In case of error, the display on the indoor unit shown the following error codes: IFB AC Error Codes and Troubleshooting Error Codes Description of the trouble E1 The fault of indoor temperature sensor. RUN lamp: flashes once. E2 The fault of indoor pipe temperature sensor. RUN lamp: flashes twice. E4 Gas Leakage E6 Malfunction of indoor fan motor. RUN lamp: flashes 6 times. IFB Air Conditioner Troubleshooting Malfunction: The appliance does not operate Possible Causes: Power failure/plug pulled out Damaged indoor/outdoor unit fan motor Faulty compressor thermomagnetic circuit breaker Faulty protective device or fuses. Loose connections or plug pulled out It sometimes stops operating to protect the appliance. Voltage higher or lower than the voltage range Active TIMER-ON function Damaged electronic control board Malfunction: Strange odour Possible Causes: Dirty air filter Malfunction: Noise of running water Possible Causes: Back flow of liquid in the r...