Dew Condensation Prevention Control - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

Indoor Unit

1.1.9 Dew Condensation Prevention Control

(FHQ71·100, FAQ71·100)
In cooling and dry operation, the following control is carried out in order to prevent dew
condensation when the horizontal blade blows air downward.
[Start condition]
&
[Dew condensation prevention control]
Dry operation with horizontal air flow is carried out for one hour (*1).
Note 1. When there is any change to heating/fan modes, airflow direction and operation ON/OFF
2. *1: For FAQ71, the air flow is 44 degrees downward from the horizontal direction.
1.1.10 Anti-freezing Control
*1 FHQ Only
1.1.11 Monitoring Control
In case where the indoor unit fan is turned OFF while the cooling/heating/dry thermostat is OFF,
the thermistor cannot detect the air temperature even when the room temperature subsequently
recovers and reaches the temperature to turn ON the thermistor because the indoor unit suction
air thermistor is installed within the machine.
In order to avoid such situation, this monitoring control functions to detect indoor air temperature
by operating the fan at a certain interval when the fan is turned OFF while the thermostat is
OFF.
52
• Horizontal blade is set to downward flow
• Cooling operation (compressor operation) continues for A minutes.
FHQ
A 30 min.
state during dew condensation prevention control, this control is reset.
Based on the judgment to prevent the indoor heat exchanger from freezing, the thermostat is
forcedly turned OFF.
Indoor unit
heat exchanger
temperature
(Te)
7ºC
4ºC
-1ºC
-3ºC
FAQ
20 min.
Freeze prevention control
Reset after a continuous 10 minutes and cumulative
timer cleared after a continuous 10 minutes
Cumulative timer cleared after a continuous 20 minutes
The thermostat turns OFF after a cumulative 40
minutes
The thermostat turns OFF after a continuous 1 minute
after 8 minutes from startup (*1)
SiBE26-701
Function and Operation