Frymaster FBRA18 Series manual Harness

Page 45

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

B

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.

Is 24VAC

present across the gas Yes valve main coil (PV)

terminal?

No

Gas valve leg of 24V circuit is OK.

Is

24VAC present on

VALVE terminal of LEFT Yes ignition module?

Probable cause is

failed wiring between module and gas valve.

No

	Is 24VAC present	Yes	If fuse is not
	on 25V terminal of LEFT	Yes	blown, module
	on 25V terminal of LEFT		blown, module
	ignition module?		has failed.
	No
			No

Is 24VAC

present on J2 Yes pin 4?

Is 24VAC present

on 25V terminal of RIGHT Yes ignition module?

Is

24VAC present on

VALVE terminal of RIGHT

ignition module?

No

No

Yes

Is 24VAC

present on J2 Yes pin 3?

No

Probable cause is

failed wiring between terminal block and J2 pin 3.

Probable causes are failed	Probable cause
wiring between blower centrifugal	Probable cause
switch and module, failed	is failed wiring
centrifugal switch, or failed	harness.
wiring harness.
Probable cause
is failed CYCLE
relay.

6-18

Image 45

Contents Hour Service Hotline Canada Page FBR18 & FBRA18 Series GAS Rethermalizers Table of Contents Parts List Safety Information Parts Ordering and Service InformationInstallation, Operating, and Service Personnel Equipment DescriptionDefinitions What to do if your equipment arrives damaged Shipping Damage Claim ProcedureGeneral Installation Requirements Caster/Leg Installation Incoming Gas Pressures Connecting to the Gas Supply Converting to Another Gas Type FBR18/FBRA18 Digital Controller IntroductionOperating the FBR18/FBRA18 Timers Boiling-Out the Cookpot Shutting the Rethermalizer Down Quarterly Checks and Services Daily Checks and ServicesClean Combustion Air Blower Semi-Annual Checks and ServicesCheck Burner Manifold Pressure Burner Manifold Gas Pressures Introduction To FBRA18 units only Troubleshooting GuidesProblem Yes Has the correct setpoint Yes Replacing the Controller or Controller Wiring Harness Functional Description FBR18 & FBRA18 Series GAS Rethermalizers Service ProceduresController and Mechanical Timers Temperature Probe Cleaning the Gas Valve Vent Tube Checking the Burner Manifold Gas PressureMeasuring Flame Current Replacing the Interface Board Replacing the Temperature ProbeReplacing an Ignition Module Replacing an Ignitor AssemblyReplacing a Burner Assembly Replacing the Combustion Air BlowerReplacing the Gas Valve Replacing the Cookpot Troubleshooting and Problem IsolationIgnition Failures Improper Burner Functioning Incoming Gas PressuresPage Improper Temperature Control Troubleshooting the Gas Valve Unit is Connected to Troubleshooting the 24 VAC Circuit in FBR18 Units24 VAC Circuit in FBR18 Units Is Power Troubleshooting the 24 VAC Circuit in FBRA18 UnitsIs 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 8050417D Wiring Diagram for FBR18 UnitsFBRA18 Units Burner System Components FBR18 & FBRA18 Series GAS Rethermalizers Parts ListCabinetry 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