Table Of Contents - Frymaster Pro H50-Series Service And Parts Manual

CHAPTER 1: Service Procedures
1.1 Functional Description.......................................................................................................1-1
1.1.1 The Electronic Ignition System...........................................................................1-1
1.1.2 Interface Board....................................................................................................1-2
1.1.3 Thermostats.........................................................................................................1-4
1.2 Accessing Fryers for Servicing ..........................................................................................1-4
1.3 Cleaning the Gas Valve Vent Tube....................................................................................1-5
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.............................................................................1-9
1.6.4 Replacing an Ignition Module ............................................................................1-9
1.6.5 Replacing an Ignitor Assembly...........................................................................1-9
1.6.6 Replacing or Cleaning a Combustion Air Blower ............................................1-10
1.6.7 Replacing a Gas Valve......................................................................................1-13
1.6.8 Replacing a Burner Assembly...........................................................................1-14
1.6.9 Replacing the Filter Motor, Filter Pump, or Filter Pump Solenoid Valve........1-15
1.6.10 Replacing the Frypot.........................................................................................1-16
1.6.11 Replacing Frypot Insulation and/or Upper Burner Rails ..................................1-18
1.7 Troubleshooting and Problem Isolation...........................................................................1-24
1.7.1 Ignition Failure..................................................................................................1-24
1.7.2 Improper Burner Function ................................................................................1-25
1.7.3 Improper Temperature Control .........................................................................1-27
1.7.4 Computer Malfunctions ....................................................................................1-27
1.7.5 Filtration Malfunctions .....................................................................................1-28
1.7.6 Leakage .............................................................................................................1-30
1.7.7 Basket Lift Malfunctions ..................................................................................1-30
1.7.8 Interpretation of Digital Controller Lights........................................................1-32
1.8 Troubleshooting Guides...................................................................................................1-32
1.8.1 Troubleshooting the 24 VAC Circuit................................................................1-32
1.8.2 Troubleshooting the Gas Valve.........................................................................1-36
1.8.3 Troubleshooting the Temperature Probe...........................................................1-36
1.8.4 Probe Resistance Chart .....................................................................................1-37
1.9 Simplified Wiring Diagrams............................................................................................1-38
1.9.1 Full-Vat Dual-Spark Module Wiring Diagram.................................................1-38
1.9.2 Full-Vat Single-Spark Module Wiring Diagram (Australia & Pacific Rim) ....1-39
1.9.3 Dual-Vat Dual-Spark Module Wiring Diagram................................................1-40
1.10 Principal Wiring Connections..........................................................................................1-41
1.11 Wiring Diagrams..............................................................................................................1-42
PRO H50-SERIES GAS FRYERS

TABLE OF CONTENTS

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