Table 31 — Perfect Humidity™ Dehumidification System Subcooling Mode Service Analysis

PROBLEM

CAUSE

 

REMEDY

Subcooling Mode (Liquid Reheat)

No power to control transformer from

Check power source and evaporator-fan relay. Ensure all wire

Will Not Energize.

evaporator-fan motor.

connections are tight.

 

No power from control transformer to liquid

1.

Fuse open; check fuse. Ensure continuity of wiring.

 

line solenoid valve.

2.

Low-pressure switch open. Cycle unit off and allow low-

 

 

 

pressure switch to reset. Replace switch if it will not close.

 

 

3.

Transformer bad; check transformer.

 

Liquid line solenoid valve will not operate.

1.

Solenoid coil defective; replace.

 

 

2.

Solenoid valve stuck open; replace.

 

Liquid line solenoid valve will not open.

Valve is stuck closed; replace valve.

Low System Capacity.

Low refrigerant charge or frosted evapora-

1.

Check charge amount. Charge per Fig. 51-53.

 

tor coil.

2.

Evaporator coil frosted; check and replace low-pressure

 

 

 

switch if necessary.

Loss of Compressor Superheat

Thermostatic expansion valve (TXV).

1.

Check TXV bulb mounting, and secure tightly to suction line.

Conditions with Subcooling/Reheat

 

2.

Replace TXV if stuck open or closed.

Dehumidification Coil Energized.

 

 

 

Table 32 — Perfect Humidity Dehumidification Hot Gas Reheat Mode Service Analysis

PROBLEM

CAUSE

 

REMEDY

Reheat Mode Will Not Energize.

No power to control transformer from

Check power source and evaporator-fan relay. Ensure all wire

 

evaporator-fan motor.

connections are tight.

 

No power from control transformer to hot

1.

Fuse open; check fuse. Ensure continuity of wiring.

 

gas line solenoid valve.

2.

Low-pressure switch open. Cycle unit off and allow low-

 

 

 

pressure switch to reset. Replace switch if it will not close.

 

 

3.

Transformer bad; check transformer.

 

Hot gas line solenoid valve will not operate.

1.

Solenoid coil defective; replace.

 

 

2.

Solenoid valve stuck closed; replace.

 

Low refrigerant charge or frosted evapora-

1.

Check charge amount. Charge per Fig. 51-53.

 

tor coil.

2.

Evaporator coil frosted; check and replace low-pressure

 

 

 

switch if necessary.

Loss of Compressor Superheat

Thermostatic expansion valve (TXV).

1.

Check TXV bulb mounting, and secure tightly to suction line.

Conditions with Subcooling/Reheat

 

2.

Replace TXV if stuck open or closed.

Dehumidification Coil Energized.

 

 

 

Excessive Superheat.

Liquid line solenoid valve will not operate.

Valve is stuck; replace valve.

 

Hot gas line solenoid valve will not close.

Valve is stuck; replace valve.

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Bryant 551B Subcooling Mode Liquid Reheat, Will Not Energize, Low System Capacity, Loss of Compressor Superheat

551B specifications

The Bryant 551B and 551C are two highly efficient air conditioning units designed to provide optimal comfort in residential settings. Known for their reliability and performance, these models are part of Bryant's esteemed line of heating and cooling solutions.

One of the standout features of the Bryant 551B is its two-stage cooling system, which allows for better humidity control and increased comfort. This ensures that homeowners can enjoy consistent temperatures while reducing energy consumption. The unit operates quietly, thanks to its noise-reducing technology, making it an ideal choice for bedrooms and living spaces.

On the other hand, the Bryant 551C builds upon this foundation with its variable-speed compressor. This technology allows the unit to adjust its cooling output according to the specific needs of the home. This results in seamless operation and even greater energy efficiency. Both models also incorporate Bryant's advanced control capabilities, which allow users to monitor and adjust settings remotely via smart devices, adding a layer of convenience and modernity to home climate control.

With an emphasis on durability, both the 551B and 551C feature a galvanized steel cabinet that protects against weather-related damage. The powder coat finish further enhances their resistance to rust and corrosion, ensuring a long lifespan and minimal maintenance.

Another significant characteristic of these units is their excellent Seasonal Energy Efficiency Ratio (SEER) ratings. The 551B boasts a SEER rating of up to 16, while the 551C takes it even further with ratings exceeding 20. This efficiency not only translates to lower energy bills for homeowners but also contributes to a reduced carbon footprint, making these units environmentally friendly options.

Both models are also designed to operate with eco-friendly refrigerants, aligning with modern energy standards and regulations aimed at reducing greenhouse gas emissions.

In summary, the Bryant 551B and 551C are exemplary choices for homeowners looking for reliable, efficient, and high-performing air conditioning solutions. With features such as two-stage and variable-speed compressors, advanced smart technology, and robust construction, these models stand out in the competitive HVAC market. They promise a comfortable indoor environment along with significant energy savings, making them a wise investment for the future.