See also: Midea Air Conditioners Service Manuals
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 |
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|
|
|
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 |
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Indoor unit |
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|
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 |
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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 |
|
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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) |
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Are displayed |
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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! |
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** - only three-phase models |
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*** - mcc |
Self-diagnosis |
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|
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 |
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Are displayed |
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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 |
Alan Raymond Baird (Monday, 17 October 2022 01:22)
Have a MFAB35NB
MFAB35WB
with an fault code 52
can you tell me what this is,