Daikin FTXV25AV1B Service Manual

Daikin FTXV25AV1B Service Manual Manual pdf 32 page image

SiK011003Function and Control24 Function and Control1.1 F(A)TXV25AV1B/F(A)TXV35AV1B1. Function and Control1.1.1 Basic FunctionsOnce energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memoryfunction is available, for the first energization, if the compressor is at stop before de-energization, the compressor will bestarted without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started witha 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in roomtemperature;1.1.3 Dehumidifying ModeWorking conditions and process of dehumidifyingIf T amb. T preset, the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will operateand the indoor fan will run at low speed.If T preset -2 T amb . T preset, the compressor remains at its original operation state.If T amb .< T preset -2 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will operateat low speed.1.1.2 COOL modeThe condition and process of coolingIf Tamb. ≥Tpreset COOL mode will act, the compressor and outdoor fan will run, and the indoor fan will run at the set speed.If Tamb. ≤Tprese t-2 , the compressor will stop, the outdoor fan will delay 30 seconds to stop, and the indoor fan will run at the set speed.If Tpreset-2 ≤T amb ≤Tpreset , the unit will keep running in the previous mode.In this mode, the reversal valve will not be powered on and the temperature setting range is 16 ~30 .Protection functionOvercurrent protectionIf total current is high, the compressor will run in limited frequency. If total current is too high, the compressor will stop, theoutdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor yellow light will blink 5 times.Antifreezing protectionWhen the antifreezing protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and theindoor fan and swing motor will keep running in the original mode. When antifreezing protection is eliminated and thecompressor has stopped for 3 minutes, the compressor will resume running in the original mode.ProtectionProtection is the same as that under the cooling mode.During antifreeze protectionCompressorOutdoor fanIndoor fanminPreset speedRun StopTpresetTpreset –2 ˚CCompressorOutdoor fanIndoor fanRunTamb.StopStop coolingStart coolingOriginal operating status≥ 6 min. ≥ 3 min. ≥ 6 min.Setting fan speedNote: Basic functions (the centigrade is used in the following function manual. If there will beFahrenheit degree, that will be Tf = Tc × 1.8 + 32).Temperature ParametersIndoor preset temperature (Tpreset)Indoor ambient temperature (Tamb.)1.1.2.1 Auto mode① Auto mode conditions and processIn this mode, the unit will automatically select its operation mode (cooling, heating or fan) according to the change of indoor ambi-ent temperature. There is a 30-second delay protection for mode switchover.When Tamb.≥26℃ , the unit runs in cooling mode; in this case, the factory default set temperature is 25℃ .For cooling and heating model: when Tamb.≤22℃ , the unit runs in heating mode; in this case, the factory default set temperature is20℃ .For cooling only model: when Tamb.≤22℃ , the unit runs in fan mode; in this case, the factory default set temperature is 25℃ .When 22 ℃ ＜ Tamb. ＜ 26 ℃ : the unit will run in fan mode when it enters auto mode just after power on; the unit will keep theprevious operation mode when it enters auto mode from cooling, heating or fan mode; the unit will run in fan mode when it enters