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 risk your mini-split can malfunction. To find out what went wrong, you’ll want to locate where the mini-split error codes are displayed. Knowing what these codes refer to can help you kick-start mini-split repair, especially if professional help is required.
What each code means will ultimately rely on the specific model of your mini-split system. You can review your manual for a guide for what each code means. You can also call the HVAC pros at Air Concepts of Middle Georgia. Our technicians are trained to learn these codes in order to ensure prompt mini-split repair in Milledgeville and Middle Georgia. Give us a call at 478-200-5689 to request an appointment.
Common Lennox Mini-Split Error Codes
While error codes will differ from model to model, there are some codes you’ll be more likely to come across. To learn what your error code can 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 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 indicates that communication between the mini-split system’s indoor and outdoor units has been impeded. It may be experiencing intermittent connection problems or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will be unable to effectively balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini-split heat pump, an E5 error could indicate a problem with the system’s voltage. A repair technician from Air Concepts of Middle Georgia may refer to it as overcurrent protection. Both excessively high or low voltage can produce this error code.
For mini-split air conditioners, this code could also indicate voltage issues. In other cases, it’s pointing 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 a problem 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 culprit is excessively high temperatures. A high temperature at the discharge line may also result in 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 damaged, a P6 error code is common.
When temperatures exceed 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 may appear. You may also find the P6 code if the compressor is experiencing 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 have a guide for these error codes and what they can mean. But because many of these codes refer to electrical problems, professional experience is typically needed.
Call Air Concepts of Middle Georgia for Mini-Split Repair
Air Concepts of Middle Georgia 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 diagnose your unique problem.
For some problems, repairs may 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 Milledgeville and Middle Georgia, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 478-200-5689 today.