TROUBLESHOOTING

The troubleshooting charts cover the error codes that the Intelli-VentTMcontrol can recognize, the potential cause, and those actions that may help repair the problem. The water heater manufacturer’s troubleshooting procedure should be consulted before attempting to repair the appliance. The wa- ter heater manufacturer’s instructions take priority over the instructions here.

If for any reason you question your ability, or feel any doubt about your ability to perform any of the troubleshooting pro- cedures or repairs recommended. STOP! Contact a trained and qualified service professional to repair the water heater.

To troubleshoot the system using the error code indicators:

1.Check that the system is currently active and calling for a request for heat. You can initiate a call for heat by either drawing hot water from a nearby faucet or raising the tem-

perature setting (see section “Temperature Regulation”). If you have noted an error code from a previous heating cycle, this step is not necessary, and you may proceed with the next step.

2.Refer to the troubleshooting charts on below to find the error code that is displayed. Check and repair those items recommended.

3.Once the repair is complete, again initiate a call for heat, and observe that the ignition sequence complies with that shown on page 6.

4.After the water heater repair is complete, return the water heater temperature setting to the original temperature. If for any reason you cannot remember the original setting, return the setting to the 120oF setpoint. See the section “Temperature Regulation” for assistance in setting the wa- ter temperature setting.

 

 

 

Error

Indication

Check, Repair, or Replace

 

 

 

 

 

 

A

B

C

 

An open earth ground cir-

1. Check that the earth ground conductor is properly

1

cuit to the ignition system

connected at the fuse box or breaker panel and the

 

 

 

 

 

 

 

 

water heater.

 

 

 

 

 

2. Check that the grounding conductors on the water

 

 

 

 

 

heater are properly connected and secure.

 

 

 

 

 

 

A

B

C

 

The self diagnostic test

1. Check for proper connection of the line neutral and

2

detected a wiring error or

line hot wires.

 

 

 

 

 

 

 

a high resistance to earth

2. Check that the appliance is securely connected to

 

 

 

 

ground

earth ground.

 

 

 

 

 

 

A

B

C

3

The pressure switch re-

1. The pressure switch wiring is incorrect.

 

 

 

mained closed longer than

2. The pressure switch is defective and must be

 

 

 

 

5 seconds after the call for

replaced.

 

 

 

 

heat began.

 

 

 

 

 

 

 

A

B

C

4

The pressure switch re-

1. The pressure switch wiring is incorrect.

mained open longer than 5

2. The pressure switch tubing is not connected cor-

 

 

 

 

 

 

 

seconds after the combus-

rectly.

 

 

 

 

tion blower was energized

3. Obstructions or restrictions in the water heater air

 

 

 

 

 

 

 

 

 

 

intake or exhaust flue.

A

B

C

The self diagnostic test has

1. Check that all wiring is correct and secure.

 

 

5

detected an error in the Hot

2. Disconnect the ignitor and measure the ignitor re-

 

 

 

Surface Ignitor circuit.

sistance with an accurate ohmmeter between pins

 

 

 

 

 

 

 

1 and 2. Resistance should be between 11.5 and

 

 

 

 

 

 

 

18.8 ohms. If the reading is incorrect, replace the

 

 

 

 

 

 

 

Hot Surface Ignitor.

 

 

 

 

 

 

 

3. If the above checks are good, replace the INTELLI-

 

 

 

1

2

3

4

VENTTM control.

A

B

C

6

The maximum number of

1. Check if the gas supply is off or too low to operate.

ignition retries or recycle

2. Check that the flame sense rod to see that it is

 

 

 

 

 

 

 

has been reached and the

located properly and free from contamination.

 

 

 

 

system is in lockout

Reposition the flame sense rod or lightly clean with

 

 

 

 

 

an abrasive cloth.

 

 

 

 

 

3. The Hot Surface Ignitor may not be positioned cor-

 

 

 

 

 

rectly. Reposition as necessary.

 

 

 

 

 

4. The Hot Surface Ignitor and Flame Sense Rod

 

 

 

 

 

wired correctly and in good working condition.

 

 

 

 

 

Repair as required.

 

 

 

 

 

5. Low voltage to the water heater. Check and repair.

7

Page 6 Page 8
Page 7
Image 7
White Rodgers 37E73A-906, 37E37A-903 & 906, 37E73A-903 Troubleshooting, Error Indication Check, Repair, or Replace
Page 6 Page 8

37E73A-903, 37E73A-906, 37E37A-903 & 906 specifications

Emerson 37E73A-903, 37E37A-903 & 906, and 37E73A-906 are advanced pressure transmitters known for their accuracy, reliability, and innovative technology. These devices are widely utilized in various industrial applications, including oil and gas, water treatment, and chemical processing, where precise measurement and monitoring of pressure are critical.

One of the main features of the Emerson 37E series is their robust construction, designed to withstand harsh environmental conditions. They are engineered with high-quality materials that provide durability and longevity, ensuring consistent performance over time. Their compact design allows for easy installation in tight spaces, making them versatile solutions for a range of process control systems.

The Emerson transmitters utilize advanced sensing technology that enhances accuracy and sensitivity. They offer a wide measurement range, capable of detecting both high and low-pressure levels. This capability enables operators to manage their processes more effectively, reducing the risk of system failures and operational downtime.

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The integration of digital communication protocols, such as HART and FOUNDATION Fieldbus, allows for seamless connectivity with control systems. This feature enables remote monitoring and configuration, facilitating real-time data collection and analysis. As a result, operators can make informed decisions quickly, optimizing their processes and enhancing operational efficiency.

Furthermore, the Emerson 37E series comes with various options for customization. Users can select from different pressure ranges, outputs, and materials to suit their specific application needs. This flexibility makes these transmitters highly adaptable, catering to a broad spectrum of industrial requirements.

In conclusion, Emerson's 37E73A-903, 37E37A-903 & 906, and 37E73A-906 transmitters embody state-of-the-art technology in pressure measurement. With their robust design, high accuracy, improved performance, and flexible communication options, they are reliable solutions for industries demanding precision and efficiency. Their adoption can significantly enhance process control, contributing to safer and more efficient operations in diverse applications.
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