1 - 7
2WAY SYSTEM
Control Functions-Outdoor Unit
1
3. Compressor Control
*The evaporation temperature area changes depending on the maximum required level of each indoor unit as
shown above.
*C area is regarded as B area for 6 minutes after compressor starts.
*When the system operates in a minimum capacity, the system will continue operating for at least 6 minutes if the
evaporation temperature area is C area.
*The evaporation temperature is not adjusted while specially controlling defrosting and the oil recovery, etc.
*The evaporation temperature is not adjusted when there are one or more indoor units that select the test run.
If one or more indoor units are selected into test run, the system doesn't stop in all states except alarm appearing.
*The test run will finish automatically in about one hour.
Compressor capacity can increase
6.5
Te_tgt_max.
Compressor capacity
cannot increase
Compressor capacity decreases
Max. required level
15
0
6.0
3.0
deg
2.5
Te_tgt_min.
6.0
3.0
16.0
13.0
30
11.0
8.0
B area
C area
A area
Evaporation temperature area
Condensation temperature area at cooling operation
3-6-2. Condensation temperature adjustment by roadmap control
Target temperature of the B area is different between cooling and heating operation.
Target lower temperature
(Tc_tgt_min)
Target upper temperature
(Tc_tgt_max)
Cooling 53.0℃ 55.0℃
Heating 48.0℃ 51.0℃
-Cooling operation
The purpose of this control at cooling is to prevent abnormal high-pressure.
Compressor capacity can increase
Compressor capacity cannot increase
Thermostat OFF
Compressor capacity decreases
Tc_tgt_max.
Tc_tgt_min.
B area
A area
C area
SM830204-05_2WAY SYS.indb 7 2015/01/21 16:59:59
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