Pitco ME2 Operators Manual

		US
		CAN
		GB
	Technical Service and Exploded Parts
	For Electric Fryers
	Covering Models
	MEII, ME2 Full and Split
Pitco Frialator, Inc.,	P.O.Box501,JctI-89&I-93Concord,NH03302-0501•509Route3A,Bow,NH03304
L22-233 Rev 1 (04/03)	[phone]•[phone]•FAX[phone]	www.pitco.com

WARNING! FIRE HAZARD

THE OIL LEVEL SHOULD NOT FALL BELOW THE MINIMUM INDICATED LEVEL ATANY TIME. THE USE OF OLD OIL CAN BE DAGEROUS AS IT WILL HAVE A REDUCED FLASH-POINT

AND BE MORE PRONE TO SURGE BOILING.

WARNING

INSTALLATION AND ALL CONNECTIONS MUST BE MADEACCORDING TO NATIONALAND

LOCAL REGULATIONSAND CODES IN FORCE.

WARNING

ACOUNTRYAPPROVED ALL POLE CIRCUIT BREAKER WITH A MINIMUM OPEN CONTACT GAP OF 3mm MUST BE USED FOR PROPER INSTALLATION.

WARNING

THE FRYER IS NOT JET STREAM APPROVED. DO NOT CLEAN THE APPLIANCE WITH A

WATER JET.

NOTICE

INSTALLATION SHOULD ONLY BE DONE BYA COMPETENT SERVICE TECHNICIAN. THE MODEL & SERIAL NUMBER, AND ELECTRICAL REQUIREMENTS STAMPED INTO THE DATA PLATE, LOCATED ON THE INSIDE PANEL OF THE DOOR.

NOTICE

THIS APPLIANCE IS INTENDED FOR PROFESSIONAL USE ONLY, AND AS SUCH, SHOULD

BE OPERATED BY FULLY TRAINED PERSONNEL.

NOTICE

IT IS RECOMMENDED THAT THIS MACHINE BE INSPECTED BYA QUALIFIED TECHNICIAN

ON AYEARLY BASIS.

WARNING

THE POWER SUPPLY MUST BE DISCONNECTED SERVICING OR CLEANING THE UNIT.

WARNING

SHORTENING, WHEN IT ISAT OPERATING TEMPERATURES, IS VERY HOTAND

DANGEROUS! USE EXTREME CAUTION WHEN HANDLING! USE PROPER PROTECTIVE

GEAR SUCH AS INSULATED GLOVES, APRONS, FACE SHIELD, AND SLEEVES WHEN HANDLING HOT SHORTENING. DO NOTATTEMP TO MOVE MACHINE THAT HAS HOT OIL IN IT. ALLOW TO COOLTO ROOM TEMPERATURE OR DRAIN THE OIL INTO A SUITABLE

CONTAINER BEFORE MOVING THE FRYER.

L22-233 Rev 1 (04/03)

US

CAN

GB

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
Ladder Diagram ..................................................................	11
Schematics .........................................................................	12-21
Basic Parts List...................................................................	23
Exploded Drawings ............................................................	24-33
Element and Tank Components .........................................	24
Pump Box and Drain Manifold...........................................	26
Main Entrance Box .............................................................	28
Pump Assembly and Filter Pan ..........................................	30
Wire Harness’ .....................................................................	32

L22-233 Rev 1 (04/03)

Chapter 1: HOW DOES IT WORK?

The McDonalds Electric II 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.

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.

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.

•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.

Chapter 2: COMPONENT

TROUBLESHOOTING:

Probe:

Hood Relay System: U.S./Canada units only

•There is one Hood Relay (K6) per "battery" of fryers (located on rear bottom brace of left hand fryer), it is wired in parallel to every computer (both sides of a twin). When any side of any computer is turned on this relay energizes (turning on the hood) and will stay energized until all of the computers are turned off.

Filter System:

•Opening the RED return valve handle will close the

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.

If the probe is suspect, check its resistance and the oil/ air temperature at which it was taken. Compare these

L22-233 Rev 1 (04/03)

4

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 Limits:

The hi - limit switch is a normally closed switch until the temperature at the hi-limit bulb reaches 425°F ± 20°F.

In order to test this switch it will be necessary to utilize the temperature control hi-limit feature. Refer to PM Card FR015 for instructions on how to perform this test.

WARNING

During this test 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.

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 unitsonly.

US

Drain Valve & Return Valve Switches: CAN GB

These switches are a magnetically operated proximity switches. When the Drain Valve handle is moved to the open position, theActuator 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 theActuator 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.Aquick check for 24VAC can be done at the relay board behind the computer. TheAC led will be lit if the F1 fuse is good and the board is receiving 24VAC

Elements:

Each Element has three coils inside it, check all element 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.

5	L22-233 Rev 1 (04/03)

Fryer Trouble Shooting

PROBLEM

POSSIBLE CAUSE

ACTION

Computer will NOT turn ON	A. No power to the machine	A. Check building circuit breaker, verify
Display does NOT light	B. F1 Fuse blown	power cord is plugged in
	C. T1A Transformer	B. Check F1A Fuse. Replace if defective
		C. Check voltage in and out of T1A
Computer shows "IGNITION	A. Hi limit tripped	A. Once the oil temp has gone below
FAILURE" or "HEAT FAIL" and	B. Heat demand relay	375°F + 20°, the Hi-limit should reset
machine does NOT heat.	C. Relay board	automatically, if not, replace Hi-limit
		B. Check & replace if defective
		C. Check & replace if defective
Machine is heating slowly	A. Side On contactor	A. Check & replace if defective
	B. Heat Demand contactor	B. Check & replace if defective
	C. Element	C. Check & replace if defective
	D. Loss of power on one leg of 3	D. Check input power. Repair or call a
	phase input power	qualified electrician
Oil is hotter or colder than computer	A. Temperature calibration	A. Adjust temperature offset up to +10°F
/controller displays	B. Probe	B. Check & replace if defective
	C. Probe wiring terminals	C. Clean or repair terminals
Computer displays "DRAINING" or	A. Blue drain valve not fully closed	A. Check position of handle
"TURN OFF"	B. Sensor switch	B. Switch may be loose or have loose
	C. Incorrect switch gap/alignment	wires, replace if defective
		C. Check gap/alignment, replace if defective
Computer heat demand lights are lit,	A. Side on contactor	A. Check & replace if defective
machine does not heat. HD & SO	B. Heat demand contactor	B. Check & replace if defective
lights on relay board are lit.	C. Unit not getting 3 phase power	C. Check circuit breaker, is 3 phase power
		cord plugged in all the way
Computer displays "PROBE	A. Shorted probe	A. Check probe & replace if defective
FAILURE"	B. Open probe	B. Check probe & replace if defective
	C. Probe wiring terminals	C. Clean or repair terminals

L22-233 Rev 1 (04/03)

6

Filter Trouble Shooting

US

CAN

GB

PROBLEM	POSSIBLE CAUSE	ACTION
Red return handle is pulled out, but no	A. Red return handle not completly	A. Pull on red return handle to make sure
pump sound can be heard	open	valve is completly open
	B. Filter circuit breaker may be tripped	B. Reset the circuit breaker or press it to
	or in the off position	the on position
	C. Filter motor thermal overload may	C. Push the red reset button on the end of
	be tripped	the motor
	D. Sensor switch may be loose or	D. Check that the switch is tight and that it
	defective	has the correct gap. Replace if defective
	E. Power cord unplugged or loose	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
Drain valve is closed, computer has	A. Blue drain valve not fully closed	A. Check position of handle
been reset, but computer still displays	B. Sensor switch	B. Switch may be loose or have loose
"DRAINING"	C. Incorrect switch gap/alignment	wires, replace if defective
		C. Check gap/alignment, replace if defective
Oil is returning to the vat slowly or not	A. Dirty filter paper	A. Change filter paper
at all	B. Strainer cap dirty	B. Remove strainer cap and clean it
	C. Filter pan not pushed in completely	C. Push filter pan in
	D. O-rings not sealing on pick up tube	D. Check & replace if defective
Air bubbles are in the oil being returned	A. Strainer cap not tight	A. Tighten strainer cap
to the vat	B. Stainer cap not in pick up tube	B. Install strainer cap
	C. Filter pan not pushed in completely	C. Push filter pan in
	D. O-rings not sealing on pick up tube	D. Check & replace if defective
Drain valve is open, the oil is draining	A. Drain valve is not fully open	A. Apply a little more pressure to the drain
slowly or not at all	B. Drain line is plugged with debris	valve handle to check that the drain valve is
		fully open
		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

7	L22-233 Rev 1 (04/03)

Relay Board Component Explanation

Fuse:

F1 - If fuse is blown, A.C. will not be lit.

Trouble Shooting Lights:

A.C. - When lit, F1 Fuse and T1 Transformer are good.

S.O. - When lit, A1 Computer is on and K10 Contactor should be energized.

H.D. - 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

6
J32	FUSE
	F1
1

7

K1

J34 HEAT

DEM

1 J35 5

A.C.

PITCO# 60127301A

DATE: MMDDYY

H.D. S.O.

K3

SIDE

ON

1

12

J33

1

10

J31

1

L22-233 Rev 1 (04/03)

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			24VAC FROM A CLASS 2						J33
			TRANSFORMER
							12		NONE
									NONE
							11
									24VAC POWER SWITCHED
		1	2	3	4	5	10
		J35					9		NONE	TO
									NONE	BACK-UP
							8
									HEAT DEMAND	TEMPERATURE
		24VAC				24VCOM	6
		FUSE					7		SIDE ON	CONTROL (OPT)
							5		DC RETURN	OR NO OPTION
		F1					4		HEAT FEED BACK	JUMPER BLOCK
							2		24VACH POWER
		J34		AC POWER			3		24VACN RETURN
	TO DRAIN								DRAIN OR FLOAT SWITCH
		1					1
	OR FLOAT
							SIDE ON
	SWITCH
		2
							K3		J32
							HEAT DEM
	DRAIN OR		60127301					1	HEAT DEMAND
		1					K1
	FLOAT SWITCH								HEAT DEMAND ENABLE
9							SIDE ON
	24VAC RETURN	3						2
							K3
	24VACH	2							TO RESET SWITCH IF REQUIRED
								3
							HEAT
	HEAT FEEDBACK	4							TO HIGH LIMIT
							DEMAND	4
TO	HEAT DEMAND	6					K1		24VAC RETURN
PRIMARY	(DC)							5
		J31
COOKING								6	HEAT FEED BACK
CONTROLLER
	NONE	10							J34
	SIDE ON (DC)	7					3
	24VDC RETURN	5						4	DC COMMON	J34
										TO BASKET
	BASKET LIFT L	8							BASKET LIFT LEFT
								5		LIFT OPTION
	BASKET LIFT R	9						6	BASKET LIFT RIGHT
							7

	233-L22
	Rev	Relay Board
	(04/03) 1
			US CAN GB

Schematics

L22-233 Rev 1 (04/03)

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1	2	3		4	5	6	7
		DRAIN
		SWITCH					A
		NO
		NC
							B
	24 VAC	DVI	24 VAC		PROBE	HEAT
	INPUT	INPUT	COMMON		INPUT	FEEDBACK
						INPUT
		ON/OFF			HEAT DEMAND
		(SIDE ON)		24 VDC
		OUTPUT		COMMON	OUTPUT		C
		SO			HD
						HEAT	D
						DEMAND
				RELAY BOARD		CONTACTOR
		SIDE ON			HEAT
					DEMAND
							E
		AC				SIDE ON
		F1 FUSE
	VAC 24 COMMON					CONTACTOR
		24 VAC +
							F
	TRANSFORMER
					HI LIMIT
					SWITCH
					(DOMESTIC
					ONLY)
	TO TRANSFORMER				NO
	VAC 24 COMMON		+VAC 24		NC		G
					TO HI LIMIT
					SWITCH
					CONNECTOR
		HI LIMIT		RESET			H
							I
							J
				CE/EXPORT ONLY
1	2	3		4	5	6	7
				11		L22-233 Rev 1 (04/03)