GAS-FIRED HEATER Installation Manual

PART 14: TROUBLESHOOTING

A. MUNCHKIN ERROR CODE

An error code may occur in the installation of the Munchkin Contender. This condition may lead to a lock out condition of the controller, which will need to be manually reset through the S4/Reset button. These temporary codes will help the installer correct the problem before going into a lock out condition, which will require a manual reset.

B.HEATER ERROR

1.When an error condition occurs the controller will display an error code on the display module.

2.These error codes and several suggested corrective actions are included in Table 14-1.

3.In the case of E00, E13, and E14 this error, if uncorrected, will go into a fault condition as described is Paragraph C (Heater Fault).

C.HEATER FAULT

WARNING

When servicing or replacing any components of this heater be certain that:

•The gas is off.

•All electrical power is disconnected

DANGER

When servicing or replacing that are in direct contact with the heater water, be certain that:

•There is no pressure in the heater. (Pull the release on the relief valve. Do not depend on the pressure gauge reading).

•The heater water is not hot

•The electrical power is off

WARNING

Do not use this appliance if any part has been under water. Improper or dangerous operation may result. Contact a qualified service technician immediately to inspect the heater and to repair or replace any part of the heater which has been under water.

1.When a fault condition occurs the controller will illuminate the red “fault” indication light and display a fault code in the format (Example: F00) on the display module.

2.Note the fault code and refer to Table 14-2 for an explanation of the fault code along with several suggestions for corrective actions.

3.Press the reset key to clear the fault and resume operation. Be sure to observe the operation of the unit to prevent a recurrence of the fault.

Table 14-1 : 925 Control Board ERROR Codes

CAUTION

This appliance has wire function labels on all internal wiring. Observe the position of each wire before re- moving it. Wiring errors may cause improper and dan- gerous operation. Verify proper operation after servicing.

CAUTION

If overheating occurs or the gas supply fails to shut off, do not turn off electrical power to the circulating pump. This may aggravate the problem and increase the likelihood of heater damage. Instead, shut off the gas supply to the heater at the gas service valve.

Code

Description

Duration

 

Corrective Action

 

 

 

 

 

 

Combustion Fan Speed Low.The

 

1.

Check the combustion air fan wiring.

E13

heater combustion air fan speed less

60 Sec.

2.

Replace the combustion air fan.

„

than 70% of expected.

 

3.

Replace the control board.

 

Combustion Fan Speed High. The

 

1.

Check the combustion air fan wiring.

E14

heater combustion air fan speed is

60 Sec.

2.

Replace the combustion air fan.

„

more than 130% of expected.

 

3.

Replace the control board.

PR0

Water Pressure Switch Open

Until

1.

Assure that the system pressure is above 10 psig.

Corrected

2.

Check for leaks in the system piping.

„

 

 

 

Until

1.

Assure that the vent is not blocked

FLU

Blocked Vent Pressure Switch Open

2.

Check the switch operation by applying a jumper. (If

Corrected

„

 

 

the switch is not functioning properly, replace it.)

 

 

 

 

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Munchkin Gas-Fired Hot Water Circulating Heater installation manual Munchkin Error Code, Heater Error, Heater Fault
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Gas-Fired Hot Water Circulating Heater specifications

The Munchkin Gas-Fired Hot Water Circulating Heater is a cutting-edge heating solution designed to provide efficient and reliable hot water for residential and commercial applications. Renowned for its compact design and innovative technology, the Munchkin heater combines performance with energy efficiency, making it an ideal choice for those seeking comfort and cost savings.

One of the main features of the Munchkin heater is its modulating burner. This technology intelligently adjusts the heating output based on the demand for hot water, ensuring that energy is not wasted. This leads to lower energy bills and a reduction in environmental impact, as the system only uses the necessary resources to maintain desired water temperatures.

Another notable characteristic is its high-efficiency rating. The Munchkin heater operates with an impressive annual fuel utilization efficiency (AFUE) of up to 95%. This means that the majority of the fuel consumed is converted into usable heat. By maximizing energy utilization, homeowners can enjoy a significant reduction in utility costs while minimizing emissions.

The compact size of the Munchkin Gas-Fired Hot Water Circulating Heater is another significant advantage. It is designed to fit into tight spaces, making it suitable for homes where space is at a premium. This compact design does not compromise performance; instead, it enhances installation flexibility, allowing for placement in basements, closets, or utility rooms.

Munchkin heaters are equipped with advanced control systems that offer enhanced convenience. The digital display and programmable settings allow users to set their preferred temperatures and schedules. This feature not only enhances user comfort but also optimizes energy usage, as water is heated only when necessary.

Safety is also a top priority with Munchkin products. The heater includes built-in safety features such as flame monitoring systems, automatic shut-off capabilities, and pressure relief valves, providing peace of mind for users.

In summary, the Munchkin Gas-Fired Hot Water Circulating Heater is a high-efficiency, compact, and innovative solution for hot water needs. With its modulating burner, high-efficiency rating, advanced control systems, and safety features, it stands out as a reliable choice for those looking to invest in heating technology that prioritizes energy conservation and performance. This heater is truly a forward-thinking solution for modern hot water requirements.
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