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SiEN04-306D
Main Functions
Function and Control
45
1.3
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 phase control and Hall IC control.
For more information about Hall IC, refer to the troubleshooting for fan motor on page 111.
Phase Steps
Phase control and 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 + 50 - 90 rpm.
2. Fan stops during defrost operation.
3. In time of thermostat OFF, the fan rotates at the following speed.
Cooling: The fan keeps rotating at the set tap.
Heating: The fan keeps rotating at LLL tap.
Automatic Air
Flow Control for
Heating
The following drawing explains the principle for fan speed control for heating:
Automatic Air
Flow Control for
Cooling
The following drawing explains the principle of fan speed control for cooling:
Step
Cooling
Heating
Dry mode
LLL
50 · 60 · 71kW class :
750 - 1000 rpm
(During powerful operation :
1050 rpm)
LL
SL (Silent)
L
ML
M
MH
H
HH (Powerful)
(R2818)
(R5229)
-1.5°C
-1.5°C
-0.5°C
-0.5°C
-1°C
-1°C
-2°C
-2°C
L
ML
M
(R2
8
19)
Thermo
s
t
a
t
s
etting
temper
a
t
u
re
Ph
as
e control
f
a
n
s
peed
Difference
b
etween room
a
nd
s
et temper
a
t
u
re
+1.5°C
+1.5°C
+0.5°C
+0.5°C
+2°C
+2°C
+1°C
+1°C
M
ML
L
(R2
8
20)
Thermo
s
t
a
t
s
etting
temper
a
t
u
re
Difference
b
etween room
a
nd
s
et temper
a
t
u
re
Ph
as
e control
f
a
n
s
peed
Summary of Contents for SiEN04-306D
Page 109: ...Instruction SiEN04 306D 100 System Configuration...
Page 199: ...Outdoor Unit SiEN04 306D 190 Removal Procedure...
Page 203: ...Others SiEN04 306D 194 Others...
Page 214: ...SiEN04 306D Wiring Diagrams Appendix 205 FTKD18 24 28BVMS...
Page 216: ...SiEN04 306D Wiring Diagrams Appendix 207 RKD18 24 28BVMS...