A.O. Smith GPS-75 Trouble Shooting Guide, Water Heater Control LED Status Problem Solution

Page 18

TROUBLE SHOOTING

Water heater may exhibit problems that are unrelated to a malfunction of the water heater itself. The following information and tables may serve to answer your question about a problem that you are having without having to call a service agent.

WARNING: DO NOT BY-PASSANY CONTROLS TO MAKE HEATER OPERATE. OPERATE ONLYAS WIRED FROM FACTORY.

TROUBLE SHOOTING GUIDE

Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician. Read the GENERAL SAFETY INFORMATION section first.

WATER HEATER CONTROL

LED STATUS

PROBLEM

 

SOLUTION

 

An open earth ground circuit to the

1.

Check that the earth ground connection is

A B C

ignition system.

 

properly connected.

 

 

2.

Check that the ground conductor on the

 

 

 

water heater is properly connected.

A B C

Wiring error or a high resistance to

1.

Check for proper connection of line

earth ground.

 

neutral and hot wires.

 

 

 

 

2.

Check that the water heater is securely

 

 

 

connected to earth ground.

A B C

Pressure switch remained closed longer

1.

Pressure switch wiring is incorrect.

than 5 seconds after the call for

2.

Replace pressure switch.

 

 

heat began.

 

 

A B C

Pressure switch remained open longer

1.

Pressure switch wiring is incorrect.

than 5 seconds after the combustion

2.

Pressure switch tubing not connected

 

 

blower was energized.

 

correctly.

 

 

3.

Air intake or exhaust obstructed.

A B C

Error in the hot surface ignitor circuit.

1.

Check that all wiring is correct and secure.

 

 

2.

Replace hot surface ignitor.

 

System in lockout.

1.

Gas supply is off or too low to operate.

A B C

 

2.

Hot surface ignitor not positioned

 

 

correctly.

 

 

 

 

 

3.

Low voltage to the water heater.

 

 

4.

Electric polarity to unit is incorrect - test

 

 

 

and correct.

A B C

Problem in the gas valve driver circuit.

1.

Turn power to the water heater off for

 

 

 

10 seconds and then back on.

 

 

2.

Replace gas control valve.

A B C

Problem with the internal circuit.

1.

Turn power to the water heater off for

 

 

10 seconds and then back on.

 

 

 

 

 

2.

Replace gas control valve.

A B C

Problem with the internal circuit.

1.

Turn power to the water heater off for

 

 

 

10 seconds and then back on.

 

 

2.

Replace gas control valve.

A B C

Flame signal sensed out of

1.

Replace gas control valve.

 

proper sequence.

 

 

A B C

ECO activated.

1.

Replace gas control valve.

 

A B C

One of the temperature adjust

1.

Press and release each of the buttons once.

 

buttons stuck closed.

2.

Replace gas control valve.

A B C

Water temperature sensor is

1.

Check that all wiring is correct and secure.

 

either open or short circuited.

2.

Replace gas control valve.

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Contents Residential GAS Water Heaters Replacement Parts and Deliming Products GET to Know Your Water HeaterExtended NON-USE Periods External DamageChemical Vapor Corrosion Improper CombustionInstallation Confined Space Unconfined SpaceWater Potable Heating and Space Heating Water ConnectionsConnection of GAS Pipe Relief ValveVenting Vent Pipe TerminationPlanning the Vent System Preparation of Blower Assembly Installation of Vent SystemVent Terminal INSTALLATION, Sidewall CondensatePower Vent Wiring Schematic Figure Vent Pipe Preparation Installation of Vent SYSTEM, SidewallInstallation of Vertical Vent System Initial PreparationCement Selection of MaterialsPrimer ApplicatorsStep E OperationTo Operate the Heater Step GWhat to do if YOU Smell GAS Do not TRY to Light the Burner by HandMaintenance Temperature RegulationMain Burner High Temperature Limit SwitchPower Venter Maintenance Venting SystemCondensation Trouble ShootingService and Repair Cathodic PROTECTION-ANODETroubleshooting Trouble Shooting Guide Water Heater Control LED Status Problem SolutionLimited Residential GAS Warranty Conditions and ExceptionsImportant Information Smith Water Products CO., INC

GPS-75 specifications

The A.O. Smith GPS-75 is a state-of-the-art gas water heater designed to deliver efficient and reliable hot water solutions to residential and light commercial users. With its sleek design and advanced technology, this unit stands out in the competitive water heating market.

One of the primary features of the GPS-75 is its impressive 75-gallon capacity, making it ideal for larger households or businesses that require a substantial volume of hot water. This water heater delivers a first-hour rating of up to 91 gallons, ensuring that you will always have enough hot water on demand, even during peak usage times.

The GPS-75 utilizes a high-efficiency gas burner that operates at an energy factor of 0.67, which helps to minimize energy costs while providing robust heating performance. This means that users can enjoy powerful hot water output without having to worry about skyrocketing energy bills. Additionally, the unit is equipped with a state-of-the-art electronic ignition system that ensures reliable startup and operation. This feature eliminates the need for a pilot light, enhancing safety and energy efficiency.

In terms of durability, the GPS-75 features a glass-lined interior which protects the tank from rust and corrosion. This adds to the unit's longevity and reduces the need for maintenance and replacement. The water heater also comes with insulating foam in the tank and a special temperature and pressure relief valve to enhance safety.

Another notable technology included in the GPS-75 is its advanced diagnostics feature. This system is designed to monitor and diagnose problems, allowing for quick troubleshooting and minimizing downtime. This is especially useful for service professionals and homeowners alike, as it facilitates efficient maintenance and reduces unexpected repair costs.

The GPS-75 also has an environmentally friendly design, meeting stringent energy efficiency guidelines. This aligns with the growing demand for sustainable solutions in modern homes and businesses.

In summary, the A.O. Smith GPS-75 gas water heater combines an impressive 75-gallon capacity, high efficiency, and advanced safety features to offer users a reliable and economical hot water solution. With its innovative technologies and durable construction, it stands as a strong contender in the water heating industry. Whether for residential or commercial use, the GPS-75 ensures that hot water is always available when needed.