ESIE12-06 Troubleshooting by LED IndicationsService Diagnosis 1773. Troubleshooting by LED Indications3.1 Troubleshooting by LED on the Indoor UnitForewordTroubleshooting can be carried out by service monitor LED (green). (Blinks when normal)k : LED on / h : LED off / l : LED blinksNote:1. When the INSPECTION/TEST button of remote controller is pushed, INSPECTION display blinks enteringINSPECTION mode.2. In the INSPECTION mode, when the ON/OFF button is pushed and held for 5 seconds or more, theaforementioned error history display is OFF. In this case, after the error code blinks 2 times, the codedisplay turns to “00” (=Normal) and the unit No. turns to “0”. The INSPECTION mode automaticallyswitches to the normal mode (set temperature display).3. Operation halts due to error depending on the model or condition.4. Troubleshoot by turning OFF the power supply for a minimum of 5 seconds, turning it back ON, and thenrechecking the LED display.3.2 Troubleshooting by LED on Outdoor Unit PCBThe following diagnosis can be conducted by turning ON the power switch and checking the LED indicationon PCB (A1P) of the outdoor unit.k : LED on / h : LED off / l : LED blinksNote:1. Turn OFF the power supply, and turn it ON again after 5 seconds or more. Check the error condition, anddiagnose the problem.2. Turn OFF the power supply. After 5 seconds or more, disconnect the connection wire (2). Then turn ONthe power supply. If the HAP on the outdoor unit PCB flashes after about 10 seconds, the indoor unit PCBis faulty.3. Also check for open phase.Remark:The error detection monitor continues to indication the previously generated error until the power supply isturned OFF.Be sure to turn OFF the power supply after inspection.Micro-computerNormal Monitor Contents/ProcessingHAP (LED-A)l Indoor unit normal Outdoor unit troubleshootingl Incorrect transmission wiring between indoor and outdoor unitIf outdoor unit’s LED-A is OFF, proceed outdoor unit’s troubleshooting. If outdoor unit’sLED-A blinks, defective wiring or indoor or outdoor unit PCB assy.k Defective indoor unit PCB assyh Defective power supply or defective PCB assy or broken transmission wire between indoorand outdoor unit.LED detectionDescriptionHAP H1P(Green) (Red)l h Normalk — Defective outdoor unit PCB (Note 1)h — Power supply abnormality, or defective outdoor unit PCB (Note 2)l k Activation of protection device (Note 3)
