Troubleshooting – 2 Green Lights on Mitsubishi Mini Split AC Units
If both lights are green, your heat pump is still heating or cooling your space even though the temperature has not yet been reached. The indoor unit sensors are simple to use and will detect temperature changes of more than 2°C from the heat pump’s programmed temperature.
Your Mitsubishi mini split air conditioner is not operating correctly, and there are two error codes on its screen: Error code P6 and the green light. Before troubleshooting your air conditioner, check the voltage and indoor thermistor, and refrigerant levels. The next time you notice two green lights, it is time to visit your Mitsubishi dealer. If the error code is still present, consult the manufacturer’s website for a comprehensive explanation.
Error code P6
A Mitsubishi mini split’s error code P6 is an indication of a problem with the evaporator coil. The P6 code can appear on both heating and cooling modes. The problem may be due to a malfunctioning thermistor. You can check for frayed wire or burned marks on the thermistor. This is the most common cause of this error code. The Mitsubishi mini split has built-in safety measures to prevent a malfunction.
To troubleshoot an error code, first isolate the cause of the problem. A Mitsubishi mini split contains a computer board that ensures that the indoor and outdoor units can communicate with each other. If your unit is experiencing this error, you should contact an HVAC professional for further troubleshooting. An open safety switch, as well as a low-pressure switch, can cause the P6 error code.
To troubleshoot the problem, check the manufacturer’s manual and the instructions that came with it. If the manufacturer did not list the problem, check the user’s manual. You may need to replace some parts of the machine. However, the Mitsubishi air conditioners have a self-diagnostics system that stops their operation when it detects a problem. In addition to the manual, they have an app that lets you diagnose the error code on a device.
A low refrigerant level may be the cause of your Mitsubishi air conditioner not cooling as expected. When the refrigerant level in the compressor is low, it cannot cool air fast enough. This can cause the coils to freeze. Furthermore, the heat will build up and affect the coils if the air conditioner runs continuously. You may also hear a rattling sound coming from the compressor.
If the P6 error code occurs on a Mitsubishi mini split, it is most likely due to the low system pressure. In most cases, the system pressure is too low for the unit to function correctly. The most effective way to check the refrigerant level is to turn the unit’s heating and cooling temperatures to the highest and wait 15 minutes. If the pipe is not hot, there is low refrigerant in the system.
Checking the voltage of your mini split unit
If you’re experiencing an error code P1 when trying to start your Mitsubishi mini split unit, you should check the voltage of your power supply. The power supply is causing this error code, and it can be tricky to determine if it’s the real issue. To check this, you can watch the video below. In the video, you’ll see how to test bipolar transistors and capacitors. The unit’s power supply voltage should be between 187 and 253 Volts AC. After you’ve done this, you should wait 5 minutes for the capacitors to discharge.
While many mini split units only require 208/230-volt power, some units can work with 115-volt service. Voltage can cause problems with mini split systems if it’s too high or too low. Check the voltage at the unit before running the system to prevent any damage to the electrical boards. If you’re unsure of the voltage, always install a surge protector.
If your Mitsubishi mini split doesn’t power up, you should check the power source to the unit. You should also make sure that your other appliances are working. This can mean a power outage or a blown a fuse. Checking the voltage of your mini split unit is vital to prevent the unit from running out of power. In addition, you should not be forced to pay a costly repair bill if the mini split can’t power up.
Using a voltage and wattage calculator is an easy way to find the voltage and amps of your Mitsubishi mini split. In addition, a simple online search will give you an idea of how much power your mini split unit requires. However, you must be aware of the dangers of using a solid core wire. In addition, it’s possible to cause more damage if you don’t correctly use your mini split.
Aside from checking the voltage of your Mitsubishi mini split unit, you should also check the type of electrical circuit it needs. Some models require a 220V plug, while others require 110V. Make sure to check the voltage for your unit before you install it. When you install the Mitsubishi mini split unit, be sure to check the voltage before you connect the power cord. If it’s the wrong voltage, you might face a fire or a circuit breaker.
Checking the indoor thermistor
If your mini split is blinking, there may be a problem with its indoor thermistor. The built-in self-diagnostic feature of Mitsubishi AC units allows you to quickly determine if there is a problem before calling a technician. If the blinking happens more than once, this could be due to a malfunction in the louver flap. To prevent this problem, fix the louver flap. If the blinking continues, it could be a malfunctioning indoor thermistor.
You may also notice that the fan on the indoor unit is not working correctly. This could be because the thermistor is defective. If the thermistor is defective, it may read lower than average temperatures. Then you should replace the indoor controller. Once you have fixed the thermistor, you should replace the remote control. However, if it still fails to read temperatures, you should try a different remote controller.
If the E6 (6840) error code appears on the screen, it is an indicator that the indoor and outdoor units are not communicating correctly. This code appears when the indoor controller board does not receive a signal for at least 3 minutes. To diagnose this error, check the indoor thermistor and ensure that the outdoor unit has a suitable thermistor. If this does not fix the problem, replace the unit.
If the thermistor on a Mitsubishi Minisplit is not functioning, it could be due to a problem with the evaporator coil. For example, if the thermistor cannot detect a change in temperature for nine minutes, the unit will shut down and display an error code of P8. In the meantime, the evaporator coils are still heating up and cooling the indoor environment.
Checking the refrigerant levels
If you suspect that the refrigerant in your Mitsubishi mini split has run low, it’s a good idea to check the refrigerant levels. If you notice strange smells or see any water dripping from the unit, it’s a good idea to have a technician check the compressor. You can also check the connection of the drain pump by using an electrical tester. If you suspect that there’s a problem with your Mitsubishi mini split, it’s advisable to get a professional HVAC technician to perform the diagnosis.
If you notice no refrigerant in your unit, there are a few things you should check. First, check the return air sensor or thermistor, which acts as the thermostat of the mini split’s head unit. If the thermistor is not working correctly, the unit will shut off and flash the P8 error code. To fix this error code, follow these steps.
The first step in checking the refrigerant charge of a Mitsubishi Mini Split is to see if the liquid refrigerant level is high enough to start the compressor. If not, add more liquid refrigerant until the gas bubbles are gone. If you see gas bubbles, the refrigerant level is low or contaminated. To avoid this, check the refrigerant charge of your Mitsubishi mini split by taking its temperature and pressure reading.
A low refrigerant level means that the unit is not cooling as efficiently. A Mitsubishi AC needs a high refrigerant level to cool air effectively, so low levels could affect the cooling process. Refrigerant levels also cause the compressor to short-cycle. If you notice any of these symptoms, it’s time to contact a professional HVAC technician. The sooner you fix the problem, the lower the costs of power.
It would help if you had an electrician or licensed professional install your Mitsubishi mini split. It’s a difficult task, and you shouldn’t attempt it yourself unless you’re knowledgeable in the specifics. The result could be a disaster. Most mini-split installers take extensive training courses to perform the job. And if you are in doubt, hire a licensed electrical subcontractor.