SiBE041434E
Control Specification
Function and Control
40
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 preheating command from
the indoor unit, the outdoor temperature, the discharge pipe temperature, and the radiation fin
temperature.
Detail
Outdoor temperature
≥
A
°C
→
Control I
Outdoor temperature <
A
°C
→
Control II
Control I
ON condition
Discharge pipe temperature <
B
°C
Radiation fin temperature <85°C
OFF condition
Discharge pipe temperature >
C
°C
Radiation fin temperature
≥
90°C
Control II
ON condition
Discharge pipe temperature <
D
°C
Radiation fin temperature <85°C
OFF condition
Discharge pipe temperature >
E
°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. (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.
A
(°C)
B
(°C)
C
(°C)
D
(°C)
E
(°C)
–2.5
0
2
10
12
Summary of Contents for FTXM-K Series
Page 16: ...SiBE041434E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 18: ...SiBE041434E 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 66: ...SiBE041434E 51 Remote Controller Part 5 Remote Controller 1 20 25 Class 52 2 35 42 50 Class 54...
Page 137: ...Revision History Month Year Version Revised contents 02 2015 SiBE041434E First edition...