Si01-501 Functions of FT60D Model
Defails of Functions 33
2.3 Fan Speed Control for Indoor Units
Control Mode The airflow rate can be automatically controlled depending on the difference between the set
temperature and the room temperature. This is done through rotation speed control and Hall IC
control.
For more information about Hall IC, refer to the troubleshooting for fan motor on page 109.
Fan Speed Steps Fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H and HH.
= Within this range the airflow rate is automatically controlled when the FAN setting
button is set to automatic.
Note: 1. During powerful operation, fan operates H tap + 90 rpm.
2. In time of thermostat OFF, the fan rotates at the set tap.
Automatic Air
Flow Control for
Cooling
The following drawing explains the principle of fan speed control for cooling:
Step Cooling Dry mode
LL
800 - 950 rpm
SL (Silent)
L
ML
M
MH
H
HH (Powerful)
(R2818)
+1.5˚C
+0.5˚C
+2˚C
+1˚C
M
ML
L
fan speed
Difference between room
and set temperature
Phase control
Thermostat
setting
temperature
(R2820)
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