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Control Specification (09/12 Class)
SiUS04-904
36
Function and Control
3. Control Specification (09/12 Class)
3.1
Mode Hierarchy
Outline
There are two modes; the mode selected by the user (normal air conditioning mode) and forced
operation mode for installing and servicing.
Detail
Modes available are
stop
,
cooling
(includes drying), and
heating
(includes defrosting)
Note:
Unless specified otherwise, an indoor dry operation command must be regarded as cooling
operation.
3.2
Frequency Control
Outline
Frequency is determined according to the difference between room and set temperature.
The function is explained as follows.
1. How to determine frequency.
2. Frequency command from an indoor unit. The difference between a room temperature and the
temperature set by the remote controller.
3. Frequency command from an indoor unit.
4. Frequency initial setting.
5. PI control.
Air conditioner control mode
Forced operating mode
Forced cooling (for Pump Down Operation)
Normal operating mode
Cooling
Heating
Defrosting
Stop mode (except for cooling/heating modes by indoor command)
Preheat operation
During C (capacitor) is discharging
Stop
(R2829)
Command fre
qu
ency
Limit fre
q
uency
Skip control
Upper limit f
u
nction
Compressor protection f
u
nction
Lo
w
er limit f
u
nction
Fo
u
r-
w
ay
v
al
v
e operating compensation, etc. (*)
Initial fre
qu
ency
PI control
Defrost control (*)
Dropping f
u
nction
Inp
u
t c
u
rrent control, etc.
Upper limit fre
q
uency
Lower limit fre
q
uency
FMIN
Tar
g
et fre
q
uency
Command fre
qu
ency X repeats
w
hen fre
qu
ency
b
ecomes lo
w
er
Fre
qu
ency changes
b
y PI control < repeats
w
hen fre
qu
ency
b
ecomes lo
w
er
*; only for heat p
u
mp model
(R2
8
31)
Содержание FTXS09HVJU
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