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BIPH52/55-MPH52/55
SERIES GAS FRYERS
TABLE OF CONTENTS
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 ...........................1-8
1.6.3 Replacing the Interface Board............................................................................1-9
1.6.4 Replacing an Ignition Module..........................................................................1-10
1.6.5 Replacing an Ignitor Assembly........................................................................ 1-10
1.6.6 Replacing or Cleaning a Combustion Air Blower............................................1-11
1.6.7 Replacing a Gas Valve.....................................................................................1-14
1.6.8 Replacing a Burner Assembly..........................................................................1-15
1.6.9 Replacing the Filter Motor, Filter Pump, or Filter Pump Solenoid Valve.......1-16
1.6.10 Replacing the Frypot ........................................................................................1-17
1.6.11 Replacing Frypot Insulation and/or Upper Burner Rails..................................1-19
1.7 Troubleshooting and Problem Isolation..........................................................................1-25
1.7.1 Ignition Failure.................................................................................................1-25
1.7.2 Improper Burner Function................................................................................1-26
1.7.3 Improper Temperature Control ........................................................................1-28
1.7.4 Computer Malfunctions....................................................................................1-28
1.7.5 Filtration Malfunctions.....................................................................................1-29
1.7.6 Leakage ............................................................................................................1-30
1.8 Troubleshooting Guides..................................................................................................1-31
1.8.1 Troubleshooting the 24 VAC Circuit...............................................................1-33
1.8.2 Troubleshooting the Gas Valve........................................................................1-35
1.8.3 Troubleshooting the Temperature Probe..........................................................1-35
1.9
Probe Resistance Chart....................................................................................................1-36
1.10 Principal Wiring Connections......................................................................................... 1-37
1.11 Wiring Diagrams.............................................................................................................1-38
1.11.1 Main..................................................................................................................1-38
1.11.2 Transformer / Filter Boxes...............................................................................1-39
1.11.2.1 MPH152/155.................................................................................1-39
1.11.2.2 BIPH252/255 and 452/455 Domestic............................................1-40
1.11.2.3 BIPH252/255 and 452/455 International ......................................1-41
1.11.2.4 BIPH352/355 Domestic ................................................................1-42
1.11.2.5 BIPH352/355 International ...........................................................1-39