Pitco E7 Guide

There'sAlwaysSomethingCooking!
Service, Parts, and Schematics
For Electric Fryers With Options
Including Options, Built-In and UFM (Spacefighter)
Filter Systems
Covering Models
E7, E7B, E12, E14, E14B, E14X, E18, & E18B
SERVICESECTION
Pitco Frialator, Inc., P.O. Box 501, Concord, NH 03302-0501 • 509 Route 3A, Bow, NH 03304
[phone] • [phone] • FAX [phone]
A BLODGETT Company

MTS # PF05-01 Pitco Frialator #L20-055 Revision 11 Rev. Date 07/18/94

TO THE PURCHASER, OWNER AND STORE MANAGER
Please review these warnings prior to posting them in a prominent location for reference.
L20-303 Rev 1. (05/11)
2
WARNING
DO NOT store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance. WARNING
Improper installation, alteration, service or
maintenance can cause property damage, injury or
death. Read the installation, operating and
maintenance instructions thoroughly before installing
or servicing this appliance.
WARNING
Installation, maintenance and repairs should be
performed by a Pitco Authorized Service and Parts
(ASAP) company technician or other qualified
personnel. Installation, maintenance or repairs by
unauthorized and unqualified personnel will void the
warranty. WARNING
Installation and all connections must be made
according to national and local regulations and codes
in force. WARNING
A country approved all pole circuit breaker with a
minimum open contact gap of 3mm must be used for
proper installation. (CE countries)
WARNING
During the warranty period if a customer elects to use a
non-original part or modifies an original part purchased
from Pitco and/or its Authorized Service and Parts
(ASAP) companies, this warranty will be void. In
addition, Pitco and its affiliates will not be liable for any
claims, damages or expenses incurred by the customer
which arises directly or indirectly, in whole or in part,
due to the installation of any modified part and/or
received from an unauthorized service center.
WARNING
This appliance, when installed, must be electrically
grounded in accordance with local codes, or in the
absence of local codes, with the National Electrical
Code, ANSI/NFPA 70, or the Canadian Electrical Code,
CSA C22.2, as applicable.
WARNING
DO NOT alter or remove structural material on the
appliance to facilitate storage or for any other reason.
WARNING
This appliance is intended for professional use only
and should be operated by fully trained and qualified
personnel. WARNING
DO NOT use the electrical cord as a leash to move the
appliance. Series injury and appliance damage can
occur. WARNING
If the supplied power cord or receptacle is damaged, it
must be replaced by a Pitco Authorized Service and
Parts (ASAP) company technician, or a similarly
qualified person in order to avoid a hazard.
WARNING
The power supply must be disconnected before
servicing, maintaining or cleaning this appliance.
WARNING
The appliance is NOT jet stream approved. DO NOT
clean the appliance with a water jet.
WARNING
DO NOT attempt to move this appliance or transfer hot
liquids from one container to another when the unit is
at operating temperature or filled with hot liquids.
Serious personal injury could result if skin comes in
contact with the hot surfaces or liquids.
WARNING
DO NOT sit or stand on this appliance. The appliance’s
top panel, filter pan, filter carriage, pan cover is not a
step. Serious injury could result from slipping, falling
or contact with hot liquids.
WARNING
NEVER use the appliance as a step for cleaning or
accessing the ventilation hood. Serious injury could
result from slips, trips or from contacting hot liquids.
WARNING
The filter pan should be dry and free of water droplets
prior to use. Serious injury could result from hot steam
vapors when hot oil/shortening mixes with water.
WARNING
DO NOT overfill filter pan with hot oil/shortening. Do
not leave appliance unattended while draining or
refilling with oil/shortening. Over filling the appliance
can cause serious injuries and damage the appliance.
WARNING
The contents of the crumb catch and/or filter pan of
any filter system must be emptied into a fireproof
container at the end of each day. Some food particles
can spontaneously combust if left soaking in certain
types of oil or shortening.
WARNING
Completely shut the appliance down when the
oil/shortening is being drained from the appliance. This
will prevent the appliance from heating up during the
draining and filling process. Serious injury and
appliance damage can occur.
WARNING
This appliance is intended for indoor use only.
WARNING
DO NOT operate appliance unless all panels and
access covers are attached correctly.
WARNING
It is recommended that this appliance be inspected by
a qualified service technician for proper performance
and operation on a yearly basis
WARNING
This appliance is designed to operate on a specific
voltage. This information can be found on the data
plate located on the rear of the appliance
.

Table of Contents (Service)..........................................................................................................i-ii
List of Figures .......................................................................................................................... ii
Chapter 4: Service .....................................................................................................................4-1
4.1 REPLACEMENT PROCEDURES ...........................................................................4-1
4.1.1 Heating Element Removal and Replacement ......................................................4-1
4.1.2 Backup Thermostat Replacement - Computer Models Only...............................4-2
4.1.3 Calibrating the Thermostat - Computer Models Only.........................................4-3
4.2 TESTING CONTACTORS (RELAYS)....................................................................4-3
4.3 TESTING HEATING ELEMENTS .......................................................................... 4-4
4.4 TESTING THE TEMPERATURE SETTING POTENTIOMETERS......................4-4
4.5 TESTING THE TEMPERATURE CONTROL MODULES ...................................4-4
4.6 TESTING THE TEMPERATURE PROBE.............................................................. 4-5
4.7 TESTING THE HEATING ELEMENT INTERLOCK............................................4-5
4.8 TROUBLESHOOTING FRYERS WITHOUT COMPUTERS................................4-7
4.9 TROUBLESHOOTING FRYERS WITH COMPUTERS...................................... 4-14
4.10 TROUBLESHOOTING BASKET LIFT PROBLEMS ..........................................4-16
4.11 TROUBLESHOOTING BUILT-IN FILTER UNITS............................................. 4-18
4.12 TROUBLESHOOTING UFM FILTER UNITS .....................................................4-21
Chapter 5: Parts .......................................................................................................................5-1
Fig. No.
5-1 Outside View ............................................................................................................. 5-2
5-2 Entrance Box .............................................................................................................5-3
5-3 Inside Fryer Tank Components .................................................................................5-4
5-4 Frame-Cabinet / Electrical Assemblies With Components .......................................5-7
5-5 UFM Filter, Frame/Electrical Assembly ................................................................... 5-9
5-6 UFM Pilter, Pick-Up/Pan Assembly .......................................................................5-11
5-7 UFM Filter, Motor / Return Assembly....................................................................5-13
5-8 Built-In Filter Pan With Components......................................................................5-15
5-9 Filter Piping With Components............................................................................... 5-17
5-10 Built-In Filter With Accessories.............................................................................. 5-19
ALPHABETICAL PART LIST ..............................................................................5-20
NUMERICAL PART LIST..................................................................................... 5-24
Table of Contents (Service)
Section Title Page
i

Table of Contents (Service) Cont.
Section Title Page
Chapter 6: Schematics..............................................................................................................6-1
List of Tables and Figures
Table No. Title Page
5-1 Frame-Cabinet / Electrical Assemblies With Components .......................................5-6
5-2 UFM Filter, Frame/Electrical Assembly ................................................................... 5-8
5-3 UFM Pilter, Pick-Up/Pan Assembly .......................................................................5-10
5-4 UFM Filter, Motor / Return Assembly....................................................................5-12
5-5 Built-In Filter Pan With Components......................................................................5-14
5-6 Built-In Filter Piping With Components .................................................................5-16
5-7 Built-In Filter With Accessories.............................................................................. 5-18
Figure No. Title Page
5-1 Outside View ............................................................................................................. 5-2
5-2 Entrance Box .............................................................................................................5-3
5-3 Inside Fryer Tank Components .................................................................................5-4
5-4 Frame-Cabinet / Electrical Assemblies With Components .......................................5-7
5-5 UFM Filter, Frame/Electrical Assembly ................................................................... 5-9
5-6 UFM Pilter, Pick-Up/Pan Assembly .......................................................................5-11
5-7 UFM Filter, Motor / Return Assembly....................................................................5-13
5-8 Built-In Filter Pan With Components......................................................................5-15
5-9 Filter Piping With Components............................................................................... 5-17
5-10 Built-In Filter With Accessories.............................................................................. 5-19
ii

4-1
Chapter 4: Service
Thischapter providesthequalified technicianwith thereplacement andtroubleshooting procedures
necessary to service the Pitco fryer.
4.1 REPLACEMENT PROCEDURES
These procedures are provided to the qualified technician as a guide to removal and replacement of
variousfryercomponents. Ifatestisrequiredtoverifycomponentoperationafterinstallation,itwill
be referenced.
WARNING
To prevent burns, always ensure the fryer is completely SHUT DOWN and
COOLED down before working on the fryer. Do not break any fryer gas
connections while the unit is connected to a gas supply line.
WARNING
The power supply must be disconnected before servicing or cleaning the
appliance.
4.1.1 Heating Element Removal and Replacement
Replacing a heating element is a complex and time consuming procedure. Ensure that you have
tested the heating elements to determine that the element is bad and not something else.
a. Movethefryerouttogainaccesstotherearpanels. Removetheuppersmallaccesscover
and the large lower access cover.
b. Theterminalblockfortheheatingelementsislocatedbehindtheloweraccessplate. Tag
the connections with wire markers for easy reinstallation, and remove the wires. The
temperatureprobewiresarenotconnectedthroughtheterminalboard. Todisconnectthe
temperature probe, remove the small access plate on top of the pivot box (plate opposite
High Limit switch). The connector for the probe is inside the pivot box. Disconnect the
probe at this connector and gently pull the wire out of the pivot box.
c. Disconnect the spring assembly from the pivot box by raising the elements and holding
them in place with a board across the tank. Do not use the element bracket to hold the
elements up.
d. Next remove the pivot box assembly by removing the screws that attach the pivot box
hingestothefryer. Theheatingelementswillneedtoberaisedtogainaccesstothescrew
heads. Support the heating element assembly before removing the screws. Removing
the hinge screws frees the heating element assembly from the fryer.

4-2
e. Once free of the fryer, set the element assembly aside. Remove the access plate on the
back of the pivot box to gain access to the heating element connectors. Disconnect the
wire for the defective element.
f. Loosenthenutsthatattachtheheatingelementtothepivotbox. Slidetheheatingelement
out of the pivot box.
g. Install the new heating element by reversing this procedure.
4.1.2 Backup Thermostat Replacement - Computer Models Only
Only fryers that have computer controls have this backup thermostat. If your fryer does not have
a computer but does have a thermostat behind the door, this is a thermostat behind the door model.
That means that the knob behind the door controls the solid state temperature module behind the
fryer'scontrolpanel(frontbezel). Thebackupthermostatincludesthetemperatureadjustmentknob,
temperature sensor inside the fryer tank, and connecting capillary tubing. The high limit controls
also has a temperature sensor in the fryer tank, so ensure you are removing the correct temperature
sensor.
CAUTION
Thermostat capillary tubing is very delicate. Be VERY CAREFUL when
working with the capillary tubing. If the tubing is kinked or broken the
thermostat is no longer usable.
a. Draintheoilfromthefryer. Thethermostatprobe(heatsensor)isclampedto the heating
elementassemblyinsidethe tank. Unscrewandremovethetwo screwsinthethermostat
probe clamp.
b. Remove the thermostat probe from the clamp and straighten the capillary tubing.
Unscrew the small hex nut inside the cabinet under the tank for the thermostat control.
c. Unscrew the large connector nut from the fryer tank and pull the thermostat probe and
capillary tubes through the opening.
d. Pull the knob off of the thermostat. Remove the entrance box cover to gain access to the
thermostat.
e. Mark and disconnect he wires from the thermostat terminals.
f. Removethetwoscrewsthatholdthethermostattotheinsideoftheentrancebox. Remove
the defective thermostat control unit from the fryer.
g. Install the new thermostat in reverse order. Remember to be careful with the capillary
tubes.

4-3
h. Usepipe jointcompound onthe largefitting beforeinstalling toprevent oilleakage. DO
NOT use joint compound on the small nut.
i. Perform the calibration procedures detailed in section 1.5.3.
4.1.3 Calibrating the Thermostat - Computer Models Only
To calibrate this thermostat the dial must be removed from the shaft. The adjustment for the
thermostat is inside the dial shaft.
a. To calibrate the thermostat you must first cause the computer to switch control to the
backupthermostat. Todothis,removethecomputer fromthefrontpanelanddisconnect
the connector from the computer. The transfer relay will de-energize and temperature
control will shift to the backup thermostat.
b. Place the tip of a high accuracy thermometer in the shortening approximately 1" above
the temperature sensor.
c. Set the thermostat dial to 325°F and turn the fryer on.
d. Remove the thermostat dial by pulling the knob straight out. DO NOT rotate the dial.
e. Hold the outside of the shaft so it does not move. Use the tip of a small, flat tip screw
driver to scrape away the sealing compound from the adjustment screw. Turn the
adjustment screw clockwise to lower the temperature setting, and counterclockwise to
raisethetemperature. Onequarterturnwillchangethetemperatureapproximately25°F.
f. Turn the adjustment until the heating elements turn off at 325°F. Replace the knob and
allow the fryer to cycle 4 to 6 times. Check the temperature of the thermometer against
the thermostat dial, if it is greater than 5°F repeat the calibration procedure.
g. When the calibration is correct, remove the thermometer.
4.2 TESTING CONTACTORS (RELAYS)
Contactorsandrelaysuseacontrolvoltagetoenergizetheelectromagnetandcloseasetofcontacts.
Thecontrolvoltageisappliedtoasolenoid-typecoil.Whenmeasuringacoil'sresistance,ensurethat
you have disconnected it from the fryer's electrical system. This will ensure that you are measuring
thecoil'sresistanceandnotaportionofthefryer'swiring. WhenmeasuredwithanOHMmeterthese
coils should have a very low resistance, less than 100 ohms. Measure each of the contactors that are
suspect. If any relay or contactor indicates an open circuit or high amount of resistance, replace the
coil.

4-4
4.3 TESTING HEATING ELEMENTS
To check a heating element first place the OFF-ON-START switch in OFF. Check the elements by
performing the following:
a. The terminal block that connects the heating elements to the fryer is located behind the
large rear access panel. Move the fryer out and remove the access panel.
b. Using an OHM meter check continuity from one end of the element to the other. The
readingshouldbeverylow(afewohms). Iftheelementindicatesanopencircuit,replace
the element.
c. Next check from the hot side of the element to ground. It should be infinite, if it is not
replace the element.
4.4 TESTING THE TEMPERATURE SETTING POTENTIOMETERS
The temperature setting potentiometer is a variable resistors. To test the potentiometer ensure that
the OFF-ON-START switch is OFF and perform the following:
a. For thermostat knobs mounted on the front of the fryer, remove the front bezel to gain
access to the back of the potentiometer. If the fryer has the thermostat knob mounted
behind the door (in the entrance box), remove the entrance box cover to gain access to
the back of the potentiometer.
b. Disconnect P10 from J10.
c. Connect an ohm-meter to pin 3 (yellow wire) and pin 1 (violet wire) and rotate the
temperature control knob. The resistance should vary from 0 to 900 ohms.
b. Connect the ohm-meter between pin 3 (yellow wire) and pin 5 (orange wire) and rotate
the knob. The resistance should again vary from 0 to 900 ohms. If the resistance is not
within the ranges specified replace the temperature setting potentiometer.
4.5 TESTING THE TEMPERATURE CONTROL MODULES
Thetemperaturecontrolmodulereceives24VACwhenthe OFF-ON-STARTswitchisON. Totest
the temperature control module perform the following:
a. The temperature control module is located behind the front bezel. Remove the two screws
that hold the bezel in place and move out of the way.
b. Place the OFF-ON-START switch in ON and the Melt switch in OFF. This will apply 24
VAC to pin 1 (black wire) with pin 3 as the common (white wire) of the temperature control
module.

4-5
c. Set the temperature setting potentiometer to a temperature above the shortening's current
temperature. This will cause the temperature control module to close and pass 24 VAC to
pin 12 (gray wire) of the control module.
d. Check the temperature probe as described in section 4.6.
e. If the temperature probe test passes and there is not 24 VDC present on pin 12 of the control
module, replace the temperature control module.
4.6 TESTING THE TEMPERATURE PROBE
WARNING
All power supplies must be disconnected before servicing the appliances.
Someapplianceshavemorethanonepowersupply. MakesuretheyareALL
disconnected.
The temperature probe is a special type of resistor called a thermistor. Check the temperature probe
by performing the following:
a. Gain access to the temperature probe connection by removing the front panel. Disconnect
P10 and check the resistance of the probe at pins 2 & 4 of P10.
b. Place the OFF-ON-START switch in OFF. Use an ohm-meter to measure the resistance
across the probe. It should be about 100K ohms at room temperature (72°F, 22°C). If the
probe indicates an open or more than 200 ohms away from 100K ohms, replace the probe.
c. Re-install the probe wires and turn on the fryer. Start the fryer and raise the shortening
temperature to normal cooking temperature, approximately 350°F.
d. Unplug the temperature probe and measure the resistance again. It should read approxi-
mately 923.8 ohms ±10 ohms. If the resistance is different by more than 10 ohms, replace
the temperature probe.
4.7 TESTING THE HEATING ELEMENT INTERLOCK
The heating elements are protected from accidental over heating, due to lifting them out of the oil
while unit is ON, by an interlock limit switch. The switch is located on the right side (opposite the
High Limit switch) of the heating element pivot box.
a. This test requires that you gain access to the back of the interlock switch. Remove the four
screwsfrom thesmall accessplate onthe top,right ofthe pivotbox. Gently movethe wiring
harness to the side to expose the wiring terminal of the interlock switch.

4-6
b. Connect an ohm-meteracross the switch terminalsto measure the resistance acrossthe limit
switch connection.
c. When the elements are down in the tank the interlock switch is closed and the resistance
across the switch will be zero.
d. Lift the element rack up while continuing to measure the resistance across the switch. The
rackonlyneedsto beliftedashortdistance toopentheswitch. Aclick shouldbeheardwhen
the switch opens. The resistance will go up significantly when the switch opens. The
resistance will not be infinite unless the switch wires are disconnected. If there is any doubt
aboutthe resistance,remove thewires and checkthe resistance. Withthe wiresremoved the
resistance will be infinite.

4-7
4.8 TROUBLESHOOTING FRYERS WITHOUT COMPUTERS
A
YES
NO Refer to Chapter 2 for
proper filling and
operation of the fryer.
Is the fryer
filled with oil?
NO
Is the fire
protection tie in
system closed?
YES
Ensure that the fire
protection system is closed
or that the fire protection
tie in
p
oint is closed.
NO
YES Determine reason for
tripping. Reset the
circuit breaker.
Is the service
panel circuit
breaker tripped?
YES
NO
Connect fryer to building
power supply as described in
Chapter 1.
NO Is the Fryer
connected to building
power supply?
Does the
POWER ON
indicator light?
YES
Fryer does not
operate properly!
YES
NO Ensure the the heating
elements are down. Check
the interlock switch per 4.7
and replace if necessary.
Are the heating
elements down and is
the interlock
working?
YES
NO
Is the control fuse
(F1) blown?
YES
Determine the cause for
blowing. Replace the fuse.
(Refer to 3.6)
Test the ON/OFF/TEST Switch
and replace if necessary

4-8
C
YES
Reset switch and
check trip setting.
NO
Is the High Limit
switch open?
B
YES
NO
Does the
HEATING light
come on?
YES
NO
NO
Ensure that the heating
elements are down. Check
the interlock switch per 4.7
and replace if necessary.
Are the heating
elements down and is
the interlock
working?
Does the fryer
heat up?
A
Replace the
temperature
probe.
NO
YES
Test the temperature
probe as described in 4.6.
Is the temperature probe
defective?
YES
Verify continuity of the leads
which provide 24 VAC power,
and the potentiometer and
p
robe si
g
nals to the module.
YES
Replace the
module.
Test the
temperature control
module as described in
4.5. Is the module
defective?
NO
YES
Replace the
potentiometer
Test the
temperature set
potentiometer as described in
4.4. Is the potentionmeter
defective?
NO

4-9
D
YES
B
Check contactors K7 thru K10. Check
wiring for loose connections. Check
continuity between the grey lead on
each contactor and the grey lead to the
HEATING light.
Replace the
defective heating
elements
NO
YES
Check heating
elements as
described in 4.3.
Are they good?
YES
Replace the fuse(s)
and determine the
cause for blowing.
NO
Are heating
element fuses
blown?
YES
C
Replace the
temperature
probe.
YES
Replace the module.
Test the
temperature control
module as described
in 4.5. Is the module
defective?
NO
Replace the
potentiometer.
NO
Test the temperature
set potentiometer
as described in 4.4. Is
the potentionmeter
defective?
YES
NO
Test the temperature
probe as described in 4.6.
Is the temperature probe
defective?
NO
Does HEATING
light go out when
thermostat is set above
oil temperature?
Verify continuity of the leads
which provide 24 VAC power,
and the potentiometer and probe
signals to the module.
YES

4-10
NO
NO
YES Check the setting and
calibration of the thermostat.
Is the thermostat
set too high?
YES Perform a through cleaning of
the fryer as described in 3.2.
Are the heating
elements dirty?
NO
NO
E
NO
YES Gently move the capillary tube
away from the heating elements
Is High Limit
capillary tube
touching the heating
elements?
NO
YES Ensure that shortening level is filled
to the level mark.
Is shortening
level too low?
YES Ensure that shortening is packed
tightly around heating elements!
Make sure that the Melt Cycle
switch is set to MELT ON.
Is solid
shortening being
melted?
YES
Does HIGH LIMIT
switch trip during normal
operation?
NO
D
If the High Limit switch can
not be reset of continues to
trip early replace the switch.
YES
Replace the
module.
Test the
temperature control
module as described
in 4.5. Is the module
defective?
NO

4-11
F
Test the temperature probe as
described in 4.6. Replace
temperature probe if defective.
NO
NO
Check the setting and
calibration of the thermostat.
NO
YES
Is the thermostat
set too high?
YES Ensure that shortening level is filled
to the level mark.
YES Is the shortening
level too low?
Does the
shortening get too
hot?
E
Test the temperature probe as
described in 4.6. Replace the
temperature probe if defective.
Replace the defective
heating elements
NO
YES
Check heating
elements as
described in 4.3. Are
they all good?
NO
Check the setting and
calibration of the thermostat.
YES YES
Is the thermostat
set too low?
Does the
shortening not get
hot enough?
NO

4-12
G
Replace the
temperature
probe.
YES Replace the
potentiometer.
NO
Test the temperature
set potentiometer as
described in 4.4. Is the
potentionmeter defective?
YES
Test the temperature
probe as described in 4.6.
Is the temperature probe
defective?
F
NO
YES
Does the fryer
heat intermittently?
NO
NO
YES Replace the
temperature control
module.
Check heating elements as
described in 4.3. Replace
heating elements if necessary.
Test the
temperature control
module as described in
4.5. Is the module
defective?
NO
NO
Fryer is functioning
properly.
Correct the installation.
NO
Perform a weekly cleaning
of the fryer (3.2)
Are the heating
elements clean?
YES
YES
Is the fryer
connected to the
proper voltage supply and
is it connected
properly?
Does the fryer
heat slowly?
YES

4-13
Move or tighten the
probe.
NO
YES
Is the
temperature probe loose
or in the wrong
location?
Check contactors K7 thru K10. Check
wiring for loose connections. Check
Continuity between the grey lead on
each contactor and the grey lead to
the HEATING light.
NO
Replace the defective
heating elements
NO
YES
Check heating
elements as described
in 4.3. Are they all
good?
G
Replace the blown fuses.
Are any of the
heating elements
fuses blown?
YES

4-14
4.9 TROUBLESHOOTING FRYERS WITH COMPUTERS
Fryer power is ON, but
the fryer is not functioning
properly.
Replace F1.
Close the breaker.
NO
NO
YES
Is the
computer panel
lit?
Is the
service panel circuit
breaker for the fryer
ON?
Is control fuse
(F1) open
YES YES
Replace F3.
Is computer
supply fuse (F3)
open
YES
NO
NO
Check interconnecting wire between
computer and computer supply fuse (F3).
A
NOYES
Ensure that
the heating
elements are
seated in the
tank.
Are the
heating elements
properly seated in
the fryer tank?
Does the
computer display
indicate LOW after
allowing for sufficient time
for the fryer to
warm up?
Has temperature
control transfered to the
back-up thermostat? This can
be checked by moving the back-up
thermostat and watching the
heating light cycle
on and off.
NO
Temperature control transfers
automatically to the Back-Up
thermostat when there is a problem
with the computer or power is lost to
the transfer relay.
YES
YES
YES
NO
Reset the High
Limit Switch. If
the switch will
not reset,
replace the
switch
Is the High Limit
switch tripped?
CB

4-15
YES
Check
interconnecting
wire.
NO Replace the
probe.
Computer
functioning properly
for temperature
control.
NO
YES
Does the
computer display
indicate
PROB?
Is the probe
resistance correct?
Refer to 4.6 for probe
test procedure.
Is the oil
temperature less
than 70°F?
Raise the temperature of
the oil using the backup
thermostat. The problem
should correct itself.
YES
NO
Perform element
resistance check
asdescribed in 4-3.
NO
NO
YES
Check the
contactors as
described in 4.2. Are
the contactors
defective?
Replace the
defective
contactor.
YES Determine why
fuses blew and
replace the blown
fuses.
Check
element fuses.
Are any of the
fuses open?
A CB
But Blanch Mode
switch in BLANCH
OFF.
NO
YES
If the fyer has a
Blanch Mode Swich
ensure that it is in BLANCH
OFF. Is the switch in
BLANCH OFF?
Check
interconnecting wire.