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 provide both heating and cooling.
But no piece of HVAC equipment is flawless. There’s always a possibility your mini split could malfunction. To determine what happened, you’ll want to 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 needed.
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 contact the HVAC pros at Tri City Fuel & Heating Co., Inc.. Our technicians are trained to learn these codes in order to provide prompt mini split repair in West Columbia. Give us a call at 803-265-4208 to book 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 see. To identify 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 clear signs of what is happening? A strange 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 means that communication between the mini split system’s indoor and outdoor units has been disrupted. It might be struggling with 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 properly balance indoor temperatures.
E5 – Voltage Protection or Temperature Sensor Error
If you own a mini split heat pump, an E5 error can indicate a problem with the system’s voltage. A repair technician from Tri City Fuel & Heating Co., Inc. 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 could 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 could also be a problem 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, 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 can also trigger 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 rise above 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 experiencing high or low pressure issues.
Consult the 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 offer a guide for these error codes and what they should mean. But as many of these codes stem from electrical problems, professional experience is usually necessary.
Call Tri City Fuel & Heating Co., Inc. for Mini Split Repair
Tri City Fuel & Heating Co., 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 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 West Columbia, bringing your new system online with minimal comfort disruption.
To schedule an appointment, give us a call at 803-265-4208 today.