Middleby Marshall PS555, PS570, PS360, PS200, PS220, PS224 PS310 manual Table Of Contents

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment.

WARNING

DISCONNECT THE OVEN FROM ITS ELECTRICAL

POWER SUPPLY BEFORE SERVICING.

NOTICE

During the warranty period, ALL parts replacement and servicing should be performed by your Middleby Marshall Authorized Service Agent. Service that is performed by parties other than your Middleby Marshall Authorized Service Agent may void your warranty.

NOTICE

Using any parts other than genuine Middleby Marshall factory manufactured parts relieves the

manufacturer of all warranty and liability.

NOTICE

Middleby Marshall reserves the right to change specifications at any time.

TABLE OF CONTENTS

Section 1 - Sequence of Operation				4
I.	Gas Oven Sequence of Operation			4
II.	Electric Oven Sequence of Operation			6
Section 2 - Air Flow and Heat Transfer				7
I.	Types of Heat Transfer			7
II.	Blowers and Blower Speed			7
	A.	PS200-series ovens		7
	B.	PS360-series ovens		8
	C.	PS555/570-series ovens		8
III.	Air	Fingers		8
	A.	Description and Function		8
	B.	Configuration and Alignment		9
	C.	Performing a Test Bake		9
	D.	PS300/350 Air Finger Shutter Adjustment		10
IV.	Oven Capacity			12
	A.	Conveyor Speed and Bake Time		12
	B.	Belt Time		12
	C.	Time of Delivery (TOD)		12
Section 3 - Troubleshooting and Servicing Components
I.	Conveyor Speed Controller and Drive Motor			13
	A.	Part Number Reference - Speed Controllers		13
	B.	Part Number Reference - Pickup Assemblies		14
	C.	Preparing to Service the Speed Controller		14
	D.	Controller/Motor Failure		15
	E.	Basic Troubleshooting Flowcharts		16
		•	If the Conveyor Runs at Full Speed	16
		•	If the Conveyor Will Not Run at All	17

F.	Initial Troubleshooting	18
G.	Conveyor Control Pickup Test	19
H.	Conveyor Motor Test	19
I.	Replacing the Magnetic Pickup	19

J.Unshielded Pickup Wires on Early PS360-series Ovens . 19

K. Appendices 20

•Conveyor sensor wiring changes for PS360-series

and PS570S, 10/95 20

•Service Bulletin MM-133B - Installation Instructions for Conveyor Speed Controller Kit with Thumbwheel,

P/N 42810-0133, 4/95 21

•Instructions for Service Kit 42810-0133- Conveyor

Speed Controller Kit with Thumbwheel, 4/95 23

•Service Bulletin MM-177 - Introduction and Compat- ibility of Conveyor Speed Controller with Digital

Display, P/N 37337, 8/00 27

•Instructions for Service Kit 44756 - Conveyor Speed

Controller Kit for PS200R68-series Ovens, 2/02 ... 28

•Service Bulletin MM-189 - New Conveyor Gear

		Motors, Brushes, and Pickup Clamps, 8/01	29
	•	DIP switch settings for Conveyor Speed Controller
		with Digital Display (P/N 37337), 4/02	30
II. Temperature Controller			30
A.	Part Number Reference - Temperature Controllers		31
B.	Description		32
C.	High Limit/Cooldown Functions		32
D.	Troubleshooting		32
E.	Appendices		32

•Temperature Controller Terminal

Cross-Reference, 4/02 32

•Instructions for Service Kit 47321 - Digital

Temperature Controller Kit, 2/02 33

•Service Bulletin MM-136 - Electrical Noise Filter

	Capacitor Assembly on Temperature Controllers,
2	9/93	43