vice, you will have ready access to the information needed by your service representative.

This furnace has an LED operation and fault code display to aid the installer, service technician, or home- owner while installing or servicing the

unit. The LED code can be seen by removing the access door and viewing LED(s) through the view port in the blower access panel.

NOTE: Removing the blower access panel or turning off the 115-v electrical

power supply will terminate LED diag- nostic code display.

To decipher the meaning of the LED code, and suggested action, the follow- ing cross-reference can be used.

MODEL 345MAV DIAGNOSTIC CHART

 

 

 

 

(See Fig. 2.)

 

 

 

 

 

FAULT

 

 

 

 

CODE

FAULT CODE DESCRIPTION

CHECKLIST

 

 

 

 

 

13 or 33

Limit Switch Lockout

 

 

Check for dirty air filter.

 

 

 

 

Check for blocked return-air or supply-air grilles.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check to be sure manual shutoff valve in gas supply pipe is in the open position. (Follow

 

 

 

 

 

 

 

 

start-up procedure if you open gas line.)

14 or 34

Ignition Lockout or

 

 

NOTE: Turn off the electrical supply and remove access doors before continuing with this

Ignition Proving Fault

 

 

checklist.

 

 

 

 

 

 

 

Check to be sure control switch or knob on gas valve is in ON position. (Follow start-up

 

 

 

 

 

 

 

 

procedures if you must reset switch or knob to ON position.)

 

 

 

 

 

24

Furnace Fuse Open

 

 

Check for blown fuse and possible short in 24-v wiring.

 

 

 

 

 

 

 

 

 

 

 

Check to make sure that all PVC pipes leading into the combustion-air intake and vent/

 

 

 

 

31

Pressure Switch Not Closed

 

 

exhaust are free from any cracks and sags. Also check the combustion-air intake adjacent to

 

 

 

 

the furnace and vent/exhaust pipe on the outside of your home for blockage.

 

 

 

 

 

12, 21, 22,

Any Other Fault Code

 

 

Call dealer for service.

or 23

 

 

 

 

 

 

 

 

 

 

 

 

 

No Fault

Furnace Fails to Operate and No

 

 

Check thermostat for proper temperature setting.

 

 

Code

 

 

Check for blown fuses and circuit breakers.

Fault is Signaled

 

 

 

 

Signaled

 

 

Check to be sure blower access panel is properly in place.

 

 

 

 

 

 

 

 

 

 

 

NOTES:

1.Light on continuously means control has power and working properly.

2.The fault code is a 2 digit number. The first digit is determined by the number of short flashes of the light and the second digit is determined by number of long flashes of the light.

10

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Image 10
Bryant manual Model 345MAV Diagnostic Chart, See Fig
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345MAV specifications

The Bryant 345MAV is a premier choice in the realm of residential heating and cooling systems, encapsulating advanced technologies, high efficiency, and remarkable performance. Designed for homeowners seeking reliability and comfort, this model exemplifies modern HVAC (Heating, Ventilation, and Air Conditioning) innovations.

One standout feature of the Bryant 345MAV is its impressive energy efficiency. With a high SEER (Seasonal Energy Efficiency Ratio) rating, it operates at peak levels while consuming less energy. This not only reduces utility bills but also supports environmental sustainability, making it an ideal selection for eco-conscious consumers. The model employs variable-speed technology, which allows the system to adjust its output based on current heating and cooling needs. As a result, it provides consistent indoor comfort while minimizing temperature fluctuations.

The Bryant 345MAV incorporates advanced refrigerant technologies designed for optimal performance. It uses R-410A refrigerant, which is known for its lower environmental impact compared to traditional refrigerants like R-22. This environmentally friendly aspect aligns with regulations aimed at reducing ozone depletion, thereby promoting a greener approach to heating and cooling.

Reliability is another hallmark of the Bryant 345MAV. Engineered with precision, this model features a durable build designed to withstand varying weather conditions. The system is equipped with a robust compressor that is engineered for longevity and minimal noise during operation. Homeowners will appreciate the quiet performance of the 345MAV, ensuring peace in their living spaces.

Comfort also extends to the user experience with the inclusion of a smart thermostat option. This integration allows homeowners to manage their heating and cooling systems remotely, enhancing convenience and control. Programmable settings can optimize energy use based on individual schedules, facilitating both comfort and savings.

In summary, the Bryant 345MAV is a top-tier solution for residential climate control, blending energy efficiency, innovative technology, and unmatched reliability. With its variable-speed operation, environmentally friendly refrigerant, and smart features, the 345MAV represents a significant advancement in the HVAC field. Homeowners investing in this model can expect a system that not only meets their heating and cooling needs but exceeds them in terms of efficiency and comfort.
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