Indoor Unit (SkyAir Models)
SiEN18-622
134
Function
8.3
Function Details
Thermostat
Control
Freeze-up
Protection
Control
The thermostat turns OFF under the following temperature conditions to prevent freezing of the
indoor unit heat exchanger.
The motorized valve is controlled to maintain the indoor unit heat exchanger temperature
(Te) above 0°C.
The outdoor unit fan speed is reduced to prevent freeze-up protection control from activating
during cooling operation under low outside air temperature. (For details, see the section on
cooling operation under low outside air temperature.)
S
et temper
a
t
u
re
Initi
a
l
s
etting
Cooling
thermo
s
t
a
t ON
Cooling
thermo
s
t
a
t OFF
He
a
ting
thermo
s
t
a
t OFF
Cool/He
a
t A
u
tom
a
tic
He
a
ting
Cooling
Di
s
pl
a
y
S
etting
S
etting
Di
s
pl
a
y
Di
s
pl
a
y
He
a
ting
thermo
s
t
a
t ON
O
u
tdoor
u
nit he
a
t exch
a
nger temper
a
t
u
re
Freeze prevention control
Re
s
et
a
fter 10 contin
u
o
us
min
u
te
s
Thermo
s
t
a
t OFF
a
fter 1 contin
u
o
us
min
u
te
from
8
min.
a
fter
s
t
a
rting (FHQ only)
Thermo
s
t
a
t OFF
a
fter
1 contin
u
o
us
min
u
te from
8
min.
a
fter
s
t
a
rting
Thermo
s
t
a
t OFF
a
fter
40 c
u
m
u
l
a
tive min
u
te
s
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...
