1 - 9
3WAY SYSTEM
Control Functions
1
3. Compressor Control
Compressor Control Table
Low Condensation Temp. [Tc] High
ABCD
Low Evaporation Temp. [Te] High
UP
STOP
slow_UP Target
DOWN
A
B
C not_UP
not_UP
Evaporation temperature (Te) and condensation temperature (Tc) areas A, B, C, and D are the same as for
evaporation temperature control and condensation temperature control.
(2) Increasing/decreasing the heat exchanger capacity (when the outdoor unit heat exchanger is functioning as a
condenser)
• Primarily when both the evaporation temperature (Te) and condensation temperature (Tc) are high
This occurs when the cooling capacity (heat intake) is low and the heating capacity (heat discharge) is high.
The outdoor heat exchanger capacity is increased, increasing the system condensation capacity and lowering
the condensation temperature (Tc). The amount of heat discharge at the outdoor unit heat exchanger is
increased, increasing the heat intake at the cooling mode indoor units and lowering the evaporation
temperature (Te).
• Primarily when both the evaporation temperature (Te) and condensation temperature (Tc) are low
This occurs when the cooling capacity (heat intake) is high and the heating capacity (heat discharge) is low.
The outdoor heat exchanger capacity is decreased, decreasing the system condensation capacity and raising
the condensation temperature (Tc). The amount of heat discharge at the outdoor unit heat exchanger is
decreased, decreasing the heat intake at the cooling mode indoor units and raising the evaporation
temperature (Te).
Outdoor Unit Heat Exchanger Control Table (when the outdoor unit heat exchanger is functioning as a
condenser)
Low←Evaporation Temp. [ Te
㼉
→High
B
㻯
㻭
Compressor stop
UP
DOWN
STAY
STAY
BD
㻭㻯
Low䚷䚷䚷 䊹 Condensation Temp. [Tc] → High
Target
6°C
2°C
-1°C
-6°C
-8°C
-9°C
43.5°C
51°C
53°C
58°C
54°C
54.5°C
48°C
46°C
47°C
SM830226-003WAYECO-iSYSTEM.in99SM830226-003WAYECO-iSYSTEM.in99 2013/02/1311:52:242013/02/1311:52:24
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