Bryant Air Conditioning

The limit circuit has detected a potentially unsafe condition, likely overheating, and has locked out the system. The system will use heat pump heating if available.

The system has failed to ignite the burner after multiple attempts. The system will use heat pump heating if available.

This code indicates a problem with the blower motor, preventing airflow. The ventilator, humidifier, dehumidifier, and outdoor unit will be turned off.

The system has locked out gas heating operation. The system will use heat pump heating if available.

The system is not reliably detecting a flame when it should be. This can lead to the system shutting down for safety.

The pressure switch, which monitors airflow, did not return to its 'open' state as expected. This may indicate an airflow restriction or a faulty switch.

A fuse related to the secondary voltage circuit has blown. This indicates a potential electrical issue within that circuit.

The system has detected an incorrect or incompatible model plug in the outdoor unit. This prevents the unit from operating.

A fault has been detected in the limit circuit specifically when the system is operating in high heat mode. High heat operation will be disabled.

This code indicates a fault where the heater is detected as being on even when it should not be receiving power. This can affect heating performance and safety.

This fault signifies an issue with the blower motor. When this occurs, the ventilator, humidifier, dehumidifier, and outdoor unit will shut off.

This fault indicates an issue with the blower motor specifically when the system is in cooling mode. The ventilator, humidifier, dehumidifier, and outdoor unit will be turned off.

This error indicates a problem with communication between motors in the system. The ventilator, humidifier, dehumidifier, and outdoor unit will be turned off.

This code points to a failure within the system's control circuitry. This can prevent the system from operating correctly.

The outdoor unit is not receiving the expected 230-volt power supply. This will prevent the unit from operating.

The contactor, an electrical switch, is shorted. This means it is stuck in a closed position when it should be open, potentially causing continuous operation or damage.

The compressor in the outdoor unit is not receiving high voltage power. This prevents the compressor from running.

The system's low stage compressor has failed to start successfully after three attempts. This indicates a problem preventing low-stage operation.

The system's high stage compressor has failed to start successfully after three attempts. This indicates a problem preventing high-stage operation.

The low stage compressor has experienced a thermal lockout, meaning it has overheated and shut down. It will remain locked out for 4 hours.

The high stage compressor has experienced a thermal lockout due to overheating and will remain shut down for 4 hours.

The system has locked out due to low pressure in the refrigerant system. This typically indicates a refrigerant leak or other flow restriction. Lockout lasts 4 hours.

The system has locked out due to high pressure in the refrigerant system. This may indicate an issue with airflow or overcharging. Lockout lasts 4 hours.

The low stage contactor is stuck open, meaning it is not allowing power to reach the low stage components when it should.

The low stage contactor is shorted, meaning it is stuck closed and allowing power through when it should be open. This can cause continuous operation or damage.

The high stage contactor is stuck in the open position, failing to supply power to the high stage components.

The Evolution Control is unable to establish communication with the main indoor heating or cooling equipment. This message appears during the initial power-up sequence and must be resolved for the system to function.

This message appears if the Evolution Control cannot automatically detect an installed electric heater. This typically occurs with fan coil, packaged heat pump, or packaged AC systems that use electric heat.

The Evolution Control user interface is not turning on. This prevents system operation and control.

This indicates a fault related to the blower motor, likely due to a safety switch being opened. The system has logged this as a blower motor fault.

The system may have a frozen coil, which occurs when moisture in the air freezes on the indoor coil due to restricted airflow or low temperatures.

The relative humidity in the room has exceeded 80% for 30 minutes. The alert will clear when humidity drops below 78%.

The room temperature has exceeded 100°F for at least 10 minutes. The alert will clear when the temperature drops below 98°F.

The user interface is currently displaying 'IN SERVICE MODE'. This means a service tool is controlling the system, and the regular user interface is temporarily inactive.

There is a communication error between the main control unit and the indoor equipment. This prevents proper system operation.

The Evolution Control cannot detect the indoor unit. This communication error prevents the system from operating.

This event indicates that a low pressure condition has been detected within the system. This often relates to the refrigerant levels or airflow.

The room temperature has fallen below 38°F for at least 10 minutes. The alert will clear when the temperature rises above 40°F.

This error indicates a communication failure with the Network Interface Module (NIM). The NIM is responsible for network connectivity.

The system is not receiving data from a temperature sensor. This could be due to a failed sensor or a communication problem between the sensor and the control unit.

The Evolution Control cannot find or identify the outdoor unit (air conditioner or heat pump). This message appears during the initial power-up sequence if a communicating outdoor unit is installed but not detected.

The control system cannot communicate with the outdoor unit. This means the outdoor unit will not function.

The Evolution Control cannot detect the two-stage communicating outdoor unit. This communication failure stops the outdoor unit from operating.

A communication error has occurred with a packaged unit. This indicates a problem in the data exchange between components of the packaged system.

A communication error has been detected with the System Access Module (SAM). This module is crucial for system integration and control.

The system cannot accurately calculate the static pressure. It is automatically reducing the blower speed to compensate.

A general system malfunction has occurred, indicated on the main screen. A technician should check the 'Last 10 System Events' for specific fault codes.