Wolf WKGC 126622, WKGDX 126624, WKGX 126623, WKGCX 126625, WKGD 126621 Troubleshooting, ALL Models

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FULL SIZE GAS CONVECTION OVENS - TROUBLESHOOTING

TROUBLESHOOTING

WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER AND FOLLOW LOCKOUT/TAGOUT PROCEDURES, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

ALL MODELS

SYMPTOMS		POSSIBLE CAUSES
Blower motor doesn’t run with 1S in OVEN COOL	1.	Line voltage.
position.	2.	Power switch (S1) malfunction.
	3.	Switch (S3) malfunction.
	4.	Interconnecting wiring malfunction.
	5.	Motor inoperable.

Blower motor doesn’t run in ON position. OVEN	1.	Door switch malfunction.
COOL functions OK.	2.	Power switch contacts inoperative.
	3.	Interconnecting wiring malfunction.

Blower motor doesn’t run in OVEN COOL position.	1.	Power switch malfunction.
Runs OK in ON position.	2.	Interconnecting wiring malfunction.

Gas does not ignite; No spark; No Ignition Light ON.	1.	Shorted electrode on ignitor/flame sense.
	2.	Ignitor cable (high voltage) OPEN.
	3.	Heat relay (R3) malfunction.
	4.	Transformer (T1) inoperative.
	5.	High limit thermostat open.
	6.	Interconnecting wiring malfunction.
	7.	Ignition Module malfunction.

Sparks but gas does not ignite.	1.	Gas solenoid valve OFF or inoperative.
	2.	Manual gas valve CLOSED.
	3.	Gas supply OFF or Insufficient gas pressure.
	4.	Interconnecting wiring malfunction.
	5.	Ignition Module malfunction.

Gas ignites but will not maintain flame.	1.	Igniter lead connections malfunction.
	2.	Ignitor ground inoperative.
	3.	Ignitor/flame sense malfunction.
	4.	Insufficient gas pressure.
	5.	Snorkel vent plugged, obstructed or missing.
	6.	Incorrect polarity from transformer (T1) to Ignition
		module.

Excessive or low heat.	1.	Temperature probe malfunction on models
		WKGD, WKGDX. (Thermostat malfunction on
		models WKG, WKGX)
	2.	Temperature control board malfunction.
	3.	Gas pressure Insufficient.
	4.	Gas orifice plugged or obstructed.

Mechanical Timer inoperative or not functioning	1.	Interconnecting wiring malfunction.
properly.	2.	Line voltage incorrect.
	3.	Timer malfunction.

F32700 (February 2006)		Page 62 of 64

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Contents WKG Series Full Size GAS Convection Ovens Table of Contents Computer Control Models Only Introduction Installation Operation Cleaning LubricationSpecifications ToolsBottom Front Cover Covers and PanelsTop Front Cover Control PanelRemovable Components Procedure Control Panel ComponentsComponent Panel Components Temperature Probe WKGD/WKGDX GAS BurnerGAS Orifice GAS Solenoid ValveIgnition Control Module Spark Igniter Flame SenseBlower and Motor Oven Doors and Bearings Independent Doors Assembly Removal Oven Doors Simultaneous DoorsDoor Window Door Catch Ball Assembly Independent DoorsDisassembly Door Switch Lamp High Limit ThermostatInterior Lights Lamp Assembly Cooling FANService Procedures and Adjustments Solid State Temperature Control Calibration WKGD/WKGDXSolid State Temperature Mechanical Thermostat Calibration WKG/WKGXTemperature Probe Test WKGD/WKGDX Temperature Probe Test WKGD/WKGDXGAS Pressure Adjustment Temp F OhmsDoor Switch Adjustment Verification of Spark AT IgnitorBlower Adjustment Door Adjustment Door Catch Ball Adjustment Independent DoorsProcedure IntroductionOperation Setup Mode Computer Control WKGC/WKGCXSolid State Relay Test Computer Control Calibration WKGC/WKGCXProbe Test Component Function Function Switch S3Door Switch Motor Speed Relay R1 Solid State Temperature ControlBlower Motor Computer ControlComponent Location Temperature ProbeMechanical Temperature Control Gas Valve Dual SolenoidWKG/WKGX Plug, Socket and Components Standard Controls WKGD/WKGDX Plug, Socket and Components Standard Controls Full Size GAS Convection Ovens Electrical Operation WKGC/WKGCX Plug, Socket and Components Roast & Hold Standard Normal Roast Cycle Sequence of OperationWKG, Wkgx With Roast & Hold Option Mechanical KX Thermostat Timer Cycle Normal Roast Cooking Roast and Hold CycleFull Size GAS Convection Ovens Electrical Operation Timer Cycle Roast & Hold Cooking State Temperature Control WKGD, Wkgdx With Roast & Hold Option SolidTimer Cycle Normal Roast Cooking Roast and Hold Cycle Timer Cycle Roast & Hold Cooking Oven Cool Cycle Solid State Temperature Control Roast & Hold Standard on Computer Model Roast Cycle Normal CookingFull Size GAS Convection Ovens Electrical Operation Temperature and Time Cycle Cooking Oven Cool Cycle Computer Control ModelSchematics WKG, Wkgx Mechanical KX ControlsWKG, Wkgx Mechanical KX Controls, Roast & Hold Option WKGD, Wkgdx Solid State Temperature Control Full Size GAS Convection Ovens Electrical Operation WKGC, Wkgcx Computer Control Roast & Hold Standard Wiring Diagrams Full Size GAS Convection Ovens Electrical Operation WKG, Wkgx Mechanical KX Controls, Roast & Hold Option Full Size GAS Convection Ovens Electrical Operation WKGD, Wkgdx Solid State Temperature Control Full Size GAS Convection Ovens Electrical Operation Full Size GAS Convection Ovens Electrical Operation Full Size GAS Convection Ovens Electrical Operation WKGC, Wkgcx Computer Control Roast & Hold Standard Full Size GAS Convection Ovens Electrical Operation Troubleshooting ALL ModelsError Codes Computer Control Models onlyCondensed Spare Parts List Description