SiK011003
Function and Control
30
Function and Control
fan motor blows residual heat for a while at set speed to prevent high temperature inside the unit.
◆
When Tset+3.5
℃＜
Tamb.
＜
Tset+5
℃
, the unit will maintain its previous operation status.
◆
When the unit stops due to malfunction or protection, the compressor, IDU fan motor and ODU fan motor stop operation.
◆
In heating process, when Tamb. is quite different from Tset, the compressor will run in relatively high frequency for quick heating;
when Tamb. is near Tset, the compressor frequency will decrease automatically for high coziness and efficiency.
In this mode, the 4-way valve is energized. Temperature setting range is 16
～
30
℃
.
②
The indoor unit displays operation icon, heating icon and set temperature.
③
Defrost conditions and process
In order to ensure heating effect, the unit will defrost automatically according to the frost status of outdoor unit. heating indicator on in-
door unit will ON 10s and OFF 0.5s successively during defrosting.
④
Protection functions (See function protection of this section)
1.2.2.6 Compressor control function
①
The controller controls the operation frequency of compressor according to the relationship between ambient temperature and set
temperature and the changing speed of ambient temperature.
②
When turning on the unit in cooling, heating or dry mode, the compressor starts after the ODU fan motor has operated for 5
seconds
.
③
The compressor stops immediately when turning off the unit, switching to fan modes and unit stops for protection.
④
In each mode: once started, the compressor won’t stop within 7 mins (note: including stop operation when reaching the temperature
point; not including malfunction protection, turning off the unit by remote controller or switching modes in which stopping operation of
compressor is needed).
⑤
In each mode: once stopped, the compressor won’t start again within 3 mins; if the unit is with memory function, the compressor can
be restarted without delay when turning off the unit and then energizing again.
1.2.2.7 4-way valve control function
①
The 4-way valve is de-energized in cooling, dry and fan mode;
②
The 4-way valve is energized in heating mode;
③
When turning off the unit in heating mode or switching to other mode from heating mode, the compressor stops and the 4-way valve
is de-energized after a while;
④
When the unit stops for protection, the 4-way valve is de-energized after a while;
⑤
When starting defrosting, the compressor stops and the 4-way valve is de-energized after a while;
⑥
When existing defrosting, the compressor stops and the 4-way valve is energized after a while;
1.2.3.Other control functions
1.2.3.1 Timer function
General timer: the timer precision is 30min and set unit ON/OFF after a desired hour.
◆
Timer ON: timer ON can be set at unit OFF. If selected ON time is reached, the unit will start to run according to previous setting
status. Time setting range is 0.5~24hr in 30-minute increments.
◆
Timer OFF: timer OFF can be set at unit ON. If selected OFF time is reached, the unit will stop. Time setting range is 0.5~24hr in
30-minute increments.
T
5 C
T
3.5 C
valve
Outdoor unit
Intdoor unit
Compressor
min.
min.
T
amb
.
Set fan speed
Set fan speed
Reversing
7 min.
3 min.
7 min.
Start heating
Original operating status
Stop heating
