Cooking Compartment Controls | Vulcan-Hart MHB24G, VHX24G5 instruction

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

Image 66

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

Contents

VHX Boiler Base Series High Efficiency GAS Steamers VHX24G Shown Table of Contents VHX Series Steamers Installation Maintenance Cleaning IntroductionGeneral Boiler Control Styles Water Supply Water Conditioning SpecificationsSystem Electrical Standard ToolsGas Supply Special Cooking Compartment Controls Steamer OperationCabinet Base Boiler VHX Series Steamers Operation Boiler Blowdown Steamer Shut OFF Blowdown/Drain Component FunctionVHX Series Steamers Component Function Ignition Control Module Water Inlet Valve manual Steam Header AssemblyWater Level Pressure Relief Valve Manifold Pressure Gauge Compartment Pressure SwitchSteam Solenoid Valve Steam Supply Manifold Component Locations Removal and Replacement of PartsVHX Series Steamers Removal and Replacement of Parts Cabinet Base Boiler Controls Cabinet 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 Valves Burner Head Assembly Complete Burner Assembly Heat Exchanger VHX Series Steamers Removal and Replacement of Parts Cooking Compartment Doors RemovalGasket Latch Assembly Handle Boiler Service Procedures and AdjustmentsClean-Out Inspection Water Level Probe Housing Blowdown Descaler Cathodic Protector Water Level Controls Test Auxiliary Low level Cut-Off Control High Limit Cycling Fill and Cold Water Solenoid Valves Small increments Inline Water Strainer Cleaning Boiler BLOWDOWN/DRAIN Solenoid Valve Pressure Switch Adjustment Main Burner Ignition Checks GAS 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 Terminals Spark Verification Test Cooking Compartment Intake Shut-Off Valve Adjustment Steam FlowDoor Sealing Adjustment Cooking Compartment Doors Door Latch Adjustment VHX Series Steamer Electrical Operation Electrical Operation Low Level Cut-Off & Differential Control Auxiliary Low Level Cut-Off Board Layout and LED Legend LED Legend Initial Conditions State a Boiler Operational Status LED IndicatorReset Engaged State C Aux Water Level Satisfied State B K51 Close Air Pressure Switch Satisfied State DK32 Close Burner ON, Boiler Heating to generate steam State E Initial Fill and Preheat Sequence of OperationNEW Style Controls Boiler HL-LED N9, N10, N11, N12, N13 go out N14, N16, N17 go out Water Refill After Initial Fill Boiler Blowdown/drain VHX Series Steamer Electrical Operation Cooking Compartment Controls This page Intentionally Left Blank Schematics Models Built After 5/25/00 New Style Boiler Controls VHX 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