Table Of Contents - Frymaster H50 Series Service And Parts Manual

CHAPTER 1: Service Procedures
1.1 Functional Description.......................................................................................................1-1
The Electronic Ignition System .........................................................................................1-1
Interface Boards .................................................................................................................1-2
Thermostats........................................................................................................................1-4
1.2 Accessing Fryers for Servicing..........................................................................................1-4
1.3 Cleaning the Gas Valve Vent Tube ...................................................................................1-4
1.4 Checking the Burner Manifold Gas Pressure.....................................................................1-5
1.5 Measuring Flame Current ..................................................................................................1-7
1.6 Replacing Fryer Components ............................................................................................1-7
1.6.1 Replacing the Controller or the Controller Wiring Harness ...............................1-7
1.6.2 Replacing the Temperature Probe or High-Limit Thermostat ............................1-7
1.6.3 Replacing the Interface Board ...........................................................................1-8
1.6.4 Replacing an Ignition Module ............................................................................1-8
1.6.5 Replacing an Ignitor Assembly...........................................................................1-9
1.6.6 Replacing or Cleaning a Combustion Air Blower ..............................................1-9
1.6.7 Replacing a Gas Valve......................................................................................1-12
1.6.8 Replacing a Burner Assembly ..........................................................................1-13
1.6.9 Replacing the Frypot.........................................................................................1-14
1.6.10 Replacing Frypot Insulation and/or Upper Burner Rails ..................................1-15
1.7 Troubleshooting and Problem Isolation...........................................................................1-20
1.7.1 Ignition Failures ................................................................................................1-20
1.7.2 Improper Burner Functioning ...........................................................................1-21
1.7.3 Improper Temperature Control .........................................................................1-23
1.7.4 Computer-Related Problems .............................................................................1-24
1.7.5 Filtration Problems............................................................................................1-25
1.7.6 Leakage .............................................................................................................1-28
1.7.7 Basket Lift Malfunctions ..................................................................................1-28
1.7.8 Interpretation of Digital Controller Lights........................................................1-31
1.8 Troubleshooting Guide ....................................................................................................1-31
Probe Resistance Chart ....................................................................................................1-38
1.9 Simplified Wiring Diagrams............................................................................................1-39
1.10 Principal Wiring Connections..........................................................................................1-41
1.11 Wiring Diagrams - Main ................................................................................................1-42
1.12 Wiring Diagrams - Transformer Boxes...........................................................................1-48
1.13 Wiring Diagrams - Basket Lifts ......................................................................................1-50
1.14 Wiring Diagrams - Filter Boxes ......................................................................................1-53
1.15 Wiring Diagrams - Oil Return.........................................................................................1-54
H50 SERIES GAS FRYERS

TABLE OF CONTENTS

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