SiBE041134EB TroubleshootingService Diagnosis 734.10 Outdoor Unit PCB AbnormalityError Code E1Method of ErrorDetection The system checks if the microprocessor is working in order. The system checks if the zero-cross signal comes in properly.Error DecisionConditions The microprocessor program runs out of control. The zero-cross signal is not detected.SupposedCauses Defective outdoor unit PCB Broken harness between PCBs Noise Momentary drop of voltage Momentary power failureTroubleshooting RXS20/25K2V1B, RXS20/25K3V1B, RXS20/25L2V1B, ARXS25L2V1BCautionBe sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.Continuously ON or OFFBlinkCheck the voltage of theconnection wires on the indoorterminal board between No. 1and No. 2.NOYESReplace the connection wiresbetween the indoor unit andoutdoor unit.Normal?YES(R22770)NOYESNOReplace the outdoor unitPCB (main PCB).Ground the system.Zero-cross signalabnormality.Replace the outdoor unitPCB (filter PCB).Replace the harness.Check if the outdoor unit isgrounded.Is LED A blinking?Grounded?Is the harnessbroken?Turn on the power again.∗ Before you check the LED A,cancel the standby electricitysaving function by starting fanoperation with the remotecontroller.∗ Wait at least for 7 sec. afterturning on the power.
