Vulcan-Hart MHB24G, VHX24G5 manual Cooking Compartment Controls, Procedures and Adjustments

Page 66

VHX SERIES STEAMER - TROUBLESHOOTING

COOKING COMPARTMENT CONTROLS

SYMPTOM		POSSIBLE CAUSES

Cooking compartments do not operate.	1.	No power to compartments.
	2.	Pressure in boiler is below compartment pressure switch
		setting.
	3.	Door switch malfunction.
	4.	Timer malfunction.
	5.	Malfunctioning pressure switch in compartment.
	6.	Verify correct compartment wiring and functioning
		components.

Steam generated inside compartment	1.	Steam supply solenoid not fully closing (clogged or dirty). See
when timer is off.		"FILL AND COLD WATER SOLENOID VALVES" in "SERVICE
		PROCEDURES AND ADJUSTMENTS".
	2.	Timer contacts 1 & 3 closed.

Timer motor does not run.	1.	Door open or door switch inoperative.
	2.	Timer not getting power.
	3.	Timer motor inoperative.

Door not closing properly.	1.	Door latch assembly malfunction or out of adjustment. See
		"DOOR SEALING ADJUSTMENT" in "SERVICE
		PROCEDURES AND ADJUSTMENTS"
	2.	Striker adjustment. See "DOOR LATCH ADJUSTMENT" in
		"SERVICE PROCEDURES AND ADJUSTMENTS".

Door won’t open.	1.	Latch won’t release. See "DOOR LATCH ADJUSTMENT" in
		"SERVICE PROCEDURES AND ADJUSTMENTS".

Buzzer not operating.	1.	Timer malfunction.
	2.	Buzzer malfunction.

Compartment leaks water around door	1.	Compartment drain screen clogged.
or water accumulating in compartment .	2.	Drain line obstructed or not to an open gap drain.
	3.	Steamer not level.

Steam leaks around door.	1.	Worn gasket - See "DOOR SEALING ADJUSTMENT" in
		"SERVICE PROCEDURES AND ADJUSTMENTS".
	2.	Damaged gasket.
	3.	Drain line obstructed or not to an open drain.

F24700 (October 2001)		Page 66 of 68

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Contents VHX Boiler Base Series High Efficiency GAS Steamers VHX24G ShownTable of Contents VHX Series Steamers Installation Maintenance Cleaning IntroductionGeneral Boiler Control Styles Water Supply Water Conditioning SpecificationsSystem ElectricalStandard ToolsGas Supply SpecialCooking Compartment Controls Steamer OperationCabinet Base Boiler VHX Series Steamers OperationBoiler Blowdown Steamer Shut OFF Blowdown/Drain Component FunctionVHX Series Steamers Component Function Ignition Control ModuleWater Inlet Valve manual Steam Header AssemblyWater Level Pressure Relief ValveManifold Pressure Gauge Compartment Pressure SwitchSteam Solenoid Valve Steam Supply ManifoldComponent Locations Removal and Replacement of PartsVHX Series Steamers Removal and Replacement of Parts Cabinet Base Boiler ControlsCabinet Base Boiler Controls Water Level Controls Main or Auxiliary Llco Relay BoardCooking Compartment Controls Water Level Gauge Assembly Pressure SwitchesBoiler Assembly Pilot GAS Valve Main GAS Valve Boiler Fill and Cold Water Condenser Solenoid ValvesBurner Head Assembly Complete Burner AssemblyHeat Exchanger VHX Series Steamers Removal and Replacement of Parts Cooking Compartment Doors RemovalGasket Latch Assembly HandleBoiler Service Procedures and AdjustmentsClean-Out InspectionWater Level Probe Housing Blowdown Descaler Cathodic ProtectorWater Level Controls TestAuxiliary Low level Cut-Off Control High Limit CyclingFill and Cold Water Solenoid Valves Small incrementsInline Water Strainer Cleaning Boiler BLOWDOWN/DRAIN Solenoid ValvePressure Switch Adjustment Main Burner Ignition ChecksGAS Manifold Pressure Adjustment VHX Series Steamer Service Procedures and Adjustments AIR Pressure Switch Adjustment GAS Pilot Pressure Adjustment Pressure Readings Inches W.C GAS Manifold Pressure Adjustment Ignition Control Module Checks TerminalsSpark Verification Test Cooking Compartment Intake Shut-Off Valve Adjustment Steam FlowDoor Sealing Adjustment Cooking Compartment DoorsDoor Latch Adjustment VHX Series Steamer Electrical OperationElectrical Operation Low Level Cut-Off & Differential ControlAuxiliary Low Level Cut-Off Board Layout and LED Legend LED LegendInitial Conditions State a Boiler Operational Status LED IndicatorReset Engaged State C Aux Water Level Satisfied State BK51 Close Air Pressure Switch Satisfied State DK32 Close Burner ON, Boiler Heating to generate steam State EInitial Fill and Preheat Sequence of OperationNEW Style Controls Boiler HL-LEDN9, N10, N11, N12, N13 go out N14, N16, N17 go outWater Refill After Initial Fill Boiler Blowdown/drainVHX Series Steamer Electrical Operation Cooking Compartment Controls This page Intentionally Left Blank Schematics Models Built After 5/25/00 New Style Boiler ControlsVHX Series Steamer Electrical Operation Models Built Before 5/25/00 Old Style Boiler Controls Cooking Compartment Controls Wiring Diagrams VHX Series Steamer Electrical Operation Models Built Before 5/25/00 Old Style Boiler Controls VHX Series Steamer Electrical Operation Cooking Compartment Controls Troubleshooting VHX Series Steamer TroubleshootingBoiler Base Controls Symptom Possible Causes Adjustments Boiler blowdown solenoid valve clogged and not fully closing Boiler Base Procedures and Adjustments VHX Series Steamer Condensed Spare Parts List VHX Series Steamer Condensed Spare Parts ListNEW Style Controls only VHX24G, VHX24G5, MHB24G