Daikin FTXV25AV1B Service Manual

Daikin FTXV25AV1B Service Manual Manual pdf 33 page image

SiK011003 Function and Control25Function and ControlThe condition and process of defrostingWhen frost is detected in the condenser, the system will enter into defrosting state. When defrosting starts, the compressor andindoor fan will stop, and the outdoor fan and four-way valve will delay 30 seconds to stop. The compressor will start after 15 secondsand then defrosting will be started. When the compressor has run for 7 minutes or defrosting is finished, the compressor will stop.After 30 seconds the four-way valve opens and after another 60 seconds, the compressor and outdoor fan resume running. Theindoor fan will delay 3 minutes to run at the latest.1.1.4 HEAT modeThe condition and process of heatingIf Tamb ≤Tpreset +2 , HEAT mode will act, the compressor, outdoor fan and reversal valve will run, the indoor fan will delay 3min tostop at the latestIf Tpreset +2˚C < T amb < Tpreset +5˚C ,the unit will keep running in the original mode.If Tamb ≥Tpreset +5˚C , the compressor will stop, the outdoor fan will delay 30sec to stop and indoor fan will blow 60S at low speed,the fan speed cannot be shifted within blow residual heat.In this mode, the temperature setting range is 16 ~30 .The air conditioner will adjust the running frequency of the compressor automatically according to the change of ambient temperature.When the unit is turned off in HEAT mode, or switched to other mode from HEAT mode, the four-way valve will be poweredoff after the compressor stops.Tpreset+5T preset+2Stop heatingOriginal operating statusStart heatingRunIndoor fanvalveOutdoor fanCompressorStopmin. min.min.Tamb ..nim.nimpreset wind preset windReversingThe period of defrostingFour-way valveCompressorOutdoor Unit30s30s15s30s60sIndoor Unit7min3min Set fan speedRun Stop1.1.3 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.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 Stopauto mode from dry mode.② The indoor unit displays the operation icon, operation mode icon and set temperature, but set temperature can’t be adjusted.③ Protection functions are the same as those in any other mode. (See function protection of this section)1.1.2.2 Fan mode① Fan conditions and processIn this mode, IDU fan motor runs at set speed while the compressor and ODU fan motor stop operation. The 4-way valve is de-energized. Temperature setting range is 16 ～ 30℃ .② The indoor unit displays operation icon and set temperature.③ Protection functions (See function protection of this section)③ Protection functionAnti-cold-wind protection