SiBE041029EB TroubleshootingService Diagnosis 744.15 Input Overcurrent DetectionError Code E8Method of ErrorDetectionAn input overcurrent is detected by checking the input current value with the compressorrunning.Error DecisionConditionsThe current exceeds about 20 A for 2.5 seconds with the compressor running.(The upper limit of the current decreases when the outdoor temperature exceeds a certainlevel.)SupposedCauses Outdoor temperature is out of operation range. Defective compressor Defective power module Defective outdoor unit PCB Short circuitTroubleshootingCheck No.15Refer to P.96Check No.17Refer to P.98Check No.18Refer to P.98CautionBe sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.∗ An input overcurrent may result from wrong internal wiring. If the system is interrupted by an inputovercurrent after the wires have been disconnected and reconnected for part replacement, check thewiring again.(R18318)NOYESYESNOStart operation and measure theinput current.Check No. 18Check the discharge pressure.Check No. 17Check the installation condition.Check No.15Check with the inverter analyzer.Turn off the power and disconnectthe harnesses U, V, and W.Turn off the power, and reconnectthe harnesses. Turn on the poweragain and start operation.Replace the outdoor unitPCB.Correct the power supply orreplace the outdoor unitPCB.Any LED off?Input current flowingabove its stop level?∗ Inverter analyzer:RSUK0917C
