- Error codes – κωδικοί βλαβών κλιματιστικά Midea Blanc Inverter Series (R32)
- Temperature Sensor Resistance Value Table for T1, T2, T3, T4 , TP
- How to test compressor?
- How to test indoor and outdoor fan?
Models: Indoor – MSMABU-09HRDN8-QRD0GW , MSMABU-12HRDN8-QRD0GW , MSMACU-18HRFNX-QRD0GW(GA) , MSMADU-24HRFNX-QRD0GW(GA)
Outdoor – MOAB30-09HFN8-QRD0GW , MOAB30-12HFN8-QRD0GW , MOB32-18HFN8-QRD0GW , MOCA32-24HFN8-QRD0GW
| Display | Error contents | Solution |
|---|---|---|
|
E0/EA |
Indoor unit EEPROM parameter error |
Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Faulty indoor or outdoor PCB |
|
E1 |
Indoor / outdoor units communication error |
The indoor unit has not received feedback from the outdoor unit for 110 seconds, four consecutive times. Faulty indoor or outdoor PCB or reactor |
|
E2 |
Zero-crossing signal detection error |
When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Connection mistake or PCB faulty |
|
E3 |
The indoor fan speed is operating outside of the normal range |
When the indoor fan speed registers below 200RPM or over 2100RPM for an extended period of time, the unit will stop and the LED will display the failure (E3). Wiring mistake or faulty fan assembly or faulty fan motor or faulty PCB |
|
E4 |
Indoor room temperature sensor T1 is in open circuit or has short circuited |
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Wiring mistake or faulty sensor or faulty PCB |
|
E5 |
Evaporator coil temperature sensor T2 is in open circuit or has short circuited |
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Wiring mistake or faulty sensor or faulty PCB |
|
Eb |
Communication error between the indoor PCB and display board |
Indoor PCB does not receive feedback from Display board. Wiring mistake or faulty indoor PCB or display board malfunction |
|
F0 |
Overload current protection |
An abnormal current rise is detected by checking the specified current detection circuit. Power supply problems or system blockage or faulty outdoor PCB or wiring mistake or compressor malfunction |
|
F1 |
Outdoor ambient temperature sensor T4 open circuit or short circuit |
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Wiring mistake or faulty sensor or faulty PCB |
|
F2 |
Condenser coil temperature sensor T3 is in open circuit or has short circuited |
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Wiring mistake or faulty sensor or faulty PCB |
|
F3 |
Compressor discharge temperature sensor TP open circuit or short circuit |
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Wiring mistake or faulty sensor or faulty PCB |
|
F4 |
Outdoor unit EEPROM parameter error |
Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Faulty indoor or outdoor PCB |
|
F5 |
Outdoor fan speed operating outside of the normal range |
When the outdoor fan speed registers below 200RPM or over 1500RPM for an extended period of time, the unit will stop and the LED will display the failure (F5). Wiring mistake or faulty fan assembly or faulty fan motor or faulty PCB |
|
P0 |
IPM malfunction or IGBT over-strong current protection |
When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows “P0” and the AC turn off. Wiring mistake or IPM malfunction or faulty outdoor fan assembly or compressor malfunction or faulty outdoor PCB |
|
P1 |
Over voltage or over low voltage protection |
Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Power supply issues or system leakage or blockage or faulty outdoor PCB |
|
P2 |
High temperature protection of IPM module |
If the sampling voltage is not at 5V, the LED displays this failure code. Power supply issues or system leakage or blockage or faulty outdoor PCB or connection problems |
|
P4 |
Inverter compressor drive error |
An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Wiring mistake or IPM malfunction or faulty outdoor fan assembly or compressor malfunction or faulty outdoor PCB |
How to test sensors
Temperature Sensor Resistance Value Table for T1, T2, T3, T4
Temperature Sensor Resistance Value Table for TP
How to test compressor
Measure the resistance value of each winding by using the tester.
| Compressor Model | Compressor Model | Compressor Model | |
| KSK89D53UEZ | KSM135D23UFZ | KTF235D22UMT | |
| Blue – Red | 2.35Ω (20°C) | 1.28Ω (20°C) | 0.75Ω (20°C) |
| Blue – Black | 2.35Ω (20°C) | 1.28Ω (20°C) | 0.75Ω (20°C) |
| Red – Blue | 2.35Ω (20°C) | 1.28Ω (20°C) | 0.75Ω (20°C) |
How to test indoor – outdoor fan
Indoor or Outdoor DC Fan Motor (control chip is in fan motor)
- Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must have problems and needs to be replaced.
DC motor voltage input and output (voltage: 220-240V~):
Indoor AC Fan Motor
Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V (208~240V power supply) or 50V (115V power supply), the PCB must has problems and need to be replaced.
See also: Error codes – κλιματιστικά Midea , Models: MSC – MSH – MSE – MSG
