Daikin FTXV25AV1B Service Manual

Daikin FTXV25AV1B Service Manual Manual pdf 36 page image

SiK011003Function and Control28 Function and Control1.2 F(A)TXV50AV1B/F(A)TTXV60AV1B1.2.1 General introduction1.2.1.1 DisplayAfter energizing, the unit will display all icons. Under standby status, running indicating icon is displayed in red. If the unit is started byremote controller, running indicating icon is displayed in green (the color may be different for different models); meanwhile, the icon ofcurrent running mode will be displayed (mode icons: cooling, heating and dry mode).1.2.1.2 Temperature parameters◆ Indoor set temperature (Tset)◆ Indoor ambient temperature (Tamb.)◆ Indoor evaporator inner tube temperature (Tinner tube)◆ Indoor condenser outer tube temperature (Touter tube)◆ Outdoor discharge pipe temperature (Tdischarge)◆ Outdoor IMP module temperature (Tmodule)1.2.2 Introduction of basic mode functionOnce the compressor is energized, there should be a minimum interval of 3 mins between two start-ups.If the unit is with memory function and is off before power failure, the compressor can be restarted without an interval of 3 mins after thesystem is energized; if the unit is on before power failure, the compressor will be restarted with an interval of 3 mins.Once started, the compressor won’t stop within 7 mins according to the change of room temp.1.2.2.1 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 ambienttemperature. 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 the previousoperation mode when it enters auto mode from cooling, heating or fan mode; the unit will run in fan mode when it enters auto modefrom 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)1.2.2.2 Cooling mode① Cooling conditions and process◆ When Tamb. ≥Tset-0.5℃ , the unit starts cooling. In this case, the compressor and the ODU fan motor run, and the IDU fan motor runsat set speed.◆ When Tamb. ≤Tset-2℃ , the compressor and the ODU fan motor stop after a few seconds, while the IDU fan motor runs at set speed.◆ When Tset-2℃＜ Tamb. ＜ Tset-0.5℃ , the unit will maintain its present operation status.◆ When the unit stops due to malfunction or protection, the compressor and ODU fan motor stop, while the IDU maintains its presentoperation status.◆ In cooling process, when Tamb. is quite different from Tset, the compressor will run in relatively high frequency for quick cooling; whenTamb. is near Tset, the compressor frequency will decrease automatically for high coziness and efficiency.In this mode, the 4-way valve is de-energized. Temperature setting range is 16 ～ 30℃ .