Daikin FHYB45FV1 [74/244] Air flow volume shift control

Daikin FHYB35FV1 [74/244] Air flow volume shift control
Si-71A Function Details
Explanation of Function Operation 63
Draft Avoidance
Control 2
When hot start is canceled or when cold air prevention control is finished, if the fan speed is set to “H,” the
fan turns at L speed for a certain amount of time, thus avoiding draft while the flap is moving.
Air Flow Volume
Shift Control
The air flow volume of an indoor unit is varied to prevent shutdown due to a rise in the high pressure level.
(Air volume up at heating operation)
1. When indoor unit suction air temperature is 25°C or higher
ON condition Tc
60°C
Reset condition Tc<50°C
Note that the air flow volume is varied for a preset time when the thermostat is ON.
2. When indoor unit suction air temperature is lower than 25°C
ON conditionTc
60°C
Reset conditionTc<59°C
Freeze Prevention
Control
The thermostat turns OFF under the following temperature conditions to prevent freezing of the indoor unit
heat exchanger.
The motorized valve is controlled to maintain the indoor unit heat exchanger temperature (Te) above
0°C.
The outdoor unit fan speed is reduced to prevent freeze prevention control from activating during
cooling operation under low outside air temperature. (For details, see the section on cooling operation
under low outside air temperature.)
Outdoor Unit
Identification
Function
If the indoor unit is for both a heat pump and cooling only type, this function differentiates whether the
outdoor unit is functioning as a heat pump or cooling only unit, and automatically decides the which
operation modes can be set.
Operation modes which can be set
Heat pump : Fan / cool / dry / auto / heat
Cooling only : Fan / cool / dry

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