5
5
Service Manual
Technical Information
6.4 Brief Description of Modes and Functions
1.Temperature 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
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.
(1)Cooling mode
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-2°C, the compressor will stop, the outdoor fan will delay 30 seconds to stop, and the indoor fan will run at the
set speed.
When Tpreset-2°C<Tamb.<Tpreset, the unit will maintain its previous running status.
In cooling mode, temperature setting range is 16~30°C; the indoor unit displays operation icon, cooling icon and set temperature.
②
When outdoor unit has malfunction or stops for protection, indoor unit will keep previous operation status and display malfunction
code.
(2)Dry Mode
When Tamb.>Tpreset, the unit operates in cooling mode. Meanwhile, compressor and outdoor fan operate, and indoor fan operates at
set fan speed (low fan speed, quiet fan speed or auto quiet fan speed).
When Tpreset-2°C<Tamb. ≤Tpreset, the unit keeps previous operation status.
When Tamb.≤Tpreset-2°C, the compressor will stop, the outdoor fan will stop with a time lag of 30s and indoor fan operate at set fan
speed (low fan speed, quiet fan speed or auto quiet fan speed).
Under this mode, the temperature setting range is 16~30°C. Display displays operation icon, drying icon and set temperature.
(3)Heating mode (not available for cooling only type)
①
Heating conditions and process
When Tamb. ≤2°C, 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.≥5°C,the compressor will stop, the outdoor fan will stop with a time lag of 30s; the indoor fan blows residual
heat.
When 2°C<Tamb.<T5°C, the unit will maintain its previous running status.
Under this mode, temperature setting range is 16~30°C; the indoor unit displays operation icon, heating icon and set temperature.
Tpreset
Tpreset –2 ˚C
Compressor
Outdoor fan
Run
Tamb.
Stop
Stop cooling
Start cooling
Original operating status
≥ 6 min.
30S
30S
≥ 3 min.
≥ 6 min.
Set fan speed
Tpreset
Tpreset –2 ˚C
Compressor
Outdoor fan
Indoor fan
Run
Tamb.
Stop
Stop drying
Start drying
Original operating status
≥ 6 min.
30S
30S
≥ 3 min.
≥ 6 min.
Set fan speed
Tpreset
Tpreset –2 ˚C
Compressor
Outdoor fan
Indoor fan
Run
Tamb.
Stop
Stop cooling
Start cooling
Original operating status
≥ 6 min.
30S
30S
≥ 3 min.
≥ 6 min.
Set fan speed
Tpreset
Tpreset –2 ˚C
Compressor
Outdoor fan
Run
Tamb.
Stop
Stop drying
Start drying
Original operating status
≥ 6 min.
30S
30S
≥ 3 min.
≥ 6 min.
Set fan speed
●
Indoor Unit
