E-21ENGLISHTroubleshootingDetection of errors If an error occurs during the operation, one or more LED flickers and the operation is stopped except the LED. If you re-operate the air conditioner, it operates normally at first, then detect an error again.LED DisplayLED Display on the receiver & display unit1. Indoor unit error(Display is unrelatedwith operation)2. Outdoor unit error(Display is unrelatedwith operation)Error of temperature sensorin the indoor unitt (Open/Short)Error of heat exchanger sensorin the indoor unitError of the outdoor temperature sensorError of the condensor temperature sensorError of the discharge temperature sensor1. No communication for 2 minutesbetween indoor units(Communication error for more than 2 minutes)2. Indoor unit receiving the communicationerror from outdoor unit3. Outdoor unit tracking 3 minutes error4. When sending the communication errorfrom the outdoor unit, the mismatchingof the communication numbers andinstalled numbers after completion oftracking(Communication error for more than 2 minutes)Power resetX X XXX XXXXXXXXXXXX On Flickering X Off If you turn off the air conditioner when the LED is flickering, the LED is also turned off.RemarksAbnormal conditionsIndicatorsBlue RedConcealed TypeStandard Type