SiE12-411
Main Functions
Function and Control
73
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 172.
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.
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 (Heating thermostat OFF)
20 · 25 · 35kW class :
500 - 860 rpm
(During powerful operation :
850 - 910 rpm)
50 · 60 · 71kW class :
750 - 1000 rpm
(During powerful operation :
1050 rpm)
LL (Cooling thermostat OFF)
SL (Silent)
L
ML
M
MH
H
HH (Powerful)
(R2818)
(R2818)
-1.5°C
-1.5°C
-0.5°C
-0.5°C
-1°C
-1°C
-2°C
-2°C
L
ML
M
Ph
as
e control
f
a
n
s
peed
(R2
8
19)
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
+1.5°C
+1.5°C
+0.5°C
+0.5°C
+2°C
+2°C
+1°C
+1°C
M
ML
L
f
a
n
s
peed
Ph
as
e control
(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
Summary of Contents for Super Multi NX C-Series
Page 6: ...SiE12 411 Table of Contents v Index i Drawings Flow Charts v...
Page 7: ...SiE12 411 vi Table of Contents...
Page 67: ...Specifications SiE12 411 56 Specifications...
Page 171: ...Instruction SiE12 411 160 System Configuration...
Page 225: ...Check SiE12 411 214 Service Diagnosis...
Page 295: ...SiE12 411 iv Index...
