Pitco SEH50 Service Manual

Technical Service and Exploded Parts
For Electric Fryers
Covering Models
SEH50 Full and Split
US
CAN
GB
Pitco Frialator, Inc., P.O. Box 501, Jct I-89 & I-93 Concord, NH 03302-0501 • 509 Route 3A, Bow, NH 03304
L22-238 Rev 2 (10/12)
• (603) 225-6684 • FAX (603) 225-8497
www.pitco.com
TO THE PURCHASER, OWNER AND STORE MANAGER
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
.
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2
L20-303 Rev 2. (10/12)
Table of Contents
How Does It Work? ........................................................... 4
Component Troubleshooting.............................................. 4
Temperature Probe Resistance Chart ................................. 4
Basic Trouble Shooting ...................................................... 6
Relay Board Component Explanation ................................ 8
Reserved for Ladder Diagram ............................................11
US
CAN
GB
Reserved for Schematics.................................................... 12-25
Basic Parts List................................................................... 27
Exploded Drawings ............................................................ 28-37
Element and Tank Components ......................................... 28
Pump Box and Drain Manifold........................................... 30
Main Entrance Box ............................................................. 32
Pump Assembly and Filter Pan .......................................... 34
Wire Harness’..................................................................... 36
L22-238 Rev 2 (10/12)
Chapter 1: HOW DOES IT WORK?
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 2k - 5k 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 digital controller, plug the resistor in at connector J41 behind the front panel.
•If the fryer is equipped with a solid state controller 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 elements 18.5 Ohms 220 volt elements 20.7 Ohms 240 volt elements 24.6 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.
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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
PROBLEM PO SSIBLE CAUSE ACTION
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 slowly A. 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
PROBLEM POSSIBLE CAUSE ACTION
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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
DEM ON
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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