State Industries STC-074 specifications Voltage is not present between E4, Pin

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SBN TANK TYPE COMMERCIAL GAS WATER HEATER

SERVICE HANDBOOK

TEST 7 - INDUCER ON – PROVER SWITCH AND LOW GAS SWITCH

CLOSED – NO IGNITER OPERATION

Conditions:

Power on

Plugs in receptacles

Inducer on

24V at ignition board E1, Pin 10

No Power to igniter Note: Flash code of LED

Check E4 pin 4 to Ground

Continuity Test

E4 Plug

Check E1 pin 10

24V

Check E4 pin 2 to Ground

TEST 7

Voltage check and continuity check of hot surface igniter circuit

Continuity check - Power off- Plug removed from E4 receptacles Nominal 80 VAC check - Plug in E4- Power "On"

If…	...then
continuity is not indicated between E4	check wiring and connection from E4 plug to
continuity is not indicated between E4	HSI receiving plug
plug pin 2 to 4.	HSI receiving plug
plug pin 2 to 4.	replace HSI Assembly
	replace HSI Assembly
continuity is present	resistance should be between 11 and 20 Ohms
continuity is present	at a temperature of 77°F
	at a temperature of 77°F
voltage is not present between E4, Pin 2	replace ignition board
to ground	replace ignition board
to ground
voltage is present	continue
voltage is not present between E4, Pin 4	check wiring and plug connections to HSI
to ground	replace HSI
voltage is present	note igntion board, Flash code LED
voltage is present	HSI should work
	HSI should work

©2003	32	Technical Training Department

Ashland City, Tennessee

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Contents Service Handbook Table of Contents SBN Service Handbook Introduction Custom Commercial Storage Tank Model Number Break Down QualificationsTop and Front Views of Minimum Clearances To Combustibles Installation ConsiderationsRequired Exterior Clearances Exterior ClearanceComb AIR Make-Up Air Direct Communication Not Direct Vent Make-Up Air Horizontal Ducts Make-Up Air Vertical DuctsAir for Combustion Flammable Items Contaminated AirGas Valve Outlet View Venting Atmospheric Multiple Heaters VentingNine Rules for Good Vents SBN Tank Type Commercial GAS Water Heater Service Handbook SBN Tank Type Commercial GAS Water Heater Service Handbook Multiple Gas Fired Tank-Type Heaters Type B GAS VentTechnical Dataventing Top View SequenceFront View of Water Heater SBN Tank Type Commercial GAS Water Heater Service Handbook HSI Integrated Ignition Control Board HSI Lower Front View of SBN Water HeaterECO Wiring DiagramElectrical Sequence of SBN Water Heater Operation PRE-SERVICE Checklist Water Heater Control Ignition Control Board ConditionsTest 2 Polarity Check Flash Codes of Diagnostic IndicatorTest 3 Continuity Check High Limit ECO Test 2 Polarity CheckTest 3 Continuity Check of High Limit ECO Test 4 Upper Temperature Probe Continuity CheckIs indicated Is not presentTest 5 Calling for Heat no Inducer Operation Water Heater ControlCheck to Inducer Test on Ignition Board 4 Pin Receptacle E4 VAC Check of Blower Prover/Low Gas Pressure Circuit Test 6 Inducer ON-NO IgnitionVoltage is not present between E4, Pin Test of Igniter and gas valve circuit Test 8 Igniter Heats no Main BurnerContinuity Check Of Gas Valve Coil Test 9 Igniter Heats no Main BurnerFlame Prover Circuit Check Test 10 Main Burner Ignition for Less than 5 SecondsIf… Then Test 11 Water Heater Shutting OFF below SettingDisplay Lights on Integrated Heater Control ECO SBN Tank Type Commercial GAS Water Heater Service Handbook Technical Training Department 120 154 180 199 200A 250A 275A 310A 366A 400A General Questions and Answers SBN Tank Type Commercial GAS Water Heater Service Handbook Draft Proving Pressure Switch Table