Midea air conditioner error codes
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 nd it below.
FAULT CODE INDICATING MEANING
First power on, if no address The timing and operating lamps will be ashed or display FE at the
same time
M_Home not matching fault 4 Lamps will be ashed or display HO at the same time
Mode con ict fault The defrosting lamp will be ashed or display EO
Indoor and outdoor units communication The timing lamp will be ashed or display E1
fault
Indoor unit temperature sensor (T1) fault The operating lamp will be ashed or display E2
Swinging motor fault Display E8
Temperature sensor (T2) fault The operating lamp will be ashed or display E3
Temperature sensor (T2B) fault The operating lamp will be ashed or display E4
EEPROM fault The defrosting lamp will be ashed slowly or display E7
Outdoor unit fault The alarm lamp will be ashed slowly or display Ed
Water level alarm fault The alarm lamp will be ashed or display EE
Midea air conditioner error code R series
DISPLAY MALFUNCTION
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Midea air conditioner error codes
DISPLAY MALFUNCTION
E0 EEPROM parameter error
E1 Indoor / outdoor units communication protection
E2 Zero-crossing signal error
E3 Fan 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
DISPLAY
NO. MALFUNCTION DEF TIMER AUTO RUN
DIGITAL TUBE
1 EEPROM error o o o o E0
2 Indoor / outdoor units communication protection * * * * E1
3 Zero-crossing signal error o o * * E2
4 Indoor fan speed out of control o o * * E3
5 Outdoor unit temp. sensor or connector of temp. sensor is x o x * E5
defective
6 Open or short circuit of room or evaporator temperature o o o * E6
7 Outdoor fan speed out of control o o * * E7
8 IBM malfunction or IGBT over-strong current protection x x o * P0
9 Over voltage or too under voltage protection x o o * P1
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Midea air conditioner error codes
DISPLAY
NO. MALFUNCTION DEF TIMER AUTO RUN
DIGITAL TUBE
10 Temperature protection of compressor top. o x x * P2
11 Compressor position protection o x * * P4
12 Inverter module protection x o * * P5
* Flash (at 0.5Hz, P5 at 0.25Hz) o light x （o ）
Midea air conditioner error code 9A series
DISPLAY
NO. MALFUNCTION DEF TIMER AUTO RUN
DIGITAL TUBE
1 EEPROM error o o o o E0
2 Indoor / outdoor units communication protection * * * * E1
3 Zero-crossing signal error o o * * E2
4 Indoor fan speed out of control o o * * E3
5 Outdoor unit temp. sensor or connector of temp. sensor is x o x * E5
defective
6 Open or short circuit of room or evaporator temperature o o o * E6
7 Outdoor fan speed out of control * o * * E7
8 IBM malfunction or IGBT over-strong current protection x x o * P0
9 Over voltage or too under voltage protection x o o * P1
10 Temperature protection of compressor top. o x x * P2
11 Compressor position protection o x * * P4
12 Inverter module protection x o * * P5
* Flash (at 0.5Hz, P5 at 0.25Hz) o light x （o ）
Midea air conditioner error code Cassette/Ceiling&Floor series:
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Midea air conditioner error codes
OPERATION TIMER DE-FROST ALARM LED STATUS
* x x x Indoor room temp. sensor open or short-circuit
x x * x Indoor pipe temp. sensor open or short-circuit
x * x x Indoor and outdoor communication error
x x x * Water level alarm
* * x x EEPROM error
* x x o Inverter module protection
* o x x Outdoor sensor open or short circuit
* o x o Outdoor voltage protection
* x o x Compressor top temp. protection
* x o o Mode con ict
* x * * Outdoor current protection
* ash, o light, x extinguished
Midea AC Outdoor Units error code (except M5OA-36HRDN1-Q model)
DISPLAY LED STATUS
E0 EEPROM error
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
E3 No 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
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Midea air conditioner error codes
DISPLAY LED STATUS
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 No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
E2 Communication malfunction between outdoor unit and indoor units
E3 Communication malfunction between outdoor main chip and compressor control chip
E4 Outdoor unit temp. sensor or connector of temp. sensor is defective
E5 Compressor voltage protection
E6 PFC 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
P6 Inverter module protection
F1 No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
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Midea air conditioner error codes
DISPLAY LED STATUS
F2 No B Indoor unit coil outlet temp. sensor or connector of sensor is defective
F3 No C Indoor unit coil outlet temp. sensor or connector of sensor is defective
F4 No 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
OPERATION TIMER DEFROSTING AUTO
FAILURE PHENOMENON
LAMP LAMP LAMP LAMP
Over current protection of the compressor occurs 4 times ☆ ☆ ☆ ☆
Indoor room temp, sensor is open circuit or short circuit X ☆ X X
Temp, sensor on indoor evaporator is open circuit or short circuit ☆ X X X
Temp, sensor on outdoor condenser is open circuit or short circuit X X ☆ X
(without cooling only models)
Outdoor unit protects(outdoor compressor current, phase order X X ☆ ☆
etc)
EEROM error X ☆ X ☆
Indoor unit communication error X X X ☆
Midea MSC-09HRDN1-QD0(E) air conditioner error code
LED6 LED5 INDOOR
MALFUNCTION
(GREEN) (RED) DISPLAY
Over voltage or too low voltage protection 0 0 P1
Normal standby 0 X
MCE malfunction 0 ☆ P1
Normal operation 0 0
MCE start malfunction X ☆ P4
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Midea air conditioner error codes
LED6 LED5 INDOOR
MALFUNCTION
(GREEN) (RED) DISPLAY
MCE phase lack protection, MCE zero speed protection, PWM in-phase ☆ 0 P4
malfunction
IGBT over-strong current ☆ X PO
Communication malfunction ☆ ☆ P4
0-Bright
×-Extinguished
☆-Blink
Midea M2OC-18HRDN1-M air conditioner error code
DISPLAY LED STATUS
EO EEPROM parameter error
E1 No 1 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E2 No 2 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E3 No 3 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E6 No 4 Indoor units pipe temp, sensor or connector of pipe temp, sensor is defective
E4 Open or short circuit of outdoor temperature sensor
E5 Compressor volt protection
E7 Communication error between outdoor IC and DSP
PO Temperature protection of compressor top.
P1 High pressure protection (just for 36K 1x4 units.)
P2 Low pressure protection (just for 36K 1x4 units.)
P3 Compressor current protection
P4 Inverter module protection
P5 Outdoor temp, too low protection
P6 Condenser high-temperature protection
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Midea air conditioner error codes
DISPLAY LED STATUS
P7 Compressor driving protection
PF PFC protection (just for 36K 1x4 units.)
Midea MSX-07HRN1-QC2 air conditioner error code
LED FAILURE
E1 EEPROM error
E2 Zero crossing detection error
E3 Indoor fan speed has been out of control
E4 Over current protection occurs 4 times.
E5 The T1 sensor is open circuit or short circuit
E6 The T2 sensor is open circuit or short circuit
E7 The T3 sensor is open circuit or short circuit
E9 Indoor / outdoor units communication error
Midea MSMBB-12CRDN1-MP0W air conditioner error code
TIMER
OPERATION LAMP DISPLAY LED STATUS
LAMP
☆ 1 time X EO Indoor unit EEPROM parameter error
☆ 2 times X E1 Indoor / outdoor units communication error
☆ 3 times X E2 Zero-crossing signal detection error
☆ 4 times X E3 Indoor fan speed has been out of control
☆ 5 times X E4 Indoor room temperature sensor T1 open circuit or short circuit
☆ 6 times X E5 Evaporator coil temperature sensor T2 open circuit or short circuit
☆ 7 times X EC Refrigerant leakage detection
☆ 1 times 0 FO Overload current protection
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Midea air conditioner error codes
TIMER
OPERATION LAMP DISPLAY LED STATUS
LAMP
☆ 2 times 0 F1 Outdoor ambient temperature sensor T4 open circuit or short
circuit
☆ 3 times 0 F2 Condenser coil temperature sensor T3 open circuit or short circuit
☆ 4 times 0 F3 Compressor discharge temperature sensor T5 open circuit or short
circuit
☆ 5 times 0 F4 Outdoor unit EEPROM parameter error
☆ 6 times 0 F5 Outdoor fan speed has been out of control
☆ 1 times ☆ PO IPM malfunction or IGBT over-strong current protection
☆ 2 times ☆ P1 Over voltage or over low voltage protection
☆ 3 times ☆ P2 High temperature protection of compressor top diagnosis and
solution
☆ 5 times ☆ P4 Inverter compressor drive error
O-(light) X-(o ) ☆-
( ash)
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