Frymaster FPHD manual Electronic Circuits, Improper Burner Function

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HIGH EFFICIENCY DECATHLON SERIES GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1.8.1 Ignition Failure (cont.)

The Electronic Circuits

If gas and electrical power are supplied to the fryer, the next most likely cause of ignition failure is a problem in the 24 VAC circuit of fryers equipped with electronic ignition systems, or in the pilot system for those without electronic ignition. If the fryer is equipped with a SUFF/UFF filtration system, verify that the drain valve is fully closed. (The valve is equipped with a microswitch that must be closed for power to reach the gas valve. The valve handle can appear to be closed when the microswitch is open.) If the valve is fully closed, or the fryer does not have a filtration system, refer to the troubleshooting guides in this chapter.

The Gas Valve

If the problem is not in the 24 VAC circuit or pilot system, it is most likely in the gas valve. Before replacing the gas valve, refer to the troubleshooting guides in this chapter.

1.8.2 Improper Burner Function

In these instances, the burner ignites but exhibits abnormal characteristics, such as popping, incomplete lighting of the burner, fluctuating flame intensity, and flames “rolling” out of the fryer.

Popping indicates delayed ignition. In most cases, the main gas valve is opening, but the burner is not immediately lighting. When ignition does take place, excess gas ignites rapidly rather than smoothly.

The primary causes of popping are:

1.low or fluctuating gas pressure,

2.misdirected or weak pilot flame,

3.clogged burner orifices,

4.clogged burner flame-transfer holes

5.clogged burners,

6.inadequate make-up air,

7.heat damage to the controller or ignition module,

8.an out-of-adjustment igniter or broken ignition wire,

9.a defective ignition module,

10.missing or misaligned burners,

11.clogged vent tube (causing incorrect gas pressure), or

12.make-up air is blowing down the flue.

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Contents Includes HD63/Red Robin and Common Cabinetry Hour Service HotlineMAY Page Computers FCC Table of Contents Page Functional Description GAS Information Altitudes of 2000 feet or lessPilot System Configuration Electronic Ignition ConfigurationControl Options Interface BoardsThermatron Board P/N Interface Boards Test Meter Setting Pins Test Results Indicates power from 12V transformerAccessing Fryers for Servicing ThermostatsRestraints Cleaning the Gas Valve Vent Tube if applicable Adjusting Burner Manifold Gas PressureMain Pilot Adjusting the Pilot FlameCalibrating the Thermatron Trailing PilotReplacing Fryer Components Replacing the ComputerReplacing the Temperature Probe Computer-equipped Fryers Replacing the Temperature Probe Computer-equipped Fryers Probe cannot be repositioned Installing the New Temperature Probe Replacing the High-limit ThermostatLocate the high-limit probe Capillary tube cannot be repositioned Replacing Rocker Switches Figure BReplacing Rocker Switches Replacing the Pilot Assembly Replacing the FrypotRemoving the joiner strip Removing gas manifold shield Removing bolts arrows securing flue to frypot Nut Valve Boot Clamp Remove the drain valve nut and attached Hardware Cutting frypot seal prior to frypot removal Lifting frypot from fryer Troubleshooting and Problem Isolation Ignition FailureElectronic Circuits Improper Burner FunctionImproper Burner Function Improper Temperature Control Improper Computer Function Improper Filtration Function Frypot Leakage Improper Basket Lift Function Bell-Crank Basket Lifts Troubleshooting Guides ProblemNot possible High Efficiency Decathlon, Thermatron with Constant Pilot Wiring DiagramsRight/left sides are the same Computer with Constant Pilot CM4-S Wiring Dean Oil Return Wiring Dean Oil Return Wiring, with Solenoid Probe Resistance Charts High Efficiency Decathlon Series GAS Fryers Parts List High Efficiency Decathlon HD Primary ComponentsSee Orifices, Section Decathlon HD50 Primary Components includes Scfhd unitsSee Drain Manifold Components, Section Decathlon HD50 Primary Components includes Scfhd units Decathlon HD60 Primary Components includes Scfhd units 823-4692Flue Box Assembly also used on HD63 fryers Front, Flue Box Decathlon FPHD65 Primary Components Cabinet Upper Back Channel, Base 265 465 565Cabinet Lower Back Door Assembly, with Liner also used for HD63 fryers Natural Orifices OrificesPropane Orifices Control Panels Control Panel Options, Joiner Strips, and AccessoriesAccessories Joiner StripsOptional Components and Controllers Bezels HD/SCFHD50 SCFHD456 SCFHD60Interface Boards High Efficiency Decathlon Series GAS Fryers Parts List Drain Valve Assembly, 1 1 ⁄ 2 with Microswitch Drain Valve Assembly, 1 1 ⁄ 2 without MicroswitchFlush Oil Drain Line Oil Return Manifold Components Oil Return Manifold Components Oil Return Manifold Components Oil Return and Oil Flush Components Suction Manifold Assembly Microswitch Bracket Assembly, Oil ReturnOil Suction Assembly Oil Suction Start FittingDescription Filtration Components SCFHD60 and SCFHD63 Series Fryers 106-7543Filtration Components FPHD65 Series Fryers Basket Lift Components Basket Lift Components Trough, Holster, & Cover Components Fasteners Screws, Nuts, Bolts Service Hotline