Frymaster BIH52, MH52 service manual - page 6

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BIH52 / MH52
SERIES GAS FRYERS
TABLE OF CONTENTS
CHAPTER 1: Introduction
1.1 General ..............................................................................................................................1-1
1.2 Safety Information.............................................................................................................1-1
1.3 Computer Information....................................................................................................... 1-2
1.4 European Community (CE) Specific Information.............................................................1-2
CHAPTER 2: Installation Instrucitons
2.1 General Installation Requirements.................................................................................... 2-1
2.2 Caster/Leg Installation ......................................................................................................2-3
2.3 Pre-Connection Preparations............................................................................................. 2-3
2.4 Connections to Gas Line................................................................................................... 2-5
2.5 Converting to Another Gas Type ......................................................................................2-7
2.6 Frypot Boil-Out................................................................................................................. 2-8
CHAPTER 3: Service Procedures, Troubleshooting and Wire Diagrams
3.1 Functional Description...................................................................................................... 3-1
3.2 Accessing Fryers for Servicing .........................................................................................3-5
3.3 Cleaning the Gas Valve Vent Tube................................................................................... 3-5
3.4 Checking the Burner Manifold Gas Pressure.................................................................... 3-6
3.5 Measuring Flame Current.................................................................................................. 3-8
3.6 Replacing Fryer Components............................................................................................ 3-8
3.6.1 Replacing the Controller or the Controller Wiring Harness............................... 3-8
3.6.2 Replacing the Temperature Probe or High-Limit Thermostat ...........................3-9
3.6.3 Replacing the Interface Board.......................................................................... 3-10
3.6.4 Replacing an Ignition Module.......................................................................... 3-10
3.6.5 Replacing an Ignitor Assembly........................................................................ 3-10
3.6.6 Replacing or Cleaning a Combustion Air Blower............................................3-11
3.6.7 Replacing a Gas Valve..................................................................................... 3-14
3.6.8 Replacing a Burner Assembly.......................................................................... 3-14
3.6.9 Replacing the Frypot........................................................................................ 3-15
3.6.10 Replacing Frypot Insulation and/or Upper Burner Rails..................................3-17
3.7 Troubleshooting and Problem Isolation.......................................................................... 3-21
3.7.1 Ignition Failure................................................................................................. 3-22
3.7.2 Improper Burner Function................................................................................ 3-23
3.7.3 Improper Temperature Control ........................................................................3-24
3.7.4 Recovery Time and the M100B “Rec Loc” Condition ....................................3-25
3.7.5 Filtration Malfunctions..................................................................................... 3-26
3.7.6 Leakage ............................................................................................................ 3-29
3.8 Troubleshooting Guides.................................................................................................. 3-29
3.8.1 Troubleshooting the 24 VAC Circuit............................................................... 3-30
3.8.2 Troubleshooting the Gas Valve........................................................................ 3-33
3.8.3 Troubleshooting the Temperature Probe.......................................................... 3-34