Service Manual
Technical Information
37
6.5 Function Introduction
1 Basic Function
1.1 Cooling mode
1.1.1 Cooling condition and process
a. When Tindoor amb. 1
2
, the unit operates in cooling mode. Meanwhile, compressor and outdoor
fan operate and indoor fan operates at set fan speed.
b. When Tindoor amb. Tpreset-1
2
, compressor and outdoor fan stop operation, while indoor fan operates at
set fan speed.
c. When Tpreset-1
2
<Tindoor amb.<1
2
, the unit keeps original operation status.
1.1.2 In this mode, the set temperature range is 16 ~30
61 ~86
1.2 Dry Mode
Dry Conditions and Process
a. When Tamb. 2 (4 ), the unit will operate in Cool mode, and the fan will run at low speed.
b. When Tpreset-2 (4 ) Tamb. 2 (4 ), the unit will operate in Dry mode. In that case, the indoor fan will operate
at low speed. The compressor and the outdoor fan will stop for 6 min and operate for 4min circularly.
c. When Tamb. Tpreset-4 (2 ), the compressor will stop working and the fan will operate at low speed.
Under this mode, the setting temperature range is 16~30
61~86
1.3 Heating mode
1.4.1 When Tindoor amb. 1
, the unit will operate at heating mode. Meanwhile, 4-way valve and compressor will
operate. Fan will operate at cold air prevention condition;
1.4.2 When Tindoor amb. T 3
6
, compressor will stop operation while 4-way valve will be energized. Fan will
operate at blowing residual heat mode.
1.4.3 When T 1
Tindoor amb T 3
the unit will keep its previous operation status;
1.4.4 Under this mode, the temperature setting range is 16-30 (61-86 ).
1.4 Fan mode
a. In this mode, compressor and electric heating pipe will stop operation and fan will operate at set speed.
b. In this mode, the set temperature range is 16 ~30
61 ~86
.
1.6. Auto Mode
Working conditions and process
a. When Tamb. 26 (79
), the unit will operate in Cool mode. Tpreset=25
77
b. When Tamb. 22 (72
), the heat pump unit will operate at heating mode and the cooling only unit will operate at fan mode;
Tpreset=20
68
;
When 22 (72 ) Tamb. 26 (79 ) , the unit will maintain its previous running state. When the unit enters into auto mode
for the first time, it will operate at fan mode.
