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 deliver both heating and cooling.
But no ductless mini split is flawless. There’s always a possibility your mini split can malfunction. To identify what went wrong, you’ll want to locate where the mini split error codes are displayed. Understanding what these codes refer to can help you kickstart mini split repair, especially if professional help is needed.
What any code means will ultimately depend on the specific model of your mini split system. You can review your manual to find a guide for what each code means. You can also call the HVAC pros at Air-Right Energy Design, Inc.. Our technicians are trained to learn these codes in order to ensure prompt mini split repair in Manassas. Give us a call at 703-260-1148 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 identify what your error code might mean, consider the following:
- Is your model a mini split air conditioner or a mini split heat pump?
- Are there additional signs of what is happening? A loud noise coming from an important 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 means that communication between the mini split system’s indoor and outdoor units has been impeded. It might be struggling with intermittent connection issues or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will be unable to adequately balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error could refer to a problem with the system’s voltage. A repair technician from Air-Right Energy Design, Inc. may refer to it as overcurrent protection. Both very high or low voltage can result in this error code.
For mini split air conditioners, this code can also represent 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 might also be a problem with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will most times be concerned with your mini splits compressor system, found within the outdoor unit. When the compressor drive is malfunctioning, the most likely reason is excessively high temperatures. A high temperature at the discharge line could 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 exceed safe levels, a safety switch will 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 concerns.
Check the Manual for Your Specific Model
Remember that in general, error codes are different for each model of a Lennox mini split system. Your manual will provide a guide for these error codes and what they should mean. But because many of these codes refer to electrical problems, professional experience is usually necessary.
Call Air-Right Energy Design, Inc. for Mini Split Repair
Air-Right Energy Design, Inc. can deliver 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 diagnose your unique 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 Manassas, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 703-260-1148 today.