Lennox mini split systems are a great way to provide compact, yet powerful 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 chance your mini split could malfunction. To determine what happened, you should locate where the mini split error codes are displayed. Understanding what these codes mean can help ensure fast mini split repair, especially if professional help is required.
What each code means will ultimately depend on the specific model of your mini split system. You can consult your manual to find a guide for what each code means. You can also trust the HVAC pros at Franklin's Heating & Air Conditioning, Inc. Our technicians are trained to learn these codes in order to ensure prompt mini split repair in Oxford. Give us a call at 662-281-1231 to schedule an appointment.
Common Lennox Mini Split Error Codes
While error codes may differ from model to model, there are some codes you’ll be more likely to come across. To determine 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 other signs of what is happening? A loud noise coming from a key component, for example.
Here are a few 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 disrupted. It may 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 properly 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 Franklin's Heating & Air Conditioning, Inc 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 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 might also be a problem with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will usually be related to your mini splits compressor system, housed within the outdoor unit. When the compressor drive is not working, the most likely reason is excessively high temperatures. A high temperature at the discharge line can 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 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 may appear. You may also find the P6 code if the compressor is facing high or low pressure issues.
Review the Manual for Your Specific Model
Don’t forget 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 should mean. But since many of these codes refer to electrical problems, professional experience is often needed.
Call Franklin's Heating & Air Conditioning, Inc for Mini Split Repair
Franklin's Heating & Air Conditioning, Inc can offer 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 Oxford, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 662-281-1231 today.