Please review these warnings prior to posting them in a prominent location for reference.
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.
The appliance is NOT jet stream approved. DO NOT
clean the appliance with a water jet.
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.
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.
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.
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.
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.
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.
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.
This appliance is intended for indoor use only.
DO NOT operate appliance unless all panels and
access covers are attached correctly.
It is recommended that this appliance be inspected by
a qualified service technician for proper performance
and operation on a yearly basis
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
.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
2
L20-303 Rev 2. (10/12)
Table of Contents
How Does It Work? ........................................................... 4
The SEH 50 fryer components function in specific
order of operation. Knowing and understanding the
sequence of fryer and components operation will enable
you to diagnose equipment failure more accurately.
Heating System
Power to the machine is turned ON:
•If Fuse F1 on the Relay board is good, the A.C.
light will illuminate. The computer is supplied with
24VAC and, if the drain valve handle is closed, the
proximity switch will supply 24 VAC to the DVI
(drain valve interlock) Input at the computer.
•The computer is turned ON:
•The side on relay will be energized, closing the
circuit and the S.O. light on the Relay Board will
illuminate. If the hi limit is NOT tripped the safety
(side on) contactor will energize.
•Computer calls for heat:
•The 24 VDC "heat demand" relay will energize
supplying the heat demand contactor with 24 VAC
and the H.D. light on the Relay Board will
illuminate. This will also supply the computer with a
heat feedback signal.
•The return piping system may be provided with
optional heat tape to prevent solidification of solid
shortening. The heat tape is low wattage and is on
constantly to maintain liquid shortening in the line.
Optional Basket Lift:
•The basket lift is a self contained unit that requires
a 120, 208 or 240V supply. With most fryer configurations, the power is supplied from the entrance
box at the back of the fryer but some cofigurations
will require power direct from a wall outlet. When
power is supplied to basket lift assembly, the baskets will lift to the up position. The baskets will
lower with a 24 VDC output from the controller.
Chapter 2: COMPONENT
TROUBLESHOOTING:
Hi Limit System:
• If the hi limit trips, it causes the side on and heat
demand contactors to lose 24VAC supply and the
heat feed back loses 24VAC. The computer will
display IGNITION FAILURE or HEAT FAIL.
After the hi limit resets (unit cools to 375°F + 20°F)
the computer will have to be turned off and back
on for the unit to heat.
Filter System:
•Opening the RED return valve handle will close the
proximity switch causing the "pump run" relay to
be energized. The pump motor will begin to run.
Closing the return valve handle will de-energize the
relay and the pump motor will stop running.
•The pump system is equipped with a circuit breaker
which will de-energize the system and the heat tape
in the event of overcurrent. The circuit breaker
switch must be in the ON position for the pump and
heat tape to operate.
Probe:
The resistance of the probe will change as the temperature changes. The resistance will decrease as the
temperature rises. The lower the temperature the
greater the resistance change will be per degree of temperature change, as the temperature approaches the
working range of the probe, the resistance change will
become more linear.
4L22-238 Rev 2 (10/12)
If the probe is suspect, check its resistance and the oil/air
temperature at which it was taken. Compare these values
on the chart below.
If the probe returns an open circuit or 0 Ohms reading it
should be replaced. If the resistance varies more than 30
Ohms when being checked between 325-375°F the probe
will give a false temperature reading on the computer and
should be calibrated (up to 10°F) or replaced. However,
it will continue to operate at a slightly higher or lower temperature.
Allow the oil to cool and check the probe resistance at a
lower temperature. As can be seen from the chart a greater
variation can be tolerated at a lower temperature.
Heat Demand Contactor:
The heat demand contactor has a 24VAC coil and will
energize when the correct voltage is supplied to the coil.
When energized, the contacts will close, allowing current
to flow through the elements. The coil resistance is 192
ohms out of circuit.
Hi Limit:
The hi - limit switch is a normally closed switch until the
temperature at the hi-limit bulb reaches 425°F ± 20°F.
WARNING!
This test should be performed by a qualified
technician only! Monitor the fryer closely. This
test will cause the oil to heat past the normal
operating temperature and can cause damage to
the machine and its operator if care is not taken.
WARNING!
This test will cause the elements to heat
continuously. Remove test resistor when test is
complete. Leaving the test resistor in the fryer
could cause damage to equipment and/or personal
injury.
To test the hi-limit, use a 2kΩ - 5kΩ resistor to simulate
a 230°F - 275°F temperature. This will cause the
elements to heat continuously until the hi-limit trips or the
fryer is turned off.
•If the fryer is equipped with a computer or digitalcontroller, plug the resistor in at connector J41
behind the front panel.
•If the fryer is equipped with a solid statecontroller behind the door, plug the resistor in at
connector J43 behind the front panel.
If the switch does not trip between the prescribed
limits it is defective and should be replaced. Once
tripped, the switch cannot be reset until the oil has
cooled to approximately 375°F + 20°F. If the
switch does not reset after oil has cooled it is
defective.
Once the oil has cooled the hi-limit reset button
must be pressed to reset the hi-limit relay on CE
and export units only.
Drain Valve & Return Valve Switches:
These switches are a magnetically operated
proximity switches. When the Drain Valve handle is
moved to the open position, the Actuator will move
away from the switch causing the switch to open.
When the Drain Valve is closed the switch will
close.
Opening the RED return valve handle will close the
proximity switch causing the "pump on" relay to be
energized. The pump will begin to pump. Closing
the return valve handle will de-energize the relay
and the pump will stop pumping. These switches
can also be checked with an Ohm meter. The
normal gap between the Actuator and the Sensor
switch on the valve handle is 1/8" - 1/4" (3 - 6mm).
Transformer:
Transformers are multiple input voltage 24 volt output
voltage and can be checked by reading the input and
output voltages. A quick check for 24VAC can be
done at the relay board behind the computer. The
AC led will be lit if the F1 fuse is good and the board
is receiving 24VAC
Elements:
US
CAN
GB
Each Element has three coils inside it, check all element
5
L22-238 Rev 2 (10/12)
coils out of circuit with an Ohm Meter, the resistance
should correspond to the chart below, if the resistance
varies more than 5 Ohm the element will need to be
changed. Also check for continuity to ground on each
end of the suspect element, there should be no continuity
to ground.
208 volt elements18.5 Ohms
220 volt elements20.7 Ohms
240 volt elements24.6 Ohms
Safety (Side On) Contactor:
Check the coil with an Ohm Meter, the resistance should
be approximately 3 - 6 Ohms out of circuit. If it does not
have this resistance it should be changed.
Relay Board:
Note: J connectors are marked on the relay board.
•With 24 VAC supplied to pin #2 at connector J35 and a
good F1 fuse, the relay board will have a 24 VAC output
at pin #2 on connectors J33 and J34 and the A.C. indicator will be illuminated.
Note: If the fryer is equipped with a computer or
solid state digital, at connection J33 there will be a
jumper from pin #2 to pin #10 to supply 24 VAC to
pin # 2 at connection J31 to supply the controller
with 24VAC.
•When the board receives a 24 VDC side on input at pin
#7 on connectors J31 or J33, the S.O. indicator will illuminate, the side on relay (S.O.) will energize and there
will be a 24 VAC output at pin #4 on connector J32.
•When the board receives a 24 VDC heat demand input
at pin #6 on connectors J31 or J33, the H.D. indicator
will illuminate, the heat demand relay (H.D.) will energize
and there will be continuity between pin #1 and pin #2 at
connector J32.
Computer Control:
Note: All controller test points are at connector P/J1 (clos-
est connector to the controller).
•With 24 VAC supplied to pin #1(24VAC supply) and
pin # 5(24VAC input from DVI), the display should read
"OFF".
•With the controller turned on, there will be a 24 VDC
output at pin #9 (side on).
•When the controller calls for heat, there will be a 24 VDC
output at pin #8 (heat demand) and a 24 VAC input at pin
#6 (heat feed back). If the controller does not receive the
24 VAC input at pin #6 in approximately 90 seconds, the
controller will display "HEAT FAIL" or "IGNITION FAILURE". This would indicate a break in the heat demand or
heat feed back circuit.
1. Check the hi-limit switch (is it open or tripped).
2. Check the ignition module (sensing pilot flame,
locked out, 24 VAC at MV terminal).
3. Check the heat demand relay (H.D.) on the relay
board (is heat demand relay energized, continuity
through COM and NO contacts).
•If display reads "PROBE OP" "OPEN", ohm test the temperature probe. Check the wires and connectors between
the probe and controller for continuity.
•If display reads "SYSTEM" "FAILURE", test the temperature probe and the wires and connectors between the
probe and controller for a short.
•If display reads "DRAINING" "TURN OFF", verify that
the drain valve is closed, check the proximity switch on the
drain valve, turn the fryer off, then turn the fryer on.
Digital Solid State Control:
Note: All controller test points are at connector P/J1 (clos-
est connector to the controller).
•With 24 VAC supplied to pin #1(24VAC supply) and pin
# 5(24VAC input from DVI), the display should read
"OFF".
•With the controller turned on, there will be a 24 VDC
output at pin #9 (side on).
•When the controller calls for heat, the display will read
"HEAt", there will be a 24 VDC output at pin #8 (heat
demand) and a 24 VAC input at pin #6 (heat feed back).
If the controller does not receive the 24 VAC input at pin
#6 in approximately 90 seconds, the controller will display
"HEAt" "FAIL" . This would indicate a break in the heat
demand or heat feed back circuit.
1. Check the hi-limit switch (is it open or tripped).
2. Check the ignition module (sensing pilot flame,
locked out, 24 VAC at MV terminal).
3. Check the heat demand relay (H.D.) on the relay
board (is heat demand relay energized, continuity
through COM and NO contacts).
•If display reads "Prob", ohm test the temperature probe.
Check the wires and connectors between the probe and
controller for continuity.
6L22-238 Rev 2 (10/12)
•If display reads "Prob" "HI", ohm test the temperature
probe and the wires and connectors between the probe
and controller for a short.
•If display reads "drn" "tUrn" "oFF", verify that the drain
valve is closed, check the proximity switch on the drain
valve.
Primary Solid State Control:
Note: All controller test points are at connector P/J3 (the
12 pin connector at the controller).
•24 VAC is supplied to the controller at pin #1(24VAC
supply) and pin # 5 (24 VAC input from DVI),
•With the controller turned on, there will be a 24 VDC
output at pin #9 (side on) and the green indicator will be
illuminated.
•When the controller calls for heat, there will be a 24 VDC
output at pin #8 (heat demand), the yellow indicator on the
left will be illuminated and there will be a 24 VAC input at
pin #6 (heat feed back).
•When the controller receives the 24 VAC input at pin #6,
the yellow indicator on the right will illuminate. If the controller does not receive the 24 VAC input at pin #6, the
indicator will not illuminate. This would indicate a break in
the heat demand or heat feed back circuit.
1. Check the hi-limit switch (is it open or tripped).
2. Check the ignition module (sensing pilot flame,
locked out, 24 VAC at MV terminal).
3. Check the heat demand relay (H.D.) on the relay
board (is heat demand relay energized, continuity
through COM and NO contacts).
•If the green indicator and the yellow indicator on the left
come on and shut off when the controller is turned on, that
indicates an open or shorted probe or wires in between
the probe and the controller.
•If none of the indicators illuminate when the controller is
turned on, verify that the drain valve is closed and that the
magnetic proximity switch has continuity when the drain
valve is closed. Also verify that there is 24 VAC at pin #1
(24 VAC supply) and pin #5 (24 VAC input from DVI).
controller has been unplugged, the primary controller
will not work. The jumper must be installed on the
relay board (connection J33) to allow the primary
controller to function if the backup controller is removed.
Optional Basket Lift:
•The basket lift is a self contained unit that requires a
120, 208 or 240V supply. With most fryer configurations, the power is supplied from the entrance box at
the back of the fryer but some cofigurations will require power direct from a wall outlet.
•When supply voltage is applied to the basket lift assembly, it goes through a voltage selector switch to a
multi tap 24V, 80VA transformer. The transformer supplies 24 VAC to the driver board at connection J54.
Note: When power is supplied to basket lift assembly, the baskets will lift to the up position.
•When a timer is activated, it will send a 24 VDC
signal to pin #1 (24 VDC+) at connector J51 on the
driver board. The driver board will generate a 24 VDC
output at J53 to the basket lift motor, lowering the
basket.
Note: For the purpose of testing, jumping pins #1
and #2 at connection J5 on the driver board will simulate a 24 VDC signal from the controller, lowering the
basket.
US
CAN
GB
Backup Solid State Control:
The backup solid state control works the same as the primary solid state control, with the exception of the 24 VAC
supply passing through the solid state backup transfer
switch to the computer or solid state digital control.
If the transfer switch is set to backup or if the backup
7
L22-238 Rev 2 (10/12)
Fryer Trouble Shooting
PROBLEMPO SSIBLE CAUSEACTION
C o mp ute r will N O T tur n O N
Dis p la y does N OT light
Computer shows "IGNITION
FAILURE" or "HEAT FAIL" and
machine does NOT heat.
Machine is heating slowlyA. Side On contactor
Oil is hotter or colder than computer
/c o ntr o lle r d is p la ys
Computer displays "DRAINING" or
"TURN OFF"
A. No power to the machine
B. F1 Fuse blown
C. T1A Transformer
A. Hi limit tripped
B. Heat demand relay
C. Relay board
B. Heat Demand contactor
C. Element
D. Loss of power on one leg of 3
phase input power
A. Temperature calibration
B. Probe
C. Probe wiring terminals
A. Blue drain valve not fully c losed
B. Sensor switch
C. I ncorrect switc h gap /a lignment
A. Check building circuit breaker, verify
power cord is plugged in
B. Check F1A Fuse. Replace if defective
C. Check voltage in and out of T1A
A. Once the oil temp has gone below
375°F +
automa tica lly, if no t, re p lac e H i- limit
B. Check & replace if defective
C. Check & replace if defective
A. Check & replace if defective
B. Check & replace if defective
C. Check & replace if defective
D. Check input power. Repair or call a
qua lifie d ele c t r ic ia n
A. Adjust temperature offset up to +
B. Check & replace if defective
C. Clean or repair terminals
A. Check position of handle
B. Switch may be loose or have loose
wires, replace if defective
C. Check gap/alignment, replace if defective
20°, the Hi- limit should r e s e t
10°F
Computer heat demand lights are lit,
machine does not heat. HD & SO
lights on relay board are lit.
Computer displays "PROBE
FAILURE"
A. Side on contactor
B. Heat demand contactor
C. Unit not ge tting 3 p ha se powe r
A. Shorted probe
B. Open probe
C. Probe wiring terminals
8L22-238 Rev 2 (10/12)
A. Check & replace if defective
B. Check & replace if defective
C. Check circuit breaker, is 3 phase power
cord p lugge d in all the way
A. Check probe & replace if defective
B. Check probe & replace if defective
C. Clean or repair terminals
Filter Trouble Shooting
PROBLEMPOSSIBLE CAUSEACTION
US
CAN
GB
Red return handle is pulled out, but no
pump sound can be he ard
Drain valve is closed, computer has
been r e s et, b ut c omp uter still d isp la ys
"DRAIN IN G"
Oil is returning to the vat slowly or not
at all
Air b ubb le s a r e in t he oil b e ing re tur ned
to the vat
A. Red return handle not completly
open
B. Filter circuit breaker may be tripped
or in the off position
C. F ilter motor the r ma l o verlo ad ma y
be tripped
D. Sensor switch may be loose or
defective
E. Po wer cord unplugged or loose
A. Blue drain valve not fully closed
B. Sensor switch
C. Incorrect switch gap/alignment
A. Dirty filter paper
B. Strainer cap dirty
C. F ilter pa n not pus hed in completely
D. O- rings not sealing on pick up tube
A. Strainer cap not tight
B. Stainer cap not in pick up tube
C. F ilter pa n not pus hed in completely
D. O- rings not sealing on pick up tube
A. Pull on red return handle to make sure
valve is c omp letly o pe n
B. Reset the circuit breaker or press it to
the on position
C. Push the red reset button on the end of
the motor
D. Check that the switch is tight and that it
has the correct gap. Replace if defective
E. Check the power cord at the fryer
entrance box and at the pump box and
make sure that the power cords are plugged
in and /or pushed in all the way
A. Check position of handle
B. S witch may be loo s e o r ha ve loose
wires, replace if defective
C. Check gap/alignment, replace if defective
A. Change filter paper
B. Remove strainer cap and clean it
C . P ush filter pan in
D. Check & replace if defective
A. Tighten strainer cap
B. I nstall str a iner c ap
C . P ush filter pan in
D. Check & replace if defective
Dra in va lve is op e n, the o il is dra ining
slowly or not at all
A. Drain valve is not fully open
B. D r a in line is p lugge d with d e br is
9
A. Apply a little more pressure to the drain
valve handle to check that the drain valve is
fully o p en
B. Use the clean out rod to clear the drain
valve opening. If this does not clear the
blockage, close the drain valve, and call for
service
L22-238 Rev 2 (10/12)
F
use:
A
F1 -
If fuse is blown, A.C. will not be lit.
Relay Board Component Explanation
Trouble Shooting Lights:
.C. -
When lit, F1 Fuse and T1 Transformer are good.
S.O. H.D. -
When lit, A1 Computer is on and K10 Contactor should be energized.
When lit, A1 Computer is on and calling for heat, K11 Contactor should be energized
Relays:
K1 -
Heat Demand Relay, will be energized when A1 Computer calls for heat and when H.D. is lit.
K3 -
Side On Relay, will be energized when A1 Computer is on and A.C. is lit.
Connectors:
J31 -
Connects to A1 Computer
J32 -
To Side On and Heat Demand Contactors and Heat Feed Back.
J33 -
To 24VAC jumper harness.
J34 -
To Drain Switch and optional Basketlifts
J35 -
Input voltage from transformer
J35
1
5
Relay Board:
J connectors are marked on the
Note:
relay board.
•With 24 VAC supplied to pin #2 at
connector J35 and a good F1 fuse, the
relay board will have a 24 VAC output
at pin #2 on connectors J33 and J34
and the A.C. indicator will be
illuminated.
Note: If the fryer is equipped with a
computer or solid state digital, at
connection J33 there will be a
jumper from pin #2 to pin #10 to
supply 24 VAC to pin # 2 at
connection J31 to supply the
controller with 24VAC.
•When the board receives a 24 VDC
side on input at pin #7 on connectors
J31 or J33, the S.O. indicator will
illuminate, the side on relay (S.O.) will
energize and there will be a 24 VAC
output at pin #4 on connector J32.
•When the board receives a 24 VDC
heat demand input at pin #6 on
connectors J31 or J33, the H.D.
indicator will illuminate, the heat
demand relay (H.D.) will energize and
there should continuity between pin #1
and pin #2 at connector J32.
6
J32
1
7
J34
1
12
A.C.
F1 FUSE
PITCO# 60127301A
DATE: MMDDYY
H.D.
K1
HEAT
DEMON
J33
10
J31
S.O.
K3
SIDE
1
1
10L22-238 Rev 2 (10/12)
US
C
O
CLAS
S
BACK-UP
TO
TEMPERATURE
CONTROL (OPT)OR NO OPTION
JUMPER BL OCK
J34
LIFT OPTION
TO BASKET
CAN
GB
NONE
NONE
SIDE ON
NONE
24VAC POWER SWITCHED
NONE
J33
11
12
10
DC RETURN
HEAT DEMAND
9
7
5
8
6
HEAT FEED BACK
4
DRAIN OR FLOAT SWITCH
24VACH POWER
24VACN RETURN
2
3
1
K3
SIDE ON
HEAT DEMAND ENABLE
HEAT DEMAND
J32
1
K1
HEAT DEM
SIDE ON
TO HIG H LIMIT
TO RESET SWITCH IF REQUIRED
24VAC RETURN
5
3
2
4
K3
K1
HEAT
DEMAND
J34
HEAT FEED BACK
6
DC COMMON
BASKET LIFT LEFT
BASKET LIFT RIGHT
5
6
4
3
7
Relay Board
24VCOM
5
2
M A
FR
24VA
4
3
21
TRANSFORM ER
AC POWER
60127301
F1
FUSE
J35
24VAC
1
2
J34
SWITCH
TO DRAIN
OR FLOAT
1
DRAIN OR
FLOAT SWITCH
3
24VACH
24VAC RETURN
11
J31
624
(DC)(DC)
HEAT DEMAND
HEAT FEEDBACK
TO
PRIMARY
COOKING
CONTROLLER
10
NONE
578
SIDE ON (DC)
BASKET LIFT L
BASKET LIFT R
24VDC RETURN
9
L22-238 Rev 2 (10/12)
Schematics
L22-238 Rev 2 (10/12)
10
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