Description Of Each Control Operation; Cooling Mode; Dry Mode; Heating Mode - Toyotomi TAG-A16 HDI Service Manual

Indoor Unit
1Temperature Parameters
Indoor preset temperature (Tpreset)
Indoor ambient temperature (Tamb.)
2 Basic functions (The temperature in this manual is expressed by Centigrade. If Fahrenheit is used, the switchover between them is
Tf=TcX1.8+32.)
Once the compressor is energized, there should be a minimum interval of 3 minutes between two start-ups. But if the unit is
de-energized and then energized, the compressor can restart within 3 minutes.

2.1 Cooling mode

2.1.1 Cooling conditions and process
When Tamb. ≥Tpreset, the unit starts cooling operation. In this case, the compressor and the outdoor fan operate and the indoor fan
operates at set speed.
When Tamb. ≤Tpreset-3 , the compressor and the outdoor fan stop while the indoor fan runs at set speed.
When Tpreset-3 Tamb.
In cooling mode, temperature setting range is 16 30 ; the indoor unit displays operation icon, cooling icon and set temperature.
T
preset
T
preset
Compressor
Outdoor fan
Indoor fan
2.1.2 When outdoor unit has malfunction or stops for protection, indoor unit will keep previous operation status and display malfunction
code.
2.1.3 The protection status is as the same as the cooling mode.

2.2 Dry Mode

2.2.1 Dry Conditions and Process
When Tamb. Tpreset, the unit starts drying and cooling operation. In this case, the compressor and the outdoor fan operate; the
indoor fan operates at low speed.
When Tpreset-3 ≤Tamb. ≤Tpreset, the unit will start drying operation. In this case, the indoor fan operates at low speed; the
compressor and the outdoor fan operate for 6 minutes and stop for 4 minutes in cycle.
When Tamb. Tpreset-3 , the compressor and the outdoor fan stop operation; the indoor fan operates at low speed.
In drying mode, the four-way valve is de-energized; temperature setting range is 16 30 ; the indoor unit displays operation icon,
drying icon and set temperature.
2.2.2 When outdoor unit has malfunction or stops for protection, indoor unit will keep previous operation status and display malfunction
code.
2.2.3 The protection status is as the same as the cooling mode.
2.3 Heating mode (not available for cooling only type)
2.3.1 Heating conditions and process
When Tamb. ≤Tpreset+2 , the unit starts heating operation. In this case, compressor and outdoor fan operate simultaneously; the
indoor fan operates at cold-air prevention mode.
When Tamb≥Tpreset+5 , the compressor and outdoor fan stop operation; the indoor fan blows residual heat.
When T +2 T
preset amb.
Under this mode, temperature setting range is 16 30 ; the indoor unit displays operation icon, heating icon and set temperature.
Tpreset, the unit will maintain its previous running status.
T
amb
+1
1
min min
.
Set Fan speed
Run
T
amb.
T +2
preset
T 2
preset
Compressor
Outdoor fan
Indoor fan
Run
T +5 , the unit will maintain its previous running status.
preset
Start cooling
Original operating status
Stop cooling
min
.
.
Stop
min min.
.
min.
min.
Low speed
Stop
Cooling
Dehumidfying
Stop