Trane Mini Split Error Codes

What is the Trane Mini Split

The Trane Mini Split is a ductless system that ensures flexibility. The single-zone (also known as a mini-split) ductless system lets you adjust the temperature of a room the way you need. The system includes one outdoor unit and one indoor unit, both connected. However, you don’t need any ductwork for this sort of system.

The outdoor mini-split unit is installed outside your house and connects to the indoor mini-split unit. The connection is made with small cables and a refrigerant line through a hole in the wall.

Trane mini-split e1 error code

If you have a Trane Mini-split system that displays the E1 error code, there are several things you can verify before you reach an HVAC servicing company. Several issues can generate an E1 error code, so you try various steps to solve the problem.

The most popular solution is to turn the unit off at the breaker for 5 minutes. You also need to reset both the outdoor and the indoor condensers.

The errors can vary between manufacturers and models, so you still need to check out the error code with your unit’s manual.

What steps to take to fix the E1 error code

Begin with turning off the power to the unit. Turn the power off at the breaker for 5 minutes and reset the unit. After 5minutes, turn the power back on and see if the error code still shows.

Many times, this effortless step solves the problem. However, if the error code still shows, you need to check out the following aspects.

Possible causes and fixes

Several things can make the Mini-Split faulty and show the E1 error code.

Dirty air filter

More often than not, some Mini-Split units will show an E1 code to signal that you need to clean the filter. You will find the filter inside the unit, under the door, or on its top. You can remove and clean the filter with some water.

Once the filter is clean, please put it back inside the unit and reset the unit. If the error code is gone, you’re good to go.

Loose Wiring Connections

If a wire gets loose, the signal will become faulty and you need to check it out with the power off. Examining indoor and outdoor unit plugs can be verified to discover if any wires are loose.

A loose connection isn’t always easy to spot, so you have to push every plug on to verify.

Communication issues between indoor and outdoor units

The inside and outside units present a wired communication line (4-8 wires) that travels between the two units. You should examine the communication line and voltage lines and see if the connection is good or not.

Remember to turn the power off before you open the panels.

PCB Board Error

The E1 error code can also appear on the cause of the PCB board. Unfortunately, if this is the cause of your E1 error code, you will need to contact an HVAC technician to check it out.

The PCB boards can also cause an E1 error.

Trane mini-split E3 error code

The E3 error code happens when the Trane mini Split fan span has been low for a specific amount of time. A faulty fan assembly, a wiring mistake, a faulty control board, or a defective fan motor can be the causes of the E3 error code.

Don’t touch or try to fix anything until you turn off the power from the separate box for the outdoor unit or the indoor unit’s breaker box.

Begin with checking out the wiring of the fan motor; you need to see that everything is connected correctly and not lost. Sometimes, you will have to replace the control board or the fan motor to address the issues.

Should you have an E3 error code, the best thing to do is to call the HVAC technician to discover the cause of the issue.

Trane mini-split e6 error code

More often than not, a mini-split with an E6 error code informs you of a communication error. We recommend you start with checking out the manual for your specific model; call the professionals if you’re not sure.

Should you decide to go ahead and troubleshoot the E6 error code, we remind you that you need to know to use a multimeter—checking the voltages and continuity will be necessary.

What is the E6 error code on a Trane mini-split?

The E6 error code informs of a communication error; typically, the inside unit can no longer communicate with the unit outside the house. A problem with low and high voltage lines might be the cause.

What leads to an E6 Code on a Mini-Split?

Several things could cause your mini-split system not to properly function and display an E6 error code:

Wiring
Faulty control board
Defective high voltage wiring
Open or poor communication wires

Bad communication wires between the inside and outside can cause the E6 error code. The wiring refers to both the voltage at the outside unit and the voltage that goes inside the unit. Many mini-split units feature high voltage that goes to the external unit, which sends a low voltage to the unit inside the house.

Between the two units, there’s also a 4-8 wire communication line and you have to check out each wire; please see if there’s a bad connection or an opening in a wire.

If wiring and voltages are OK, the unit’s (indoor or outdoor) control board could be the problem.

What steps to take to troubleshoot and fix the E6 error code?

Voltages can vary between mini-split units, so you have to check the inside door of the units (indoor and outdoor) for details.

Start with examining the voltage on the inside unit. You also have to verify the communication signal wires between the two units. Is there a bad connection? Do you see an open-wire?

Here’s how you can check the wires for an open:

Turn off the power to the system
Cross two wires
Use a meter to check them on the other side for continuity

When the communication line is in order and the voltages are adequate, a faulty control board on either of the two units is most likely the problem. A trane mini-split system will show an E6 error code if the primary PCB board experiences a communication issue. Communication lines or the voltage could be the reason for the communication problem.

We want to highlight that bad wiring will damage the control board and you will most likely have to replace them. If voltages and communication test fine, a bad control board is probably why. If so, the best thing to do is contact a professional HVAC technician to fix the unit.

Is it possible to reset an E6 code on a mini-split?

You can reset the E6 Code, but you have to start by turning off the power to the system at the breaker. Once the power at the breaker is off, wait for 5 minutes and turn the power back on afterward. If the error code still shows, you will have to continue with the troubleshooting until you find its cause.

Trane mini-split E7 error code

Several things can cause the E7 error code on your mini-split system and start with checking out the manual for your unit. Some variations may exist.

What is an E7 error Code on a Mini-Split?

The E7 error code appears when the indoor unit isn’t in the same mode as the outdoor unit. For instance, the outdoor unit could be in the heat mode, whereas the indoor unit could be in the cooling mode. This typically happens if the outdoor unit can’t detect that the indoor unit went into the cooling mode.

Luckily, the easiest fix is to turn off the power to the system for a couple of minutes. Reset the unit afterward. If the error code still shows, you will need to continue troubleshooting.

What Causes an E7 Code on a Mini-Split?

Several problems can lead to an E7 error code:

Faulty control board
Faulty wiring (ground wire, for instance)
Poor communication wires

Troubleshooting the E7 error code

Here are what steps to take to troubleshoot an E7 error code:

Verify communication wires between the indoor and outdoor units
See if there are any loose wires
Take a look at the PCB boards on indoor and outdoor units

Resetting the E7 mini split error code

Begin with turning off the power to both the indoor and outdoor unit. Turn off the breaker or disconnect. Wait for 3 minutes or so and turn on the units afterward.

You will reset the unit when you reset the indoor and outdoor units at the breaker. If the error code shows again, you will have to continue troubleshooting until you discover the issue.

Trane mini split error code B7

If your Trane mini-split displays a b7 error code, the indoor gas valve temperature sensor is open. The error code could also signal that the gas valve temperature sensor has short-circuited.

Trane mini split error code H7

When there is a compressor desynchronizing, your Trane mini-split will display an error code h7.

Trane mini-split F0 error code

Trane mini split error codes f0 usually inform you that the system runs low on refrigerant. A leak could be the reason for it. Checking out the system will help you identify the possible leakage. Continue with emptying and then refilling the refrigerant.

Trane mini-split H3 error code

The Trane mini split error code H3 informs on compressor overheating protection. Something may have caused the compressor to overheat. For instance, dust debris has built up on or around the compressor. The condenser fan could also be faulty.

Trane mini-split H5 error code

Should there be a problem with the IPM Current Protection, your Trane Mini Split will display an H5 error code.

Trane mini-split H6 error code

Your unit has an issue with the indoor fan motor if it displays an H6 error code. The primary computer board of the indoor unit no longer receives information about the rotation speed of the indoor fan motor. Faulty computer board, power, or wiring could also display the H6 error code.

Here is how to check out your unit if it displays an H6 error code:

Start with turning off the power to the unit before you check out the fan blades
Examine the fan blade to see if something is blocking it from turning
Turn the power off to the unit and see if the fan blade rotates; it can probably be stuck.
Check out the voltage at the AC line
Verify the computer board voltages

Trane mini-split L3 error code

Your unit will display an L3 error code if there’s an issue with the outdoor fan one error protection.