SiK011003
Function and Control
25
Function and Control
The condition and process of defrosting
When frost is detected in the condenser, the system will enter into defrosting state. When defrosting starts, the compressor and
indoor fan will stop, and the outdoor fan and four-way valve will delay 30 seconds to stop. The compressor will start after 15 seconds
and 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. The
indoor fan will delay 3 minutes to run at the latest.
1.1.4 HEAT mode
The condition and process of heating
If T
amb
≤T
preset
+2 , HEAT mode will act, the compressor, outdoor fan and reversal valve will run, the indoor fan will delay 3min to
stop at the latest
If T
preset
+2˚C < T
amb
< T
preset
+5˚C ,the unit will keep running in the original mode.
If T
amb
≥T
preset
+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 powered
off after the compressor stops.
T
preset
+5
T
preset
+2
Stop heating
Original operating status
Start heating
Run
Indoor fan
valve
Outdoor fan
Compressor
Stop
min.
min.
min.
T
amb
.
.
n
i
m
.
n
i
m
preset wind
preset wind
Reversing
The period of defrosting
Four-way valve
Compressor
Outdoor Unit
30s
30s
15s
30s
60s
Indoor Unit
7min
3min Set fan speed
Run
Stop
1.1.1 Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with
a 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in room
temperature;
1.1.3 Dehumidifying Mode
Working conditions and process of dehumidifying
If T
amb
. T
preset
, the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will operate
and 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 operate
at low speed.
1.1.2 COOL mode
The condition and process of cooling
If T
amb.
≥T
preset
COOL mode will act, the compressor and outdoor fan will run, and the indoor fan will run at the set
speed.
If T
amb.
≤T
prese
t-2 , the compressor will stop, the outdoor fan will delay 30 seconds to stop, and the indoor fan will run at the set speed.
If Tpreset-2 ≤T
amb
≤T
preset
, the unit will keep running in the previous mode.
In this mode, the reversal valve will not be powered on and the temperature setting range is 16 ~30 .
Protection function
Overcurrent protection
If total current is high, the compressor will run in limited frequency. If total current is too high, the
compressor will stop, the
outdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor
yellow light will blink 5 times.
Antifreezing protection
When the antifreezing protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and the
indoor fan and swing motor will keep running in the original mode. When antifreezing protection is eliminated and the
compressor has stopped for 3 minutes, the compressor will resume running in the original mode.
Protection
Protection is the same as that under the cooling mode.
During antifreeze protection
Compressor
Outdoor fan
Indoor fan
min
Preset speed
Run
Stop
Tpreset
Tpreset –2 ˚C
Compressor
Outdoor fan
Indoor fan
Run
Tamb.
Stop
Stop cooling
Start cooling
Original operating status
≥ 6 min.
≥ 3 min.
≥ 6 min.
Setting fan speed
Note:
Basic functions (the centigrade is used in the following function manual. If there will be
Fahrenheit degree, that will be Tf = Tc × 1.8 + 32).
Temperature Parameters
Indoor preset temperature (Tpreset)
Indoor ambient temperature (Tamb.)
auto 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 mode
①
Fan conditions and process
In 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 function
Anti-cold-wind protection
