SiUS04-904 Troubleshooting112 Service Diagnosis4.10 Input Overcurrent Detection4.10.1 09/12 ClassRemoteControllerDisplayE8Method ofMalfunctionDetectionAn input overcurrent is detected by checking the input current value with the compressor running.MalfunctionDecisionConditions The following current with the compressor running continues for 2.5 seconds.Cooling · Heating: Above 12ASupposedCauses Overcurrent due to compressor failure Overcurrent due to defective power transistor Overcurrent due to defective outdoor unit PCB Error detection due to outdoor unit PCB Overcurrent due to short-circuitTroubleshootingCheck No.07Refer to P.147Check No.08Refer to P.147(R10498)CautionBe sure to turn off the power switch before connecting or disconnectingthe connector, or parts damage may occur.* An input overcurrent may result from wrong internal wiring. If the wires have been disconnected andreconnected for part replacement, for example, and the system is interrupted by an input overcurrent,check the wires again.NOYESYESNOGet restarted and measure theinput current.Check No. 08Check the discharge pressure.Check No. 07Check the installation condition.Check with the inverter checker (*).Turn off the power and disconnectthe harnesses U, V and W.Turn off the power, and reconnectthe harnesses. Turn on the poweragain and get restarted.Replace the outdoor unitPCB.Correct the power supply orreplace the outdoor unitPCB.Any LED off?Input currentflowing above its stop level?* Inverter checkerPart No.: 1225477
