 Pin Positions......…16
1.3.3 AIF (Automatic Intermittent Filtration) Board #2Pin Positions………17
1.3.4 Replacing an AIF (Automatic Intermittent Filtration) Board…………18
1.3.5 Replacing an Actuator…………………………………………………..18
1.4 M2007 Computer Filtration Service Procedures……………………..19
1.4.1 M2007 Computer Troubleshooting…………………………………….19
1.4.2 M2007 Useful Codes……………………………………………………22
1.4.3 Get Mgr Flowchart……………………………………………………… 22
1.4.4 M2007 Menu Summary Tree..…………………………………………24
1.4.5 M2007 Pin Positions/Harnesses……………………………………….26
1.5 Loading and Updating Software……………………………………….27
1.5.1 Loading Software from SD card to MIB and AIF Boards……………27
1.5.2 Loading Software from SD card to M2007 Computer……………….29
1.6 Tech Mode……………………………………………………………….31
1.7 Fryer Setup Mode……………………………………………………….32
1.8 RTI Service Issues………………………………………………………34
1.8.1 RTI MIB Tests……………………………………………………………34
1.8.2 RTI LOV Wiring………………………………………………………….35
1.8.3 RTI LOV Test Quick Reference………………………………………..36
1.9 Wiring Diagrams…………………………………………………………37
1.9.1 LOV Electric Wiring Diagram with Thermal Sensor ……………….. 37
1.9.2 LOV Electric Wiring Diagram with RTD……………………………….38
1.9.3 LOV Gas Wiring Diagram with Thermal Sensor……………………..39
1.9.4 LOV Gas Wiring Diagram with RTD………………………………….. 40
rev. 12.7.2007
DECEMBER 2007
819xxxx

1.1 ATO (Automatic Top-off) Service Procedures
The automatic top-off system is activated when the oil level falls below a sensor in the rear of the
frypot. The signal is sent to the ATO board to engage the solenoid to the frypot and turn on the
ATO pump. The pump draws oil from the JIB (Jug In Box) to a port in the rear of the frypot.
Once the oil level has satisfied the sensor, the pump and solenoid turn off.
The ATO board is located inside the box, behind the
JIB (see Figure 1). The power for the ATO board in
electric fryers is supplied from the right hand
component box. On gas fryers the power is supplied
from the transformer box in the rear of the fryer. The
power passes through the transformer inside the ATO
box to the board. On the left side of the ATO box is
a power switch, which controls the flow of power
between the component/transformer box and the
ATO board.
Figure 1 Close up of
switch located
on the left side
of the JIB auto
top off box.
1.1.1 ATO (Automatic Top-off) Troubleshooting
Problem Probable Causes Corrective Action
The yellow JIB low
light won’t
illuminate.
A. Auto top off power switch is off.
B. Power in the component box is
not present.
C. Failed transformer.
D. Loose wire connection
A. 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.
B. Ensure power is present in the
component box.
C. If power is present in
component box, check the
transformer for correct voltage.
D. Ensure the yellow LED is
securely attached to plug J6 on
the ATO board.
One vat tops off but
other vats fail to top
off.
A. Failed solenoid
B. Loose wire connection.
A. Check power to the pump. If
the pump is hot, the solenoid
has probably failed.
B. Ensure all wiring harnesses are
securely connected to ATO
board and solenoids.
Incorrect vat tops
off.
A. Wired incorrectly.
B. Flexlines connected to wrong vat.
A. Ensure wires are wired
correctly.
B. Switch flexlines to correct vat.
2

Problem Probable Causes Corrective Action
Frypots won’t top
off.
A. Auto top off power switch is off.
B. Probe temperature lower than
setpoint.
C. Oil viscosity too thick
D. ATO board power loss
E. Failed solenoid.
F. ATO pump failed or over
tightened.
G. Failed transformer/harness.
H. Failed ATO board.
A. 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.
B. 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.
C. Ensure oil viscosity is thin
enough to pump.
D. Power to the ATO board has
been cut off. Restore power to
the board and cycle all
computers off and on to
readdress system.
E. Check solenoid to see if
functioning properly.
F. 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.
G. Ensure transformer in ATO box
is functioning properly. Check
power from transformer to ATO
board. Ensure all harnesses are
plugged securely into place.
H. Check for proper voltages using
the pin position chart found on
page 4. If ATO found
defective, replace ATO board.
3

1.1.2 ATO (Automatic Top-Off) Board #1 Pin Positions (Current Prod with Thermal Sensors)
Connector From/To Harness # Pin # Function Voltage Wire Color
1 Output DV - Vat #1
2 Output FV - Vat #1
3 Output DV - Vat #2
4 Output FV - Vat #2
5 Output DV - Vat #3
Solenoids 8074572 x1 (FV)
8074572 x2 (DV)
6 Output FV - Vat #3
Ground Orange
Top Off Pump 7 Top Off Pump Black
JIB Reset Switch 8074627 8 JIB Low Reset 16VDC Black
9 24VAC DV - Vat #1
10 24VAC FV - Vat #1
11 24VAC DV - Vat #2
12 24VAC FV - Vat #2
13 24VAC DV - Vat #3
Solenoids 8074572 x1 (FV)
8074572 x2 (DV)
14 24VAC FV - Vat #3
24VAC Orange
15 Ground Red
J1
Top Off Pump & JIB
Reset Switch 8074627 16 Ground 16VDC Red
1 24VAC Ret Orange
2 24VAC 24VAC Blue
3
4
5 12VAC Ret Red
6 12VAC 12VAC Brown
7
J3 Transformer 8074553
8
1 FV – SW Out Black
8074569 - Vat #1
8074567 - Vat #2
8074548 - Vat #3 2 FV – Sw In White
3 DV – Sw Out Red
J4 - Vat #3
J5 - Vat #2
J6 - Vat #1
O/Flow Sensor & Fill
Sensor 8074570 - Vat #1
8074568 - Vat #2
8074549 - Vat #3 4 DV – Sw In
16VDC
Green
1 16VDC Black
J7 Orange LED 8074555
2 16VDC Ret 16VDC Red
1
2
3 Ground
4 RB7/DATA
J8
5 RB6/CLOCK
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J9
Network Resistor
(pins 2 & 3)
or to next ATO Board
(4 & 5 vat units)
8074552
6 Ground White
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J10 AIF J5 8074546
6 Ground White
4

1.1.3 ATO (Automatic Top-Off) Board #2 Pin Positions (Current Production with RTD)
Connector From/To Harness # Pin # Function Voltage Wire Color
1 Output DV - Vat #1
2 Output FV - Vat #1
3 Output DV - Vat #2
4 Output FV - Vat #2
5 Output DV - Vat #3
Solenoids 8074572 x1 (FV)
8074572 x2 (DV)
6 Output FV - Vat #3
Ground Orange
Top Off Pump 7 Top Off Pump Black
JIB Reset Switch 8074627 8 JIB Low Reset 16VDC Black
9 24VAC DV - Vat #1
10 24VAC FV - Vat #1
11 24VAC DV - Vat #2
12 24VAC FV - Vat #2
13 24VAC DV - Vat #3
Solenoids 8074572 x1 (FV)
8074572 x2 (DV)
14 24VAC FV - Vat #3
24VAC Orange
15 Ground Red
J8
Top Off Pump & JIB
Low Reset Switch 8074627 16 Ground 16VDC Red
1 24VAC Ret Orange
2 24VAC 24VAC Blue
3
4
5 12VAC Ret Red
6 12VAC 12VAC Brown
7
J4 (Rear) /
J5 (Front) Transformer 8074553
8
1 DV - Probe Ground White
2 DV - Probe Red
3 FV - Probe Ground White
J3 - Vat #3
J2 - Vat #2
J1 - Vat #1 ATO RTD 8074655 - Vat #1
8074654 - Vat #2
8074621 - Vat #3 4 FV - Probe
Ohm
Red
1 16VDC Black
J6 Orange LED 8074555
2 16VDC Ret 16VDC Red
1
2
3 Ground
4 RB7/DATA
J7
5 RB6/CLOCK
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J10
Network Resistor
(pins 2 & 3)
or to next ATO Board
(4 & 5 vat units)
8074552
6 Ground White
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J9 AIF J5 8074546
6 Ground White
5

1.1.4 Replacing the ATO board or Transformer
Disconnect the fryer from the electrical power
supply. Locate the ATO box (see Figure 1 on
page 12), behind the JIB (Jug In Box).
Remove the cover to expose the transformer
and ATO board (see Figure 2). Mark and
unplug any wires or harnesses. Replace the
defective component and reattach all wires or
harnesses. Replace the cover. Once replaced,
reconnect the power. Power cycle all
computers after power has been restored to the
ATO board.
Figure 2
1.1.5 Replacing the ATO Pump or Solenoid
Disconnect the fryer from the electrical power
supply. Locate the ATO pump and solenoid
tree (see Figure 3), behind the ATO box. Mark
and unplug any wires or harnesses. Replace
the defective component and reattach all wires
or harnesses. Once replaced, reconnect the
power.
Figure 3
1.2 MIB (Manual Interface Board) Service Procedures
The MIB (Manual Interface Board) oversees and controls filtration. It receives and sends data
over the CAN (Controller Area Network) to and from various sensors and computers. It
activates the filtration cycle; controlling when actuators should open and close.
The MIB controller is located inside the left cabinet (see Figure 4). In normal operation a cover
hides the MIB controls and the LED display is visible. The cover is held in place with three torx
screws. In normal operation, an “A” is displayed for automatic mode. The MIB control board is
useful for diagnostic purposes. It allows manual operation of both the actuators and filter pump
without using the M2007 computer.
Figure 4: MIB controller cover.
Figure 5
Reset Switch
Drain Switch
Return Switch
Mode Display
Vat Selector
Switch
Manual /Auto
Switch
6

Buttons and LED’s
Manual – This button is used to toggle between auto and manual filtration mode. A
corresponding LED is lit when in Manual mode. When pressed, a message will be sent to all
vats, indicating the mode has changed.
The following buttons are inoperable in auto mode:
Select - This button is used to scroll through available vats, choosing one to be manually filtered.
Drain – This button is used to open and close the drain on the vat indicated on the display.
When the button is pressed and the manual board is waiting for a response from the AIF board,
the corresponding LED will blink slowly. Once a response is received the LED will be
illuminated if the drain is open or extinguished if the drain is closed. If a message was not
received from the AIF board, it times out and the LED will blink rapidly.
Return – This button is used to open and close the return valve on the vat indicated on the
display. It also turns on and off the pump. When the button is pressed and the manual board is
waiting for a response from the AIF board, the corresponding LED will blink slowly. Once a
response is received, the LED will be illuminated if the return is open or extinguished if the
return is closed. If a message is not received from the AIF board, it times out and the LED will
blink rapidly. The pump is turned off first before closing the return valve or the valve will open
first before turning on the pump.
1.2.1 Manually Draining, Refilling or Filtering using the MIB board
Press the manual/auto switch to set to manual.
The LED on the manual key will illuminate
and a vat number is displayed (see Figure 6).
Figure 6
Press the vat selector switch to change vats
(see Figure 7).
Figure 7
Pressing the drain or return switch illuminates
and activates the drain or return valve for the
vat indicated. Pressing both allows filtration
(see Figure 8).
Pressing the manual/auto switch will return to
automatic mode.
Figure 8
7

1.2.2 MIB (Manual Interface Board) Troubleshooting
Problem Probable Causes Corrective Action
Auto filtration won’t
start.
A. Check that MIB board is not
in manual mode.
B. Check to see that the MIB
cover is not damaged and
depressing the buttons.
C. Filter relay has failed.
A. Ensure MIB board is in “A”
automatic mode. Press the reset
button.
B. Remove and replace cover and see if
filtration will start.
C. Replace filter relay with part number
8074482 24VDC relay.
MIB display shows
something other
than an “A” or vat
number.
An error has occurred.
See MIB display diagnostics on page 12
for explanation.
No power present at
the MIB board Transformer has failed in left
component box.
Check the left transformer in left
component box. Should read 24VDC. If
not replace transformer.
MIB error will not
clear. Power surge or other electrical
problem.
Press the reset switch on the top right
corner of the MIB board. This will
reinitialize the CAN system. This reset
takes about 20 seconds per vat. It could
exceed one minute before returning to
“A”.
MIB indicates more
or less vats than
fryer has.
A. Network is not terminated
correctly.
B. Wiring harnesses are loose
or damaged.
A. 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. The resistor
can be shorted. If so, remove the
shrink wrap and ensure that the resistor
leads are not touching.
B. Unplug and reseat all wiring harnesses
in CAN system. Check resistance
b
etween pins 2 and 3 on the CAN
network connectors. If checking with
resistor at the end reading should be
120 ohms.
8

Problem Probable Causes Corrective Action
MIB board
alternating “N” and
“r”.
Network error on the CAN bus
communication.
A. 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. The resistor
can be shorted. If so, remove the
shrink wrap and ensure that the resistor
leads are not touching.
B. 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.
C. 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).
D. Ensure black computer locator wires
are connected from ground to correct
pin position (see drawing 8051656
page 34 and 35).
E. Ensure all boards have the corner
ground wire attached and tightened.
9

1.2.3 MIB (Manual Interface Board) Pin Positions and Harnesses
Connector From/To Harness # Pin # Function Voltage Wire Color
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4
5
J1 M2007 J7 8074546
6
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J2 AIF J4 8074547
6 Ground White
J3 SD Card
1 Momentary Switch - Out 5VDC Red
RTI - JIB Fill Switch 2 Momentary Switch - In 5VDC Black
3 Ground Red
J4 Reset Switch 4 Reset Green
1 24VAC Black
Transformer 2 24VAC Ret 24VAC White
3 Pump Motor Red
Filter Relay 4 Pump Motor 24VDC Green
5 Blue LED + Black
Blue LED 6 Blue LED - 24VDC White
7
8
9
10
11 Pan Sw + Black
Pan Switch 12 Pan Sw - 24VDC Red
13 Ground
14 Ground
15
J5
8074649
16
1 From RTI transformer 24VAC Black
2 Common White
3 To RTI "Add Pump" Relay 24VAC Green
4 To Waste Solenoid - 3 Way 24VAC Brown
5
6 To Fill Solenoid - 3 Way 24VAC Black
7 Ground - Fill Solenoid Black
J6 RTI - Pump &
Solenoids
8 From RTI "Waste Tank Full
Sensor" Test Pins 1 to 8
0VDC –
Full
5VDC –
Not Full
Red
10

1 From RTI transformer 24VAC Black
2 Common White
3
4 To Waste Solenoid - 3 Way 24VAC Brown
5
6 RTI JIB Valve Fill Solenoid 24VAC Green
7 Ground - Fill Solenoid
J7 From RTI Box
8
From RTI "Waste Tank Full
Sensor" Test Pins 1 to 8
0VDC –
Full
5VDC –
Not Full Red
11

1.2.4 MIB (Manual Interface Board) Display Diagnostics
DISPLAY LEDS EXPLANATION
Drain
Vat # Drain led on Drain valve on vat # is open
Vat # Drain led off Drain valve on vat # is closed
Vat # Drain led slow blink Drain valve on vat # is opening or closing
Vat # alternating with O Drain led fast blink Problem opening drain valve on vat#
Vat # alternating with C Drain led fast blink Problem closing drain valve on vat#
Vat # alternating with d Drain led fast blink Problem with drain on vat#. (i.e. possible plugged
drain)
Return
Vat # Return led on Return valve on vat # is open
Vat # Return led off Return valve on vat # is closed
Vat # Return led slow blink Return valve on vat # is opening or closing
Vat # alternating with O Return led fast blink Problem opening return valve on vat#
Vat # alternating with C Return led fast blink Problem closing return valve on vat#
Network
Vat # alternating with n Drain led fast blink Network timeout waiting for response. Could be
on drain opening or on drain closing.
Vat # alternating with n Return led fast blink Network timeout waiting for response. Could be
on return opening or on return closing.
An “r” alternating with an “n” Network timeout waiting for a response on a reset
command.
An “F” alternating with an “n” Network timeout waiting for a success or failure
message during auto filtering.
Initial State, Configuring the system, and resetting
U The state of the battery is unknown. The manual
board is waiting for an INIT_CONFIG message
from a cooking computer. Once the message is
received the manual board will start the process
of determining which fryers have split or full
vats.
L An L will be displayed while the manual board is
contacting the cooking computers for the initial
configuration of the system.
An “r” An “r” is displayed to indicate that the system is
in the process of resetting a vat.
Miscellaneous
Vat # alternating with an “E” The actuator circuit has an issue. Check that the
actuator is plugged in.
Vat # alternating with an “R” The vat is trying to close the corresponding drain
and return valves.
A Manual LED off The system is in auto filtration mode.
Vat # LED fast blinking
There will also be a fast
blinking LED
corresponding to the
problem valve.
The system can not go into auto filtration mode
because there is a problem closing a valve on one
of the vats.
Vat # Manual LED on The system is in manual mode.
P This will only be displayed in auto filtration
mode. It indicates that the pan is not in the
system. Any auto filtration messages received at
this time are ignored.
12

MIB (Manual Interface Board) Display Characters
A– Auto Mode – Auto Filtration enabled.
C– Closed Valve - The display will alternate between Cand the corresponding vat number and
the corresponding valve led is blinking.
d– Drain Issue- The display will alternate between dand the corresponding vat number. This
indicates the drain valve has a problem. i.e. The drain is clogged.
E– Actuator circuit is not sensing the actuator. The display will alternate between Eand the
corresponding vat number. Ensure the actuator is plugged in.
F– An “F” alternating with an “n” appears when the MIB doesn’t receive a complete filtration
response from the AIF board.
L– Loading - Loading the vat configuration from the cooking computers. The MIB has been in
an unknown state (i.e. Initial startup) and is reloading information. This is not displayed often.
n– Network Error - An “n” displayed alternating with another character indicates a network
error. An “r” alternating with an “n” indicates a network timeout on a reset. An “F” alternating
with an “n” appears if the manual board never receives a complete filtration response from the
AIF board. If a vat number is alternating with an “n”, either the drain or the return led is also
blinking, indicating a timeout error opening or closing the drain.
O– Open Valve - The display will alternate between Oand the corresponding vat number and
the corresponding valve led is blinking.
P– Pan Switch – Filter Pan is out of the battery. Filtration is suspended.
r– Reset Switch - Reset the vat closes all of the valves on the vat. If displayed for some time,
there is probably a problem with the board.
U– The battery is not configured. The manual board must receive a message from a cooking
computer telling it to initialize the battery.
1 – 8 – These are the numbers that correspond to the vats. These numbers are displayed in
Manual mode.
13

1.2.5 MIB (Manual Interface Board) Auto Filtration Failure Scenarios
Failure Display Solution
Cannot open drain valve. Vat #alternating with O, fast
blinking drain LED.
Check drain valve.
No message from the cooking
computer, indicating that the oil
has drained out.
Vat #alternating with d, fast
blinking drain LED.
Close drain valve.
Cannot open return valve
Vat #alternating with O, fast blinking return LED.
Close drain valve.
Cannot close drain valve
Vat #alternating with C, fast blinking drain LED.
Turn off pump. Close Return
Valve. Open Drain valve in
case something is stuck.
Actuator is not plugged in. Vat #alternating with E.Plug in actuator.
Cannot close return valve
Vat #alternating with C, fast blinking return LED.
Check return valve.
Manual board never gets a
response back from AIF board
indicating success or failure in
filtering.
“N” is displayed. Check network cable from
MIB plug J2 to AIF plug J4.
1.2.6 Replacing the MIB Board
Disconnect the fryer from the electrical power supply. Remove the torx screws from the MIB
cover, exposing the MIB board (see Figure 9). Removing the four nuts in the corners
disconnects the MIB board. Carefully remove the plugs on the rear of the board (see Figure 10).
Replace with a new MIB board and reverse steps to reassemble. Once replaced, reconnect the
power.
The board will need to be readdressed to the system. Readdress the fryer by pressing and
holding 3and 4simultaneously for TEN seconds until a third chirp is heard and code
appears. Enter 2007. The MIB display will display Lfor several seconds followed by the vat
number alternating with “r” until the readdress is complete. When the readdress is finished, the
MIB board will display A. This step must be done when a MIB board is replaced. The
readdress procedure can be done from any one M2007 computers in the bank.
Figure 9
Figure 10
14

1.3 AIF (Automatic Intermittent) Filtration Service Procedures
The AIF (Automatic Intermittent Filtration)
board controls the actuators that open and
close the drain and return valve. The AIF
boards are located inside a protective housing,
under each frypot (see Figure 11).
Figure 11
1.3.1 AIF Troubleshooting
Problem Probable Causes Corrective Action
Actuator doesn’t
function.
A. Actuator is unplugged.
B. AIF board failure.
C. Actuator is bad.
A. Ensure the actuator is plugged
into the proper connection.
B. Check power on the connector
of the problem actuator while
trying to manually open or close
an actuator. Pins 1 (Black) and
4 (White) should read +24VDC
when trying to open an actuator.
Pins 2 (Red) and 4 (White)
should measure -24VDC when
trying to close an actuator). If
either one of these voltages are
missing, the AIF board may be
bad. Test the actuator by
plugging into another connector
to open or close the actuator. If
the actuator operates, the board
is bad. Replace the board.
C. If proper voltages are present at
the connector and actuator
doesn’t operate, actuator may be
bad. Replace the actuator.
Actuator functions
on wrong vat.
A. Actuator plugged into wrong
connector.
B. Locator pin is in wrong position.
A. Ensure the actuator is plugged
into correct connection.
B. Ensure the locator pin is in
proper position in plug J2. See
table B on page 37-40.
15

1.3.2 AIF (Auto Intermittent Filtration) Actuator Board Pin Positions with
Thermal Sensors
Connector From/To Harness PN Pin
# Function Voltage Wire Color
1 Ret + (Open) 24VDC Black
2 Ret – (Closed) 24VDC Red
3 Ret Position Purple
J1 FV Return
Actuator N/A
4 Ground White
1 Ground White
FV AIF RTD 2 FV - Temp Red
3 Ground White
DV AIF RTD 4 DV - Temp Red
5 FV - Top In 16VDC Black
6 FV- Top Out 16VDC Red
7 DV-Top In 16VDC White
O/Flow Sensor
& Fill Sensor 8 DV- Top Out Green
9 DV – Press Sw (Gas)
Pressure Switch
(Gas) 10 FV – Press Sw (Gas)
11 Locator Vat #5
12 Locator Vat #4
13 Locator Vat #3
14 Locator Vat #2
Locator Pin
15 Locator Vat #1
Black
J2
Locator
8074551 (FV)
8074550 (DV)
16 Locator Signal Black
1 Ret + (Open) 24VDC Black
2 Ret – (Closed) 24VDC Red
3 Ret Position Purple
J3 DV Return
Actuator N/A
4 Ground White
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J4 MIB J2 or
AIF J5
8074547
AIF Board
Communication
and Power
6 Ground White
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J5 AIF J4 or
ATO J10
8074547
AIF Board
Communication
and Power
6 Ground White
1 Drain + (Open) 24VDC Black
2 Drain – (Closed) 24VDC Red
3 Drain Position Purple
J6 FV Drain N/A
4 Ground White
1 Drain + (Open) 24VDC Black
2 Drain – (Closed) 24VDC Red
3 Drain Position Purple
J7 DV Drain N/A
4 Ground White
16

1.3.3 AIF (Auto Intermittent Filtration) Actuator Board Pin Positions with RTD
Sensor
Connector From/To Harness PN Pin
# Function Voltage Wire Color
1 Ret + (Open) 24VDC Black
2 Ret – (Closed) 24VDC Red
3 Ret Position Purple
J1 FV Return N/A
4 Ground White
1 Ground White
FV AIF RTD 2 FV - Temp Red
3 Ground White
DV AIF RTD 4 DV - Temp Red
5
6
7
8
9 DV – Press Sw (Gas)
Pressure Switch
(Gas) 10 FV – Press Sw (Gas)
11 Locator Vat #5
12 Locator Vat #4
13 Locator Vat #3
14 Locator Vat #2
Locator Pin
15 Locator Vat #1
Black
J2
Locator
8074551 (FV)
8074550 (DV)
16 Locator Signal Black
1 Ret + (Open) 24VDC Black
2 Ret – (Closed) 24VDC Red
3 Ret Position Purple
J3 DV Return N/A
4 Ground White
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J4 MIB J2 or
AIF J5
8074547
AIF Board
Communication
and Power
6 Ground White
1 Ground Black
2 CAN Lo Red
3 CAN Hi White
4 5VDC+ 5VDC Black
5 24VDC 24VDC Red
J5 AIF J4 or
ATO J10
8074547
AIF Board
Communication
and Power
6 Ground White
1 Drain + (Open) 24VDC Black
2 Drain – (Closed) 24VDC Red
3 Drain Position Purple
J6 FV Drain N/A
4 Ground White
1 Drain + (Open) 24VDC Black
2 Drain – (Closed) 24VDC Red
3 Drain Position Purple
J7 DV Drain N/A
4 Ground White
17

1.3.4 Replacing an AIF (Automatic Intermittent Filtration) board
Disconnect the fryer from the electrical power supply. Locate the AIF board to be replaced
under a frypot. Mark and unplug the harnesses. The AIF board assembly is held in place with
one screw in the front of the assembly (see Figure 12). Remove the screw and the front of the
assembly drops down (see Figure 13) and the back tab slides out of the bracket attached to the
frypot (see Figure 14). Reverse steps to reassemble, ensuring that the new AIF assembly slides
into the slot in the rear of the bracket.
Figure 12 Figure 13 Figure 14
1.3.5 Replacing an Actuator
Disconnect the fryer from the electrical power supply. Locate the actuator to be replaced under a
frypot and mark and unplug the actuator. The actuators are held in place by two clevis pins that
are held in by cotter ring pins (see Figure 15). Remove both clevis pins and remove the actuator.
Attach the new actuator with the rear clevis pin and cotter ring pin first (see Figure 16). With the
actuator attached with the rear clevis pin only, adjust the new actuator by rotating the shaft until
the holes of the actuator and valve plate are aligned. Rotating the shaft clockwise, adjusts it
outward. While rotating it counterclockwise adjusts the shaft inward. Insert the clevis pin and
the cotter ring pin to secure. If a return valve was replaced, filter a different vat of oil. If bubbles
appear in the vat where the actuator was replaced, further adjustment is necessary. Take out the
pins and adjust the valve until no bubbles are present in the vat. Reinsert the pins to secure the
actuator.
Figure 15 Figure 16
18

1.4 M2007 Computer Filtration Service Procedures
1.4.1 M2007 Computer Troubleshooting
Problem Probable Causes Corrective Action
A. Computer not turned on. A. Press the ON/OFF switch to turn
the computer on.
B. No power to the fryer.
B. This fryer has two cords: a
computer power cord and a main
power cord. If the computer
cord is not plugged in, the
computer will not activate.
Verify computer power cord is
plugged in and that circuit
breaker is not tripped.
C. Computer has failed.
C. Swap the computer with a
computer known to be good. If
computer functions, replace the
computer.
D. Damaged computer wiring
harness.
D. Swap with a harness known to
b
e good. If computer functions,
replace the harness.
No Display on
Computer.
E. Power supply component or
interface board has failed.
E. If any component in the power
supply system (including the
transformer and interface board)
fail, power will not be supplied
to the computer and it will not
function.
Computer locks up. Computer error. Power cycle the computer using the
master switch on the component
box next to the fuse.
M2007 display
shows filter
busy.
Another filtration cycle is still in
process.
A. Wait until the previous
filtration cycle ends or an error
is cleared to start another
filtration cycle.
B. Press reset button and wait at
least 60 seconds. Computer
should clear and return to
normal operation once
complete.
M2007 display
shows REMOVE
DISCARD.
In non-dedicated mode a product is
dropped that has a different setpoint
than the current vat temperature.
Remove and discard product.
Press and hold the cook button for
three seconds under the display
with the error to remove the error.
Reset the setpoint of the vat before
trying to cook product.
19

Problem Probable Causes Corrective Action
M2007 display
shows chk pan.
A. Filter pan is not fully set into fryer.
B. Missing filter pan magnet.
C. Defective filter pan switch.
A. Pull filter pan out and fully
reinsert into fryer.
B. Ensure the filter pan magnet is
in place and if missing replace.
C. If the filter pan magnet is fully
against the switch and
computer continues to display
chk pan, switch is
possibly defective.
M2007 display is in
wrong temperature
scale (Fahrenheit or
Celsius).
Incorrect display option programmed.
M2007 computers may be
programmed to display in either
Fahrenheit or Celsius. Press and
hold 3and 4simultaneously until
code appears. Enter 1658.
The computer displays OFF. This
toggles the temperature from F° to
C° or vice versa. Turn the
computer on to check temperature
and see the temperature scale. If
the desired scale is not displayed,
repeat.
M2007 display
shows hot-hi-1.
Frypot temperature is more than
410ºF (210ºC) or, in CE countries,
395ºF (202ºC).
This in an indication of a
malfunction in the temperature
control circuitry, including a
failure of the high-limit thermostat.
M2007 display
shows HI-LIMIT. Computer in high-limit test mode.
This is displayed only during a test
of the high-limit circuit and
indicates that the high-limit has
opened properly.
M2007 display
shows low temp.Frypot temperature is between 180°F
(82°C) and 315°F (157°C).
This display is normal when the
fryer is first turned on while in the
melt cycle mode. To bypass the
melt cycle press and hold a #2
product button under the LCD
display until a chirp is heard. The
alarm will chirp and the computer
displays EXIT MELT alternating
with YES NO. Press the #1 YES
button to exit melt. It may appear
for a short while if a large batch of
frozen product is added to the
frypot. If the display never goes
out, the fryer is not heating.
20