Troubleshooting

AUTOMATIC RESET HIGH LIMIT CONTROL (LS)

Located in the burner compartment on the heat exchanger, its sensing element projects through the blower section bulk- head and senses the temperature at the rear of the furnace. It will cycle the furnace off if the temperature exceeds 100°F plus maximum rise.

AUTOMATIC RESET HIGH LIMIT CONTROL (ALS)

Located in the blower compartment on the blower housing, it senses air temperature within the blower compartment and protects the filters from excessive temperature. It will shut down the furnace if it senses excessive temperatures.

MANUAL RESET FLAME ROLLOUT CONTROL (RS)

Located in the burner compartment at the top of the burner assembly, it senses high temperature that could occur if the heat exchanger tubes were plugged and the flame was roll- ing out instead of entering the tubes. It has a manual push- button reset that cannot be actuated until the limit control has cooled.

IGNITION CONTROL ERROR CODES

The following presents probable causes of questionable unit operation. Refer to Diagnostic Indicator Chart for an inter- pretation of the signal and to this section for an explanation.

Remove the control box access panel and note the number of diagnostic LED flashes. Refer to Diagnostic Indicator Chart for an interpretation of the signal and to this section for an explanation.

ABNORMAL OPERATION - HEATING

Internal Control Failure

If the integrated ignition control in this unit encounters an in- ternal fault, it will go into a “hard” lockout and turn off the diagnostic LED. If diagnostic LED indicates an internal fault, check power supply to unit for proper voltage, check all fuses, circuit breakers and wiring. Disconnect electric power for five seconds. If LED remains off after restoring power, re- place control.

External Lockout

An external lockout occurs if the integrated ignition control determines that a measurable combustion cannot be estab- lished within three (3) consecutive ignition attempts. If flame is not established within the seven (7) second trial for igni- tion, the gas valve is deenergized, 15 second inter-purge cycle is completed, and ignition is reattempted. The control will repeat this routine three times if a measurable combustion is not established. The control will then shut off the induced draft blower and go into a lockout state.

If flame is established but lost, the control will energize the circulator blower at the heat speed and then begin a new ignition sequence. If flame is established then lost on subse- quent attempts, the control will recycle for four (4) consecu- tive ignition attempts (five attempts total) before locking out. 20

The diagnostic fault code is 1 flash for a lockout due to failed ignition attempts or flame dropouts. The integrated control will automatically reset after one hour, or it can be reset by removing the thermostat signal or disconnecting the electri- cal power supply for over five seconds. If the diagnostic LED indicates an external lockout, perform the following checks:

•Check the supply and manifold pressures

•Check the gas orifices for debris

•Check gas valve for proper operation

•Check secondary limit

A dirty filter, excessive duct static, insufficient air flow, a faulty limit, or a failed circulator blower can cause this limit to open. Check filters, total external duct static, circulator blower motor, blower motor speed tap (see wiring diagram), and limit. An interruption in electrical power during a heating cycle may also cause the auxiliary limit to open. The automatic reset secondary limit is located on top of the circulator blower assembly.

•Check rollout limit

If the burner flames are not properly drawn into the heat exchanger, the flame rollout protection device will open. Possible causes are restricted or blocked flue passages, blocked or cracked heat exchanger, a failed induced draft blower, or insufficient combustion air. The rollout protection device is a manual reset limit located on the burner bracket. The cause of the flame rollout must be determined and corrected before resetting the limit.

•Check flame sensor

A drop in flame signal can be caused by nearly invisible coating on the sensor. Remove the sensor and carefully clean with steel wool.

•Check wiring

Check wiring for opens/shorts and miswiring.

IMPORTANT: If you have to frequently reset your gas/electric package unit, it means that a problem exists that should be corrected. Contact a qualified servicer for further information.

Pressure Switch Stuck Open

A pressure switch stuck open can be caused by a faulty pres- sure switch, faulty wiring, a disconnected or damaged hose, a blocked or restricted flue, or a faulty induced draft blower.

If the control senses an open pressure switch during the pre- purge cycle, the induced draft blower only will be energized. If the pressure switch opens after ignition has begun the gas valve is deenergized, the circulator blower heat off cycle be- gins, and the induced draft blower remains on. The diagnos- tic fault code is two flashes.

Pressure Switch Stuck Closed

A stuck closed pressure switch can be caused by a faulty pressure switch or faulty wiring. If the control encounters a pressure switch stuck closed, the induced draft blower re- mains off. The diagnostic LED code for this fault is three (3) flashes.

ANSI Z21.47CSA-2.3 specifications

Goodman Manufacturing's ANSI Z21.47/CSA 2.3 standard is pivotal in ensuring safety and performance in gas appliances and their components. This industry benchmark outlines rigorous safety regulations for residential gas conversion appliances, specifically focusing on categories like storage water heaters, pool heaters, and certain types of boilers.

One of the main features of Goodman’s offering under this standard is its emphasis on user safety. The ANSI Z21.47/CSA 2.3 certification mandates the implementation of robust safety mechanisms to prevent accidents associated with gas leaks or malfunctions. This includes enhanced safety controls and features that mitigate the risk of combustion-related incidents, ensuring peace of mind for both manufacturers and consumers.

Technologically, Goodman Mfg has integrated advanced electronic ignition systems into its products, eliminating the need for pilot lights while enhancing energy efficiency. This technology not only reduces the risk of accidental fires but also contributes to lower energy consumption, making it an environmentally friendly option. Additionally, models compliant with this standard often incorporate smart technology, allowing for remote monitoring and control. This feature further enhances user convenience and energy management, granting homeowners the ability to optimize their energy usage.

In terms of construction and design characteristics, Goodman’s appliances are built to withstand varied operating conditions. They are designed with high-quality materials that provide durability and reliability over time, essential for maintaining performance and safety. These appliances typically feature built-in corrosion protection mechanisms to prolong their lifespan, especially in humid or corrosive environments.

Moreover, Goodman’s adherence to the ANSI Z21.47/CSA 2.3 standard signifies their commitment to energy efficiency, aligning with modern-day sustainability goals. Appliances that meet this standard often exceed governmental energy efficiency mandates, making them a wise investment for consumers aiming to reduce their carbon footprint while enjoying high-performance utility.

In conclusion, Goodman Manufacturing’s adherence to ANSI Z21.47/CSA 2.3 marks a significant dedication to safety, efficiency, and innovation in the gas appliance sector. Through advanced technologies, robust safety features, and a commitment to user satisfaction, Goodman continues to set the standard for excellence in home heating and water heating solutions.