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2.2.2 Protection
◆ Freeze protection
During drying and cooling operation, if the system is under freeze protection, the compressor and outdoor fan stop operation while
indoor fan operates at low speed. If freeze protection is eliminated and the compressor has been out of operation for 3 minutes, the
complete unit will resume its previous running status.
During the cycle of on for 6 min and off for 4 min, if freeze protection is detected, the compressor and the outdoor fan will stop
operation; the indoor fan will operate at low speed. When freeze protection is eliminated and the compressor has been out of operation
for 4 minutes, the complete unit will resume its previous running status.
2.2.3 Other protection
Other protections are the same as those in cooling mode.
2.3 Heating mode
2.3.1 Heating conditions and process
When Tamb. ≤Tpreset+2 ℃ , the unit starts heating operation. In this case, the 4-way valve, compressor and outdoor fan operate
simultaneously; the indoor fan operates with a maximum delay of 2 minutes.
When Tamb≥Tpreset+4℃ , the compressor and outdoor fan stop operation. The 4-way valve remains energized; the indoor fan blows
residual heat.
When Tpreset +2℃＜ T amb. ＜ Tpreset +4℃ , the unit will maintain its previous running status.
Under this mode, the 4-way valve is energized; temperature setting range is 16 ～ 30℃ ; the indoor unit displays operation icon, heating
icon and set temperature
2.3.2 Defrosting Conditions and Process
With intelligent defrosting function, the unit defrosts automatically according to the actual condition. The indoor unit displays "H1".
2.3.3 Protection Functions
◆ Overheating Prevention Protection
If the evaporator tube temperature overheats, the outdoor fan stops operation. When the tube temperature returns to normal, the
outdoor fan resumes operation.
◆ Noise Silencing Protection
If the unit is turned off by pressing ON/OFF button or during mode switchover, the 4-way valve stops with a delay of 2 minutes.
2.4 Fan mode
In fan mode, indoor fan operates at set speed while the compressor and outdoor fanstop operation.
In this mode, temperature setting range is 16 ～ 30℃ . The indoor unit displays operation icon and set temperature.
2.5 Auto Mode
In AUTO mode, the unit will automatically select its operation mode (cooling or fan) with the change of ambient temperature. The indoor
unit displays the operation icon, operation mode icon and set temperature. There is a 30-second delay protection for mode switchover.
16
T
amb.
T
+2
preset
T
2
preset
Compressor
Outdoor fan
Indoor fan
Run
T
+4
preset
T
+2
preset
T
.
amb
m
i
. n
Compressor
Outdoor fan
preset speed
Indoor fan
min.
4-way
valve
Run
min
min.
.
min.
min.
Low speed
Stop
Stop heating
Original operating status
Start heating
min.
m
i
. n
min.
preset speed
Stop
Function and Control
Cooling
Dryin g
Stop
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