Midea air conditioner error codes

The tables below contain lists of error codes for several models of the Midea air conditioners. For each error code, there is a short explanation of the type of the malfunction. There are separate tables for the following series of Midea ACs: R series, 9V, 9A, and the Cassette/Ceiling&Floor series. If you’re looking for information on AC Outdoor Units, you will also find it below.

Fault CodeIndicating Meaning
First power on, if no addressThe timing and operating lamps will be flashed or display FE at the same time
M_Home not matching fault4 Lamps will be flashed or display HO at the same time
Mode conflict faultThe defrosting lamp will be flashed or display EO
Indoor and outdoor units communication faultThe timing lamp will be flashed or display E1
Indoor unit temperature sensor (T1) faultThe operating lamp will be flashed or display E2
Swinging motor faultDisplay E8
Temperature sensor (T2) faultThe operating lamp will be flashed or display E3
Temperature sensor (T2B) faultThe operating lamp will be flashed or display E4
EEPROM faultThe defrosting lamp will be flashed slowly or display E7
Outdoor unit faultThe alarm lamp will be flashed slowly or display Ed
Water level alarm faultThe alarm lamp will be flashed or display EE

Midea air conditioner error code R series

Display MALFUNCTION
E0EEPROM parameter error
E1 (error solution E1)Indoor / outdoor units communication protection
E2Zero-crossing signal error
E3Fan speed out of control
E5 Open or short circuit of outdoor temperature sensor
E6 Open or short circuit of room or evaporator temperature sensor
P0 IGBT over-strong current protection
P1 Over voltage or too under voltage protection
P2 Temperature protection of compressor top.
P4 Inverter compressor drive error

Midea air conditioner error code 9V series

NO. MALFUNCTIONDEF TIMERAUTO RUNDISPLAY
DIGITAL TUBE
1EEPROM error ooooE0
2Indoor / outdoor units communication protection ****E1
3Zero-crossing signal error oo**E2
4Indoor fan speed out of control oo**E3
5Outdoor unit temp. sensor or connector of temp. sensor is
defective
xox*E5
6Open or short circuit of room or evaporator temperature
ooo*E6
7Outdoor fan speed out of control oo**E7
8IBM malfunction or IGBT over-strong current protection xxo*P0
9Over voltage or too under voltage protection xoo*P1
10Temperature protection of compressor top. oxx*P2
11Compressor position protection ox**P4
12Inverter module protection xo**P5

*  Flash (at 0.5Hz, P5 at 0.25Hz)   o  light     x (off)

Midea air conditioner error code 9A series

NO. MALFUNCTIONDEF TIMERAUTO RUNDISPLAY
DIGITAL TUBE
1EEPROM error ooooE0
2Indoor / outdoor units communication protection ****E1
3Zero-crossing signal error oo**E2
4Indoor fan speed out of control oo**E3
5Outdoor unit temp. sensor or connector of temp. sensor is
defective
xox*E5
6Open or short circuit of room or evaporator temperature
ooo*E6
7Outdoor fan speed out of control *o**E7
8IBM malfunction or IGBT over-strong current protection xxo*P0
9Over voltage or too under voltage protection xoo*P1
10Temperature protection of compressor top. oxx*P2
11Compressor position protection ox**P4
12Inverter module protection xo**P5

*  Flash (at 0.5Hz, P5 at 0.25Hz)   o  light     x (off)

Midea air conditioner error code Cassette/Ceiling&Floor series:

OperationTimerDe-frost AlarmLED STATUS
*xxxIndoor room temp. sensor open or short-circuit
xx*xIndoor pipe temp. sensor open or short-circuit
x*xxIndoor and outdoor communication error
xxx*Water level alarm
**xxEEPROM error
*xxoInverter module protection
*oxxOutdoor sensor open or short circuit
*oxoOutdoor voltage protection
*xoxCompressor top temp. protection
*xooMode conflict
*x**Outdoor current protection

* flash, o light, x extinguished

Midea AC Outdoor Units error code (except M5OA-36HRDN1-Q model)

Display LED STATUS
E0 EEPROM error
E1 (error solution E1)No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
E2 No B Indoor unit coil outlet temp. sensor or connector of sensor is defective
E3No C Indoor unit coil outlet temp. sensor or connector of sensor is defective
E6 No D Indoor unit coil outlet temp. sensor or connector of sensor is defective
E4 Outdoor unit temp. sensor or connector of temp. sensor is defective
E5 Compressor voltage protection
E7 Communication malfunction between outdoor main chip and compressor control chip
P0 Temperature protection of compressor discharge or compressor top.
For M4OC-36HRDN1-Q,it only means compressor discharge temp.protection.
P1 High pressure protection(only for M4OC1-27HRDN1-Q, M4OC-36HRDN1-Q)
P2 Low pressure protection(only for M4OC1-27HRDN1-Q, M4OC-36HRDN1-Q)
P3 Compressor current protection
P4 Inverter module protection
P6 Condenser high-temperature protection

Midea AC Outdoor Units error code For M5OA-36HRDN1-Q model

Display LED STATUS
E0 EEPROM error
E1 (error solution E1)No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
E2 Communication malfunction between outdoor unit and indoor units
E3Communication malfunction between outdoor main chip and compressor control chip
E4Outdoor unit temp. sensor or connector of temp. sensor is defective
E5Compressor voltage protection
E6PFC module protection
P0 Compressor top. temperature protection
P1 High pressure protection
P2 Low pressure protection
P3 Compressor current protection
P4 Compressor discharge high-temperature protection
P5 Condenser high-temperature protection
P6Inverter module protection
F1 No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
F2No B Indoor unit coil outlet temp. sensor or connector of sensor is defective
F3No C Indoor unit coil outlet temp. sensor or connector of sensor is defective
F4No D Indoor unit coil outlet temp. sensor or connector of sensor is defective
F5 No E Indoor unit coil outlet temp. sensor or connector of sensor is defective

Midea MSH-21HRN1-QB8 air conditioner error code

Failure phenomenonOperation lampTimer lampDefrosting lampAuto lamp
Over current protection of the compressor occurs 4 times
Indoor room temp, sensor is open circuit or short circuitXXX
Temp, sensor on indoor evaporator is open circuit or short circuitXXX
Temp, sensor on outdoor condenser is open circuit or short circuit (without cooling only models)XXX
Outdoor unit protects(outdoor compressor current, phase order etc)XX
EEROM errorXX
Indoor unit communication errorXXX

Midea MSC-09HRDN1-QD0(E) air conditioner error code

malfunctionLED6 (green)LED5 (red)Indoor display
Over voltage or too low voltage protection00P1
Normal standby0X
MCE malfunction0P1
Normal operation00
MCE start malfunctionXP4
MCE phase lack protection, MCE zero speed protection, PWM in-phase malfunction0P4
IGBT over-strong currentXPO
Communication malfunctionP4
0-Bright
×-Extinguished
☆-Blink

Midea M2OC-18HRDN1-M air conditioner error code

DisplayLED STATUS
EOEEPROM parameter error
E1No 1 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E2No 2 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E3No 3 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E6No 4 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E4Open or short circuit of outdoor temperature sensor
E5Compressor volt protection
E7Communication error between outdoor IC and DSP
POTemperature protection of compressor top.
P1High pressure protection (just for 36K 1x4 units.)
P2Low pressure protection (just for 36K 1x4 units.)
P3Compressor current protection
P4Inverter module protection
P5Outdoor temp, too low protection
P6Condenser high-temperature protection
P7Compressor driving protection
PFPFC protection (just for 36K 1x4 units.)

Midea MSX-07HRN1-QC2 air conditioner error code

LEDFailure
E1 (error solution E1)EEPROM error
E2Zero crossing detection error
E3Indoor fan speed has been out of control
E4Over current protection occurs 4 times.
E5The T1 sensor is open circuit or short circuit
E6The T2 sensor is open circuit or short circuit
E7The T3 sensor is open circuit or short circuit
E9Indoor / outdoor units communication error

Midea MSMBB-12CRDN1-MP0W air conditioner error code

Operation lampTimer lampDisplayLED STATUS
☆ 1 timeXEOIndoor unit EEPROM parameter error
☆ 2 timesXE1Indoor / outdoor units communication error
☆ 3 timesXE2Zero-crossing signal detection error
☆ 4 timesXE3Indoor fan speed has been out of control
☆ 5 timesXE4Indoor room temperature sensor T1 open circuit or short circuit
☆ 6 timesXE5Evaporator coil temperature sensor T2 open circuit or short circuit
☆ 7 timesXECRefrigerant leakage detection
☆ 1 times0FOOverload current protection
☆ 2 times0F1Outdoor ambient temperature sensor T4 open circuit or short circuit
☆ 3 times0F2Condenser coil temperature sensor T3 open circuit or short circuit
☆ 4 times0F3Compressor discharge temperature sensor T5 open circuit or short circuit
☆ 5 times0F4Outdoor unit EEPROM parameter error
☆ 6 times0F5Outdoor fan speed has been out of control
☆ 1 timesPOIPM malfunction or IGBT over-strong current protection
☆ 2 timesP1Over voltage or over low voltage protection
☆ 3 timesP2High temperature protection of compressor top diagnosis and solution
☆ 5 timesP4Inverter compressor drive error
O-(light) X-(off) ☆-(flash)