Control Specification
SiUS041829E
52
Part 4 Functions and Control
3.6 Freeze-up Protection Control
Outline
During cooling operation, the signal sent from the indoor unit determines the frequency upper limit
and prevents freezing of the indoor heat exchanger. The signals from the indoor unit are divided
into zones.
Details
The operating frequency limitation is judged with the indoor heat exchanger temperature.
R4003563
3.7 Heating Peak-cut Control
During heating operation, the indoor heat exchanger temperature determines the frequency upper
limit to prevent abnormal high pressure.
The operating frequency limitation is judged with the indoor heat exchanger temperature.
Reset zone
Up zone
Keep zone
Dropping zone
Stop zone
13°C (55.4°F)
6.5°C (44°F)
5.5°C (41.9°F)
0°C (32°F)
6°C (43°F)
(Reference)
Indoor heat exchanger
temperat
u
re (R2T)
Zone
Control
Stop zone
When the temperature reaches the stop zone, the compressor stops.
Dropping zone
The upper limit of frequency decreases.
Keep zone
The upper limit of frequency is kept.
Up zone
The upper limit of frequency increases.
Reset zone
The upper limit of frequency is canceled.
09/12 class
18 class
(°C)
(°F)
(°C)
(°F)
A
57.5
135.5
60
140.0
B
55
131.0
55
131.0
C
52
125.6
52
125.6
D
50
122.0
50
122.0
E
45
113.0
45
113.0
Indoor heat exchanger
temperat
u
re
Stop zone
Dropping zone
Keep zone
Up zone
Reset zone
(R23928)
D
C
B
A
E
Содержание FTXR-T Series
Страница 17: ...SiUS041829E Part 2 Specifications 13 1 Specifications 14 Part 2 Specifications...
Страница 125: ...SiUS041829E Check Part 6 Service Diagnosis 121 18 class R25105 1 2 3 4 Multimeter...
Страница 127: ...SiUS041829E Check Part 6 Service Diagnosis 123 18 class R20704 W V U DC_P1 DC_N1...
Страница 139: ...SiUS041829E Piping Diagrams Part 8 Appendix 135 1 2 Outdoor Unit RX09 12RMVJU9 RX18RMVJU9 3D092207C 3D092220C...
Страница 143: ...SiUS041829E Operation Limit Part 8 Appendix 139 4 Operation Limit RX09 12 18RMVJU9 3D092209E...
