1. MIDEA Error codes for split systems
KFR-23IW/X1C KFR-33IW/X1C
KFR-53IW/X1C KFR-63IW/X1C

2. E1 – Communication fault
E1 means the indoor unit PCB and outdoor you PCB cannot communicate with each other
Check all connections are clean and tight. Corrosion on connections can cause this error, use light abrasive paper to clean each one
Check the connections are connected to the correct place, wiring diagrams are printed inside the indoor unit and in the outdoor unit PCB case.
Check for any breaks in the black communication wire, if chock blocks or rotary isolators are used then check the connection are properly connected and the isolator is turned on.
If all connections are clean, tight and correct then a faulty PCB is causing the problem. Replace them both

3. E0/E2 Indoor PCB Malfunction
Isolate the unit from the power for 2 minutes and then restart
After restarting and the error code is still showing then the indoor PCB needs to be replaced.
These error codes are signifying that the memory chip on the PCB has malfunctioned and lost its memory

4. E3 – Internal fan fault
E3 is indicating either a fault with the indoor Fan motor or indoor PCB
Isolate the unit from the power. open the air vain and spin the fan blade by hand, the fan blade should spin freely with no resistance and no noise. If the fan does not spin freely or a grinding noise is heard then the fan motor needs replacing
If the fan spins freely with no noise then there is a fault with the internal PCB, the internal PCB sends voltage to the fan motor. Check the fan motor is connected firmly to the PCB. If there's no fault with the connections then the indoor PCB needs to be replaced
Notes:
The indoor Fan motor is connected to the PCB with 2 connection, 1 is the power supply and the other is the communication line

5. E4/E5 – Internal Temperature sensor fault
E4 error signifies a problem with the internal ambient air sensor
E5 error signifies a problem with the internal coil sensor
To access these sensors the internal unit front case needs to be removed
Clean both filters as weak air flow can cause an incorrect reading
Check the sensor plug if firmly connected to the indoor PCB
Check for any breaks in the sensor wire
Check the ambient air sensor has strong air flow (the sensor must be placed in front of the coils)
Check the coil sensor socket is clean. This socket is exposed to condensate water so the socket can corrode over time. Use a small abrasive brush to clean the socket
Replace both sensors

6. EC – Refrigerant leak detected
The system has detected the unit is not performing as well as it should so it has gone into a protection mode to protect the compressor from damage.
This error can be caused by dirty filters so check the filters are clean
If the filters are clean then an engineer is required to check the refrigerant levels and recharge the system.

7. P0 – IPM Module Fault (intelligent power module)
Notes:
The 9K and 12K systems don’t use a separate IPM module as its built onto the main PCB
The 18K and 24K systems use a separate IPM module which is mounted next to the main PCB.
The IPM module is the inverter module which control the speed of the compressor and the outdoor Fan, this is what makes the unit energy efficient.
Check the connections between the compressor and IPM Module are clean and tight
Check the IPM module is firmly screwed down to the PCB case
An engineer will be needed to check the refrigerant level, low gas can cause the compressor to get hot and send wrong signals back to the compressor
If the connections are clean and tight and the refrigerant is at the right level then the IPM module needs replacing.

8. F1/F2/F3 – External Temperature sensor fault
F1 means outdoor ambient air sensor fault
F2 means outdoor coil sensor fault
F3 means outdoor compressor sensor fault
Check the connection between the sensors and the PCB is firmly connected
Check the sensor sockets are clean as these are exposed to condensate water so they can corrode, use a small abrasive brush to clean the sockets
If the sensors are connected properly and the sockets are clean then the sensor set needs to be replaced.

9. F4 – Outdoor PCB fault
This error is saying the memory chip on the outside PCB has failed.
Isolate the power from the mains for 2 minutes and then restart
If the problem still exists then the outdoor main PCB needs to be replaced

10. F5 – Outdoor Fan motor fault
E3 is indicating either a fault with the outdoor Fan motor or outdoor PCB
Isolate the unit from the power. spin the external fan blade by hand, the fan blade should spin freely with no resistance and no noise. If the fan does not spin freely or a grinding noise is heard then the fan motor needs replacing
If the fan spins freely with no noise then there is a fault with the external PCB, the external PCB sends voltage to the fan motor. Check the fan motor is connected firmly to the PCB. If there's no fault with the connections then the external PCB needs to be replaced

11. P1 – Overheat/strong current protection for IPM Module
This error code is signifying a fault with the IPM module, it is either getting too hot or the power supply is too high
Check the outdoor unit is clear of any obstructions, there must be strong air flow to the back of the unit.
Check the power supply is suitable for the system.
Check the IPM Module is firmly screwed down to the PCB case
Check for damage to the IPM Module, If damaged then it needs to be replaced.
Check for damage to the compressor, an engineer will be required to check this

12. P4 – Compressor drive fault
This error is signifying a fault between the compressor and external PCB
Check the connections between the compressor and PCB and clean and tight.
Check for any damage to the PCB, burn marks will show a faulty PCB. Replace the PCB if faulty
An engineer will be required to check the refrigerant in the system is at the correct level, this error code normally appears when the system has no gas and the compressor has burnt out. A new compressor/outdoor unit is required.
Notes:
The compressor is connected to the IPM module on the 18K and 24K units. its connected to the main PCB on the 9K and 12K units.

13. Red # symbol appearing
This # symbol appears when the unit is in a pre heat cycle on start up
It can also appear at random times of the day, this is normal during the winter months as it signifying the outdoor unit is in a defrost mode. This lasts between 3-6 minutes.
If the symbol is showing for more than 10 minutes then try setting the temperature lower to ease the pressure of the outdoor unit
If the symbol continues to show then the system is low on refrigerant and needs an engineer to check for leaks and top up the gas

14. Common Faults were an error code is not displayed

15. The unit will not turn on
Notes:
The remote control may look to be working but the unit will not receive the signal if the batteries are low on charge.
Check the unit is connected to the power supply
Isolate the unit from the mains power and then turn the unit back on, the unit should beep. If the unit beeps then the unit is connected to the power, if not then the unit is not connected to the power supply or the indoor PCB is faulty.
If the unit does beep but will not turn on by the remote control then the remote control may be at fault, replace the batteries first and try again. If this fails then the remote control needs replacing.

16. Unit not cooling/heating
Check the unit is programmed to the correct setting, I.e. set to cooling when cooling is required.
Check the unit is set to the correct temperature, for example if the room is 30 degrees and the unit is set to 16 degrees in cooling then the compressor will not start to protect itself. Always set the temperature 3-5 degrees lower than the room temperature and then lower the set temperature later on.
Check if the compressor and outdoor fan is running, if they are then the refrigerant is low in the system. An engineer will be needed to check the refrigerant level.