Daikin FLKS25BAVMB - Fan Speed Control for Indoor Units

SiENBE05-722_A Main Functions
Function and Control 25
1.4 Fan Speed Control for Indoor Units
Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH.
The airflow rate can be automatically controlled depending on the difference between the room
thermistor temperature and the target temperature. This is done through phase control and Hall
IC control.
For more information about Hall IC, refer to the troubleshooting for fan motor on page 72.
Automatic Fan
Speed Control
In automatic fan speed operation, the step “SL” is not available.
= The airflow rate is automatically controlled within this range when the FAN setting
button is set to automatic
.
<Cooling>
The following drawing explains the principle of fan speed control for cooling.
<Heating>
On heating mode, the fan speed is regulated according to the indoor heat exchanger
temperature and the difference between the room thermistor temperature and the target
temperature.
Note: 1. During POWERFUL operation, the fan rotates at H tap + 50 rpm.
2. The fan stops during defrost operation.
Step Cooling Heating
LLL
LL
L
ML
M
MH
H
HH (POWERFUL)
(R11577)
(R11578)
+1.5°C
+1.5°C
+0.5°C
+0.5°C
+2°C
+1°C
M
ML
L
fan speed
(R12390)
Difference between the room thermistor
temperature and the target temperature
SiENBE05-722_A.pdf 34 24/02/2011 14:05:54