Lennox mini-split systems are an excellent way to provide compact, yet powerful 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 chance your mini-split could malfunction. To find out what is malfunctioning, you should locate where the mini-split error codes are displayed. Understanding what these codes refer to can help ensure fast mini-split repair, especially if professional help is necessary.
What any code means will ultimately depend 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 Stephen Hurst Pack Heating and Cooling. Our technicians are trained to learn these codes in order to provide prompt mini-split repair in Circleville. Give us a call at 740-474-5940 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 come across. To learn what your error code can mean, ask yourself 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 strange noise coming from a specific 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 problems 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 may indicate a problem with the system’s voltage. A repair technician from Stephen Hurst Pack Heating and Cooling may refer to it as overcurrent protection. Both unusually 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 could also be an issue with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will most times be connected to your mini-splits compressor system, housed within the outdoor unit. When the compressor drive is faulty, 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 ensure the indoor and outdoor units can communicate with one another. If the drive board is malfunctioning, 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 could appear. You may also find the P6 code if the compressor is facing high or low pressure concerns.
Review 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 since many of these codes refer to electrical problems, professional experience is typically needed.
Call Stephen Hurst Pack Heating and Cooling for Mini-Split Repair
Stephen Hurst Pack Heating and Cooling 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 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 Circleville, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 740-474-5940 today.