Frymaster FBRA18 Series manual Is 24VAC Present on COM No terminal of latch Relay?

Page 44

6.8.3 Troubleshooting the 24 VAC Circuit in FBRA18 Units (Continued)

A

Is 24VAC

present on N/O terminal of latch relay?

NOTE: All voltage measurements involving the gas valve leg of the 24V circuit must be made within 4 seconds of unit calling for heat. If unit does not fire within 4 seconds, ignition modules will lock out and controller must be turned off then back on to reset.

Probable causes are failed

No24V transformer or failed wiring between transformer box and

component box.

Yes

Is 24VAC

present on COM No terminal of latch

relay?

Yes

Is 24VAC

present on J1 pin No 3?

If 12VDC is applied across coil, probable cause is failed relay. If not,

probable cause is failed wiring between controller and latch relay or failed

controller.

Probable causes are failed wiring between terminal block and computer, or failed computer.

Yes

When water level
is above lower water level	No	Go to
sensor, is CYCLE LED lit?		"C".
Yes
Go to
"B".

6-17

Image 44

Contents Hour Service Hotline Canada Page FBR18 & FBRA18 Series GAS Rethermalizers Table of Contents Parts List Parts Ordering and Service Information Safety InformationDefinitions Installation, Operating, and Service PersonnelEquipment Description Shipping Damage Claim Procedure What to do if your equipment arrives damagedGeneral Installation Requirements Caster/Leg Installation Incoming Gas Pressures Connecting to the Gas Supply Converting to Another Gas Type Introduction FBR18/FBRA18 Digital ControllerOperating the FBR18/FBRA18 Timers Boiling-Out the Cookpot Shutting the Rethermalizer Down Daily Checks and Services Quarterly Checks and ServicesSemi-Annual Checks and Services Clean Combustion Air BlowerCheck Burner Manifold Pressure Burner Manifold Gas Pressures Introduction Troubleshooting Guides To FBRA18 units onlyProblem Yes Has the correct setpoint Yes Replacing the Controller or Controller Wiring Harness FBR18 & FBRA18 Series GAS Rethermalizers Service Procedures Functional DescriptionController and Mechanical Timers Temperature Probe Measuring Flame Current Cleaning the Gas Valve Vent TubeChecking the Burner Manifold Gas Pressure Replacing the Temperature Probe Replacing the Interface BoardReplacing an Ignitor Assembly Replacing an Ignition ModuleReplacing the Gas Valve Replacing a Burner AssemblyReplacing the Combustion Air Blower Troubleshooting and Problem Isolation Replacing the CookpotIgnition Failures Incoming Gas Pressures Improper Burner FunctioningPage Improper Temperature Control Troubleshooting the Gas Valve Troubleshooting the 24 VAC Circuit in FBR18 Units Unit is Connected to24 VAC Circuit in FBR18 Units Troubleshooting the 24 VAC Circuit in FBRA18 Units Is PowerIs 24VAC Present on COM No terminal of latch Relay? Harness Is J1 pin 24VAC Circuit in FBRA18 Units Troubleshooting the Temperature Probe Probe Resistance Chart Wiring Diagram for FBR18 Units 8050417DFBRA18 Units FBR18 & FBRA18 Series GAS Rethermalizers Parts List Burner System ComponentsCabinetry and Associated Components Control Box Assembly and Associated Parts, FBR18/ FBRA18 Controller and Component Box Assemblies Cooking Timer Control Panel Components Cookpot, FBR18 Cookpot, FBRA18 Gas Supply Components Plumbing Components Page Service Hotline