19
Technical Information
Service Manual
When Tamb. ˚Tpreset+2ć, the unit starts drying and cooling operation. In this case, the compressor and outdoor fan
operates and the indoor fan operates at low speed.
When Tpreset-2ć≤Tamb. ≤Tpreset+2ć, the unit will start drying operation. In this case, the indoor fan operates at low
speed, and the compressor and the outdoor fan operate 6 minutes and stop 4 minutes in cycle.
When Tamb.˘Tpreset-2ć, the compressor and the outdoor fan stops operation while the indoor fan operates at low
speed.
In this mode, the four-way valve is de-energizing. The temperature setting range is 1630ć and the indoor unit displays
operation icon, dry icon and set temperature.
Tpreset +2 ˚C
Tpreset –2 ˚C
Tamb.
Compressor
Outdoor fan
Indoor fan
Cooling
6 min.6 min.
4 min. 4 min.
low speed
Run
Stop
Drying
Stop running
Protection
ƹ Antifreezing protection
During drying and cooling operation, if the system is under antifreezing protection, the compressor and outdoor fan stop
operation while indoor fan operates at low speed. If antifreezing protection is eliminated and the compressor has been
stopped for 3 minutes, the complete unit will resumes its previous operation status.
During the cycle stage of operating 6 minutes and stopping 4 minutes, if antifreezing protection is detected, the compressor
and the outdoor fan will stop operation and the indoor fan will operate at low speed. When the antifreezing protection is
eliminated and the compressor has been stopped for 4 minutes, the complete unit will resume its previous operation state.
Ĺ Other protection
Other protections are the same as those in cooling mode.
(3)Heating mode (not available for cooling only type)
ķ
Heating conditions and process
When Tamb. ≤Tpreset+2ć, the unit starts heating operation. In this case, the 4-way valve, compressor and outdoor fan
operate simultaneously. The indoor fan operates after 2 minutes at most.
When Tamb≥Tpreset+4ć, the compressor and outdoor fan stop operation. The 4-way valve remains energizing and the
indoor fan will stop operation after operate at setting fan speed for 60s.
When T
preset
+2ć˘T
amb.
˘ T
preset
+4ć, the unit will maintain its previous operation status.
In this mode, the 4-way valve is energizing. The temperature setting range is 1630ć and the indoor unit displays
operation icon, heating icon and set temperature.
ĸDefrosting Conditions and Process
With intelligent defrosting function, the unit can automatically defrost according to the actual condition. The indoor unit
T
preset
+4
T
preset
+2
Stop heating
Original operating status
Start heating
Run
Indoor fan
valve
Outdoor fan
Compressor
Stop
min.
min.
min.
T
amb
.
.nim.nim
preset wind
preset wind
Reversing
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