Specifications

SiBE06-708 Control Specification
Function and Control 35
3.3 Controls at Mode Changing / Start-up
3.3.1 Preheating Operation
Outline

25/35 class
Operate the inverter in the open phase operation with the conditions including the preheating
command from the discharge pipe temperature.

50 class
Operate the inverter in the open phase operation with the conditions including the outdoor air
temperature, discharge pipe temperature, and fin temperature (internal temperature of PM1).
Detail

25/35 class
Outside temperature ≥ 10°C → Control A (preheating for normal state)
Outside temperature < 10°C → Control B (preheating of increased capacity)
Control A

ON condition
Discharge pipe temperature < 10°C
Fin temperature < 85°C

OFF condition
Discharge pipe temperature > 12°C
Fin temperature ≥ 90°C
Control B

ON condition
Discharge pipe temperature < 20°C
Fin temperature < 85°C

OFF condition
Discharge pipe temperature > 22°C
Fin temperature ≥ 90°C

50 class
Outside temperature ≥ 10°C → Control A (preheating for normal state)
Outside temperature < 10°C → Control B (preheating of increased capacity)
Control A

ON condition
Discharge pipe temperature < 6°C
Fin temperature < 85°C

OFF condition
Discharge pipe temperature > 8°C
Fin temperature ≥ 90°C
Control B

ON condition
Discharge pipe temperature < 10.5°C
Fin temperature < 85°C

OFF condition
Discharge pipe temperature > 12°C
Fin temperature ≥ 90°C
Note: The power consumption of compressor during preheat operation is 35 W.