Lennox mini-split systems are an excellent way to provide compact, yet effective 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 went wrong, you should locate where the mini-split error codes are displayed. Recognizing what these codes refer to can help ensure fast mini-split repair, especially if professional help is required.
What the error code means will ultimately depend on the specific model of your mini-split system. You can check your manual to find a guide for what each code means. You can also contact the HVAC pros at AW Heating & Air Conditioning. Our technicians are trained to recognize these codes in order to provide prompt mini-split repair in Lincoln. Give us a call at 402-438-7992 to request an appointment.
Common Error Codes for Lennox Mini Splits
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, consider the following:
Is your model 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 hampered. It may be facing intermittent connection issues or have failed entirely. When the indoor and outdoor units can’t communicate with one another, it will be unable to properly 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 AW Heating & Air Conditioning may refer to it as overcurrent protection. Both unusually high or low voltage can result in this error code.
For mini-split air conditioners, this code may also stand for 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, like an E1 code. It might also be an issue with one of the temperature sensors.
P4 – Compressor Drive Error / High Temperature
A P4 error code will most times be related to your mini-splits compressor system, located within the outdoor unit. When the compressor drive is faulty, 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 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 rise above 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 can appear. You may also find the P6 code if the compressor is experiencing high or low pressure concerns.
Check the Service Manual for Your Specific Model
Don’t forget 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 as many of these codes start with electrical problems, professional experience is usually necessary.
Trust AW Heating & Air Conditioning for Mini-Split Repair
AW Heating & Air Conditioning 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 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 Lincoln, bringing your new system online with little to no comfort disruption.
To schedule an appointment, give us a call at 402-438-7992 today.