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Control Specification
SiBE041525F
29
Functions and Control
3.3
Controls at Mode Changing / Start-up
3.3.1 Preheating Control
Outline
The inverter operation in open phase starts with the conditions of the outdoor temperature, the
discharge pipe temperature, the radiation fin temperature, and the preheating command from
the indoor unit.
Detail
Outdoor temperature
≥
–2.5°C
→
Control A (preheating for normal state)
Outdoor temperature < –2.5°C
→
Control B (preheating of increased capacity)
Control A
ON condition
Discharge pipe temperature < 0°C
Radiation fin temperature < 85°C
OFF condition
Discharge pipe temperature > 2°C
Radiation fin temperature
≥
90°C
Control B
ON condition
Discharge pipe temperature < 10°C
Radiation fin temperature < 85°C
OFF condition
Discharge pipe temperature > 12°C
Radiation fin temperature
≥
90°C
3.3.2 Four Way Valve Switching
Outline
The four way valve coil is energized / not energized depending on the operation mode.
(Heating: ON, Cooling / Dry / Defrost: OFF) In order to eliminate the switching sound as the four
way valve coil switches from ON to OFF when the heating is stopped, the OFF delay switch of
the four way valve is carried out.
Detail
OFF delay switch of four way valve
The four way valve coil is energized for 160 seconds after the operation is stopped.
Summary of Contents for ARX20K2V1B
Page 12: ...SiBE041525F 1 List of Functions Part 1 List of Functions 1 Functions 2 ...
Page 15: ...SiBE041525F Specifications 4 Part 2 Specifications 1 Specifications 5 ...
Page 16: ...Specifications SiBE041525F 5 Specifications 1 Specifications See corresponding databook ...
Page 51: ...SiBE041525F Remote Controller 40 Part 5 Remote Controller 1 Remote Controller 41 ...