A.O. Smith BTH 300A, BTH 400A warranty Error Codes, Fault Conditions

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ERROR CODES

The following Error Codes are external to the controller.

01Pressure Switch Fail On, should be Off

11Pressure Switch Fail Off, should be On

02Ignition Fail after 3 attempts

04ECO Open

05Temperature Probe Open

15Temperature Out of Bounds < 30 degrees

25Temperature Out of Bounds > 220 degrees

The following Error Codes are internal to the controller. 113 Flame On Should be Off Fail

22Ignition Relay Fail is On, should be Off

112 Ignition Relay Fail is Off, should be On

101K2 Fail in K1

102Main Loop Fail in K2

103K1 Fail in Main Loop

Gas Valve Power Supply. (*WDPS Watch Dog Power Supply).

106WDPS Fail to be Off

107WDPS Fail to be Off

108WDPS Fail to be On

116Gas Valve Relay Fail is off, should be On

117Gas Valve Relay Fail is On, should be Off

Checks The ROM (Read Only Memory).

200 CRC Check Sum Error

Checks The CPU (Central Processing Unit).

201CPU Instruction Test Error

202CPU Instruction Test Error

203CPU Instruction Test Error

Checks the RAM (Random Access Memory). 205 RAM Test Fail

SW Check to see what the Last State it was in. ie., Fails if it can from the wrong place

125State Error

126State Error

128State Error

127State Error

129State Error

131State Error

132State Error

These State Numbers are not used.

230Executed State 3 (Not Implemented) h.s.

240Executed State 4 (Not Implemented) h.s

210Executed State 10 (Not Implemented) h.s.

213Executed State 13 (Not Implemented) h.s.

214Executed State 14 (Not Implemented) h.s.

216Executed State 16 (Not Implemented) h.s.

FAULT CONDITIONS

The controller is set up to provide additional status indicators under Fault Conditions. The following figures are possible Fault Conditions.

NO INCOMING LINE VOLTAGE. See Figure 18.

Line LED Off

NO INCOMING LINE VOLTAGE, Line LED Off

FIGURE 18.

 

 

 

 

 

 

 

 

Possible Cause

Remedy

 

 

1.

No Input Power

1.

Apply Power

 

 

2.

Wiring Disconnected

2.

Check all wiring

 

 

3.

One or more wiring receptacles 3.

Reconnect plugs on control,

 

 

 

disconnected from control

 

confirm all are fully seated

 

 

4.

LED burned out

4.

Ignore or replace control

 

 

 

 

 

 

 

 

 

 

 

 

 

NO LOW VOLTAGE. See Figure 19.

24V AC LED Off

NO LOW VOLTAGE, 24V AC LED Off

FIGURE 19.

NOTE: The transformer is of Class II variety and has an internal non- replaceable fuse. If blown, a problem may exist with the control which is affecting the transformer. In such cases, the control should be replaced as well.

 

 

 

 

 

 

 

 

Possible Cause

 

Remedy

 

 

1.

Transformer wiring problem

1.

Repair Wiring

 

 

2.

Defective Transformer

2.

Replace Transformer

 

 

3.

LED burned out

3.

Ignore or replace control

 

 

 

 

 

 

 

 

 

 

 

 

 

TEMPERATURE PROBE FAULT. See Figure 20.

Water Temp LED Flashing

TEMPERATURE PROBE FAULT, Water Temp LED Flashing

FIGURE 20.

This condition accommodates multiple failure modes. To more accurately determine the cause of failure, press the push-button on the display board.

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Contents Cyclone XHE Model BTH 300A and 400A Foreword ROUGH-IN-DIMENSIONSGAS Valve Piping Features Table of ContentsHorizontal Sidewall Venting Vertical Rooftop Venting Quick Installation TipsHigh Limit Switch E.C.O Water Temperature Setpoint Adjustment ProcedureDishwashing Machine Requirement Insulation Blankets Installation InstructionsCirculating Pump Required AbilityConfined Space ClearancesHard Water Unconfined SpaceCanadian Direct Vent US Direct VentCanadian Horizontal Vent US Horizontal VentVent Pipe Termination Direct Vent Terminal InstallationDirect Venting Vertical Vent Terminal Installation Installation SequenceVent Length Table Installation of Vent SystemBlocked Inlet Prover Switch Controls and SwitchesBlower Prover Switch Blocked Outlet Prover SwitchGAS Piping HOT Surface IgniterConnection of GAS Pipe System Connections Heater Wiring Page GAS Valve LED Flashing Self Diagnostic ControllerOperation Sequence of OperationFault Conditions Error CodesECO Switch OPEN. See Figure Operating Instructions Adjustment Procedure Initial START-UPPrior to Start UP Required Ability What to do if YOU Smell GAS Operating InstructionsGeneral Information Sediment Removal Maintenance ScheduleFlushing DrainingDrain Valve and Access Panels Powered Anode SystemPowered Anode Operation Power Supply LED MeaningsInstallation Diagrams Install in Accordance with Local Codes Must be Identical Heaters Install in Accordance with Local Codes Page Manifold Kits Water Heater Makes Sounds Burner Operational ProblemsNot Enough or no HOT Water Water is TOO HOTMotor RUNS, Burner Lights Momentarily Then Locks OUT Motor will not RUNNoisy Burner Operation Replacement PartsGAS Fails to Shut OFF Model BTH Limited Warranty

BTH 300A, BTH 400A specifications

A.O. Smith has established itself as a leader in the water heating industry, offering a range of products that combine efficiency, reliability, and innovative technology. Among these products, the BTH 300A and BTH 400A models stand out for their advanced features and robust performance, catering to both residential and commercial needs.

The BTH 300A and BTH 400A are high-efficiency water heaters designed with cutting-edge condensing technology, allowing for significant energy savings compared to traditional water heating systems. These models utilize a modulating gas valve that adjusts the burner operation based on the demand for hot water. This smart system not only enhances efficiency but also ensures a consistent supply of hot water without the worry of fluctuations.

One of the standout features of the BTH series is its compact design. Both the BTH 300A and BTH 400A are engineered to fit into smaller spaces, making them ideal for properties with limited installation areas. Their lightweight construction and user-friendly installation features further simplify the process, ensuring that homeowners and professionals alike can set them up with ease.

The BTH models are equipped with advanced control systems that offer precise temperature adjustment capabilities. Users can easily customize their hot water settings to meet specific household or business requirements. This adaptability is supported by the built-in digital display, which provides real-time information about the operating status of the unit.

Safety is a key consideration in the design of the BTH 300A and BTH 400A. They feature a robust set of safety mechanisms, including temperature lockout and venting safeguards, ensuring reliable operation and peace of mind for users. A.O. Smith also understands the importance of longevity in water heaters, and these models are built with high-quality materials, making them resistant to corrosion and wear over time.

In terms of performance, both the BTH 300A and BTH 400A models deliver exceptional heating capabilities, capable of meeting high demands while maintaining efficiency. With customer satisfaction at the forefront, A.O. Smith backs these units with an extensive warranty, demonstrating their commitment to quality and long-term performance.

In summary, the A.O. Smith BTH 300A and BTH 400A water heaters exemplify the marriage of innovation and functionality. With their energy-efficient operation, customizable settings, compact design, and advanced safety features, these models are a compelling choice for those in need of reliable and effective hot water solutions.