The error code 'F4' is indicating either a fault with the indoor fan motor or indoor PCB.
To check which one just follow the instructions below:
- isolate the unit from the power, then 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.
note: the indoor fan motor is connected to the PCB with 2 connections, 1 is the power supply and the other is the communication line.
If you would like to purchase a new PCB or fan motor - or for any further questions - contact us via email at info@airconditioningcentre.com or call us at 0370 3344 556.