Frymaster Gas Rethermalizers FBKR18 Series - Manual (Page 5)

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CHAPTER 5: Operator Troubleshooting
5.1 Introduction ....................................................................................................................... 5-1
5.2
Operator Troubleshooting Guides ..................................................................................... 5-2
5.3 Replacing the Computer or Computer Wiring Harness .................................................... 5-6
CHAPTER 6: Service Procedures
6.1 Functional Description ...................................................................................................... 6-1
The Electronic Ignition System......................................................................................... 6-1
Computers ......................................................................................................................... 6-2
Interface
Board .................................................................................................................. 6-2
Temperature Probe ............................................................................................................ 6-3
Water Level Sensors.......................................................................................................... 6-3
6.2 Accessing the Rethermalizer for Servicing ....................................................................... 6-3
6.3 Cleaning the Gas Valve Vent Tube................................................................................... 6-6
6.4 Checking the Burner Manifold Gas Pressure .................................................................... 6-4
6.5 Measuring Flame Current.................................................................................................. 6-4
6.6 Replacing Components...................................................................................................... 6-4
6.6.1 Replacing the Computer or Computer Wiring Harness .................................................... 6-4
6.6.2 Replacing the Temperature Probe ..................................................................................... 6-4
6.6.3 Replacing the Interface Board........................................................................................... 6-5
6.6.4 Replacing an Ignition Module........................................................................................... 6-5
6.6.5 Replacing an Ignitor Assembly ......................................................................................... 6-6
6.6.6 Replacing the Combustion Air Blower ............................................................................. 6-6
6.6.7 Replacing the Gas Valve ................................................................................................... 6-6
6.6.8 Replacing a Burner Assembly........................................................................................... 6-7
6.6.9 Replacing the Cookpot ...................................................................................................... 6-7
6.7
Troubleshooting and Problem Isolation ............................................................................ 6-8
6.7.1 Ignition Failures ................................................................................................................ 6-9
6.7.2 Improper Burner Functioning............................................................................................ 6-9
6.7.3 Improper Temperature Control ....................................................................................... 6-11
6.7.4 Computer-Related Problems ........................................................................................... 6-12
6.8 Troubleshooting
Guides .................................................................................................. 6-12
6.8.1 Troubleshooting the Gas Valve....................................................................................... 6-13
6.8.2 Troubleshooting the 24 VAC Circuit .............................................................................. 6-14
6.8.3 Troubleshooting the Temperature Probe......................................................................... 6-16
Probe Resistance Chart.................................................................................................... 6-17
6.9 Simplified Wiring Diagrams ........................................................................................... 6-18
CHAPTER 7: Parts List
7.1 Burner System Components.............................................................................................. 7-1
7.2 Cabinetry and Associated Components............................................................................. 7-2
7.3 Computer, Component Box Assembly, and Associated Parts .......................................... 7-3
7.4 Cookpot and Associated Parts........................................................................................... 7-4
7.5 Gas Supply Components ................................................................................................... 7-5
7.6 Plumbing Components ...................................................................................................... 7-6