Error codes for Midea air conditioners

Malfunction

Operation lamp

Timer lamp

The thermal protection of the compressor and other overload protection have already worked 4 times.

Not glow

Flashing

for more than a minute the fan of the indoor unit does not work

Flashing

Not glow

The indoor or pipe thermistor of the indoor unit is not working

Flashing

Steady on

EEROM board error

Steady on

Flashing

Phase reversed and neutral

Flashing

Flashing

Description of malfunction

Operation lamp

Timer lamp

Defrosting lamp

Auto lamp

The thermal protection of the compressor and other overload protection have already worked 4 times.

Flashing

Flashing

Flashing

Flashing

Faulty indoor unit temperature sensor

Does not burn

Flashing

Not glow

Does not burn

Faulty indoor unit temperature sensor

Flashing

Does not burn

Not glow

Does not burn

The temperature probe of the outdoor unit is not working

Does not burn

Not glow

Flashing

Does not burn

The protection of the outdoor unit has worked (for 380V) or the outdoor unit thermistor is not working properly.

Does not burn

Does not burn

Flashing

Flashing

Phase reversed and neutral

Flashing

Flashing

Not glow

Does not burn

EEROM board error

Does not burn

Flashing

Not glow

Flashing

Interconnect cable break for 380V models

Does not burn

Does not burn

Not glow

Flashing

Error Code

Type of error

Descriptions

E0

Error / Failed EEPROM

replace indoor unit board

E1

Incorrect interconnect

not a guarantee , possibly elements on the boards of indoor and outdoor units are burned out

E2

Incorrect Zero Phase Connection

correctly connect zero and phase

E3

Faulty indoor fan motor

replace motor

E4

Reserve

*

E5

Faulty / open / no contact of the outdoor unit thermistor

check contacts, replace thermistor

E6

Faulty / open / no contact indoor unit thermistors

checking contacts, replacing thermistors

P0

Over current / faulty IPM

cleaning of heat exchangers, wrong amount of refrigerant in the system, module replacement, check compressor windings

Р1

Supply voltage too high or too low

no guarantee

P2

High discharge temperature

not a guarantee , pollution of heat exchangers, lack of refrigerant, air in the system

P3

Too low street temperature

not a guarantee , shutdown at -15С, inclusion at -12С

R4

Compressor malfunction

check the resistance of the compressor windings

Description of malfunction

Operation lamp

Timer lamp

Defrosting lamp

Compressor overload protection 4 times

Flashing

not glow

Flashing

For more than a minute, the indoor unit fan does not turn on.

not glow

Flashing

Flashing

No compressor starts

Flashing

Flashing

Flashing

The tube thermistor on the indoor unit is not working

not glow

not glow

Flashing

Faulty indoor thermistor on indoor unit

not glow

Flashing

not glow

Error (failure) EEROM

Steady on

Flashing

not glow

Flashing - Operation, Timer, Defrosting, Auto

4 times compressor overload protection tripped

Flashing - Timer

The indoor thermistor does not work on the indoor unit

Flashing - Operation

Pipe thermistor does not work on indoor unit

Flashing - Defrosting

The thermistor on the outdoor unit does not work

Flashing - Defrosting, Auto

The protection of the outdoor unit has worked (for 380V) or the outdoor unit thermistor does not work

Flashing - Auto,

EEROM board error

Indoor Unit Indication

LED indication

Operation, Timer, Defrosting LEDs blink

Four times in an hour, the operating current was exceeded.

Timer LED flashes

Open or short in room thermistor

Operation LED flashes

Open or short pipe thermistor

Defrosting LED flashes at 5 Hz

Open or short circuit outdoor thermistor. block

Operation, Timer,

EEPROM Error

LEDs Defrosting, AUTO,

Outdoor unit error

AUTO LED flashes

Block Error

Indication of outdoor unit

LED indication (number of flashes at 2-second intervals)

5 flashes

Block Connection Error

4 flashes

Incorrect phasing (3 phase model)

3 flashes

High pressure

2 flashes

Broken or shorted thermistor

1 flash

Indoor Unit Failure

Steady on

Normal work

Midea Error Codes MSX Series 07-18

E1

EEPROM crash

E2

Neutral punches to the ground

E3

Error controlling the speed of the electric motor int. Block (Hall sensor not interrogated)

E4

Compressor starting current exceeding at start 4 times in a row

E5

Error on indoor unit air thermistor

E6

Error on the tube temperature sensor of the indoor unit

E1

EEPROM crash

E4

Compressor current overload four times per hour.

E5

Error in temperature probe of indoor unit by air

E6

Error on the tube temperature probe of the indoor unit

E7

Error on the tube temperature probe of the outdoor unit

E8

Zero and phase mixed up

E9

Incorrect connection of indoor and outdoor unit (incorrect communication)

Self-diagnosis   

Indoor unit

No.

Type

Descriptions

Indication

Note

1

Protection

Compressor overload current tripped four times

LED blinks operation+timer+defrosting

The air conditioner does not turn on. The error is reset after a complete disconnection from the mains.

2

Protection

Outdoor unit protection

All leds blink

Automatically reset to correct the error, except for the thermistor of the tube outdoor unit

3

Error

Indoor unit thermistor

Flashing timer

4

Error

Thermistor tube indoor unit

Operation flashes

5

Error

Outdoor unit tube thermistor

Flashing defrosting

6

Error

Thermal protection

Operation + timer flashing

Outdoor unit

Three-phase models 36, 48, 60 kbtu, outdoor unit of universal type

Type

Content

LED1

LED2

LED3

OK

Job

Glows

Off

Off

Error

Incorrect phase rotation

Blinks

Off

Off

Error

No one or two phases, phase imbalance A and B

Blinks

Off

Off

Error

No phase C, imbalance in phase C

Off

Off

Off

Error

Low boiling pressure

Blinks

Blinks

Off

Error

Over current

Off

Off

Blinks

Error

Outdoor unit tube thermistor (T3)

Off

Blinks

Blinks

Error

Outdoor unit thermistor by air (T4)

Off

Blinks

Off

OK

Expectation

Blinking (slow)

Blinking (slow)

Blinking (slow)

Error code

Description

E1

Error on the phase monitor (phase reversed, the absence of one of the phases)

E2

Inter-unit interruption

E3

Contact with the T3 temperature sensor does not work

E4

Does not work contact with the T4 temperature sensor

E5

Contact with the T5 temperature sensor does not work

E6

Water level exceeded in the pan tray

E7

Contact with the T6 temperature sensor does not work

E8

Invalid outdoor unit address

Р1

High pressure protection

P2

Low pressure protection

P3

Compressor overcurrent protection

R4

High discharge temperature protection

Р5

Condensation temperature exceeded

Outdoor unit

Three-phase models 36, 48, 60 kbtu, universal outdoor unit

Type

Content

LED1

LED2

LED3

OK

Work

Glows

Off

Off

Mistake

Incorrect phase rotation

Blinks

Off

Off

Mistake

No one or two phases, phase imbalance A and B

Blinks

Off

Off

Mistake

No phase C, imbalance in phase C

Off

Off

Off

Mistake

Low pressure protection

Blinks

Blinks

Off

Mistake

Over current

Off

Off

Blinks

Mistake

Outdoor unit tube thermistor (T3)

Off

Blinks

Blinks

Mistake

Outdoor unit thermistor by air (T4)

Off

Blinks

Off

OK

Expectation

Blinking (slow)

Blinking (slow)

Blinking (slow)

Mcc series indoor error codes (muc)

Are displayed

Code

Type of error

Actions

E2

No contact / defective thermistor through air

Check contact / replace thermistor by air

E3

No contact / defective evaporator thermistor

Check contact / replace evaporator thermistor

E4 *

No contact / defective capacitor thermistor

Check contact / replace capacitor thermistor

E5 ***

No contact / defective condensate level sensor in the pan

Check contact / replace sensor

E6 **

Error / malfunction of the outdoor unit

Look for errors on the outdoor unit board

E7

Eeprom error of indoor unit

Replace / reprogram eeprom indoor unit

Е8 ***

Condensate pan overflow

Check the drainage system and pump

* - only single-phase models!

** - only three-phase models

*** - mcc

Self-diagnosis

Indoor unit

No.

A type

Content

Indication

Note

1

Protection

Current overload, 4 times in 1 hour

LED blinks operation+timer+defrosting

The air conditioner does not work, resetting the error by turning off the power

2

Protection

Outdoor unit protection

All leds blink

Automatically reset to correct the error, except for the thermistor of the tube outdoor unit

3

Error

Indoor unit thermistor

Flashing timer

4

Error

Thermistor tube indoor unit

Operation flashes

5

Error

Outdoor unit tube thermistor

Flashing defrosting

6

Error

Thermal protection

Operation + timer flashing

M-series mobile air conditioner error codes

Are displayed

Code

Type of error

Actions

Р1

Level 1 overflow (upper pan)

Drain condensate through the top plug

P2

Level 2 overflow (lower pan)

Drain condensate through the bottom plug

E1

No contact / defective thermistor t1

Check contact / replace thermistor t1

E2

No contact / defective thermistor t2

Check contact / replace t2 thermistor

E3

No contact / faulty thermistor t3

Check contact / replace t3 thermistor