Lennox mini split systems are a solid 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 home comfort system is flawless. There’s always a chance your mini split will malfunction. To find out what is malfunctioning, you’ll want to locate where the mini split error codes are displayed. Knowing what these codes mean can help you kickstart mini split repair, especially if professional help is necessary.
What the error 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 AC Sales. Our technicians are trained to recognize these codes in order to provide prompt mini split repair in Lafayette. Give us a call at (337) 234-2345 to schedule 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 see. To learn what your error code could mean, ask yourself the following:
- Is your system a mini split air conditioner or a mini split heat pump?
- Are there additional signs of what malfunctioned? A strange 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 signifies that communication between the mini split system’s indoor and outdoor units has been hampered. It might be facing 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 refer to a problem with the system’s voltage. A repair technician from AC Sales may refer to it as overcurrent protection. Both excessively high or low voltage can result in this error code.
For mini split air conditioners, this code could also represent 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 usually be related to your mini splits compressor system, located 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 may also result in 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 damaged, a P6 error code is common.
When temperatures rise above safe levels, a safety switch will protect the electrical components of your mini split system, including any components that control 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
Don’t forget that in general, error codes are specific to each model of a Lennox mini split system. Your manual will offer a guide for these error codes and what they should mean. But since many of these codes start with electrical problems, professional experience is often needed.
Call AC Sales for Mini Split Repair
AC Sales 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 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 Lafayette, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at (337) 234-2345 today.