Controls At Mode Changing / Start-Up - Daikin J Series Service Manual

SiBE041101
3.3

Controls at Mode Changing / Start-up

3.3.1 Preheating Operation
Outline The inverter operation in open phase starts with the conditions of the preheating command from
the indoor unit, the outdoor temperature, and the discharge pipe temperature.
Detail
Outdoor temperature ≥ 7°C → Control A
Outdoor temperature < 7°C → Control B
Control A
Control B
ON Condition
OFF Condition
Outdoor temperature ≥ 10°C → Control A
Outdoor temperature < 10°C → Control B
Control A
Control B
Function and Control
RK(X)S20/25/35J2V1B
ON condition
Discharge pipe temperature < 10°C
OFF condition
Discharge pipe temperature > 12°C
Radiation fin temperature ≥ 90°C
ON condition
Discharge pipe temperature < 20°C
OFF condition
Discharge pipe temperature > 22°C
Radiation fin temperature ≥ 90°C
RK(X)S42J2V1B
When the discharge pipe temperature is below 10ºC, the inverter operation in open phase
starts.
When the discharge pipe temperature is higher than 12ºC, the inverter operation in open
phase stops.
RK(X)S50J2V1B
ON condition
Discharge pipe temperature < 6°C
OFF condition
Discharge pipe temperature > 8°C
Radiation fin temperature ≥ 90°C
ON condition
Discharge pipe temperature < 10.5°C
OFF condition
Discharge pipe temperature > 12°C
Radiation fin temperature ≥ 90°C
Control Specification
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