Error codes of Mitsubishi Electric air conditioners

The first split system appeared in the 80s of the last century, and since then it has been significantly improved. There are new features, and the design has also changed. However, along with this, air conditioners became more complex than their predecessors. To some extent, the reliability of modern devices has decreased compared to the old models, since new air conditioners consist of many components. At the same time, the stable operation of each part is important.

It is not surprising that in such conditions, sooner or later one or even several components may fail. So that the masters could better navigate the breakdowns, the manufacturers came up with a system of codes. Each code contains an encrypted error that occurs when the device breaks down. The code is displayed on the display of the air conditioner. Knowing what this or that code means, you can quickly understand what exactly went wrong in the split system.

In this article, we will list the main error codes of an air conditioner from the Mitsubishi brand. Errors of Mitsubishi Electric air conditioners (Mitsubishi Electric) even an inexperienced user will be able to decipher it, but only an experienced master from the service center can fix breakdowns. Do not try to perform repairs yourself, entrust this task to a professional.

We will tell you only about the main errors that occur most often. The list and description may differ depending on the model of the air conditioner and the date of manufacture. Therefore, this list cannot be called universal.

List of major errors

General Climate air conditioner

If one of the following codes is displayed on the Mitsubishi air conditioner, call the service center and report the breakdown.

P1

The sensor at the input is faulty.

P2

The sensor on the heat exchanger is faulty.

P4

The drainage pan is overflowing, or the sensor responsible for monitoring the condensate level is faulty.

P5

Malfunction in the operation of the drainage pump.

P6

There was overheating or, conversely, freezing.

P8

The temperature sensor is faulty.

P9

The thermal sensor on the heat exchanger is faulty.

PA

The compressor is stopped because the drainage system is overflowing. Drainage cleaning is required.

E0

There is no connection between the air conditioner and the remote control.

E1

Malfunction of the remote control connection.

E2

The control panel is out of order.

E3

Malfunction of the signal line.

E5

There was a malfunction in the control panel.

E6

The thermal sensor of the heat exchanger of the indoor unit has failed.

E7

The temperature sensor that monitors the indicators in the room has failed.

E8

The overload protection in the «HEAT»mode has worked.

E9

There is no connection between the indoor and outdoor units, the failure occurred in the outdoor unit.

E10

More than 15 indoor units are controlled by a single remote control.

E11

Incorrect addressing between the main and auxiliary blocks.

E12

Manual and automatic addressing are mixed in one network.

E14

The connection between the main and auxiliary blocks is lost.

E16

The fan motor in the indoor unit has failed.

E18

Incorrect addressing between the main and auxiliary blocks.

E19

Pump malfunction.

E20

The fan in the indoor unit operates at an increased speed.

E21

The filter panel in the indoor unit is not locked.

E22

Incorrect connection to the outdoor unit.

E28

The temperature sensor in the control panel is faulty.

E30

There is no connection between the internal and external unit.

E31

The outdoor unit has a double address.

E32

The L3 phase is open on the primary side.

E36

An excessive temperature is recorded at the discharge pipe.

E37

The heat sensor of the heat exchanger in the outdoor unit has failed.

E38

The temperature sensor for measuring air readings on the street has failed.

E39

The thermal sensor of the discharge pipe went out of operation.

E40

High-pressure malfunction.

E41

The power transistor overheated.

E42

Current cut-off.

E43

The excess total power of the connected units.

E44

Wet running.

E45

There is no inverter connection.

E46

Manual and automatic addressing are mixed in one network.

E47

The inverter is over-current.

E48

The fan motor of the outdoor unit has failed.

E49

Low pressure, or the low pressure sensor has failed.

E51

The power transistor overheated within 15 minutes.

E53

The thermal sensor of the suction pipe has failed.

E54

The high or low pressure sensor has failed.

E55

The compressor’s thermal sensor has failed.

E56

The power inverter module overheated.

E58

The current supply has been stopped.

E59

The compressor did not start.

E60

Desynchronization of the compressor rotor.

E61

There is no connection between the main and auxiliary outdoor units.

E63

Emergency shutdown of the system.

E75

There is no connection to the central remote control.

E82

The thermal sensor at the heat exchanger of the indoor unit has failed.

E84

High humidity.

E85

The frost protection has worked.

E86

Excessive pressure is detected in the «HEAT» mode.

EE

There is no connection between the indoor and outdoor units.

U1/UD

The overheating protection has been activated, or an overpressure has been detected.

U2

There is too little freon in the system, or the discharge pressure is insufficient.

U3/U4

The thermal sensor of the outdoor unit is broken.

U5

The temperature of the condenser is too high or, conversely, too low.

U6

The compressor stopped due to a current overload.

U7

There is too little freon in the system, or the discharge pressure is insufficient.

U8

The fan motor located in the outdoor unit has stopped. This error is also classified as Protect stop.

U9/UH

The current sensor is faulty, or the voltage is insufficient/excessive.

UF

The compressor is jammed, its operation is stopped.

UP

The compressor is overloaded, its operation is stopped.

Fb

There was a malfunction in the control board at the wall unit. Probably a breakdown in volatile memory.

Mode Invalid

The control module has failed. Diagnostics is necessary.

Results

The split system is technically complex, since it consists of many components connected to each other. This causes a lot of difficulties when performing repairs, since it is necessary to perform long-term diagnostics. But manufacturers have simplified this process by inventing a system of codes.

The main malfunctions are encrypted in them. In case of a breakdown, one of the codes is displayed on the Mitsubishi air conditioner, which is very convenient. The wizard can decipher the code and understand what exactly is broken and in which block. This saves a lot of time and effort for the specialist, as well as the client’s money.

As you can see, the Mitsubishi air conditioner (Mitsubishi) can have a variety of errors, and this is normal. Of course, it is important to carry out regular maintenance of the air conditioner. But you should be prepared for the fact that sooner or later one of the components may fail and you will find out about it by seeing the corresponding code on the display of the air conditioner. Professional masters will be able to quickly decipher them, but beginners can use our cheat sheet article.

In the comments below, you can share your experience of repairing air conditioners and deciphering codes. Give some useful recommendations for users and wizards. Also check out other articles on our website. We wish you good luck!

Добавить комментарий

Ваш адрес email не будет опубликован. Обязательные поля помечены *