5-555-3. PAC System Alarm CodesAlarmCode Alarm MeaningE01E02E03E04E05E06 Outdoor Unit Failed to Receive Serial Communication Signals from Indoor UnitError in Indoor Unit Transmitting Signal to the Outdoor UnitError in Indoor Unit Receiving Signal from the Outdoor UnitError in Indoor Unit Receiving Signal from Remote Controller (central)Remote Controller Transmission ErrorRemote Controller Reception ErrorE14E15 Automatic Address Alarm (The total capacity of indoor units is too low.)Main Unit duplication in Simultaneous-operation Multi Control (detected outdoor unit)E18E20 Connection Problem of Indoor/Outdoor Units.Faulty Communication in Group Control WiringE16 Automatic Address Alarm (The total capacity of indoor units is too high or the total number of indoor units istoo many.)F04F06F07 Intermediate Temperature Sensor (C2) in Heat Exchanger TroubleInlet Temperature Sensor (C1) in Heat Exchanger TroubleCompressor Discharge Temperature Sensor (TD) TroubleF08F12F31 Outdoor Unit Nonvolatile Memory (EEPROM) TroubleCompressor Inlet Suction Temperature Sensor (TS) TroubleOutdoor Air Temperature Sensor (TO) TroubleH01H02H03H31 HIC TroublePrimary Current CT Sensor (current sensor) FailureL04L10L18Outdoor Unit Capacity not Set or Invalid4-way Valve Operation FailureL13 Indoor Unit Type Setting ErrorOutdoor Unit Address DuplicationPAM TroublePrimary (input) Overcurrent DetectedE08E09E12 Automatic Address Setting Start is Prohibited while Auto-address Setting in Progress.More Than One Remote Controller Set to Main ErrorDuplicate Indoor Unit Address Settings ErrorP03P04P05P13P14P16 Compressor Overcurrent TroubleP15 Insufficient Gas Level DetectedO 2 Sensor DetectAlarm Valve OpenAC Power Supply TroubleHigh Pressure TroubleCompressor Discharge Temperature TroubleP22P29P31Lack of INV compressor wiring, INV compressor actuation failure (including locked), DCCT failureGroup Control ErrorOutdoor Unit Fan Motor TroubleAlarms for outdoor units
