2021.2 Indoor unit Function1.3.1 Sign DefinitionIndoor OutdoorTai Tc1 Tc2 Tm Tao Toci Tc Te Ts TdAmbientTempOutletPipeTemp.Inlet PipeTempMid CoilTempAmbientTempThick Pipeof HeatExchangerMidCondenserTemp.DefrostTempCompressorSuctionTemp.CompressorDischargingTemp.Tcomp1,2 TsetTemp. Compensation SetTemp.1.3.2 Dry OperationTai < 16o C, indoor unit stops running and sends stop-unit signal to outdoor.Tai≤Tset, indoor motor runs at low speed and sends stop-unit signal to outdoor1.3.3 Fan OperationIndoor fan motor will run as the fan speed set on the remote controller or the wired controller and indoor unit willsend the stop-unit signal to outdoor.1.3.4 Auto OperationA: If the unit enters Auto mode for the first time, the system will adjust the operation mode according to the roomtemp. and the set temp.When Tai ≥ Tset, entering auto cooling mode;When Tai < Tset, entering auto heating mode.B: Auto cooling mode is as the same as the cooling mode. After the thermostat is OFF for 15 minutes, if Tai+1+Tcomp2 < Tset, the unit will enter auto heating mode, or the unit will still stay at auto cooling mode and stopwhen it reaches the set temperature; while the indoor motor will be at low speed.C: Auto heating mode is as the same as the heating mode. After the thermostat is OFF for 15 minutes, if Tai≥Tset+1+Tcomp1, the unit will enter auto cooling mode, or the unit will still stay at auto heating mode;D: In this mode, the Sleep function is available, run as cooling sleep in cooling mode and as heating sleep inheating mode. Once sleep mode is set, the mode will not change after the unit stops for 15 minutes when it arrivesTset.E: Mode conversion will be confirmed after compressor has stopped for 10 minutes.1.3.5 Abnormal OperationA: When outdoor modes from the request of indoor unit conflict, the one entering firstly will take priority.B: After indoor receives the ON command from wired controller, it will firstly confirm the outdoor current operationmode. If they are the same modes, indoor unit will run as the request of remote controller. If they are differentmodes, the system will forbid to operate, and indoor will keep the OFF mode and send the “standby” signal to wiredcontroller until outdoor stops or outdoor mode the requested mode of wired controller are the same, the unit will runas the requested mode of wired controller.C: After indoor receives the ON command from remote controller, it will firstly confirm the outdoor current operationmode. If they are the same mode, indoor unit will run as the request of remote controller. If they are different modes,the system will forbid to operate, and indoor will keep the OFF mode. After setting on remote controller, if the buzzersounds two times, that shows abnormal operation. Indoor will run until the outdoor mode and the requested modeof remote controller are the same.D: In AUTO mode, when the indoor unit occurs abnormal operation, the indoor unit will keep OFF state, and thebuzzer will not sound until the outdoor mode and the requested mode of indoor unit are the same.F: COOL (included AUTO COOL), DRY, FAN are not abnormal mode.G: HEAT and FAN are not abnormal mode.