State Industries STC-077 dimensions Error Codes, Code Indication, Code #S, Above

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S U F S E R V I C E H A N D B O O K

E R R O R C O D E S

ERROR CODES

CODE INDICATION

00This is normal operation, 00 is displayed each time the heater is powered up. Indicates the pressure switch circuit was not open during the prediagnostic system

check when the proper state of the Draft Prover Switches are verified. The Blower

01Prover Switch is normally open, the circuit should therefore be open during the prediagnostic system check at the beginning of each cycle. Check Blower Proving Switch for continuity with the blower off, there should be no continuity, check pressure switch wiring.

02Indicates the heater failed to light after 3 trials. Check ignitor, gas pressure.

04Indicates the ECO is open. Check water temperature in tank, ECO will open at 202° F and can be reset below 160° F.

05Indicates a Temperature Probe is open. Check both probes for proper resistance and continuity.

Indicates the Pressure Switch Circuit did not close after blower was energized.

Check normally open Blower Prover Switch operation, check normally closed

11Blocked Outlet, Inlet, and Low Gas pressure (SUF 240 only) to ensure they remain closed. Check for blocked vent pipe (s) or if equivalent feet venting limits have been exceeded.

15Indicates temperature sensed by probe(s) is out of bounds, reading is less than 30° F. Check resistance of temp probes, check water temperature in tank.

22Indicates Ignition Relay failure. Should be off and it is on. Try resetting, turn power off and on, if code remains, replace board.

25Indicates temperature sensed by probe(s) is out of bounds. Reading is more than 220° F. Check resistance of temp probes, check water temperature.

CODE #S

Internal software or hardware errors, electrical line noise can cause erratic

operation and these error codes. Try adding a “line filter” (available from electrical

ABOVE

suppliers) to the 120 VAC power supply. If these errors codes persist or the control

199

cannot be reset, replace the control board.

 

All these errors cause a “soft” lockout with the exception of 04 - ECO, which is a “hard” lockout. Soft lockouts will reset automati- cally after 60 minutes or if the reset button is pushed at any time. The ECO lockout, error code 04 will have to be manually reset by pushing the rest button after water in the tank has cooled below 160° F.

State Water Heaters

39

Technical Training Department

Ashland City, Tennessee © 2004

STC-077

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Contents Commercial SUF Service Handbook Table of ContentsIntroduction Tools RequiredInstallation GAS Supply SpecificationsClearances GAS RequirementsVenting Equivalent Feet of Pipe Intake or ExhaustDirect Venting Vent Length Table Number Minimum Maximum Elbows Pipe FeetVenting Configurations Venting MaterialsHorizontal Installation Vertical Installation Concentric Vent TerminationVenting Clearances SUF ModelExterior Sidewall Clearances AIR Requirements Direct Vent InstallationMAKE-UP AIR Direct Communication Vertical DuctsInsufficient MAKE-UP AIR Horizontal DuctsBackdraft Contaminated AIR Flammable ItemsMultiple Unit Water Piping Condensation Operation Sequence of OperationControls Normal Indications / Readings / SettingsDuring Call for Heat Circut Boards Display Circuit Board Ignition Circuit BoardTroubleshooting PRE-SERVICE TipsVAC to Control VAC to Control BoardTransformer VAC to TransformerVAC from Transformer ECO Check VAC to ECOVAC from ECO Check for 24 VAC Between PIN 1 on CN3 Plug and GroundTemperature Probe Temperature Probe ResistanceUpper Lower Temperature Probe PlugPressure Switch Continuity Pressure Switch Continuity TestBlower VAC to BlowerTake AIR and GAS Pressure Readings Pressure Switch PerformanceAmbient Room AIR Pressure Pressure Switch Continuity Test Operational OnlyVAC to Ignitor VAC to IgnitorIgnitor Resistance Ignitor Resistance CheckSUF 240 only GAS Valve TestVAC to GAS Valve Supply GAS Pressure Test GAS Pressure CheckManifold GAS Pressure Test Component Information Orifice TablePressure Swtches Pressure Switches Pressure Switches Part Number / Activation PRESSURE†Wiring Diagrams Service Aids SUF Muffler T E SWhen should SUF’s be delimed? Questions and AnswersHow often should the anodes be inspected? Error Codes Code IndicationCode #S AboveService Checklist III. GAS Pressure Fill in Blank ALL Units onSUF Models 100 150, 100 199 and 100 State Water HeatersUltra Force SUF Models Replacement Parts Description SUFUltra Force SUF Controls Parts List T E S Expert’s Choice

STC-077 specifications

The State Industries STC-077 is a notable addition to the realm of high-efficiency water heaters, exemplifying advanced engineering and innovative design. The STC-077 is particularly recognized for its exceptional performance and energy-saving capabilities, making it an ideal solution for both residential and commercial applications.

One of the standout features of the STC-077 is its impressive energy efficiency rating. Utilizing state-of-the-art technology, this water heater operates with a high energy factor (EF) that significantly reduces operating costs compared to traditional water heating systems. This is especially beneficial in today's climate of rising energy costs and increased environmental awareness.

The STC-077 employs a robust stainless-steel tank construction that not only provides durability but also mitigates the risk of corrosion, ensuring longevity and reliability. This innovative design approach helps extend the product's lifespan while maintaining consistent performance throughout its use. Coupled with superior insulation, users can expect minimal heat loss and enhanced energy efficiency, making it a sustainable choice for consumers.

The unit is equipped with advanced controls that provide precise temperature regulation. This feature improves user experience and safety, allowing for customization to meet individual needs. Additionally, the STC-077’s intuitive digital display makes monitoring and adjusting settings straightforward, providing convenience and ease of use.

In terms of capacity, the STC-077 offers versatility with options suitable for various household sizes and demands. Whether for a small apartment or a busy commercial establishment, its modular design allows for seamless integration into existing systems while providing adequate hot water supply.

Furthermore, the STC-077 incorporates innovative technologies aimed at reducing maintenance needs. With easy access for servicing and built-in diagnostics, users can monitor performance proactively, ensuring the unit operates at optimal efficiency.

Overall, the State Industries STC-077 shines as a forward-thinking water heater. Its combination of high energy efficiency, durable construction, advanced technology, and user-friendly features make it a comprehensive solution for those seeking reliable hot water with minimal environmental impact. Whether for homeowners looking to lower energy bills or businesses seeking dependable performance, the STC-077 stands out as a premier choice in water heating solutions.
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