Midea air conditioner Troubleshooting

The Midea company is one of the largest producers and exporters of air conditioners in the world. The range of Midea includes household systems of types Split and Multi Split, commercial and industrial air conditioners, central conditioning systems. They all possess Midea air conditioner troubleshooting system.

Indoor unit error code explanation:

Glory series

NO. MALFUNCTION DEFTIMERAUTORUN
1Indoor EEPROM malfunction oooo
2Indoor / outdoor units communication error ****
3Zero-crossing signal erroroo**
4Indoor fan speed has been out of control oo**
5Open circuit or short circuit of outdoor temperature sensor xox*
6Open circuit or short circuit of T1 or T2 temperature sensor ooo*
8IPM module protection or IGBT over-strong current protection xxo*
9Over voltage or too low voltage protectionxoo*
10Temperature protection of compressor top oxx*
11Inverter compressor drive protection ox**
12Mode conflict xo**

*Flash (at 0.5Hz, Mode conflict at 0.25Hz)  O light  X(off)

9V series+VERTU series+9A series+Corona series+ R series+Y series+ X series

DisplayLED STATUS
E0 Indoor EEPROM malfunction
E1 Indoor/ outdoor units communication error
E2 Zero-crossing signal error
E3Indoor fan speed has been out of control
E5Open circuit or short circuit of outdoor temperature sensor
E6 Open circuit or short circuit of T1 or T2 temperature sensor
P0IPM module protection or IGBT over-strong current protection
P1Over voltage or too low voltage protection
P2Temperature protection of compressor top
P4Inverter compressor drive protection
P5Mode conflict

NEOLA series +PREMIER series +OASIS series

Display Operation lamp flash times Timer lampFailure
E01xIndoor EEPROM malfunction
E12xIndoor / outdoor units communication error
E23xZero-crossing signal error
E34xIndoor fan speed has been out of control
E45xOpen or short circuit of T1 temperature sensor
E56xOpen or short circuit of T2 temperature sensor
F1 2oOpen or short circuit of T4 temperature sensor
F23oOpen or short circuit of T3 temperature sensor
F3 4oOpen or short circuit of T5 temperature sensor
F45oOutdoor EEPROM malfunction
F67oOpen or short circuit of T2B temperature sensor
P01*IPM module protection or IGBT over-strong current
protection
P12*Over voltage or too low voltage protection
P23*Temperature protection of compressor top
P45*Inverter compressor drive protection
P56*Mode conflict

o  (light)   X   (off)  * (flash)

Cassette series

Operation TimerDe-frostAlarm LED STATUS
*xxxOpen or short circuit of T1 temperature sensor
xx*xOpen or short circuit of T2 temperature sensor
x*xxIndoor / outdoor units communication error
xxx*Full-water malfunction
**xxIndoor EEPROM malfunction
*xxoIPM module protection
*oxxOpen or short circuit of T3 or T4 temperature sensor
*oxoOutdoor voltage protection
****Temperature protection of compressor top
*xooMode conflict
*ooxInverter compressor drive protection

*  flash, o light, X extinguished

Ceiling &Floor series

Operation TimerDe-frostAlarm LED STATUS
*xxxOpen or short circuit of T1 temperature sensor
xx*xOpen or short circuit of T2 temperature sensor
x*xxIndoor / outdoor units communication error
xxx*Full-water malfunction
**xxIndoor EEPROM malfunction
*xxoIPM module protection
*oxxOpen or short circuit of T3 or T4 temperature sensor
*oxoOutdoor voltage protection
*xoxTemperature protection of compressor top
*xooMode conflict

*  flash, o light, X extinguished

A5 Duct series

Operation TimerDe-frost Alarm LED STATUS DISPLAY DIGITAL TUBE
*xxxOpen or short circuit of T1 temperature sensor E0
xx*xOpen or short circuit of T2 temperature sensor E1
x*xxIndoor / outdoor units communication error E2
xxx*Full-water malfunction E3
**xxIndoor EEPROM malfunction E4
*xxoIPM module protection E5
*oxxOpen or short circuit of T3 or T4 temperature
sensor
E6
*oxoOutdoor voltage protectionP0
****Temperature protection of compressor top P3
*()xxInverter compressor drive protection P4
*xoxMode conflict P5

*  flash at 5Hz, o light, X extinguished () flash at 0.5Hz

Console series

OperationTimer De-frost LED STATUS
*xxOpen or short circuit of T1 temperature sensor
xx*Open or short circuit of T2 temperature sensor
x*xIndoor / outdoor units communication error
**xIndoor EEPROM malfunction
*x*IPM module protection
***Open or short circuit of T3 or T4 temperature sensor
*oxTop temperature protection of compressor
*()xInverter compressor drive protection
*xoMode conflict
*o*Indoor fan speed has been out of control

*  flash at 5Hz, o light, X extinguished

Outdoor unit error code explanation:

For units(except M5OA-36HRDN1-Q model)

Display LED STATUS
E0Outdoor EEPROM malfunction
E1No A Indoor unit coil outlet temp. sensor or connector of sensor is defective
E2No 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
E6No D Indoor unit coil outlet temp. sensor or connector of sensor is defective
E4Open or short circuit of outdoor unit temperature sensor
E5Compressor voltage protection
E7Communication malfunction between IPM board and outdoor main board
P0Temperature protection of compressor discharge or compressor top.
For M4OC-27HRDN1, M4OC1-27HRDN1-Q,M4OC-36HRDN1-Q,it only means Temperature protection of compressor discharge
P1High pressure protection(only for M4OC1-27HRDN1-Q, M4OC-27HRDN1-Q,M4OC-36HRDN1-Q)
P2Low pressure protection(only for M4OC1-27HRDN1-Q, M4OC-27HRDN1-Q,M4OC-36HRDN1-Q)
P3Current protection of compressor
P4IPM module protection
P6High temperature protection of condenser
P7Inverter compressor drive protection

For M5OA-36HRDN1-Q model

Display LED STATUS
E0Outdoor EEPROM malfunction
E2Indoor / outdoor units communication error
E3Communication malfunction between IPM board and outdoor main board
E4Open or short circuit of outdoor unit temperature sensor
E5 Compressor voltage protection
E6PFC module protection
P0Temperature protection of compressor discharge or compressor top.
For M4OC-27HRDN1, M4OC1-27HRDN1-Q,M4OC-36HRDN1-Q,it only means Temperature protection of compressor discharge
P1High pressure protection
P2Low pressure protection
P3Current protection of compressor
P4Temperature protection of compressor discharge
P5High temperature protection of condenser
P6IPM module protection
F1No 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
F5No E Indoor unit coil outlet temp. sensor or connector of sensor is defective