Manuals / A.O. Smith / Household Appliance / Water Heater

A.O. Smith BTH 120-250(A) warranty GAS Valve LED Flashing, Fault Conditions, No LOW Voltage Figure

Models: BTH 120-250(A)

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GAS VALVE LED FLASHING

This condition results from a failure to establish burner ignition after three successive trials. In such cases:

1.Investigate the possible cause and remedy any observations.

2.Momentarily depress the button on the display panel to reset the lockout condition.

3.Confirm proper appliance operation.

 

 

 

 

 

 

 

 

Possible Cause

 

Remedy

 

 

1.

Burner ground wire broken

1.

Check wire and connection

 

 

 

or corroded

 

at burner

 

 

2.

Connectors unplugged

2.

Check connections

 

 

3.

Igniter broken

3.

Replace igniter

 

 

4.

Flame probe faulty

4.

Replace flame probe

 

 

5.

Gas shut off

5.

Turn on gas supply

 

 

6.

Clogged gas valve

6.

Replace gas valve

 

 

7.

Faulty gas valve

7.

Replace gas valve

 

 

8.

Defective control

8.

Replace control

 

 

9.

Burner improperly adjusted

9.

Adjust burner

 

 

10.

Dirty burner

10.

Clean burner

 

 

 

 

 

 

 

FAULT CONDITIONS

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

NO INCOMING LINE VOLTAGE (Figure 19) Line LED Off

NO INCOMING LINE VOLTAGE, Line LED Off

FIGURE 19

 

 

 

 

 

 

 

 

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 (Figure 20)

24V AC LED Off

NO LOW VOLTAGE, 24V AC LED Off

FIGURE 20

 

 

 

 

 

 

Possible Cause

 

Remedy

 

 

1.Blower 24 VAC Fuse

1.

Replace 24 VAC 3a Fuse

 

 

 

 

(Littlefuse 257003 automotive fuse).

 

 

2.Defective Transformer

2.

Replace Transformer

 

 

3.LED burned out

3.

Ignore or replace control

 

 

 

 

 

 

 

 

 

 

 

TEMPERATURE PROBE FAULT (Figure 21)

Water Temp LED Flashing

TEMPERATURE PROBE FAULT, Water Temp LED Flashing

FIGURE 21

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

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A.O. Smith BTH 120-250(A) warranty GAS Valve LED Flashing, Fault Conditions, No Incoming Line Voltage Line LED Off
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BTH 120-250(A) specifications

A.O. Smith BTH 120-250(A) is a cutting-edge water heater designed to meet the demands of residential and commercial settings. This high-efficiency unit is equipped with a range of features aimed at maximizing performance and minimizing energy consumption, making it a popular choice among homeowners and builders alike.

One of the standout features of the A.O. Smith BTH 120-250(A) is its energy efficiency. It operates with a thermal efficiency rating of up to 96%, which means that a significant portion of the fuel consumed is converted into usable hot water. This not only reduces energy bills but also lessens the environmental impact of water heating.

The unit employs advanced condensing technology, which captures and utilizes the heat from flue gases that would otherwise be lost in traditional units. This technology allows for lower exhaust temperatures and the potential for venting through PVC, significantly simplifying installation in various settings.

With a capacity range of 120 to 250 gallons, the BTH series is versatile enough to serve different needs. It is suitable for multiple applications, including large residential homes, commercial businesses, and industrial installations. The varying sizes ensure that it can deliver adequate hot water supply, even during peak demand periods.

In addition to its impressive capacity and efficiency, the A.O. Smith BTH 120-250(A) features a user-friendly digital control system. This allows users to easily set and monitor water temperatures, helping to prevent scalding and ensuring consistent comfort. The integrated diagnostics system alerts users to potential issues, facilitating proactive maintenance and reducing downtime.

Another appealing characteristic of this water heater is its durable construction. Built with high-quality materials, it is designed to withstand the rigors of frequent use while maintaining optimal performance over time. Furthermore, it comes equipped with an innovative flame rollback feature, enhancing safety by reducing the risk of flashback.

Overall, the A.O. Smith BTH 120-250(A) stands out in the competitive water heater market due to its exceptional efficiency, advanced technologies, and robust construction. Whether for residential or commercial use, this model provides reliable hot water supply while promoting energy savings and environmental sustainability. Its combination of performance and user-friendly features makes it a top choice for those seeking a reliable water heating solution.