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SiENBE04-512A
Main Functions
Function and Control
39
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 trouble shooting for fan motor on page 105.
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 operate 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)
25 · 35kW class :
500 - 860 rpm
(During powerful operation :
850 - 910 rpm)
LL (Cooling thermostat OFF)
SL (Silent)
L
ML
M
MH
H
HH (Powerful)
(R4085)
(R4085)
-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
SiENBE04-512A.book Page 39 Friday, October 5, 2007 1:49 PM
Summary of Contents for FTKS20CVMB(9)
Page 1: ...SiENBE04 512A Service Manual Inverter Pair Wall Mounted Type C Series D Series...
Page 17: ...List of Functions SiENBE04 512A 8 List of Functions...
Page 37: ...Specifications SiENBE04 512A 28 Specifications...
Page 73: ...Control Specification SiENBE04 512A 64 Function and Control...
Page 103: ...Instruction SiENBE04 512A 94 System Configuration...
Page 147: ...Check SiENBE04 512A 138 Service Diagnosis...
Page 225: ...Outdoor Unit RK X H C ARK X H C R Y N C SiENBE04 512A 216 Removal Procedure...
Page 229: ...Others SiENBE04 512A 220 Others...
Page 241: ...Wiring Diagrams SiENBE04 512A 232 Appendix...