Frymaster FBKR18 Series, FBCR18 manual Troubleshooting the 24 VAC Circuit

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6.8.2 Troubleshooting the 24 VAC Circuit

WATER LEVEL IN

COOKPOT IS ABOVE

LOWER WATER

LEVEL SENSOR AND

COMPUTER IS

ACTIVATED.

Is 24VAC

No

Probable cause is a

 

present on J2

 

failed transformer.

 

Pin 7?

 

 

 

 

 

Yes

 

 

 

Is LATCH

No

Probable cause is failed

 

computer or failed 15-pin

 

LED illuminated?

 

 

wiring harness.

 

 

 

 

Yes

 

 

 

Is combustion

No

Is 12VDC

No

present on J4

air blower runing?

 

pin 5?

 

 

 

 

Yes

 

Yes

 

Is cookpot filling?

Yes

Is HEAT LED

Yes

illuminated?

 

 

 

 

 

No

 

No

 

Probable cause

 

 

is a failed interface board

 

 

 

or failed temperature

 

 

 

probe.

 

Is WATER LED

 

Probable causes are dirty

 

No

low water sensor or failed

 

illuminated?

 

 

interface board, in that

 

 

 

order.

 

Yes

 

 

 

Is 24VAC

 

Probable causes are

 

present on J2

No

grounded high water level

 

pin 2?

 

sensor or failed interface

 

 

 

board.

 

Yes

 

 

 

Probable cause is a

failed computer.

Is 24VAC

No

 

Probable cause is a

present on J2

 

 

failed interface board.

Pin 4?

 

 

 

 

 

Yes

 

 

 

Is 24VAC

Yes

24VAC circuit

present on gas

is OK.

valve?

 

 

 

 

 

No

Probable causes are blown

ignition module fuse, failed

 

 

ignition module, or failed

 

centrifugal switch in blower, in

 

 

that order.

Probable causes are failed solenoid valve or broken or loose wire.

6-14

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Contents Hour Service Hotline Canada Page FBCR18 & FBKR18 Series GAS Rethermalizers Table of Contents Operator Troubleshooting Applicability and Validity Parts Ordering and Service InformationEquipment Description Safety InformationInstallation, Operating, and Service Personnel What to do if your equipment arrives damaged Shipping Damage Claim ProcedureDefinitions General Installation Requirements National Code Requirements Caster/Leg Installation Incoming Gas Pressures GAS Connections and Pipe Sizes Converting to Another Gas Type FBCR18 Series Computer FBCR18 Series ComputerProgramming the FBCR18 Series Computer FBKR18 Series Computer Programming the FBKR18 Series Computer Page Operating the FBKR18 Series Rethermalizer FBKR18 Computer Display Messages Honeywell Shutting the Rethermalizer Down Inspect Rethermalizer and Accessories for Damage Daily Checks and ServicesSemi-Annual Checks and Services Quarterly Checks and ServicesCheck Burner Manifold Pressure Burner Manifold Gas Pressures Page Troubleshooting Guides Water not HEATING. Autofill Worked Properly Burners do Not Light Problem is beyond scope of operator troubleshooting Replacing the Computer or Computer Wiring Harness Functional Description Computers Temperature Probe Measuring Flame Current Cleaning the Gas Valve Vent TubeChecking the Burner Manifold Gas Pressure Replacing the Interface Board Replacing the Temperature ProbeReplacing the Gas Valve Replacing an Ignitor AssemblyReplacing an Ignition Module Replacing the Combustion Air BlowerReplacing a Burner Assembly Replacing the Cookpot Troubleshooting and Problem IsolationIgnition Failures Improper Burner Functioning Incoming Gas PressuresPage Computer-Related Problems Improper Temperature ControlTroubleshooting the Gas Valve Troubleshooting the 24 VAC Circuit 24VAC Circuit Troubleshooting the Temperature Probe Probe Resistance Chart FBKR18 only Simplified Wiring DiagramsInterface Board Computer Burner System Components FBCR18 & FBKR18 Series GAS Rethermalizers Parts ListSide, Cabinet, CRS for S/S units, use Cabinetry and Associated ComponentsComputer, Component Box Assembly, and Associated Parts Cookpot and Associated Parts Gas Supply Components Nipple, Close, 1 NPT Plumbing ComponentsService Hotline

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