Lennox mini split systems are a great way to provide compact, yet effective temperature control for your home. Some models are built for air conditioning only, while heat pump models can offer both heating and cooling.
But no ductless mini split is flawless. There’s always a possibility your mini split will malfunction. To identify what is malfunctioning, you’ll want to locate where the mini split error codes are displayed. Understanding what these codes mean can help you kickstart mini split repair, especially if professional help is required.
What any code means will ultimately depend on the specific model of your mini split system. You can consult your manual for a guide for what each code means. You can also trust the HVAC pros at US Air Heating and Cooling. Our technicians are trained to recognize these codes in order to deliver prompt mini split repair in Rock Hill. Give us a call at 803-220-0761 to request an appointment.
Common Lennox Mini Split Error Codes
While error codes can differ from model to model, there are some codes you’ll be more likely to see. To learn what your error code may mean, ask yourself the following:
- Is your system a mini split air conditioner or a mini split heat pump?
- Are there clear signs of what malfunctioned? A loud noise coming from a specific component, for example.
Here are a handful of the more common error codes for Lennox mini splits.
E1 – Indoor / Outdoor Unit Communication
In general, an E1 error code indicates that communication between the mini split system’s indoor and outdoor units has been impeded. It might be experiencing intermittent connection issues or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will not be able to effectively balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error can indicate a problem with the system’s voltage. A repair technician from US Air Heating and Cooling may refer to it as overcurrent protection. Both very high or low voltage can produce this error code.
For mini split air conditioners, this code can also stand for voltage issues. In other cases, it’s alerting you to a circuit problem with the outdoor temperature sensor.
E6 – Indoor / Outdoor Unit Communication
An E6 error code can also refer to a communication problem between the two units, similar to an E1 code. It could also be an issue with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will generally be related to your mini splits compressor system, housed within the outdoor unit. When the compressor drive is not working, the most likely cause is excessively high temperatures. A high temperature at the discharge line may also lead to a P4 code.
P6 – Compressor Switch Open or Drive Board Failure
Your mini split system will have computer boards that make sure the indoor and outdoor units can communicate with one another. If the drive board is faulty, a P6 error code is common.
When temperatures rise above safe levels, a safety switch should protect the electrical components of your mini split system, including any components that manage the outdoor compressor. If this switch is open, the P6 code could appear. You may also find the P6 code if the compressor is struggling with high or low pressure issues.
Check the Manual for Your Specific Model
Remember that in general, error codes are specific to each model of a Lennox mini split system. Your manual will provide a guide for these error codes and what they should mean. But as many of these codes refer to electrical problems, professional experience is typically necessary.
Call US Air Heating and Cooling for Mini Split Repair
US Air Heating and Cooling can provide fast and affordable ductless mini split repair. Whether you own a mini split AC system or a mini split heat pump, our technicians can quickly identify your specific problem.
For some problems, repairs might not be worth it. But that doesn’t mean the mini split replacement process has to be stressful. We can provide equally effective mini split installation in Rock Hill, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 803-220-0761 today.