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SiEN18-622
Protection Control
Function
111
4.5
Freeze-up Protection Control
Outline
According to the freeze prevention status sent from the BP unit. The compressor output
frequency is regulated to decrease the compressor capacity in order to prevent the indoor heat
exchanger from freezing.
Detail
Zones are produced based on the freeze prevention status signal sent from the BP unit (Indoor
unit), and the freeze prevention control prevents freezing of the indoor unit.
Recovery zone: Lift the control
Increase zone: 1 step up/60sec.
Keep zone: Frequency is not controlled
Decrease zone: 1 step down/60sec.
Stop zone: Thermostat-OFF (only the target indoor unit)
The temperature in above figure depends on models. (Reference value)
°C
1
3
7
5
3
0
Recovery zone
Incre
as
e zone
Keep zone
Decre
as
e zone
S
top zone
Indoor
u
nit he
a
t e
xch
a
nger
temper
a
t
u
re
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 ...