Program Dry Function - Daikin FTXS09HVJU Service Manual

Main Functions
LLL
LL
L
ML
M
MH
H
HH (POWERFUL)
is set to automatic.
1. During POWERFUL operation, fan operate H tap + 50 - 90 rpm.
Note:
2. Fan stops during defrost operation.
In heating mode, the indoor fan speed is regulated according to the indoor heat exchanger
Automatic
temperature and the difference between the room temperature and the required set point.
Airflow Control
for Heating
The following drawing explains the principle of fan speed control for cooling:
Automatic
Airflow Control
for Cooling
1.4

Program Dry Function

Program dry function removes humidity while preventing the room temperature from lowering.
Since the microcomputer controls both the temperature and airflow volume, the temperature
adjustment and fan adjustment buttons are inoperable in this mode.
The microcomputer automatically sets the temperature and fan settings. The difference between
In Case of
the room temperature at startup and the temperature set by the microcomputer is divided into two
Inverter Units
zones. Then, the unit operates in the dry mode with an appropriate capacity for each zone to
maintain the temperature and humidity at a comfortable level.
26
= Within this range the airflow rate is automatically controlled when the FAN setting button
fan speed
+Δ2.7˚F
+Δ0.9˚F
Thermostat
setting
temperature
Room temperature at
startup
75ºF or more
Room temperature at
74ºF (23.3ºC)
64ºF (17.8ºC)
(R4085) (R4085)
M
ML
L
Phase control
Set temperature Thermostat OFF point
X
– 
X
startup
– 
X
+Δ3.6˚F Difference between room
and set temperature
+Δ1.8˚F
Thermostat ON point
Y
– 
X 0.9ºF (0.5ºC)
4.5ºF (2.5ºC)

Y + 0.9ºF (0.5ºC)
(zone B) continues for
– 
X 0.9ºF (0.5ºC)
3.6ºF (2.0ºC)

Y + 0.9ºF(0.5ºC)
(zone B) continues for
Function and Control
SiUS04-904
(R4146)
Z
or
or