Troubleshooting by Remote Controller SiME281501E91 Service Diagnosis4.4 Error of External Protection DeviceError Code A0ApplicableModelsFCQMethod of ErrorDetectionDetect open or short circuit between external input terminals in indoor unit.Error DecisionConditionsWhen an open circuit occurs between external input terminals with the remote controller set to"external ON/OFF terminal."SupposedCauses Actuation of external protection device Improper field setting Defective indoor unit PCBTroubleshootingActuation of external protectiondevice.Externalprotection device isconnected to terminals T1 andT2 of the indoor unitterminal block.Replace the indoor unit PCB.YESChange the second code No. to"01" or "02".ExternalON/OFF input (modeNo. 12, first code No. 1) hasbeen set to external protectiondevice input (second codeNo. 03) by remotecontroller.YESNOCaution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.Check the setting state of theON/OFF input from outside by remotecontroller.NO
